Messaging: Upsert mentions into unreads.

Messaging: Allow multiple attachment upload.

.dockerignore

@@ -0,0 +1,3 @@
+target
+.mongo
+.env

.gitignore

@@ -1,3 +1,7 @@
+Rocket.toml
 /target
+/target_backup
 **/*.rs.bk
+.mongo
 .env
+avatar.png

.gitlab-ci.yml

@@ -0,0 +1,20 @@
+stages:
+  - build
+
+# Rocket does not currently compile on stable Rust.
+# Once it does, we can uncomment this, and instead
+# put `allow-failure: true` on the nightly build.
+#
+# rust-latest:
+#   stage: build
+#   image: rust:latest
+#   script:
+#     - cargo build --verbose
+#     - cargo test --verbose
+
+rust-nightly:
+  stage: build
+  image: rustlang/rust:nightly
+  script:
+    - cargo build --verbose
+    - cargo test --verbose

.vscode/settings.json

@@ -0,0 +1,5 @@
+{
+    "rust-analyzer.diagnostics.disabled": [
+        "unresolved-macro-call"
+    ]
+}

Cargo.toml

@@ -1,29 +1,48 @@
 [package]
 name = "revolt"
-version = "0.2.0"
+# To help optimise CI and Docker builds.
+# Version here is left as 0.0.0, please
+# adjust and run ./set_version.sh instead.
+version = "0.0.0"
 authors = ["Paul Makles <paulmakles@gmail.com>"]
 edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-mongodb = "0.9.2"
-bson = "0.14.1"
-rocket = { version = "0.4.4", default-features = false }
-once_cell = "1.3.1"
-dotenv = "0.15.0"
-ulid = "0.3.1"
-serde = { version = "1.0", features = ["derive"] }
-rocket_contrib = "0.4.4"
-validator = "0.10.0"
-bcrypt = "0.7.0"
-chrono = "0.4.11"
+regex = "1"
+md5 = "0.7.0"
+log = "0.4.11"
+ulid = "0.4.1"
 rand = "0.7.3"
-time = "0.2.9"
-reqwest = { version = "0.10.4", features = ["blocking", "json"] }
-num_enum = "0.4.3"
-ws = "0.9.1"
-hashbrown = "0.7.1"
-serde_json = "1.0.51"
-rocket_cors = "0.5.2"
+time = "0.2.16"
+nanoid = "0.4.0"
+base64 = "0.13.0"
+linkify = "0.6.0"
+dotenv = "0.15.0"
+futures = "0.3.8"
+chrono = "0.4.15"
+num_enum = "0.5.1"
+impl_ops = "0.1.1"
+web-push = "0.7.2"
+once_cell = "1.4.1"
 bitfield = "0.13.2"
+env_logger = "0.7.1"
+serde_json = "1.0.57"
+lazy_static = "1.4.0"
+urlencoding = "1.1.1"
+many-to-many = "0.1.2"
+lettre = "0.10.0-alpha.1"
+reqwest = { version = "0.10.8", features = ["json"] }
+serde = { version = "1.0.115", features = ["derive"] }
+validator = { version = "0.11", features = ["derive"] }
+ctrlc = { version = "3.0", features = ["termination"] }
+hive_pubsub = { version = "0.4.4", features = ["mongo"] }
+async-std = { version = "1.8.0", features = ["tokio02", "attributes"] }
+async-tungstenite = { version = "0.10.0", features = ["async-std-runtime"] }
+rocket_cors = { git = "https://github.com/insertish/rocket_cors", branch = "master" }
+mongodb = { version = "1.1.1", features = ["tokio-runtime"], default-features = false }
+rauth = { git = "https://gitlab.insrt.uk/insert/rauth", rev = "1db825a0059639144ea8802f6d51b5d27c5b986e" }
+rocket_contrib = { git = "https://github.com/SergioBenitez/Rocket", rev = "031948c1daaa146128d8a435be116476f2adde00" }
+rocket_prometheus = { git = "https://github.com/insertish/rocket_prometheus", rev = "3d825aedb42793246c306a81fe67c5b187948983" }
+rocket = { git = "https://github.com/SergioBenitez/Rocket", rev = "031948c1daaa146128d8a435be116476f2adde00", default-features = false }

Dockerfile

@@ -0,0 +1,25 @@
+# Build Stage
+FROM ekidd/rust-musl-builder:nightly-2021-01-01 AS builder
+USER 0:0
+WORKDIR /home/rust/src
+
+RUN USER=root cargo new --bin revolt
+WORKDIR /home/rust/src/revolt
+COPY Cargo.toml Cargo.lock ./
+COPY src/bin/dummy.rs ./src/bin/dummy.rs
+RUN cargo build --release --bin dummy
+
+COPY assets/templates ./assets/templates
+COPY src ./src
+RUN cargo build --release
+
+# Bundle Stage
+FROM alpine:latest
+RUN apk update && apk add ca-certificates && rm -rf /var/cache/apk/*
+COPY --from=builder /home/rust/src/revolt/target/x86_64-unknown-linux-musl/release/revolt ./
+COPY assets ./assets
+EXPOSE 8000
+EXPOSE 9000
+ENV ROCKET_ADDRESS 0.0.0.0
+ENV ROCKET_PORT 8000
+CMD ["./revolt"]

LICENSE

@@ -0,0 +1,661 @@
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
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+ Everyone is permitted to copy and distribute verbatim copies
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+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+  In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement).  To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+  If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+  If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Remote Network Interaction; Use with the GNU General Public License.
+
+  Notwithstanding any other provision of this License, if you modify the
+Program, your modified version must prominently offer all users
+interacting with it remotely through a computer network (if your version
+supports such interaction) an opportunity to receive the Corresponding
+Source of your version by providing access to the Corresponding Source
+from a network server at no charge, through some standard or customary
+means of facilitating copying of software.  This Corresponding Source
+shall include the Corresponding Source for any work covered by version 3
+of the GNU General Public License that is incorporated pursuant to the
+following paragraph.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the work with which it is combined will remain governed by version
+3 of the GNU General Public License.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU Affero General Public License from time to time.  Such new versions
+will be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU Affero General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU Affero General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU Affero General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    Server
+    Copyright (C) 2021  REVOLT
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<https://www.gnu.org/licenses/>.

README.md

@@ -0,0 +1,20 @@
+![](assets/banner.png)
+
+Delta is a **blazing fast API server** built with Rust for the REVOLT platform.
+
+Features:
+- Robust and efficient API routes for running a chat platform.
+- Distributed notification system, allowing any node to be seamlessly connected.
+- Simple deployment, based mostly on pure Rust code and libraries.
+- Hooks up to a MongoDB deployment, provide URI and no extra work needed.
+
+## Docker Helper Scripts
+
+If you have Docker installed, you can use the helper scripts to deploy Revolt in your development environment.
+
+```bash
+./build.sh   # build Docker image
+./run.sh     # run Docker container
+./monitor.sh # view container logs
+./remove.sh  # kill and remove container
+```

Rocket.toml

@@ -1,7 +0,0 @@
-[development]
-address = "192.168.0.10"
-port = 5500
-
-[production]
-address = "192.168.0.10"
-port = 3000

assets/templates/reset.html

@@ -0,0 +1,62 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" lang="en-GB">
+<head>
+	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+	<title>Reset your password.</title>
+	<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
+
+	<style type="text/css">
+		a[x-apple-data-detectors] {color: inherit !important;}
+	</style>
+
+</head>
+<body style="margin: 0; padding: 0;">
+	<table role="presentation" border="0" cellpadding="0" cellspacing="0" width="100%">
+		<tr>
+			<td style="padding: 20px 0 30px 0;">
+
+<table align="center" border="0" cellpadding="0" cellspacing="0" width="600" style="border-collapse: collapse; border: 1px solid #cccccc;">
+	<tr>
+		<td align="center" bgcolor="#ff4654">
+			<img src="https://revolt.chat/header.png" alt="REVOLT logo" width="600" height="168" style="display: block;" />
+		</td>
+	</tr>
+	<tr>
+		<td bgcolor="#ffffff" style="padding: 40px 30px 40px 30px;">
+			<table border="0" cellpadding="0" cellspacing="0" width="100%" style="border-collapse: collapse;">
+				<tr>
+					<td style="color: #153643; font-family: Arial, sans-serif;">
+						<h1 style="font-size: 24px; margin: 0;">Reset your password!</h1>
+					</td>
+				</tr>
+				<tr>
+					<td style="color: #153643; font-family: Arial, sans-serif; font-size: 16px; line-height: 24px; padding: 20px 0 0 0;">
+						<p style="margin: 0;">
+              Reset your password by <a href="{{url}}">clicking here</a>.
+            </p>
+            <p>
+              Or by manually navigating to the URL: {{url}}
+            </p>
+					</td>
+				</tr>
+			</table>
+		</td>
+	</tr>
+	<tr>
+		<td bgcolor="#ff4654" style="padding: 30px 30px;">
+    		<table border="0" cellpadding="0" cellspacing="0" width="100%" style="border-collapse: collapse;">
+				<tr>
+					<td style="color: #ffffff; font-family: Arial, sans-serif; font-size: 14px;">
+            <p style="margin: 0;">Sent by REVOLT. &middot; <a style="color: white;" href="https://revolt.chat">Website</a> &middot; <a style="color: white;" href="https://gitlab.insrt.uk/revolt">Source Code</a></p>
+					</td>
+				</tr>
+			</table>
+		</td>
+	</tr>
+</table>
+
+			</td>
+		</tr>
+	</table>
+</body>
+</html>

assets/templates/verify.html

@@ -0,0 +1,62 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" lang="en-GB">
+<head>
+	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+	<title>Verify your account.</title>
+	<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
+
+	<style type="text/css">
+		a[x-apple-data-detectors] {color: inherit !important;}
+	</style>
+
+</head>
+<body style="margin: 0; padding: 0;">
+	<table role="presentation" border="0" cellpadding="0" cellspacing="0" width="100%">
+		<tr>
+			<td style="padding: 20px 0 30px 0;">
+
+<table align="center" border="0" cellpadding="0" cellspacing="0" width="600" style="border-collapse: collapse; border: 1px solid #cccccc;">
+	<tr>
+		<td align="center" bgcolor="#ff4654">
+			<img src="https://revolt.chat/header.png" alt="REVOLT logo" width="600" height="168" style="display: block;" />
+		</td>
+	</tr>
+	<tr>
+		<td bgcolor="#ffffff" style="padding: 40px 30px 40px 30px;">
+			<table border="0" cellpadding="0" cellspacing="0" width="100%" style="border-collapse: collapse;">
+				<tr>
+					<td style="color: #153643; font-family: Arial, sans-serif;">
+						<h1 style="font-size: 24px; margin: 0;">Verify your account!</h1>
+					</td>
+				</tr>
+				<tr>
+					<td style="color: #153643; font-family: Arial, sans-serif; font-size: 16px; line-height: 24px; padding: 20px 0 0 0;">
+						<p style="margin: 0;">
+              Please verify your account by <a href="{{url}}">clicking here</a>.
+            </p>
+            <p>
+              Or by manually navigating to the URL: {{url}}
+            </p>
+					</td>
+				</tr>
+			</table>
+		</td>
+	</tr>
+	<tr>
+		<td bgcolor="#ff4654" style="padding: 30px 30px;">
+    		<table border="0" cellpadding="0" cellspacing="0" width="100%" style="border-collapse: collapse;">
+				<tr>
+					<td style="color: #ffffff; font-family: Arial, sans-serif; font-size: 14px;">
+            <p style="margin: 0;">Sent by REVOLT. &middot; <a style="color: white;" href="https://revolt.chat">Website</a> &middot; <a style="color: white;" href="https://gitlab.insrt.uk/revolt">Source Code</a></p>
+					</td>
+				</tr>
+			</table>
+		</td>
+	</tr>
+</table>
+
+			</td>
+		</tr>
+	</table>
+</body>
+</html>

docker-compose.yml

@@ -0,0 +1,18 @@
+version: '2'
+
+services:
+  database:
+    image: mongo
+    restart: always
+  web:
+    build: .
+    environment:
+      - REVOLT_MONGO_URI=mongodb://localhost
+      - REVOLT_PUBLIC_URL=https://local.revolt.chat
+      - REVOLT_USE_EMAIL_VERIFICATION=0
+      - REVOLT_UNSAFE_NO_EMAIL=1
+      - REVOLT_UNSAFE_NO_CAPTCHA=1
+    ports:
+      - "8000:8000"
+      - "9000:9000"
+    restart: unless-stopped

publish.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+source set_version.sh
+
+                  docker build -t revoltchat/server:${version} . &&
+docker tag revoltchat/server:${version} revoltchat/server:latest &&
+                        docker push revoltchat/server:${version} &&
+                            docker push revoltchat/server:latest

set_version.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+export version=0.5.0-alpha.5
+echo "pub const VERSION: &str = \"${version}\";" > src/version.rs

src/bin/dummy.rs

@@ -0,0 +1 @@
+fn main() {}

src/database/channel.rs

@@ -1,33 +0,0 @@
-use serde::{Deserialize, Serialize};
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct LastMessage {
-    id: String,
-    user_id: String,
-    short_content: String,
-}
-
-#[derive(Serialize, Deserialize, Debug)]
-pub struct Channel {
-    #[serde(rename = "_id")]
-    pub id: String,
-    #[serde(rename = "type")]
-    pub channel_type: u8,
-
-    // for Direct Messages
-    pub active: Option<bool>,
-
-    // for DMs / GDMs
-    pub last_message: Option<LastMessage>,
-    pub recipients: Option<Vec<String>>,
-
-    // for GDMs
-    pub owner: Option<String>,
-
-    // for Guilds
-    pub guild: Option<String>,
-
-    // for Guilds and Group DMs
-    pub name: Option<String>,
-    pub description: Option<String>,
-}

src/database/entities/channel.rs

@@ -0,0 +1,286 @@
+use crate::database::*;
+use crate::notifications::events::ClientboundNotification;
+use crate::util::result::{Error, Result};
+use futures::StreamExt;
+use mongodb::{
+    bson::{doc, to_document, Document},
+    options::FindOptions,
+};
+use rocket_contrib::json::JsonValue;
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct LastMessage {
+    #[serde(rename = "_id")]
+    id: String,
+    author: String,
+    short: String,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+#[serde(tag = "channel_type")]
+pub enum Channel {
+    SavedMessages {
+        #[serde(rename = "_id")]
+        id: String,
+        user: String,
+    },
+    DirectMessage {
+        #[serde(rename = "_id")]
+        id: String,
+
+        active: bool,
+        recipients: Vec<String>,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        last_message: Option<LastMessage>,
+    },
+    Group {
+        #[serde(rename = "_id")]
+        id: String,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        nonce: Option<String>,
+
+        name: String,
+        owner: String,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        description: Option<String>,
+        recipients: Vec<String>,
+
+        #[serde(skip_serializing_if = "Option::is_none")]
+        icon: Option<File>,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        last_message: Option<LastMessage>,
+    },
+    TextChannel {
+        #[serde(rename = "_id")]
+        id: String,
+        server: String,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        nonce: Option<String>,
+
+        name: String,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        description: Option<String>,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        icon: Option<File>,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        last_message: Option<String>,
+    },
+}
+
+impl Channel {
+    pub fn id(&self) -> &str {
+        match self {
+            Channel::SavedMessages { id, .. }
+            | Channel::DirectMessage { id, .. }
+            | Channel::Group { id, .. }
+            | Channel::TextChannel { id, .. } => id,
+        }
+    }
+
+    pub async fn publish(self) -> Result<()> {
+        get_collection("channels")
+            .insert_one(
+                to_document(&self).map_err(|_| Error::DatabaseError {
+                    operation: "to_bson",
+                    with: "channel",
+                })?,
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "insert_one",
+                with: "channel",
+            })?;
+
+        let channel_id = self.id().to_string();
+        ClientboundNotification::ChannelCreate(self).publish(channel_id);
+
+        Ok(())
+    }
+
+    pub async fn publish_update(&self, data: JsonValue) -> Result<()> {
+        let id = self.id().to_string();
+        ClientboundNotification::ChannelUpdate {
+            id: id.clone(),
+            data,
+            clear: None,
+        }
+        .publish(id);
+
+        Ok(())
+    }
+
+    pub async fn delete(&self) -> Result<()> {
+        let id = self.id();
+        let messages = get_collection("messages");
+
+        // Delete any invites.
+        get_collection("channel_invites")
+            .delete_many(
+                doc! {
+                    "channel": id
+                },
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "delete_many",
+                with: "channel_invites",
+            })?;
+
+        // Delete any unreads.
+        get_collection("channel_unreads")
+            .delete_many(
+                doc! {
+                    "_id.channel": id
+                },
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "delete_many",
+                with: "channel_unreads",
+            })?;
+
+        // Check if there are any attachments we need to delete.
+        let message_ids = messages
+            .find(
+                doc! {
+                    "channel": id,
+                    "attachment": {
+                        "$exists": 1
+                    }
+                },
+                FindOptions::builder().projection(doc! { "_id": 1 }).build(),
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "fetch_many",
+                with: "messages",
+            })?
+            .filter_map(async move |s| s.ok())
+            .collect::<Vec<Document>>()
+            .await
+            .into_iter()
+            .filter_map(|x| x.get_str("_id").ok().map(|x| x.to_string()))
+            .collect::<Vec<String>>();
+
+        // If we found any, mark them as deleted.
+        if message_ids.len() > 0 {
+            get_collection("attachments")
+                .update_many(
+                    doc! {
+                        "message_id": {
+                            "$in": message_ids
+                        }
+                    },
+                    doc! {
+                        "$set": {
+                            "deleted": true
+                        }
+                    },
+                    None,
+                )
+                .await
+                .map_err(|_| Error::DatabaseError {
+                    operation: "update_many",
+                    with: "attachments",
+                })?;
+        }
+
+        // And then delete said messages.
+        messages
+            .delete_many(
+                doc! {
+                    "channel": id
+                },
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "delete_many",
+                with: "messages",
+            })?;
+
+        // Remove from server object.
+        if let Channel::TextChannel { server, .. } = &self {
+            let server = Ref::from_unchecked(server.clone()).fetch_server().await?;
+            let mut update = doc! {
+                "$pull": {
+                    "channels": id
+                }
+            };
+
+            if let Some(sys) = &server.system_messages {
+                let mut unset = doc! {};
+
+                if let Some(cid) = &sys.user_joined {
+                    if id == cid {
+                        unset.insert("system_messages.user_joined", 1);
+                    }
+                }
+
+                if let Some(cid) = &sys.user_left {
+                    if id == cid {
+                        unset.insert("system_messages.user_left", 1);
+                    }
+                }
+
+                if let Some(cid) = &sys.user_kicked {
+                    if id == cid {
+                        unset.insert("system_messages.user_kicked", 1);
+                    }
+                }
+
+                if let Some(cid) = &sys.user_banned {
+                    if id == cid {
+                        unset.insert("system_messages.user_banned", 1);
+                    }
+                }
+
+                if unset.len() > 0 {
+                    update.insert("$unset", unset);
+                }
+            }
+
+            get_collection("servers")
+                .update_one(
+                    doc! {
+                        "_id": server.id
+                    },
+                    update,
+                    None,
+                )
+                .await
+                .map_err(|_| Error::DatabaseError {
+                    operation: "update_one",
+                    with: "servers",
+                })?;
+        }
+
+        // Finally, delete the channel object.
+        get_collection("channels")
+            .delete_one(
+                doc! {
+                    "_id": id
+                },
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "delete_one",
+                with: "channel",
+            })?;
+
+        ClientboundNotification::ChannelDelete { id: id.to_string() }.publish(id.to_string());
+
+        if let Channel::Group { icon, .. } = self {
+            if let Some(attachment) = icon {
+                attachment.delete().await?;
+            }
+        }
+
+        Ok(())
+    }
+}

src/database/entities/invites.rs

@@ -0,0 +1,96 @@
+use mongodb::bson::doc;
+use mongodb::bson::from_document;
+use mongodb::bson::to_document;
+use serde::{Deserialize, Serialize};
+
+use crate::database::get_collection;
+use crate::util::result::Error;
+use crate::util::result::Result;
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+#[serde(tag = "type")]
+pub enum Invite {
+    Server {
+        #[serde(rename = "_id")]
+        code: String,
+        server: String,
+        creator: String,
+        channel: String,
+    },
+    Group {
+        #[serde(rename = "_id")]
+        code: String,
+        creator: String,
+        channel: String,
+    }, /* User {
+           code: String,
+           user: String
+       } */
+}
+
+impl Invite {
+    pub fn code(&self) -> &String {
+        match &self {
+            Invite::Server { code, .. } => code,
+            Invite::Group { code, .. } => code,
+        }
+    }
+
+    pub fn creator(&self) -> &String {
+        match &self {
+            Invite::Server { creator, .. } => creator,
+            Invite::Group { creator, .. } => creator,
+        }
+    }
+
+    pub async fn get(code: &str) -> Result<Invite> {
+        let doc = get_collection("channel_invites")
+            .find_one(doc! { "_id": code }, None)
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "find_one",
+                with: "invite",
+            })?
+            .ok_or_else(|| Error::UnknownServer)?;
+
+        from_document::<Invite>(doc).map_err(|_| Error::DatabaseError {
+            operation: "from_document",
+            with: "invite",
+        })
+    }
+
+    pub async fn save(self) -> Result<()> {
+        get_collection("channel_invites")
+            .insert_one(
+                to_document(&self).map_err(|_| Error::DatabaseError {
+                    operation: "to_bson",
+                    with: "invite",
+                })?,
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "insert_one",
+                with: "invite",
+            })?;
+
+        Ok(())
+    }
+
+    pub async fn delete(&self) -> Result<()> {
+        get_collection("channel_invites")
+            .delete_one(
+                doc! {
+                    "_id": self.code()
+                },
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "delete_one",
+                with: "invite",
+            })?;
+
+        Ok(())
+    }
+}

src/database/entities/message.rs

@@ -0,0 +1,420 @@
+use crate::util::variables::{USE_JANUARY, VAPID_PRIVATE_KEY};
+use crate::{
+    database::*,
+    notifications::{events::ClientboundNotification, websocket::is_online},
+    util::result::{Error, Result},
+};
+
+use futures::StreamExt;
+use mongodb::options::UpdateOptions;
+use mongodb::{
+    bson::{doc, to_bson, DateTime},
+    options::FindOptions,
+};
+use rocket_contrib::json::JsonValue;
+use serde::{Deserialize, Serialize};
+use ulid::Ulid;
+use web_push::{
+    ContentEncoding, SubscriptionInfo, VapidSignatureBuilder, WebPushClient, WebPushMessageBuilder,
+};
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+#[serde(tag = "type")]
+pub enum SystemMessage {
+    #[serde(rename = "text")]
+    Text { content: String },
+    #[serde(rename = "user_added")]
+    UserAdded { id: String, by: String },
+    #[serde(rename = "user_remove")]
+    UserRemove { id: String, by: String },
+    #[serde(rename = "user_joined")]
+    UserJoined { id: String },
+    #[serde(rename = "user_left")]
+    UserLeft { id: String },
+    #[serde(rename = "user_kicked")]
+    UserKicked { id: String },
+    #[serde(rename = "user_banned")]
+    UserBanned { id: String },
+    #[serde(rename = "channel_renamed")]
+    ChannelRenamed { name: String, by: String },
+    #[serde(rename = "channel_description_changed")]
+    ChannelDescriptionChanged { by: String },
+    #[serde(rename = "channel_icon_changed")]
+    ChannelIconChanged { by: String },
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+#[serde(untagged)]
+pub enum Content {
+    Text(String),
+    SystemMessage(SystemMessage),
+}
+
+impl Content {
+    pub async fn send_as_system(self, target: &Channel) -> Result<()> {
+        Message::create(
+            "00000000000000000000000000".to_string(),
+            target.id().to_string(),
+            self,
+            None,
+        )
+        .publish(&target)
+        .await
+    }
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct Message {
+    #[serde(rename = "_id")]
+    pub id: String,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub nonce: Option<String>,
+    pub channel: String,
+    pub author: String,
+
+    pub content: Content,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub attachments: Option<Vec<File>>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub edited: Option<DateTime>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub embeds: Option<Vec<Embed>>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub mentions: Option<Vec<String>>,
+}
+
+impl Message {
+    pub fn create(
+        author: String,
+        channel: String,
+        content: Content,
+        mentions: Option<Vec<String>>,
+    ) -> Message {
+        Message {
+            id: Ulid::new().to_string(),
+            nonce: None,
+            channel,
+            author,
+
+            content,
+            attachments: None,
+            edited: None,
+            embeds: None,
+            mentions,
+        }
+    }
+
+    pub async fn publish(self, channel: &Channel) -> Result<()> {
+        get_collection("messages")
+            .insert_one(to_bson(&self).unwrap().as_document().unwrap().clone(), None)
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "insert_one",
+                with: "message",
+            })?;
+
+        // ! FIXME: all this code is legitimately crap
+        // ! rewrite when can be asked
+
+        let ss = self.clone();
+        let c_clone = channel.clone();
+        async_std::task::spawn(async move {
+            let mut set = if let Content::Text(text) = &ss.content {
+                doc! {
+                    "last_message": {
+                        "_id": ss.id.clone(),
+                        "author": ss.author.clone(),
+                        "short": text.chars().take(128).collect::<String>()
+                    }
+                }
+            } else {
+                doc! {}
+            };
+
+            // ! MARK AS ACTIVE
+            // ! FIXME: temp code
+            let channels = get_collection("channels");
+            match &c_clone {
+                Channel::DirectMessage { id, .. } => {
+                    set.insert("active", true);
+                    channels
+                        .update_one(
+                            doc! { "_id": id },
+                            doc! {
+                                "$set": set
+                            },
+                            None,
+                        )
+                        .await
+                        /*.map_err(|_| Error::DatabaseError {
+                            operation: "update_one",
+                            with: "channel",
+                        })?;*/
+                        .unwrap();
+                }
+                Channel::Group { id, .. } => {
+                    if let Content::Text(_) = &ss.content {
+                        channels
+                            .update_one(
+                                doc! { "_id": id },
+                                doc! {
+                                    "$set": set
+                                },
+                                None,
+                            )
+                            .await
+                            /*.map_err(|_| Error::DatabaseError {
+                                operation: "update_one",
+                                with: "channel",
+                            })?;*/
+                            .unwrap();
+                    }
+                }
+                Channel::TextChannel { id, .. } => {
+                    if let Content::Text(_) = &ss.content {
+                        channels
+                            .update_one(
+                                doc! { "_id": id },
+                                doc! {
+                                    "$set": {
+                                        "last_message": &ss.id
+                                    }
+                                },
+                                None,
+                            )
+                            .await
+                            /*.map_err(|_| Error::DatabaseError {
+                                operation: "update_one",
+                                with: "channel",
+                            })?;*/
+                            .unwrap();
+                    }
+                }
+                _ => {}
+            }
+        });
+
+        // ! FIXME: also temp code
+        // ! THIS ADDS ANY MENTIONS
+        if let Some(mentions) = &self.mentions {
+            let message = self.id.clone();
+            let channel = self.channel.clone();
+            let mentions = mentions.clone();
+            async_std::task::spawn(async move {
+                get_collection("channel_unreads")
+                    .update_many(
+                        doc! {
+                            "_id.channel": channel,
+                            "_id.user": {
+                                "$in": mentions
+                            }
+                        },
+                        doc! {
+                            "$push": {
+                                "mentions": message
+                            }
+                        },
+                        UpdateOptions::builder().upsert(true).build(),
+                    )
+                    .await
+                    /*.map_err(|_| Error::DatabaseError {
+                        operation: "update_many",
+                        with: "channel_unreads",
+                    })?;*/
+                    .unwrap();
+            });
+        }
+
+        self.process_embed();
+
+        let enc = serde_json::to_string(&self).unwrap();
+        ClientboundNotification::Message(self).publish(channel.id().to_string());
+
+        /*
+           Web Push Test Code
+        */
+        let c_clone = channel.clone();
+        async_std::task::spawn(async move {
+            // Find all offline users.
+            let mut target_ids = vec![];
+            match &c_clone {
+                Channel::DirectMessage { recipients, .. } | Channel::Group { recipients, .. } => {
+                    for recipient in recipients {
+                        if !is_online(recipient) {
+                            target_ids.push(recipient.clone());
+                        }
+                    }
+                }
+                _ => {}
+            }
+
+            // Fetch their corresponding sessions.
+            if let Ok(mut cursor) = get_collection("accounts")
+                .find(
+                    doc! {
+                        "_id": {
+                            "$in": target_ids
+                        },
+                        "sessions.subscription": {
+                            "$exists": true
+                        }
+                    },
+                    FindOptions::builder()
+                        .projection(doc! { "sessions": 1 })
+                        .build(),
+                )
+                .await
+            {
+                let mut subscriptions = vec![];
+                while let Some(result) = cursor.next().await {
+                    if let Ok(doc) = result {
+                        if let Ok(sessions) = doc.get_array("sessions") {
+                            for session in sessions {
+                                if let Some(doc) = session.as_document() {
+                                    if let Ok(sub) = doc.get_document("subscription") {
+                                        let endpoint = sub.get_str("endpoint").unwrap().to_string();
+                                        let p256dh = sub.get_str("p256dh").unwrap().to_string();
+                                        let auth = sub.get_str("auth").unwrap().to_string();
+
+                                        subscriptions
+                                            .push(SubscriptionInfo::new(endpoint, p256dh, auth));
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+
+                if subscriptions.len() > 0 {
+                    let client = WebPushClient::new();
+                    let key =
+                        base64::decode_config(VAPID_PRIVATE_KEY.clone(), base64::URL_SAFE).unwrap();
+
+                    for subscription in subscriptions {
+                        let mut builder = WebPushMessageBuilder::new(&subscription).unwrap();
+                        let sig_builder = VapidSignatureBuilder::from_pem(
+                            std::io::Cursor::new(&key),
+                            &subscription,
+                        )
+                        .unwrap();
+                        let signature = sig_builder.build().unwrap();
+                        builder.set_vapid_signature(signature);
+                        builder.set_payload(ContentEncoding::AesGcm, enc.as_bytes());
+                        let m = builder.build().unwrap();
+                        client.send(m).await.ok();
+                    }
+                }
+            }
+        });
+
+        Ok(())
+    }
+
+    pub async fn publish_update(self, data: JsonValue) -> Result<()> {
+        let channel = self.channel.clone();
+        ClientboundNotification::MessageUpdate {
+            id: self.id.clone(),
+            channel: self.channel.clone(),
+            data,
+        }
+        .publish(channel);
+        self.process_embed();
+
+        Ok(())
+    }
+
+    pub fn process_embed(&self) {
+        if !*USE_JANUARY {
+            return;
+        }
+
+        if let Content::Text(text) = &self.content {
+            // ! FIXME: re-write this at some point,
+            // ! or just before we allow user generated embeds
+            let id = self.id.clone();
+            let content = text.clone();
+            let channel = self.channel.clone();
+            async_std::task::spawn(async move {
+                if let Ok(embeds) = Embed::generate(content).await {
+                    if let Ok(bson) = to_bson(&embeds) {
+                        if let Ok(_) = get_collection("messages")
+                            .update_one(
+                                doc! {
+                                    "_id": &id
+                                },
+                                doc! {
+                                    "$set": {
+                                        "embeds": bson
+                                    }
+                                },
+                                None,
+                            )
+                            .await
+                        {
+                            ClientboundNotification::MessageUpdate {
+                                id,
+                                channel: channel.clone(),
+                                data: json!({ "embeds": embeds }),
+                            }
+                            .publish(channel);
+                        }
+                    }
+                }
+            });
+        }
+    }
+
+    pub async fn delete(&self) -> Result<()> {
+        if let Some(attachments) = &self.attachments {
+            for attachment in attachments {
+                attachment.delete().await?;
+            }
+        }
+
+        get_collection("messages")
+            .delete_one(
+                doc! {
+                    "_id": &self.id
+                },
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "delete_one",
+                with: "message",
+            })?;
+
+        let channel = self.channel.clone();
+        ClientboundNotification::MessageDelete {
+            id: self.id.clone(),
+            channel: self.channel.clone(),
+        }
+        .publish(channel);
+
+        if let Some(attachments) = &self.attachments {
+            let attachment_ids: Vec<String> =
+                attachments.iter().map(|f| f.id.to_string()).collect();
+            get_collection("attachments")
+                .update_one(
+                    doc! {
+                        "_id": {
+                            "$in": attachment_ids
+                        }
+                    },
+                    doc! {
+                        "$set": {
+                            "deleted": true
+                        }
+                    },
+                    None,
+                )
+                .await
+                .map_err(|_| Error::DatabaseError {
+                    operation: "update_one",
+                    with: "attachment",
+                })?;
+        }
+
+        Ok(())
+    }
+}

src/database/entities/microservice/autumn.rs

@@ -0,0 +1,115 @@
+use mongodb::bson::{doc, from_document};
+use serde::{Deserialize, Serialize};
+
+use crate::database::*;
+use crate::util::result::{Error, Result};
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+#[serde(tag = "type")]
+enum Metadata {
+    File,
+    Text,
+    Image { width: isize, height: isize },
+    Video { width: isize, height: isize },
+    Audio,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct File {
+    #[serde(rename = "_id")]
+    pub id: String,
+    tag: String,
+    filename: String,
+    metadata: Metadata,
+    content_type: String,
+    size: isize,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    deleted: Option<bool>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    message_id: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    user_id: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    server_id: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    object_id: Option<String>,
+}
+
+impl File {
+    pub async fn find_and_use(
+        attachment_id: &str,
+        tag: &str,
+        parent_type: &str,
+        parent_id: &str,
+    ) -> Result<File> {
+        let attachments = get_collection("attachments");
+        let key = format!("{}_id", parent_type);
+        if let Some(doc) = attachments
+            .find_one(
+                doc! {
+                    "_id": attachment_id,
+                    "tag": &tag,
+                    key.clone(): {
+                        "$exists": false
+                    }
+                },
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "find_one",
+                with: "attachment",
+            })?
+        {
+            let attachment = from_document::<File>(doc).map_err(|_| Error::DatabaseError {
+                operation: "from_document",
+                with: "attachment",
+            })?;
+
+            attachments
+                .update_one(
+                    doc! {
+                        "_id": &attachment.id
+                    },
+                    doc! {
+                        "$set": {
+                            key: &parent_id
+                        }
+                    },
+                    None,
+                )
+                .await
+                .map_err(|_| Error::DatabaseError {
+                    operation: "update_one",
+                    with: "attachment",
+                })?;
+
+            Ok(attachment)
+        } else {
+            Err(Error::UnknownAttachment)
+        }
+    }
+
+    pub async fn delete(&self) -> Result<()> {
+        get_collection("attachments")
+            .update_one(
+                doc! {
+                    "_id": &self.id
+                },
+                doc! {
+                    "$set": {
+                        "deleted": true
+                    }
+                },
+                None,
+            )
+            .await
+            .map(|_| ())
+            .map_err(|_| Error::DatabaseError {
+                operation: "update_one",
+                with: "attachment",
+            })
+    }
+}

src/database/entities/microservice/january.rs

@@ -0,0 +1,154 @@
+use crate::util::{
+    result::{Error, Result},
+    variables::JANUARY_URL,
+};
+use linkify::{LinkFinder, LinkKind};
+use regex::Regex;
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub enum ImageSize {
+    Large,
+    Preview,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct Image {
+    pub url: String,
+    pub width: isize,
+    pub height: isize,
+    pub size: ImageSize,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct Video {
+    pub url: String,
+    pub width: isize,
+    pub height: isize,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub enum TwitchType {
+    Channel,
+    Video,
+    Clip,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub enum BandcampType {
+    Album,
+    Track,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+#[serde(tag = "type")]
+pub enum Special {
+    None,
+    YouTube {
+        id: String,
+    },
+    Twitch {
+        content_type: TwitchType,
+        id: String,
+    },
+    Spotify {
+        content_type: String,
+        id: String,
+    },
+    Soundcloud,
+    Bandcamp {
+        content_type: BandcampType,
+        id: String,
+    },
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct Metadata {
+    #[serde(skip_serializing_if = "Option::is_none")]
+    url: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    special: Option<Special>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    title: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    description: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    image: Option<Image>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    video: Option<Video>,
+
+    // #[serde(skip_serializing_if = "Option::is_none")]
+    // opengraph_type: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    site_name: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    icon_url: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    color: Option<String>,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+#[serde(tag = "type")]
+pub enum Embed {
+    Website(Metadata),
+    Image(Image),
+    None,
+}
+
+impl Embed {
+    pub async fn generate(content: String) -> Result<Vec<Embed>> {
+        lazy_static! {
+            static ref RE_CODE: Regex = Regex::new("```(?:.|\n)+?```|`(?:.|\n)+?`").unwrap();
+        }
+
+        // Ignore code blocks.
+        let content = RE_CODE.replace_all(&content, "");
+
+        let content = content
+            // Ignore quoted lines.
+            .split("\n")
+            .map(|v| {
+                if let Some(c) = v.chars().next() {
+                    if c == '>' {
+                        return "";
+                    }
+                }
+
+                v
+            })
+            .collect::<Vec<&str>>()
+            .join("\n");
+
+        // ! FIXME: allow multiple links
+        // ! FIXME: prevent generation if link is surrounded with < >
+        let mut finder = LinkFinder::new();
+        finder.kinds(&[LinkKind::Url]);
+        let links: Vec<_> = finder.links(&content).collect();
+
+        if links.len() == 0 {
+            return Err(Error::LabelMe);
+        }
+
+        let link = &links[0];
+
+        let client = reqwest::Client::new();
+        let result = client
+            .get(&format!("{}/embed", *JANUARY_URL))
+            .query(&[("url", link.as_str())])
+            .send()
+            .await;
+
+        match result {
+            Err(_) => return Err(Error::LabelMe),
+            Ok(result) => match result.status() {
+                reqwest::StatusCode::OK => {
+                    let res: Embed = result.json().await.map_err(|_| Error::InvalidOperation)?;
+
+                    Ok(vec![res])
+                }
+                _ => return Err(Error::LabelMe),
+            },
+        }
+    }
+}

src/database/entities/microservice/mod.rs

@@ -0,0 +1,2 @@
+pub mod autumn;
+pub mod january;

src/database/entities/mod.rs

@@ -0,0 +1,18 @@
+mod channel;
+mod invites;
+mod message;
+mod microservice;
+mod server;
+mod sync;
+mod user;
+
+use microservice::*;
+
+pub use autumn::*;
+pub use channel::*;
+pub use invites::*;
+pub use january::*;
+pub use message::*;
+pub use server::*;
+pub use sync::*;
+pub use user::*;

src/database/entities/server.rs

@@ -0,0 +1,395 @@
+use crate::database::*;
+use crate::notifications::events::ClientboundNotification;
+use crate::util::result::{Error, Result};
+use futures::StreamExt;
+use mongodb::bson::doc;
+use mongodb::bson::from_document;
+use mongodb::bson::to_document;
+use mongodb::bson::Document;
+use mongodb::options::FindOptions;
+use rocket_contrib::json::JsonValue;
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct MemberCompositeKey {
+    pub server: String,
+    pub user: String,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct Member {
+    #[serde(rename = "_id")]
+    pub id: MemberCompositeKey,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub nickname: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub avatar: Option<File>,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct Ban {
+    #[serde(rename = "_id")]
+    pub id: MemberCompositeKey,
+    pub reason: Option<String>,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct SystemMessageChannels {
+    pub user_joined: Option<String>,
+    pub user_left: Option<String>,
+    pub user_kicked: Option<String>,
+    pub user_banned: Option<String>,
+}
+
+pub enum RemoveMember {
+    Leave,
+    Kick,
+    Ban,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct Server {
+    #[serde(rename = "_id")]
+    pub id: String,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub nonce: Option<String>,
+    pub owner: String,
+
+    pub name: String,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub description: Option<String>,
+    pub channels: Vec<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub system_messages: Option<SystemMessageChannels>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub icon: Option<File>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub banner: Option<File>,
+}
+
+impl Server {
+    pub async fn create(self) -> Result<()> {
+        get_collection("servers")
+            .insert_one(
+                to_document(&self).map_err(|_| Error::DatabaseError {
+                    operation: "to_bson",
+                    with: "channel",
+                })?,
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "insert_one",
+                with: "server",
+            })?;
+
+        Ok(())
+    }
+
+    pub async fn publish_update(&self, data: JsonValue) -> Result<()> {
+        ClientboundNotification::ServerUpdate {
+            id: self.id.clone(),
+            data,
+            clear: None,
+        }
+        .publish(self.id.clone());
+
+        Ok(())
+    }
+
+    pub async fn delete(&self) -> Result<()> {
+        let messages = get_collection("messages");
+
+        // Check if there are any attachments we need to delete.
+        // ! FIXME: make this generic and merge with channel delete
+        // ! e.g. delete_channel(filter: doc!)
+        let message_ids = messages
+            .find(
+                doc! {
+                    "server": &self.id,
+                    "attachment": {
+                        "$exists": 1
+                    }
+                },
+                FindOptions::builder().projection(doc! { "_id": 1 }).build(),
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "fetch_many",
+                with: "messages",
+            })?
+            .filter_map(async move |s| s.ok())
+            .collect::<Vec<Document>>()
+            .await
+            .into_iter()
+            .filter_map(|x| x.get_str("_id").ok().map(|x| x.to_string()))
+            .collect::<Vec<String>>();
+
+        // If we found any, mark them as deleted.
+        if message_ids.len() > 0 {
+            get_collection("attachments")
+                .update_many(
+                    doc! {
+                        "message_id": {
+                            "$in": message_ids
+                        }
+                    },
+                    doc! {
+                        "$set": {
+                            "deleted": true
+                        }
+                    },
+                    None,
+                )
+                .await
+                .map_err(|_| Error::DatabaseError {
+                    operation: "update_many",
+                    with: "attachments",
+                })?;
+        }
+
+        // And then delete said messages.
+        messages
+            .delete_many(
+                doc! {
+                    "server": &self.id
+                },
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "delete_many",
+                with: "messages",
+            })?;
+
+        // Delete all channels, members, bans and invites.
+        for with in &["channels", "channel_invites"] {
+            get_collection(with)
+                .delete_many(
+                    doc! {
+                        "server": &self.id
+                    },
+                    None,
+                )
+                .await
+                .map_err(|_| Error::DatabaseError {
+                    operation: "delete_many",
+                    with,
+                })?;
+        }
+
+        // ! FIXME: delete any unreads
+
+        for with in &["server_members", "server_bans"] {
+            get_collection(with)
+                .delete_many(
+                    doc! {
+                        "_id.server": &self.id
+                    },
+                    None,
+                )
+                .await
+                .map_err(|_| Error::DatabaseError {
+                    operation: "delete_many",
+                    with,
+                })?;
+        }
+
+        get_collection("servers")
+            .delete_one(
+                doc! {
+                    "_id": &self.id
+                },
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "delete_one",
+                with: "server",
+            })?;
+
+        ClientboundNotification::ServerDelete {
+            id: self.id.clone(),
+        }
+        .publish(self.id.clone());
+
+        if let Some(attachment) = &self.icon {
+            attachment.delete().await?;
+        }
+
+        if let Some(attachment) = &self.banner {
+            attachment.delete().await?;
+        }
+
+        Ok(())
+    }
+
+    pub async fn fetch_members(id: &str) -> Result<Vec<Member>> {
+        Ok(get_collection("server_members")
+            .find(
+                doc! {
+                    "_id.server": id
+                },
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "find",
+                with: "server_members",
+            })?
+            .filter_map(async move |s| s.ok())
+            .collect::<Vec<Document>>()
+            .await
+            .into_iter()
+            .filter_map(|x| from_document(x).ok())
+            .collect::<Vec<Member>>())
+    }
+
+    pub async fn fetch_member_ids(id: &str) -> Result<Vec<String>> {
+        Ok(get_collection("server_members")
+            .find(
+                doc! {
+                    "_id.server": id
+                },
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "find",
+                with: "server_members",
+            })?
+            .filter_map(async move |s| s.ok())
+            .collect::<Vec<Document>>()
+            .await
+            .into_iter()
+            .filter_map(|x| {
+                x.get_document("_id")
+                    .ok()
+                    .map(|i| i.get_str("user").ok().map(|x| x.to_string()))
+            })
+            .flatten()
+            .collect::<Vec<String>>())
+    }
+
+    pub async fn join_member(&self, id: &str) -> Result<()> {
+        if get_collection("server_bans")
+            .find_one(
+                doc! {
+                    "_id.server": &self.id,
+                    "_id.user": &id
+                },
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "find_one",
+                with: "server_bans",
+            })?
+            .is_some()
+        {
+            return Err(Error::Banned);
+        }
+
+        get_collection("server_members")
+            .insert_one(
+                doc! {
+                    "_id": {
+                        "server": &self.id,
+                        "user": &id
+                    }
+                },
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "insert_one",
+                with: "server_members",
+            })?;
+
+        ClientboundNotification::ServerMemberJoin {
+            id: self.id.clone(),
+            user: id.to_string(),
+        }
+        .publish(self.id.clone());
+
+        if let Some(channels) = &self.system_messages {
+            if let Some(cid) = &channels.user_joined {
+                let channel = Ref::from_unchecked(cid.clone()).fetch_channel().await?;
+                Content::SystemMessage(SystemMessage::UserJoined { id: id.to_string() })
+                    .send_as_system(&channel)
+                    .await?;
+            }
+        }
+
+        Ok(())
+    }
+
+    pub async fn remove_member(&self, id: &str, removal: RemoveMember) -> Result<()> {
+        let result = get_collection("server_members")
+            .delete_one(
+                doc! {
+                    "_id": {
+                        "server": &self.id,
+                        "user": &id
+                    }
+                },
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "delete_one",
+                with: "server_members",
+            })?;
+
+        if result.deleted_count > 0 {
+            ClientboundNotification::ServerMemberLeave {
+                id: self.id.clone(),
+                user: id.to_string(),
+            }
+            .publish(self.id.clone());
+
+            if let Some(channels) = &self.system_messages {
+                let message = match removal {
+                    RemoveMember::Leave => {
+                        if let Some(cid) = &channels.user_left {
+                            Some((cid.clone(), SystemMessage::UserLeft { id: id.to_string() }))
+                        } else {
+                            None
+                        }
+                    }
+                    RemoveMember::Kick => {
+                        if let Some(cid) = &channels.user_kicked {
+                            Some((
+                                cid.clone(),
+                                SystemMessage::UserKicked { id: id.to_string() },
+                            ))
+                        } else {
+                            None
+                        }
+                    }
+                    RemoveMember::Ban => {
+                        if let Some(cid) = &channels.user_banned {
+                            Some((
+                                cid.clone(),
+                                SystemMessage::UserBanned { id: id.to_string() },
+                            ))
+                        } else {
+                            None
+                        }
+                    }
+                };
+
+                if let Some((cid, message)) = message {
+                    let channel = Ref::from_unchecked(cid).fetch_channel().await?;
+                    Content::SystemMessage(message)
+                        .send_as_system(&channel)
+                        .await?;
+                }
+            }
+        }
+
+        Ok(())
+    }
+}

src/database/entities/sync.rs

@@ -0,0 +1,19 @@
+use serde::{Deserialize, Serialize};
+use std::collections::HashMap;
+
+pub type UserSettings = HashMap<String, (i64, String)>;
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct ChannelCompositeKey {
+    pub channel: String,
+    pub user: String,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct ChannelUnread {
+    #[serde(rename = "_id")]
+    pub id: ChannelCompositeKey,
+
+    pub last_id: Option<String>,
+    pub mentions: Option<Vec<String>>,
+}

src/database/entities/user.rs

@@ -0,0 +1,275 @@
+use futures::StreamExt;
+use mongodb::bson::Document;
+use mongodb::options::{Collation, FindOneOptions};
+use mongodb::{
+    bson::{doc, from_document},
+    options::FindOptions,
+};
+use num_enum::TryFromPrimitive;
+use serde::{Deserialize, Serialize};
+use std::ops;
+use ulid::Ulid;
+use validator::Validate;
+
+use crate::database::permissions::user::UserPermissions;
+use crate::database::*;
+use crate::notifications::websocket::is_online;
+use crate::util::result::{Error, Result};
+use crate::util::variables::EARLY_ADOPTER_BADGE;
+
+#[derive(Serialize, Deserialize, Debug, Clone, PartialEq)]
+pub enum RelationshipStatus {
+    None,
+    User,
+    Friend,
+    Outgoing,
+    Incoming,
+    Blocked,
+    BlockedOther,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct Relationship {
+    #[serde(rename = "_id")]
+    pub id: String,
+    pub status: RelationshipStatus,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub enum Presence {
+    Online,
+    Idle,
+    Busy,
+    Invisible,
+}
+
+#[derive(Validate, Serialize, Deserialize, Debug, Clone)]
+pub struct UserStatus {
+    #[validate(length(min = 1, max = 128))]
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub text: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub presence: Option<Presence>,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct UserProfile {
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub content: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub background: Option<File>,
+}
+
+#[derive(Debug, PartialEq, Eq, TryFromPrimitive, Copy, Clone)]
+#[repr(i32)]
+pub enum Badges {
+    Developer = 1,
+    Translator = 2,
+    Supporter = 4,
+    ResponsibleDisclosure = 8,
+    EarlyAdopter = 256,
+}
+
+impl_op_ex_commutative!(+ |a: &i32, b: &Badges| -> i32 { *a | *b as i32 });
+
+// When changing this struct, update notifications/payload.rs#80
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct User {
+    #[serde(rename = "_id")]
+    pub id: String,
+    pub username: String,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub avatar: Option<File>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub relations: Option<Vec<Relationship>>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub badges: Option<i32>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub status: Option<UserStatus>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub profile: Option<UserProfile>,
+
+    // ? This should never be pushed to the collection.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub relationship: Option<RelationshipStatus>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub online: Option<bool>,
+}
+
+impl User {
+    /// Mutate the user object to include relationship as seen by user.
+    pub fn from(mut self, user: &User) -> User {
+        self.relationship = Some(RelationshipStatus::None);
+
+        if self.id == user.id {
+            self.relationship = Some(RelationshipStatus::User);
+            return self;
+        }
+
+        self.relations = None;
+        if let Some(relations) = &user.relations {
+            if let Some(relationship) = relations.iter().find(|x| self.id == x.id) {
+                self.relationship = Some(relationship.status.clone());
+                return self;
+            }
+        }
+
+        self
+    }
+
+    /// Mutate the user object to appear as seen by user.
+    pub fn with(mut self, permissions: UserPermissions<[u32; 1]>) -> User {
+        let mut badges = self.badges.unwrap_or_else(|| 0);
+        if let Ok(id) = Ulid::from_string(&self.id) {
+            if id.datetime().timestamp_millis() < *EARLY_ADOPTER_BADGE {
+                badges = badges + Badges::EarlyAdopter;
+            }
+        }
+
+        self.badges = Some(badges);
+
+        if permissions.get_view_profile() {
+            self.online = Some(is_online(&self.id));
+        } else {
+            self.status = None;
+        }
+
+        self.profile = None;
+        self
+    }
+
+    /// Mutate the user object to appear as seen by user.
+    /// Also overrides the relationship status.
+    pub async fn from_override(
+        mut self,
+        user: &User,
+        relationship: RelationshipStatus,
+    ) -> Result<User> {
+        let permissions = PermissionCalculator::new(&user)
+            .with_relationship(&relationship)
+            .for_user(&self.id)
+            .await?;
+
+        self.relations = None;
+        self.relationship = Some(relationship);
+        Ok(self.with(permissions))
+    }
+
+    /// Utility function for checking claimed usernames.
+    pub async fn is_username_taken(username: &str) -> Result<bool> {
+        if username.to_lowercase() == "revolt" && username.to_lowercase() == "admin" {
+            return Ok(true);
+        }
+
+        if get_collection("users")
+            .find_one(
+                doc! {
+                    "username": username
+                },
+                FindOneOptions::builder()
+                    .collation(Collation::builder().locale("en").strength(2).build())
+                    .build(),
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "find_one",
+                with: "user",
+            })?
+            .is_some()
+        {
+            Ok(true)
+        } else {
+            Ok(false)
+        }
+    }
+
+    /// Utility function for fetching multiple users from the perspective of one.
+    /// Assumes user has a mutual connection with others.
+    pub async fn fetch_multiple_users(&self, user_ids: Vec<String>) -> Result<Vec<User>> {
+        let mut users = vec![];
+        let mut cursor = get_collection("users")
+            .find(
+                doc! {
+                    "_id": {
+                        "$in": user_ids
+                    }
+                },
+                FindOptions::builder()
+                    .projection(
+                        doc! { "_id": 1, "username": 1, "avatar": 1, "badges": 1, "status": 1 },
+                    )
+                    .build(),
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "find",
+                with: "users",
+            })?;
+
+        while let Some(result) = cursor.next().await {
+            if let Ok(doc) = result {
+                let other: User = from_document(doc).map_err(|_| Error::DatabaseError {
+                    operation: "from_document",
+                    with: "user",
+                })?;
+
+                let permissions = PermissionCalculator::new(&self)
+                    .with_mutual_connection()
+                    .with_user(&other)
+                    .for_user_given()
+                    .await?;
+
+                users.push(other.from(&self).with(permissions));
+            }
+        }
+
+        Ok(users)
+    }
+
+    /// Utility function to get all the server IDs the user is in.
+    pub async fn fetch_server_ids(&self) -> Result<Vec<String>> {
+        Ok(get_collection("server_members")
+            .find(
+                doc! {
+                    "_id.user": &self.id
+                },
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "find",
+                with: "server_members",
+            })?
+            .filter_map(async move |s| s.ok())
+            .collect::<Vec<Document>>()
+            .await
+            .into_iter()
+            .filter_map(|x| {
+                x.get_document("_id")
+                    .ok()
+                    .map(|i| i.get_str("server").ok().map(|x| x.to_string()))
+            })
+            .flatten()
+            .collect::<Vec<String>>())
+    }
+
+    /// Utility function to fetch unread objects for user.
+    pub async fn fetch_unreads(&self) -> Result<Vec<Document>> {
+        Ok(get_collection("channel_unreads")
+            .find(
+                doc! {
+                    "_id.user": &self.id
+                },
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "find_one",
+                with: "user_settings",
+            })?
+            .filter_map(async move |s| s.ok())
+            .collect::<Vec<Document>>()
+            .await)
+    }
+}

src/database/guards/mod.rs

@@ -0,0 +1,4 @@
+pub mod reference;
+pub mod user;
+
+pub use reference::Ref;

src/database/guards/reference.rs

@@ -0,0 +1,141 @@
+use crate::database::*;
+use crate::util::result::{Error, Result};
+
+use mongodb::bson::{doc, from_document};
+use rocket::http::RawStr;
+use rocket::request::FromParam;
+use serde::{de::DeserializeOwned, Deserialize, Serialize};
+use validator::Validate;
+
+#[derive(Validate, Serialize, Deserialize)]
+pub struct Ref {
+    #[validate(length(min = 1, max = 26))]
+    pub id: String,
+}
+
+impl Ref {
+    pub fn from_unchecked(id: String) -> Ref {
+        Ref { id }
+    }
+
+    pub fn from(id: String) -> Result<Ref> {
+        let r = Ref { id };
+        r.validate()
+            .map_err(|error| Error::FailedValidation { error })?;
+        Ok(r)
+    }
+
+    async fn fetch<T: DeserializeOwned>(&self, collection: &'static str) -> Result<T> {
+        let doc = get_collection(&collection)
+            .find_one(
+                doc! {
+                    "_id": &self.id
+                },
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "find_one",
+                with: &collection,
+            })?
+            .ok_or_else(|| Error::NotFound)?;
+
+        Ok(from_document::<T>(doc).map_err(|_| Error::DatabaseError {
+            operation: "from_document",
+            with: &collection,
+        })?)
+    }
+
+    pub async fn fetch_user(&self) -> Result<User> {
+        self.fetch("users").await
+    }
+
+    pub async fn fetch_channel(&self) -> Result<Channel> {
+        self.fetch("channels").await
+    }
+
+    pub async fn fetch_server(&self) -> Result<Server> {
+        self.fetch("servers").await
+    }
+
+    pub async fn fetch_invite(&self) -> Result<Invite> {
+        self.fetch("channel_invites").await
+    }
+
+    pub async fn fetch_member(&self, server: &str) -> Result<Member> {
+        let doc = get_collection("server_members")
+            .find_one(
+                doc! {
+                    "_id.user": &self.id,
+                    "_id.server": server
+                },
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "find_one",
+                with: "server_member",
+            })?
+            .ok_or_else(|| Error::NotFound)?;
+
+        Ok(
+            from_document::<Member>(doc).map_err(|_| Error::DatabaseError {
+                operation: "from_document",
+                with: "server_member",
+            })?,
+        )
+    }
+
+    pub async fn fetch_ban(&self, server: &str) -> Result<Ban> {
+        let doc = get_collection("server_bans")
+            .find_one(
+                doc! {
+                    "_id.user": &self.id,
+                    "_id.server": server
+                },
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "find_one",
+                with: "server_ban",
+            })?
+            .ok_or_else(|| Error::NotFound)?;
+
+        Ok(from_document::<Ban>(doc).map_err(|_| Error::DatabaseError {
+            operation: "from_document",
+            with: "server_ban",
+        })?)
+    }
+
+    pub async fn fetch_message(&self, channel: &Channel) -> Result<Message> {
+        let message: Message = self.fetch("messages").await?;
+        if &message.channel != channel.id() {
+            Err(Error::InvalidOperation)
+        } else {
+            Ok(message)
+        }
+    }
+}
+
+impl User {
+    pub fn as_ref(&self) -> Ref {
+        Ref {
+            id: self.id.to_string(),
+        }
+    }
+}
+
+impl<'r> FromParam<'r> for Ref {
+    type Error = &'r RawStr;
+
+    fn from_param(param: &'r RawStr) -> Result<Self, Self::Error> {
+        if let Ok(result) = Ref::from(param.to_string()) {
+            if result.validate().is_ok() {
+                return Ok(result);
+            }
+        }
+
+        Err(param)
+    }
+}

src/database/guards/user.rs

@@ -0,0 +1,39 @@
+use crate::database::*;
+
+use mongodb::bson::{doc, from_document};
+use rauth::auth::Session;
+use rocket::http::Status;
+use rocket::request::{self, FromRequest, Outcome, Request};
+
+#[rocket::async_trait]
+impl<'a, 'r> FromRequest<'a, 'r> for User {
+    type Error = rauth::util::Error;
+
+    async fn from_request(request: &'a Request<'r>) -> request::Outcome<Self, Self::Error> {
+        let session: Session = try_outcome!(request.guard::<Session>().await);
+
+        if let Ok(result) = get_collection("users")
+            .find_one(
+                doc! {
+                    "_id": &session.user_id
+                },
+                None,
+            )
+            .await
+        {
+            if let Some(doc) = result {
+                Outcome::Success(from_document(doc).unwrap())
+            } else {
+                Outcome::Failure((Status::Forbidden, rauth::util::Error::InvalidSession))
+            }
+        } else {
+            Outcome::Failure((
+                Status::InternalServerError,
+                rauth::util::Error::DatabaseError {
+                    operation: "find_one",
+                    with: "user",
+                },
+            ))
+        }
+    }
+}

src/database/guild.rs

@@ -1,43 +0,0 @@
-use bson::doc;
-use serde::{Deserialize, Serialize};
-
-#[derive(Serialize, Deserialize, Debug)]
-pub struct MemberRef {
-    pub guild: String,
-    pub user: String,
-}
-
-#[derive(Serialize, Deserialize, Debug)]
-pub struct Member {
-    #[serde(rename = "_id")]
-    pub id: MemberRef,
-    pub nickname: Option<String>,
-}
-
-#[derive(Serialize, Deserialize, Debug)]
-pub struct Invite {
-    pub code: String,
-    pub creator: String,
-    pub channel: String,
-}
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct Ban {
-    pub id: String,
-    pub reason: String,
-}
-
-#[derive(Serialize, Deserialize, Debug)]
-pub struct Guild {
-    #[serde(rename = "_id")]
-    pub id: String,
-    // pub nonce: String, used internally
-    pub name: String,
-    pub description: String,
-    pub owner: String,
-
-    pub invites: Vec<Invite>,
-    pub bans: Vec<Ban>,
-
-    pub default_permissions: u32,
-}

src/database/message.rs

@@ -1,89 +0,0 @@
-use super::get_collection;
-use crate::guards::channel::ChannelRef;
-use crate::notifications;
-use crate::notifications::events::message::Create;
-use crate::notifications::events::Notification;
-use crate::routes::channel::ChannelType;
-
-use bson::{doc, to_bson, UtcDateTime};
-use serde::{Deserialize, Serialize};
-
-#[derive(Serialize, Deserialize, Debug)]
-pub struct PreviousEntry {
-    pub content: String,
-    pub time: UtcDateTime,
-}
-
-#[derive(Serialize, Deserialize, Debug)]
-pub struct Message {
-    #[serde(rename = "_id")]
-    pub id: String,
-    pub nonce: Option<String>,
-    pub channel: String,
-    pub author: String,
-
-    pub content: String,
-    pub edited: Option<UtcDateTime>,
-
-    pub previous_content: Vec<PreviousEntry>,
-}
-
-// ? TODO: write global send message
-// ? pub fn send_message();
-// ? handle websockets?
-impl Message {
-    pub fn send(&self, target: &ChannelRef) -> bool {
-        if get_collection("messages")
-            .insert_one(to_bson(&self).unwrap().as_document().unwrap().clone(), None)
-            .is_ok()
-        {
-            notifications::send_message_given_channel(
-                Notification::message_create(Create {
-                    id: self.id.clone(),
-                    nonce: self.nonce.clone(),
-                    channel: self.channel.clone(),
-                    author: self.author.clone(),
-                    content: self.content.clone(),
-                }),
-                &target,
-            );
-
-            let short_content: String = self.content.chars().take(24).collect();
-
-            // !! this stuff can be async
-            if target.channel_type == ChannelType::DM as u8
-                || target.channel_type == ChannelType::GROUPDM as u8
-            {
-                let mut update = doc! {
-                    "$set": {
-                        "last_message": {
-                            "id": &self.id,
-                            "user_id": &self.author,
-                            "short_content": short_content,
-                        }
-                    }
-                };
-
-                if target.channel_type == ChannelType::DM as u8 {
-                    update
-                        .get_document_mut("$set")
-                        .unwrap()
-                        .insert("active", true);
-                }
-
-                if get_collection("channels")
-                    .update_one(doc! { "_id": &target.id }, update, None)
-                    .is_ok()
-                {
-                    true
-                } else {
-                    false
-                }
-            } else {
-                true
-            }
-        } else {
-            false
-        }
-    }
-}

src/database/migrations/init.rs

@@ -0,0 +1,137 @@
+use super::super::get_db;
+use super::scripts::LATEST_REVISION;
+
+use log::info;
+use mongodb::bson::doc;
+use mongodb::options::CreateCollectionOptions;
+
+pub async fn create_database() {
+    info!("Creating database.");
+    let db = get_db();
+
+    db.create_collection("accounts", None)
+        .await
+        .expect("Failed to create accounts collection.");
+
+    db.create_collection("users", None)
+        .await
+        .expect("Failed to create users collection.");
+
+    db.create_collection("channels", None)
+        .await
+        .expect("Failed to create channels collection.");
+
+    db.create_collection("messages", None)
+        .await
+        .expect("Failed to create messages collection.");
+
+    db.create_collection("servers", None)
+        .await
+        .expect("Failed to create servers collection.");
+
+    db.create_collection("server_members", None)
+        .await
+        .expect("Failed to create server_members collection.");
+
+    db.create_collection("server_bans", None)
+        .await
+        .expect("Failed to create server_bans collection.");
+
+    db.create_collection("channel_invites", None)
+        .await
+        .expect("Failed to create channel_invites collection.");
+
+    db.create_collection("channel_unreads", None)
+        .await
+        .expect("Failed to create channel_unreads collection.");
+
+    db.create_collection("migrations", None)
+        .await
+        .expect("Failed to create migrations collection.");
+
+    db.create_collection("attachments", None)
+        .await
+        .expect("Failed to create attachments collection.");
+
+    db.create_collection("user_settings", None)
+        .await
+        .expect("Failed to create user_settings collection.");
+
+    db.create_collection(
+        "pubsub",
+        CreateCollectionOptions::builder()
+            .capped(true)
+            .size(1_000_000)
+            .build(),
+    )
+    .await
+    .expect("Failed to create pubsub collection.");
+
+    db.run_command(
+        doc! {
+            "createIndexes": "accounts",
+            "indexes": [
+                {
+                    "key": {
+                        "email": 1
+                    },
+                    "name": "email",
+                    "unique": true,
+                    "collation": {
+                        "locale": "en",
+                        "strength": 2
+                    }
+                },
+                {
+                    "key": {
+                        "email_normalised": 1
+                    },
+                    "name": "email_normalised",
+                    "unique": true,
+                    "collation": {
+                        "locale": "en",
+                        "strength": 2
+                    }
+                }
+            ]
+        },
+        None,
+    )
+    .await
+    .expect("Failed to create account index.");
+
+    db.run_command(
+        doc! {
+            "createIndexes": "users",
+            "indexes": [
+                {
+                    "key": {
+                        "username": 1
+                    },
+                    "name": "username",
+                    "unique": true,
+                    "collation": {
+                        "locale": "en",
+                        "strength": 2
+                    }
+                }
+            ]
+        },
+        None,
+    )
+    .await
+    .expect("Failed to create username index.");
+
+    db.collection("migrations")
+        .insert_one(
+            doc! {
+                "_id": 0,
+                "revision": LATEST_REVISION
+            },
+            None,
+        )
+        .await
+        .expect("Failed to save migration info.");
+
+    info!("Created database.");
+}

src/database/migrations/mod.rs

@@ -0,0 +1,19 @@
+use super::get_connection;
+
+pub mod init;
+pub mod scripts;
+
+pub async fn run_migrations() {
+    let client = get_connection();
+
+    let list = client
+        .list_database_names(None, None)
+        .await
+        .expect("Failed to fetch database names.");
+
+    if list.iter().position(|x| x == "revolt").is_none() {
+        init::create_database().await;
+    } else {
+        scripts::migrate_database().await;
+    }
+}

src/database/migrations/scripts.rs

@@ -0,0 +1,162 @@
+use crate::database::{get_collection, get_db};
+
+use futures::StreamExt;
+use log::info;
+use mongodb::{
+    bson::{doc, from_document},
+    options::FindOptions,
+};
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize)]
+struct MigrationInfo {
+    _id: i32,
+    revision: i32,
+}
+
+pub const LATEST_REVISION: i32 = 5;
+
+pub async fn migrate_database() {
+    let migrations = get_collection("migrations");
+    let data = migrations
+        .find_one(None, None)
+        .await
+        .expect("Failed to fetch migration data.");
+
+    if let Some(doc) = data {
+        let info: MigrationInfo =
+            from_document(doc).expect("Failed to read migration information.");
+
+        let revision = run_migrations(info.revision).await;
+
+        migrations
+            .update_one(
+                doc! {
+                    "_id": info._id
+                },
+                doc! {
+                    "$set": {
+                        "revision": revision
+                    }
+                },
+                None,
+            )
+            .await
+            .expect("Failed to commit migration information.");
+
+        info!("Migration complete. Currently at revision {}.", revision);
+    } else {
+        panic!("Database was configured incorrectly, possibly because initalization failed.")
+    }
+}
+
+pub async fn run_migrations(revision: i32) -> i32 {
+    info!("Starting database migration.");
+
+    if revision <= 0 {
+        info!("Running migration [revision 0]: Test migration system.");
+    }
+
+    if revision <= 1 {
+        info!("Running migration [revision 1 / 2021-04-24]: Migrate to Autumn v1.0.0.");
+
+        let messages = get_collection("messages");
+        let attachments = get_collection("attachments");
+
+        messages
+            .update_many(
+                doc! { "attachment": { "$exists": 1 } },
+                doc! { "$set": { "attachment.tag": "attachments", "attachment.size": 0 } },
+                None,
+            )
+            .await
+            .expect("Failed to update messages.");
+
+        attachments
+            .update_many(
+                doc! {},
+                doc! { "$set": { "tag": "attachments", "size": 0 } },
+                None,
+            )
+            .await
+            .expect("Failed to update attachments.");
+    }
+
+    if revision <= 2 {
+        info!("Running migration [revision 2 / 2021-05-08]: Add servers collection.");
+
+        get_db()
+            .create_collection("servers", None)
+            .await
+            .expect("Failed to create servers collection.");
+    }
+
+    if revision <= 3 {
+        info!("Running migration [revision 3 / 2021-05-25]: Support multiple file uploads, add channel_unreads and user_settings.");
+
+        let messages = get_collection("messages");
+        let mut cursor = messages
+            .find(
+                doc! {
+                    "attachment": {
+                        "$exists": 1
+                    }
+                },
+                FindOptions::builder()
+                    .projection(doc! {
+                        "_id": 1,
+                        "attachments": [ "$attachment" ]
+                    })
+                    .build(),
+            )
+            .await
+            .expect("Failed to fetch messages.");
+
+        while let Some(result) = cursor.next().await {
+            let doc = result.unwrap();
+            let id = doc.get_str("_id").unwrap();
+            let attachments = doc.get_array("attachments").unwrap();
+
+            messages
+                .update_one(
+                    doc! { "_id": id },
+                    doc! { "$unset": { "attachment": 1 }, "$set": { "attachments": attachments } },
+                    None,
+                )
+                .await
+                .unwrap();
+        }
+
+        get_db()
+            .create_collection("channel_unreads", None)
+            .await
+            .expect("Failed to create channel_unreads collection.");
+
+        get_db()
+            .create_collection("user_settings", None)
+            .await
+            .expect("Failed to create user_settings collection.");
+    }
+
+    if revision <= 4 {
+        info!("Running migration [revision 4 / 2021-06-01]: Add more server collections.");
+
+        get_db()
+            .create_collection("server_members", None)
+            .await
+            .expect("Failed to create server_members collection.");
+
+        get_db()
+            .create_collection("server_bans", None)
+            .await
+            .expect("Failed to create server_bans collection.");
+
+        get_db()
+            .create_collection("channel_invites", None)
+            .await
+            .expect("Failed to create channel_invites collection.");
+    }
+
+    // Reminder to update LATEST_REVISION when adding new migrations.
+    LATEST_REVISION
+}

src/database/mod.rs

@@ -1,15 +1,17 @@
-use mongodb::{Client, Collection, Database};
-use std::env;
+use crate::util::variables::MONGO_URI;
 
+use mongodb::{Client, Collection, Database};
 use once_cell::sync::OnceCell;
+
 static DBCONN: OnceCell<Client> = OnceCell::new();
 
-pub fn connect() {
-    let client =
-        Client::with_uri_str(&env::var("DB_URI").expect("DB_URI not in environment variables!"))
-            .expect("Failed to init db connection.");
+pub async fn connect() {
+    let client = Client::with_uri_str(&MONGO_URI)
+        .await
+        .expect("Failed to init db connection.");
 
     DBCONN.set(client).unwrap();
+    migrations::run_migrations().await;
 }
 
 pub fn get_connection() -> &'static Client {
@@ -24,11 +26,11 @@ pub fn get_collection(collection: &str) -> Collection {
     get_db().collection(collection)
 }
 
-pub mod channel;
-pub mod guild;
-pub mod message;
-pub mod mutual;
+pub mod entities;
+pub mod guards;
+pub mod migrations;
 pub mod permissions;
-pub mod user;
 
+pub use entities::*;
+pub use guards::*;
 pub use permissions::*;

src/database/mutual.rs

@@ -1,131 +0,0 @@
-use super::{get_collection, MemberPermissions};
-
-use bson::doc;
-use mongodb::options::FindOptions;
-
-pub fn find_mutual_guilds(user_id: &str, target_id: &str) -> Vec<String> {
-    let col = get_collection("members");
-    if let Ok(result) = col.find(
-        doc! {
-            "$and": [
-                { "id": user_id   },
-                { "id": target_id },
-            ]
-        },
-        FindOptions::builder().projection(doc! { "_id": 1 }).build(),
-    ) {
-        let mut results = vec![];
-
-        for doc in result {
-            if let Ok(guild) = doc {
-                results.push(guild.get_str("_id").unwrap().to_string());
-            }
-        }
-
-        results
-    } else {
-        vec![]
-    }
-}
-
-pub fn find_mutual_friends(user_id: &str, target_id: &str) -> Vec<String> {
-    let col = get_collection("users");
-    if let Ok(result) = col.find(
-        doc! {
-            "$and": [
-                { "relations": { "$elemMatch": { "id": user_id,   "status": 0 } } },
-                { "relations": { "$elemMatch": { "id": target_id, "status": 0 } } },
-            ]
-        },
-        FindOptions::builder().projection(doc! { "_id": 1 }).build(),
-    ) {
-        let mut results = vec![];
-
-        for doc in result {
-            if let Ok(user) = doc {
-                results.push(user.get_str("_id").unwrap().to_string());
-            }
-        }
-
-        results
-    } else {
-        vec![]
-    }
-}
-
-pub fn find_mutual_groups(user_id: &str, target_id: &str) -> Vec<String> {
-    let col = get_collection("channels");
-    if let Ok(result) = col.find(
-        doc! {
-            "type": 1,
-            "$and": [
-                { "recipients": user_id },
-                { "recipients": target_id },
-            ]
-        },
-        FindOptions::builder().projection(doc! { "_id": 1 }).build(),
-    ) {
-        let mut results = vec![];
-
-        for doc in result {
-            if let Ok(group) = doc {
-                results.push(group.get_str("_id").unwrap().to_string());
-            }
-        }
-
-        results
-    } else {
-        vec![]
-    }
-}
-
-pub fn has_mutual_connection(user_id: &str, target_id: &str, with_permission: bool) -> bool {
-    let mut doc = doc! { "_id": 1 };
-
-    if with_permission {
-        doc.insert("default_permissions", 1);
-    }
-
-    let opt = FindOptions::builder().projection(doc);
-
-    if let Ok(result) = get_collection("guilds").find(
-        doc! {
-            "$and": [
-                { "members": { "$elemMatch": { "id": user_id   } } },
-                { "members": { "$elemMatch": { "id": target_id } } },
-            ]
-        },
-        if with_permission {
-            opt.build()
-        } else {
-            opt.limit(1).build()
-        },
-    ) {
-        if with_permission {
-            for item in result {
-                // ? logic should match permissions.rs#calculate
-                if let Ok(guild) = item {
-                    if guild.get_str("owner").unwrap() == user_id {
-                        return true;
-                    }
-
-                    let permissions = guild.get_i32("default_permissions").unwrap() as u32;
-
-                    if MemberPermissions([permissions]).get_send_direct_messages() {
-                        return true;
-                    }
-                }
-            }
-
-            false
-        } else {
-            if result.count() > 0 {
-                true
-            } else {
-                false
-            }
-        }
-    } else {
-        false
-    }
-}

src/database/permissions.rs

@@ -1,217 +0,0 @@
-use super::mutual::has_mutual_connection;
-use crate::database::guild::Member;
-use crate::database::user::UserRelationship;
-use crate::guards::auth::UserRef;
-use crate::guards::channel::ChannelRef;
-use crate::guards::guild::{get_member, GuildRef};
-
-use num_enum::TryFromPrimitive;
-
-#[derive(Debug, PartialEq, Eq, TryFromPrimitive)]
-#[repr(u8)]
-pub enum Relationship {
-    Friend = 0,
-    Outgoing = 1,
-    Incoming = 2,
-    Blocked = 3,
-    BlockedOther = 4,
-    NONE = 5,
-    SELF = 6,
-}
-
-#[derive(Debug, PartialEq, Eq, TryFromPrimitive, Copy, Clone)]
-#[repr(u32)]
-pub enum Permission {
-    Access = 1,
-    CreateInvite = 2,
-    KickMembers = 4,
-    BanMembers = 8,
-    ReadMessages = 16,
-    SendMessages = 32,
-    ManageMessages = 64,
-    ManageChannels = 128,
-    ManageServer = 256,
-    ManageRoles = 512,
-    SendDirectMessages = 1024,
-}
-
-bitfield! {
-    pub struct MemberPermissions(MSB0 [u32]);
-    u32;
-    pub get_access, set_access: 31;
-    pub get_create_invite, set_create_invite: 30;
-    pub get_kick_members, set_kick_members: 29;
-    pub get_ban_members, set_ban_members: 28;
-    pub get_read_messages, set_read_messages: 27;
-    pub get_send_messages, set_send_messages: 26;
-    pub get_manage_messages, set_manage_messages: 25;
-    pub get_manage_channels, set_manage_channels: 24;
-    pub get_manage_server, set_manage_server: 23;
-    pub get_manage_roles, set_manage_roles: 22;
-    pub get_send_direct_messages, set_send_direct_messages: 21;
-}
-
-pub fn get_relationship_internal(
-    user_id: &str,
-    target_id: &str,
-    relationships: &Option<Vec<UserRelationship>>,
-) -> Relationship {
-    if user_id == target_id {
-        return Relationship::SELF;
-    }
-
-    if let Some(arr) = &relationships {
-        for entry in arr {
-            if entry.id == target_id {
-                match entry.status {
-                    0 => return Relationship::Friend,
-                    1 => return Relationship::Outgoing,
-                    2 => return Relationship::Incoming,
-                    3 => return Relationship::Blocked,
-                    4 => return Relationship::BlockedOther,
-                    _ => return Relationship::NONE,
-                }
-            }
-        }
-    }
-
-    Relationship::NONE
-}
-
-pub fn get_relationship(a: &UserRef, b: &UserRef) -> Relationship {
-    if a.id == b.id {
-        return Relationship::SELF;
-    }
-
-    get_relationship_internal(&a.id, &b.id, &a.fetch_relationships())
-}
-
-pub struct PermissionCalculator {
-    pub user: UserRef,
-    pub channel: Option<ChannelRef>,
-    pub guild: Option<GuildRef>,
-    pub member: Option<Member>,
-}
-
-impl PermissionCalculator {
-    pub fn new(user: UserRef) -> PermissionCalculator {
-        PermissionCalculator {
-            user,
-            channel: None,
-            guild: None,
-            member: None,
-        }
-    }
-
-    pub fn channel(self, channel: ChannelRef) -> PermissionCalculator {
-        PermissionCalculator {
-            channel: Some(channel),
-            ..self
-        }
-    }
-
-    pub fn guild(self, guild: GuildRef) -> PermissionCalculator {
-        PermissionCalculator {
-            guild: Some(guild),
-            ..self
-        }
-    }
-
-    pub fn fetch_data(mut self) -> PermissionCalculator {
-        let guild = if let Some(value) = self.guild {
-            Some(value)
-        } else if let Some(channel) = &self.channel {
-            match channel.channel_type {
-                0..=1 => None,
-                2 => {
-                    if let Some(id) = &channel.guild {
-                        GuildRef::from(id.clone())
-                    } else {
-                        None
-                    }
-                }
-                _ => None,
-            }
-        } else {
-            None
-        };
-
-        if let Some(guild) = &guild {
-            self.member = get_member(&guild.id, &self.user.id);
-        }
-
-        self.guild = guild;
-        self
-    }
-
-    pub fn calculate(&self) -> u32 {
-        let mut permissions: u32 = 0;
-        if let Some(guild) = &self.guild {
-            if let Some(_member) = &self.member {
-                // ? logic should match mutual.rs#has_mutual_connection
-                if guild.owner == self.user.id {
-                    return u32::MAX;
-                }
-
-                permissions = guild.default_permissions as u32;
-            }
-        }
-
-        if let Some(channel) = &self.channel {
-            match channel.channel_type {
-                0 => {
-                    if let Some(arr) = &channel.recipients {
-                        let mut other_user = "";
-                        for item in arr {
-                            if item != &self.user.id {
-                                other_user = item;
-                            }
-                        }
-
-                        let relationships = self.user.fetch_relationships();
-                        let relationship =
-                            get_relationship_internal(&self.user.id, &other_user, &relationships);
-
-                        if relationship == Relationship::Friend {
-                            permissions = 177;
-                        } else if relationship == Relationship::Blocked
-                            || relationship == Relationship::BlockedOther
-                        {
-                            permissions = 1;
-                        } else if has_mutual_connection(&self.user.id, other_user, true) {
-                            permissions = 177;
-                        } else {
-                            permissions = 1;
-                        }
-                    }
-                }
-                1 => {
-                    if let Some(id) = &channel.owner {
-                        if &self.user.id == id {
-                            return u32::MAX;
-                        }
-                    }
-
-                    if let Some(arr) = &channel.recipients {
-                        for item in arr {
-                            if item == &self.user.id {
-                                permissions = 177;
-                                break;
-                            }
-                        }
-                    }
-                }
-                2 => {
-                    // nothing implemented yet
-                }
-                _ => {}
-            }
-        }
-
-        permissions
-    }
-
-    pub fn as_permission(&self) -> MemberPermissions<[u32; 1]> {
-        MemberPermissions([self.calculate()])
-    }
-}

src/database/permissions/channel.rs

@@ -0,0 +1,104 @@
+use crate::database::*;
+use crate::util::result::Result;
+
+use super::PermissionCalculator;
+
+use num_enum::TryFromPrimitive;
+use std::ops;
+
+#[derive(Debug, PartialEq, Eq, TryFromPrimitive, Copy, Clone)]
+#[repr(u32)]
+pub enum ChannelPermission {
+    View = 0b00000000000000000000000000000001,           // 1
+    SendMessage = 0b00000000000000000000000000000010,    // 2
+    ManageMessages = 0b00000000000000000000000000000100, // 4
+    ManageChannel = 0b00000000000000000000000000001000,  // 8
+    VoiceCall = 0b00000000000000000000000000010000,      // 16
+    InviteOthers = 0b00000000000000000000000000100000,   // 32
+}
+
+impl_op_ex!(+ |a: &ChannelPermission, b: &ChannelPermission| -> u32 { *a as u32 | *b as u32 });
+impl_op_ex_commutative!(+ |a: &u32, b: &ChannelPermission| -> u32 { *a | *b as u32 });
+
+bitfield! {
+    pub struct ChannelPermissions(MSB0 [u32]);
+    u32;
+    pub get_view, _: 31;
+    pub get_send_message, _: 30;
+    pub get_manage_messages, _: 29;
+    pub get_manage_channel, _: 28;
+    pub get_voice_call, _: 27;
+    pub get_invite_others, _: 26;
+}
+
+impl<'a> PermissionCalculator<'a> {
+    pub async fn calculate_channel(self) -> Result<u32> {
+        let channel = if let Some(channel) = self.channel {
+            channel
+        } else {
+            unreachable!()
+        };
+
+        match channel {
+            Channel::SavedMessages { user: owner, .. } => {
+                if &self.perspective.id == owner {
+                    Ok(u32::MAX)
+                } else {
+                    Ok(0)
+                }
+            }
+            Channel::DirectMessage { recipients, .. } => {
+                if recipients
+                    .iter()
+                    .find(|x| *x == &self.perspective.id)
+                    .is_some()
+                {
+                    if let Some(recipient) = recipients.iter().find(|x| *x != &self.perspective.id)
+                    {
+                        let perms = self.for_user(recipient).await?;
+
+                        if perms.get_send_message() {
+                            return Ok(ChannelPermission::View
+                                + ChannelPermission::SendMessage
+                                + ChannelPermission::VoiceCall);
+                        }
+
+                        return Ok(ChannelPermission::View as u32);
+                    }
+                }
+
+                Ok(0)
+            }
+            Channel::Group { recipients, .. } => {
+                if recipients
+                    .iter()
+                    .find(|x| *x == &self.perspective.id)
+                    .is_some()
+                {
+                    Ok(ChannelPermission::View
+                        + ChannelPermission::SendMessage
+                        + ChannelPermission::ManageChannel
+                        + ChannelPermission::VoiceCall
+                        + ChannelPermission::InviteOthers)
+                } else {
+                    Ok(0)
+                }
+            }
+            Channel::TextChannel { server, .. } => {
+                let server = Ref::from_unchecked(server.clone()).fetch_server().await?;
+
+                if self.perspective.id == server.owner {
+                    Ok(u32::MAX)
+                } else {
+                    Ok(ChannelPermission::View
+                        + ChannelPermission::SendMessage
+                        + ChannelPermission::InviteOthers)
+                }
+            }
+        }
+    }
+
+    pub async fn for_channel(self) -> Result<ChannelPermissions<[u32; 1]>> {
+        Ok(ChannelPermissions([self.calculate_channel().await?]))
+    }
+}

src/database/permissions/mod.rs

@@ -0,0 +1,68 @@
+pub use crate::database::*;
+
+pub mod channel;
+pub mod server;
+pub mod user;
+
+pub use user::get_relationship;
+
+pub struct PermissionCalculator<'a> {
+    perspective: &'a User,
+
+    user: Option<&'a User>,
+    relationship: Option<&'a RelationshipStatus>,
+    channel: Option<&'a Channel>,
+    server: Option<&'a Server>,
+
+    has_mutual_connection: bool,
+}
+
+impl<'a> PermissionCalculator<'a> {
+    pub fn new(perspective: &'a User) -> PermissionCalculator {
+        PermissionCalculator {
+            perspective,
+
+            user: None,
+            relationship: None,
+            channel: None,
+            server: None,
+
+            has_mutual_connection: false,
+        }
+    }
+
+    pub fn with_user(self, user: &'a User) -> PermissionCalculator {
+        PermissionCalculator {
+            user: Some(&user),
+            ..self
+        }
+    }
+
+    pub fn with_relationship(self, relationship: &'a RelationshipStatus) -> PermissionCalculator {
+        PermissionCalculator {
+            relationship: Some(&relationship),
+            ..self
+        }
+    }
+
+    pub fn with_channel(self, channel: &'a Channel) -> PermissionCalculator {
+        PermissionCalculator {
+            channel: Some(&channel),
+            ..self
+        }
+    }
+
+    pub fn with_server(self, server: &'a Server) -> PermissionCalculator {
+        PermissionCalculator {
+            server: Some(&server),
+            ..self
+        }
+    }
+
+    pub fn with_mutual_connection(self) -> PermissionCalculator<'a> {
+        PermissionCalculator {
+            has_mutual_connection: true,
+            ..self
+        }
+    }
+}

src/database/permissions/server.rs

@@ -0,0 +1,64 @@
+use crate::util::result::Result;
+
+use super::PermissionCalculator;
+
+use num_enum::TryFromPrimitive;
+use std::ops;
+
+#[derive(Debug, PartialEq, Eq, TryFromPrimitive, Copy, Clone)]
+#[repr(u32)]
+pub enum ServerPermission {
+    View = 0b00000000000000000000000000000001,           // 1
+    ManageRoles = 0b00000000000000000000000000000010,    // 2
+    ManageChannels = 0b00000000000000000000000000000100, // 4
+    ManageServer = 0b00000000000000000000000000001000,   // 8
+    KickMembers = 0b00000000000000000000000000010000,    // 16
+    BanMembers = 0b00000000000000000000000000100000,     // 32
+    // 6 bits of space
+    ChangeNickname = 0b00000000000000000001000000000000, // 4096
+    ManageNicknames = 0b00000000000000000010000000000000, // 8192
+    ChangeAvatar = 0b00000000000000000100000000000000,   // 16392
+    RemoveAvatars = 0b00000000000000001000000000000000,  // 32784
+                                                         // 16 bits of space
+}
+
+impl_op_ex!(+ |a: &ServerPermission, b: &ServerPermission| -> u32 { *a as u32 | *b as u32 });
+impl_op_ex_commutative!(+ |a: &u32, b: &ServerPermission| -> u32 { *a | *b as u32 });
+
+bitfield! {
+    pub struct ServerPermissions(MSB0 [u32]);
+    u32;
+    pub get_view, _: 31;
+    pub get_manage_members, _: 30;
+    pub get_manage_channels, _: 29;
+    pub get_manage_server, _: 28;
+    pub get_kick_members, _: 27;
+    pub get_ban_members, _: 26;
+
+    pub get_change_nickname, _: 19;
+    pub get_manage_nicknames, _: 18;
+    pub get_change_avatar, _: 17;
+    pub get_remove_avatars, _: 16;
+}
+
+impl<'a> PermissionCalculator<'a> {
+    pub async fn calculate_server(self) -> Result<u32> {
+        let server = if let Some(server) = self.server {
+            server
+        } else {
+            unreachable!()
+        };
+
+        if self.perspective.id == server.owner {
+            Ok(u32::MAX)
+        } else {
+            Ok(ServerPermission::View
+                + ServerPermission::ChangeNickname
+                + ServerPermission::ChangeAvatar)
+        }
+    }
+
+    pub async fn for_server(self) -> Result<ServerPermissions<[u32; 1]>> {
+        Ok(ServerPermissions([self.calculate_server().await?]))
+    }
+}

src/database/permissions/user.rs

@@ -0,0 +1,107 @@
+use crate::database::*;
+use crate::util::result::{Error, Result};
+
+use super::PermissionCalculator;
+
+use mongodb::bson::doc;
+use num_enum::TryFromPrimitive;
+use std::ops;
+
+#[derive(Debug, PartialEq, Eq, TryFromPrimitive, Copy, Clone)]
+#[repr(u32)]
+pub enum UserPermission {
+    Access = 0b00000000000000000000000000000001,      // 1
+    ViewProfile = 0b00000000000000000000000000000010, // 2
+    SendMessage = 0b00000000000000000000000000000100, // 4
+    Invite = 0b00000000000000000000000000001000,      // 8
+}
+
+bitfield! {
+    pub struct UserPermissions(MSB0 [u32]);
+    u32;
+    pub get_access, _: 31;
+    pub get_view_profile, _: 30;
+    pub get_send_message, _: 29;
+    pub get_invite, _: 28;
+}
+
+impl_op_ex!(+ |a: &UserPermission, b: &UserPermission| -> u32 { *a as u32 | *b as u32 });
+impl_op_ex_commutative!(+ |a: &u32, b: &UserPermission| -> u32 { *a | *b as u32 });
+
+pub fn get_relationship(a: &User, b: &str) -> RelationshipStatus {
+    if a.id == b {
+        return RelationshipStatus::User;
+    }
+
+    if let Some(relations) = &a.relations {
+        if let Some(relationship) = relations.iter().find(|x| x.id == b) {
+            return relationship.status.clone();
+        }
+    }
+
+    RelationshipStatus::None
+}
+
+impl<'a> PermissionCalculator<'a> {
+    pub async fn calculate_user(self, target: &str) -> Result<u32> {
+        if &self.perspective.id == target {
+            return Ok(u32::MAX);
+        }
+
+        let mut permissions: u32 = 0;
+        match self
+            .relationship
+            .clone()
+            .map(|v| v.to_owned())
+            .unwrap_or_else(|| get_relationship(&self.perspective, &target))
+        {
+            RelationshipStatus::Friend | RelationshipStatus::User => return Ok(u32::MAX),
+            RelationshipStatus::Blocked | RelationshipStatus::BlockedOther => {
+                return Ok(UserPermission::Access as u32)
+            }
+            RelationshipStatus::Incoming | RelationshipStatus::Outgoing => {
+                permissions = UserPermission::Access as u32;
+                // ! INFO: if we add boolean switch for permission to
+                // ! message people who have mutual, we need to get
+                // ! rid of this return statement.
+                // return Ok(permissions);
+            }
+            _ => {}
+        }
+
+        if self.has_mutual_connection
+            || get_collection("channels")
+                .find_one(
+                    doc! {
+                        "channel_type": {
+                            "$in": ["Group", "DirectMessage"]
+                        },
+                        "recipients": {
+                            "$all": [ &self.perspective.id, target ]
+                        }
+                    },
+                    None,
+                )
+                .await
+                .map_err(|_| Error::DatabaseError {
+                    operation: "find",
+                    with: "channels",
+                })?
+                .is_some()
+        {
+            // ! FIXME: add privacy settings
+            return Ok(UserPermission::Access + UserPermission::ViewProfile);
+        }
+
+        Ok(permissions)
+    }
+
+    pub async fn for_user(self, target: &str) -> Result<UserPermissions<[u32; 1]>> {
+        Ok(UserPermissions([self.calculate_user(&target).await?]))
+    }
+
+    pub async fn for_user_given(self) -> Result<UserPermissions<[u32; 1]>> {
+        let id = &self.user.unwrap().id;
+        Ok(UserPermissions([self.calculate_user(&id).await?]))
+    }
+}

src/database/user.rs

@@ -1,29 +0,0 @@
-use bson::UtcDateTime;
-use serde::{Deserialize, Serialize};
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct UserEmailVerification {
-    pub verified: bool,
-    pub target: Option<String>,
-    pub expiry: Option<UtcDateTime>,
-    pub rate_limit: Option<UtcDateTime>,
-    pub code: Option<String>,
-}
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct UserRelationship {
-    pub id: String,
-    pub status: u8,
-}
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct User {
-    #[serde(rename = "_id")]
-    pub id: String,
-    pub email: String,
-    pub username: String,
-    pub password: String,
-    pub access_token: Option<String>,
-    pub email_verification: UserEmailVerification,
-    pub relations: Option<Vec<UserRelationship>>,
-}

src/email.rs

@@ -1,50 +0,0 @@
-use reqwest::blocking::Client;
-use std::collections::HashMap;
-use std::env;
-
-pub fn send_email(target: String, subject: String, body: String, html: String) -> Result<(), ()> {
-    let mut map = HashMap::new();
-    map.insert("target", target.clone());
-    map.insert("subject", subject);
-    map.insert("body", body);
-    map.insert("html", html);
-
-    let client = Client::new();
-    match client
-        .post("http://192.168.0.26:3838/send")
-        .json(&map)
-        .send()
-    {
-        Ok(_) => Ok(()),
-        Err(_) => Err(()),
-    }
-}
-
-fn public_uri() -> String {
-    env::var("PUBLIC_URI").expect("PUBLIC_URI not in environment variables!")
-}
-
-pub fn send_verification_email(email: String, code: String) -> bool {
-    let url = format!("{}/api/account/verify/{}", public_uri(), code);
-    send_email(
-        email,
-        "Verify your email!".to_string(),
-        format!("Verify your email here: {}", url),
-        format!("<a href=\"{}\">Click to verify your email!</a>", url),
-    )
-    .is_ok()
-}
-
-pub fn send_welcome_email(email: String, username: String) -> bool {
-    send_email(
-        email,
-        "Welcome to REVOLT!".to_string(),
-        format!("Welcome, {}! You can now use REVOLT.", username.clone()),
-        format!(
-            "<b>Welcome, {}!</b><br/>You can now use REVOLT.<br/><a href=\"{}\">Go to REVOLT</a>",
-            username.clone(),
-            public_uri()
-        ),
-    )
-    .is_ok()
-}

src/guards/auth.rs

@@ -1,162 +0,0 @@
-use bson::{doc, from_bson, Document};
-use mongodb::options::FindOneOptions;
-use rocket::http::{RawStr, Status};
-use rocket::request::{self, FromParam, FromRequest, Request};
-use rocket::Outcome;
-use serde::{Deserialize, Serialize};
-
-use crate::database;
-use database::user::{User, UserRelationship};
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct UserRef {
-    pub id: String,
-    pub username: String,
-    pub email_verified: bool,
-}
-
-impl UserRef {
-    pub fn from(id: String) -> Option<UserRef> {
-        match database::get_collection("users").find_one(
-            doc! { "_id": id },
-            FindOneOptions::builder()
-                .projection(doc! {
-                    "_id": 1,
-                    "username": 1,
-                    "email_verification.verified": 1,
-                })
-                .build(),
-        ) {
-            Ok(result) => match result {
-                Some(doc) => Some(UserRef {
-                    id: doc.get_str("_id").unwrap().to_string(),
-                    username: doc.get_str("username").unwrap().to_string(),
-                    email_verified: doc
-                        .get_document("email_verification")
-                        .unwrap()
-                        .get_bool("verified")
-                        .unwrap(),
-                }),
-                None => None,
-            },
-            Err(_) => None,
-        }
-    }
-
-    pub fn fetch_data(&self, projection: Document) -> Option<Document> {
-        database::get_collection("users")
-            .find_one(
-                doc! { "_id": &self.id },
-                FindOneOptions::builder().projection(projection).build(),
-            )
-            .expect("Failed to fetch user from database.")
-    }
-
-    pub fn fetch_relationships(&self) -> Option<Vec<UserRelationship>> {
-        let user = database::get_collection("users")
-            .find_one(
-                doc! { "_id": &self.id },
-                FindOneOptions::builder()
-                    .projection(doc! { "relations": 1 })
-                    .build(),
-            )
-            .expect("Failed to fetch user relationships from database.")
-            .expect("Missing user document.");
-
-        if let Ok(arr) = user.get_array("relations") {
-            let mut relationships = vec![];
-            for item in arr {
-                relationships.push(from_bson(item.clone()).unwrap());
-            }
-
-            Some(relationships)
-        } else {
-            None
-        }
-    }
-}
-
-#[derive(Debug)]
-pub enum AuthError {
-    BadCount,
-    Missing,
-    Invalid,
-}
-
-impl<'a, 'r> FromRequest<'a, 'r> for UserRef {
-    type Error = AuthError;
-
-    fn from_request(request: &'a Request<'r>) -> request::Outcome<Self, Self::Error> {
-        let keys: Vec<_> = request.headers().get("x-auth-token").collect();
-        match keys.len() {
-            0 => Outcome::Failure((Status::Forbidden, AuthError::Missing)),
-            1 => {
-                let key = keys[0];
-                let result = database::get_collection("users")
-                    .find_one(
-                        doc! { "access_token": key },
-                        FindOneOptions::builder()
-                            .projection(doc! {
-                                "_id": 1,
-                                "username": 1,
-                                "email_verification.verified": 1,
-                            })
-                            .build(),
-                    )
-                    .unwrap();
-
-                if let Some(user) = result {
-                    Outcome::Success(UserRef {
-                        id: user.get_str("_id").unwrap().to_string(),
-                        username: user.get_str("username").unwrap().to_string(),
-                        email_verified: user
-                            .get_document("email_verification")
-                            .unwrap()
-                            .get_bool("verified")
-                            .unwrap(),
-                    })
-                } else {
-                    Outcome::Failure((Status::Forbidden, AuthError::Invalid))
-                }
-            }
-            _ => Outcome::Failure((Status::BadRequest, AuthError::BadCount)),
-        }
-    }
-}
-
-impl<'a, 'r> FromRequest<'a, 'r> for User {
-    type Error = AuthError;
-
-    fn from_request(request: &'a Request<'r>) -> request::Outcome<Self, Self::Error> {
-        let keys: Vec<_> = request.headers().get("x-auth-token").collect();
-        match keys.len() {
-            0 => Outcome::Failure((Status::Forbidden, AuthError::Missing)),
-            1 => {
-                let key = keys[0];
-                let col = database::get_collection("users");
-                let result = col.find_one(doc! { "access_token": key }, None).unwrap();
-
-                if let Some(user) = result {
-                    Outcome::Success(
-                        from_bson(bson::Bson::Document(user)).expect("Failed to unwrap user."),
-                    )
-                } else {
-                    Outcome::Failure((Status::Forbidden, AuthError::Invalid))
-                }
-            }
-            _ => Outcome::Failure((Status::BadRequest, AuthError::BadCount)),
-        }
-    }
-}
-
-impl<'r> FromParam<'r> for UserRef {
-    type Error = &'r RawStr;
-
-    fn from_param(param: &'r RawStr) -> Result<Self, Self::Error> {
-        if let Some(user) = UserRef::from(param.to_string()) {
-            Ok(user)
-        } else {
-            Err(param)
-        }
-    }
-}

src/guards/channel.rs

@@ -1,91 +0,0 @@
-use bson::{doc, from_bson, Document};
-use mongodb::options::FindOneOptions;
-use rocket::http::RawStr;
-use rocket::request::FromParam;
-use serde::{Deserialize, Serialize};
-
-use crate::database;
-
-use database::channel::LastMessage;
-use database::message::Message;
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct ChannelRef {
-    #[serde(rename = "_id")]
-    pub id: String,
-    #[serde(rename = "type")]
-    pub channel_type: u8,
-
-    pub name: Option<String>,
-    pub last_message: Option<LastMessage>,
-
-    // information required for permission calculations
-    pub recipients: Option<Vec<String>>,
-    pub guild: Option<String>,
-    pub owner: Option<String>,
-}
-
-impl ChannelRef {
-    pub fn from(id: String) -> Option<ChannelRef> {
-        match database::get_collection("channels").find_one(
-            doc! { "_id": id },
-            FindOneOptions::builder()
-                .projection(doc! {
-                    "_id": 1,
-                    "type": 1,
-                    "name": 1,
-                    "last_message": 1,
-                    "recipients": 1,
-                    "guild": 1,
-                    "owner": 1,
-                })
-                .build(),
-        ) {
-            Ok(result) => match result {
-                Some(doc) => {
-                    Some(from_bson(bson::Bson::Document(doc)).expect("Failed to unwrap channel."))
-                }
-                None => None,
-            },
-            Err(_) => None,
-        }
-    }
-
-    pub fn fetch_data(&self, projection: Document) -> Option<Document> {
-        database::get_collection("channels")
-            .find_one(
-                doc! { "_id": &self.id },
-                FindOneOptions::builder().projection(projection).build(),
-            )
-            .expect("Failed to fetch channel from database.")
-    }
-}
-
-impl<'r> FromParam<'r> for ChannelRef {
-    type Error = &'r RawStr;
-
-    fn from_param(param: &'r RawStr) -> Result<Self, Self::Error> {
-        if let Some(channel) = ChannelRef::from(param.to_string()) {
-            Ok(channel)
-        } else {
-            Err(param)
-        }
-    }
-}
-
-impl<'r> FromParam<'r> for Message {
-    type Error = &'r RawStr;
-
-    fn from_param(param: &'r RawStr) -> Result<Self, Self::Error> {
-        let col = database::get_collection("messages");
-        let result = col
-            .find_one(doc! { "_id": param.to_string() }, None)
-            .unwrap();
-
-        if let Some(message) = result {
-            Ok(from_bson(bson::Bson::Document(message)).expect("Failed to unwrap message."))
-        } else {
-            Err(param)
-        }
-    }
-}

src/guards/guild.rs

@@ -1,153 +0,0 @@
-use bson::{doc, from_bson, Bson, Document};
-use mongodb::options::FindOneOptions;
-use rocket::http::RawStr;
-use rocket::request::FromParam;
-use serde::{Deserialize, Serialize};
-
-use crate::database;
-use crate::database::guild::{Ban, Invite, Member};
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct GuildRef {
-    #[serde(rename = "_id")]
-    pub id: String,
-    pub name: String,
-    pub description: String,
-    pub owner: String,
-
-    pub bans: Vec<Ban>,
-
-    pub default_permissions: i32,
-}
-
-impl GuildRef {
-    pub fn from(id: String) -> Option<GuildRef> {
-        match database::get_collection("guilds").find_one(
-            doc! { "_id": id },
-            FindOneOptions::builder()
-                .projection(doc! {
-                    "name": 1,
-                    "description": 1,
-                    "owner": 1,
-                    "bans": 1,
-                    "default_permissions": 1
-                })
-                .build(),
-        ) {
-            Ok(result) => match result {
-                Some(doc) => {
-                    Some(from_bson(bson::Bson::Document(doc)).expect("Failed to unwrap guild."))
-                }
-                None => None,
-            },
-            Err(_) => None,
-        }
-    }
-
-    pub fn fetch_data(&self, projection: Document) -> Option<Document> {
-        database::get_collection("guilds")
-            .find_one(
-                doc! { "_id": &self.id },
-                FindOneOptions::builder().projection(projection).build(),
-            )
-            .expect("Failed to fetch guild from database.")
-    }
-
-    pub fn fetch_data_given(&self, mut filter: Document, projection: Document) -> Option<Document> {
-        filter.insert("_id", self.id.clone());
-        database::get_collection("guilds")
-            .find_one(
-                filter,
-                FindOneOptions::builder().projection(projection).build(),
-            )
-            .expect("Failed to fetch guild from database.")
-    }
-}
-
-impl<'r> FromParam<'r> for GuildRef {
-    type Error = &'r RawStr;
-
-    fn from_param(param: &'r RawStr) -> Result<Self, Self::Error> {
-        if let Some(guild) = GuildRef::from(param.to_string()) {
-            Ok(guild)
-        } else {
-            Err(param)
-        }
-    }
-}
-
-pub fn get_member(guild_id: &String, member: &String) -> Option<Member> {
-    if let Ok(result) = database::get_collection("members").find_one(
-        doc! {
-            "_id.guild": &guild_id,
-            "_id.user": &member,
-        },
-        None,
-    ) {
-        if let Some(doc) = result {
-            Some(from_bson(Bson::Document(doc)).expect("Failed to unwrap member."))
-        } else {
-            None
-        }
-    } else {
-        None
-    }
-}
-
-pub fn get_invite<U: Into<Option<String>>>(
-    code: &String,
-    user: U,
-) -> Option<(String, String, Invite)> {
-    let mut doc = doc! {
-        "invites": {
-            "$elemMatch": {
-                "code": &code
-            }
-        }
-    };
-
-    if let Some(user_id) = user.into() {
-        doc.insert(
-            "bans",
-            doc! {
-                "$not": {
-                    "$elemMatch": {
-                        "id": user_id
-                    }
-                }
-            },
-        );
-    }
-
-    if let Ok(result) = database::get_collection("guilds").find_one(
-        doc,
-        FindOneOptions::builder()
-            .projection(doc! {
-                "_id": 1,
-                "name": 1,
-                "invites.$": 1,
-            })
-            .build(),
-    ) {
-        if let Some(doc) = result {
-            let invite = doc
-                .get_array("invites")
-                .unwrap()
-                .iter()
-                .next()
-                .unwrap()
-                .as_document()
-                .unwrap();
-
-            Some((
-                doc.get_str("_id").unwrap().to_string(),
-                doc.get_str("name").unwrap().to_string(),
-                from_bson(Bson::Document(invite.clone())).unwrap(),
-            ))
-        } else {
-            None
-        }
-    } else {
-        None
-    }
-}

src/guards/mod.rs

@@ -1,3 +0,0 @@
-pub mod auth;
-pub mod channel;
-pub mod guild;

src/main.rs

@@ -1,41 +1,141 @@
 #![feature(proc_macro_hygiene, decl_macro)]
+#![feature(async_closure)]
+
 #[macro_use]
 extern crate rocket;
 #[macro_use]
 extern crate rocket_contrib;
 #[macro_use]
+extern crate lazy_static;
+#[macro_use]
+extern crate impl_ops;
+#[macro_use]
 extern crate bitfield;
+extern crate ctrlc;
 
 pub mod database;
-pub mod email;
-pub mod guards;
 pub mod notifications;
 pub mod routes;
 pub mod util;
+pub mod version;
 
-use dotenv;
+use async_std::task;
+use chrono::Duration;
+use futures::join;
+use log::info;
+use rauth::options::{EmailVerification, Options, SMTP};
+use rauth::{
+    auth::Auth,
+    options::{Template, Templates},
+};
 use rocket_cors::AllowedOrigins;
-use std::thread;
+use rocket_prometheus::PrometheusMetrics;
+use util::variables::{
+    APP_URL, HCAPTCHA_KEY, INVITE_ONLY, PUBLIC_URL, SMTP_FROM, SMTP_HOST, SMTP_PASSWORD,
+    SMTP_USERNAME, USE_EMAIL, USE_HCAPTCHA, USE_PROMETHEUS,
+};
 
-fn main() {
+#[async_std::main]
+async fn main() {
     dotenv::dotenv().ok();
-    database::connect();
-    notifications::start_worker();
+    env_logger::init_from_env(env_logger::Env::default().filter_or("RUST_LOG", "info"));
 
-    thread::spawn(|| {
-        notifications::pubsub::launch_subscriber();
-    });
+    info!(
+        "Starting REVOLT server [version {}].",
+        crate::version::VERSION
+    );
 
-    thread::spawn(|| {
-        notifications::ws::launch_server();
-    });
+    util::variables::preflight_checks();
+    database::connect().await;
+    notifications::hive::init_hive().await;
 
+    ctrlc::set_handler(move || {
+        // Force ungraceful exit to avoid hang.
+        std::process::exit(0);
+    })
+    .expect("Error setting Ctrl-C handler");
+
+    let web_task = task::spawn(launch_web());
+    let hive_task = task::spawn(notifications::hive::listen());
+
+    join!(
+        web_task,
+        hive_task,
+        notifications::websocket::launch_server()
+    );
+}
+
+async fn launch_web() {
     let cors = rocket_cors::CorsOptions {
         allowed_origins: AllowedOrigins::All,
         ..Default::default()
     }
     .to_cors()
-    .unwrap();
+    .expect("Failed to create CORS.");
 
-    routes::mount(rocket::ignite()).attach(cors).launch();
+    let mut options = Options::new()
+        .base_url(format!("{}/auth", *PUBLIC_URL))
+        .email_verification(if *USE_EMAIL {
+            EmailVerification::Enabled {
+                success_redirect_uri: format!("{}/login", *APP_URL),
+                welcome_redirect_uri: format!("{}/welcome", *APP_URL),
+                password_reset_url: Some(format!("{}/login/reset", *APP_URL)),
+
+                verification_expiry: Duration::days(1),
+                password_reset_expiry: Duration::hours(1),
+
+                templates: Templates {
+                    verify_email: Template {
+                        title: "Verify your REVOLT account.",
+                        text: "Verify your email here: {{url}}",
+                        html: include_str!("../assets/templates/verify.html"),
+                    },
+                    reset_password: Template {
+                        title: "Reset your REVOLT password.",
+                        text: "Reset your password here: {{url}}",
+                        html: include_str!("../assets/templates/reset.html"),
+                    },
+                    welcome: None,
+                },
+
+                smtp: SMTP {
+                    from: (*SMTP_FROM).to_string(),
+                    host: (*SMTP_HOST).to_string(),
+                    username: (*SMTP_USERNAME).to_string(),
+                    password: (*SMTP_PASSWORD).to_string(),
+                },
+            }
+        } else {
+            EmailVerification::Disabled
+        });
+
+    if *INVITE_ONLY {
+        options = options.invite_only_collection(database::get_collection("invites"))
+    }
+
+    if *USE_HCAPTCHA {
+        options = options.hcaptcha_secret(HCAPTCHA_KEY.clone());
+    }
+
+    let auth = Auth::new(database::get_collection("accounts"), options);
+
+    let mut rocket = rocket::ignite();
+
+    if *USE_PROMETHEUS {
+        info!("Enabled Prometheus metrics!");
+        let prometheus = PrometheusMetrics::new();
+        rocket = rocket
+            .attach(prometheus.clone())
+            .mount("/metrics", prometheus);
+    }
+
+    routes::mount(rocket)
+        .mount("/", rocket_cors::catch_all_options_routes())
+        .mount("/auth", rauth::routes::routes())
+        .manage(auth)
+        .manage(cors.clone())
+        .attach(cors)
+        .launch()
+        .await
+        .unwrap();
 }

src/notifications/events.rs

@@ -0,0 +1,237 @@
+use hive_pubsub::PubSub;
+use mongodb::bson::doc;
+use rauth::auth::Session;
+use rocket_contrib::json::JsonValue;
+use serde::{Deserialize, Serialize};
+
+use super::hive::{get_hive, subscribe_if_exists};
+use crate::{database::*, util::result::Result};
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+#[serde(tag = "error")]
+pub enum WebSocketError {
+    LabelMe,
+    InternalError { at: String },
+    InvalidSession,
+    OnboardingNotFinished,
+    AlreadyAuthenticated,
+}
+
+#[derive(Deserialize, Debug)]
+#[serde(tag = "type")]
+pub enum ServerboundNotification {
+    Authenticate(Session),
+    BeginTyping { channel: String },
+    EndTyping { channel: String },
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub enum RemoveUserField {
+    ProfileContent,
+    ProfileBackground,
+    StatusText,
+    Avatar,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub enum RemoveChannelField {
+    Icon,
+    Description,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub enum RemoveServerField {
+    Icon,
+    Banner,
+    Description,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub enum RemoveMemberField {
+    Nickname,
+    Avatar,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+#[serde(tag = "type")]
+pub enum ClientboundNotification {
+    Error(WebSocketError),
+    Authenticated,
+    Ready {
+        users: Vec<User>,
+        servers: Vec<Server>,
+        channels: Vec<Channel>,
+    },
+
+    Message(Message),
+    MessageUpdate {
+        id: String,
+        channel: String,
+        data: JsonValue,
+    },
+    MessageDelete {
+        id: String,
+        channel: String,
+    },
+
+    ChannelCreate(Channel),
+    ChannelUpdate {
+        id: String,
+        data: JsonValue,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        clear: Option<RemoveChannelField>,
+    },
+    ChannelDelete {
+        id: String,
+    },
+    ChannelGroupJoin {
+        id: String,
+        user: String,
+    },
+    ChannelGroupLeave {
+        id: String,
+        user: String,
+    },
+    ChannelStartTyping {
+        id: String,
+        user: String,
+    },
+    ChannelStopTyping {
+        id: String,
+        user: String,
+    },
+    ChannelAck {
+        id: String,
+        user: String,
+        message_id: String,
+    },
+
+    ServerUpdate {
+        id: String,
+        data: JsonValue,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        clear: Option<RemoveServerField>,
+    },
+    ServerDelete {
+        id: String,
+    },
+    ServerMemberUpdate {
+        id: MemberCompositeKey,
+        data: JsonValue,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        clear: Option<RemoveMemberField>,
+    },
+    ServerMemberJoin {
+        id: String,
+        user: String,
+    },
+    ServerMemberLeave {
+        id: String,
+        user: String,
+    },
+
+    UserUpdate {
+        id: String,
+        data: JsonValue,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        clear: Option<RemoveUserField>,
+    },
+    UserRelationship {
+        id: String,
+        user: User,
+        status: RelationshipStatus,
+    },
+    UserPresence {
+        id: String,
+        online: bool,
+    },
+    UserSettingsUpdate {
+        id: String,
+        update: JsonValue,
+    },
+}
+
+impl ClientboundNotification {
+    pub fn publish(self, topic: String) {
+        async_std::task::spawn(async move {
+            prehandle_hook(&self).await.ok(); // ! FIXME: this should be moved to pubsub
+            hive_pubsub::backend::mongo::publish(get_hive(), &topic, self)
+                .await
+                .ok();
+        });
+    }
+}
+
+pub async fn prehandle_hook(notification: &ClientboundNotification) -> Result<()> {
+    match &notification {
+        ClientboundNotification::ChannelGroupJoin { id, user } => {
+            subscribe_if_exists(user.clone(), id.clone()).ok();
+        }
+        ClientboundNotification::ChannelCreate(channel) => {
+            let channel_id = channel.id();
+            match &channel {
+                Channel::SavedMessages { user, .. } => {
+                    subscribe_if_exists(user.clone(), channel_id.to_string()).ok();
+                }
+                Channel::DirectMessage { recipients, .. } | Channel::Group { recipients, .. } => {
+                    for recipient in recipients {
+                        subscribe_if_exists(recipient.clone(), channel_id.to_string()).ok();
+                    }
+                }
+                Channel::TextChannel { server, .. } => {
+                    // ! FIXME: write a better algorithm?
+                    let members = Server::fetch_member_ids(server).await?;
+                    for member in members {
+                        subscribe_if_exists(member.clone(), channel_id.to_string()).ok();
+                    }
+                }
+            }
+        }
+        ClientboundNotification::ServerMemberJoin { id, user } => {
+            let server = Ref::from_unchecked(id.clone()).fetch_server().await?;
+
+            subscribe_if_exists(user.clone(), id.clone()).ok();
+
+            for channel in server.channels {
+                subscribe_if_exists(user.clone(), channel).ok();
+            }
+        }
+        ClientboundNotification::UserRelationship { id, user, status } => {
+            if status != &RelationshipStatus::None {
+                subscribe_if_exists(id.clone(), user.id.clone()).ok();
+            }
+        }
+        _ => {}
+    }
+
+    Ok(())
+}
+
+pub async fn posthandle_hook(notification: &ClientboundNotification) {
+    match &notification {
+        ClientboundNotification::ChannelDelete { id } => {
+            get_hive().hive.drop_topic(&id).ok();
+        }
+        ClientboundNotification::ChannelGroupLeave { id, user } => {
+            get_hive().hive.unsubscribe(user, id).ok();
+        }
+        ClientboundNotification::ServerDelete { id } => {
+            get_hive().hive.drop_topic(&id).ok();
+        }
+        ClientboundNotification::ServerMemberLeave { id, user } => {
+            get_hive().hive.unsubscribe(user, id).ok();
+
+            if let Ok(server) = Ref::from_unchecked(id.clone()).fetch_server().await {
+                for channel in server.channels {
+                    get_hive().hive.unsubscribe(user, &channel).ok();
+                }
+            }
+        }
+        ClientboundNotification::UserRelationship { id, user, status } => {
+            if status == &RelationshipStatus::None {
+                get_hive().hive.unsubscribe(id, &user.id).ok();
+            }
+        }
+        _ => {}
+    }
+}

src/notifications/events/groups.rs

@@ -1,13 +0,0 @@
-use serde::{Deserialize, Serialize};
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct UserJoin {
-    pub id: String,
-    pub user: String,
-}
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct UserLeave {
-    pub id: String,
-    pub user: String,
-}

src/notifications/events/guilds.rs

@@ -1,33 +0,0 @@
-use serde::{Deserialize, Serialize};
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct UserJoin {
-    pub id: String,
-    pub user: String,
-}
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct UserLeave {
-    pub id: String,
-    pub user: String,
-    pub banned: bool,
-}
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct ChannelCreate {
-    pub id: String,
-    pub channel: String,
-    pub name: String,
-    pub description: String,
-}
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct ChannelDelete {
-    pub id: String,
-    pub channel: String,
-}
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct Delete {
-    pub id: String,
-}

src/notifications/events/message.rs

@@ -1,21 +0,0 @@
-use serde::{Deserialize, Serialize};
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct Create {
-    pub id: String,
-    pub nonce: Option<String>,
-    pub channel: String,
-    pub author: String,
-    pub content: String,
-}
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct Edit {
-    pub id: String,
-    pub content: String,
-}
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct Delete {
-    pub id: String,
-}

src/notifications/events/mod.rs

@@ -1,41 +0,0 @@
-use serde::{Deserialize, Serialize};
-use serde_json::{json, Value};
-
-pub mod groups;
-pub mod guilds;
-pub mod message;
-pub mod users;
-
-#[allow(non_camel_case_types)]
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub enum Notification {
-    message_create(message::Create),
-    message_edit(message::Edit),
-    message_delete(message::Delete),
-    group_user_join(groups::UserJoin),
-    group_user_leave(groups::UserLeave),
-    guild_user_join(guilds::UserJoin),
-    guild_user_leave(guilds::UserLeave),
-    guild_channel_create(guilds::ChannelCreate),
-    guild_channel_delete(guilds::ChannelDelete),
-    guild_delete(guilds::Delete),
-    user_friend_status(users::FriendStatus),
-}
-
-impl Notification {
-    pub fn serialize(self) -> String {
-        if let Value::Object(obj) = json!(self) {
-            let (key, value) = obj.iter().next().unwrap();
-
-            if let Value::Object(data) = value {
-                let mut data = data.clone();
-                data.insert("type".to_string(), Value::String(key.to_string()));
-                json!(data).to_string()
-            } else {
-                unreachable!()
-            }
-        } else {
-            unreachable!()
-        }
-    }
-}

src/notifications/events/users.rs

@@ -1,7 +0,0 @@
-use serde::{Deserialize, Serialize};
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct FriendStatus {
-    pub id: String,
-    pub status: i32,
-}

src/notifications/hive.rs

@@ -0,0 +1,66 @@
+use super::{events::ClientboundNotification, websocket};
+use crate::database::*;
+
+use futures::FutureExt;
+use hive_pubsub::backend::mongo::MongodbPubSub;
+use hive_pubsub::PubSub;
+use log::{debug, error};
+use once_cell::sync::OnceCell;
+use serde_json::to_string;
+
+type Hive = MongodbPubSub<String, String, ClientboundNotification>;
+static HIVE: OnceCell<Hive> = OnceCell::new();
+
+pub async fn init_hive() {
+    let hive = MongodbPubSub::new(
+        |ids, notification: ClientboundNotification| {
+            let notif = notification.clone();
+            async_std::task::spawn(async move {
+                super::events::posthandle_hook(&notif).await;
+            });
+
+            if let Ok(data) = to_string(&notification) {
+                debug!("Pushing out notification. {}", data);
+                websocket::publish(ids, notification);
+            } else {
+                error!("Failed to serialise notification.");
+            }
+        },
+        get_collection("pubsub"),
+    );
+
+    if HIVE.set(hive).is_err() {
+        panic!("Failed to set global pubsub instance.");
+    }
+}
+
+pub async fn listen() {
+    HIVE.get()
+        .unwrap()
+        .listen()
+        .fuse()
+        .await
+        .expect("Hive hit an error");
+}
+
+pub fn subscribe_multiple(user: String, topics: Vec<String>) -> Result<(), String> {
+    let hive = HIVE.get().unwrap();
+    for topic in topics {
+        hive.subscribe(user.clone(), topic)?;
+    }
+
+    Ok(())
+}
+
+pub fn subscribe_if_exists(user: String, topic: String) -> Result<(), String> {
+    let hive = HIVE.get().unwrap();
+    if hive.hive.map.lock().unwrap().get_left(&user).is_some() {
+        hive.subscribe(user, topic)?;
+    }
+
+    Ok(())
+}
+
+pub fn get_hive() -> &'static Hive {
+    HIVE.get().unwrap()
+}

src/notifications/mod.rs

@@ -1,74 +1,5 @@
-use crate::guards::channel::ChannelRef;
-
-use once_cell::sync::OnceCell;
-use std::sync::mpsc::{channel, Sender};
-use std::thread;
-
 pub mod events;
-pub mod pubsub;
-pub mod state;
-pub mod ws;
-
-pub fn send_message<U: Into<Option<Vec<String>>>, G: Into<Option<String>>>(
-    users: U,
-    guild: G,
-    data: events::Notification,
-) -> bool {
-    let users = users.into();
-    let guild = guild.into();
-
-    if pubsub::send_message(users.clone(), guild.clone(), data.clone()) {
-        state::send_message(users, guild, data.serialize());
-
-        true
-    } else {
-        false
-    }
-}
-
-struct NotificationArguments {
-    users: Option<Vec<String>>,
-    guild: Option<String>,
-    data: events::Notification,
-}
-
-static mut SENDER: OnceCell<Sender<NotificationArguments>> = OnceCell::new();
-
-pub fn start_worker() {
-    let (sender, receiver) = channel();
-    unsafe {
-        SENDER.set(sender).unwrap();
-    }
-
-    thread::spawn(move || {
-        while let Ok(data) = receiver.recv() {
-            send_message(data.users, data.guild, data.data);
-        }
-    });
-}
-
-pub fn send_message_threaded<U: Into<Option<Vec<String>>>, G: Into<Option<String>>>(
-    users: U,
-    guild: G,
-    data: events::Notification,
-) -> bool {
-    unsafe {
-        SENDER
-            .get()
-            .unwrap()
-            .send(NotificationArguments {
-                users: users.into(),
-                guild: guild.into(),
-                data,
-            })
-            .is_ok()
-    }
-}
-
-pub fn send_message_given_channel(data: events::Notification, channel: &ChannelRef) {
-    match channel.channel_type {
-        0..=1 => send_message_threaded(channel.recipients.clone(), None, data),
-        2 => send_message_threaded(None, channel.guild.clone(), data),
-        _ => unreachable!(),
-    };
-}
+pub mod hive;
+pub mod payload;
+pub mod subscriptions;
+pub mod websocket;

src/notifications/payload.rs

@@ -0,0 +1,118 @@
+use std::collections::HashSet;
+
+use crate::{database::*, notifications::events::ClientboundNotification};
+use crate::{
+    database::{entities::User, get_collection},
+    util::result::{Error, Result},
+};
+use futures::StreamExt;
+use mongodb::bson::{doc, from_document};
+
+pub async fn generate_ready(mut user: User) -> Result<ClientboundNotification> {
+    let mut user_ids: HashSet<String> = HashSet::new();
+
+    if let Some(relationships) = &user.relations {
+        user_ids.extend(
+            relationships
+                .iter()
+                .map(|relationship| relationship.id.clone()),
+        );
+    }
+
+    let server_ids = user.fetch_server_ids().await?;
+    let mut cursor = get_collection("servers")
+        .find(
+            doc! {
+                "_id": {
+                    "$in": server_ids
+                }
+            },
+            None,
+        )
+        .await
+        .map_err(|_| Error::DatabaseError {
+            operation: "find",
+            with: "servers",
+        })?;
+
+    let mut servers = vec![];
+    let mut channel_ids = vec![];
+    while let Some(result) = cursor.next().await {
+        if let Ok(doc) = result {
+            let server: Server = from_document(doc).map_err(|_| Error::DatabaseError {
+                operation: "from_document",
+                with: "server",
+            })?;
+
+            channel_ids.extend(server.channels.iter().cloned());
+            servers.push(server);
+        }
+    }
+
+    let mut cursor = get_collection("channels")
+        .find(
+            doc! {
+                "$or": [
+                    {
+                        "_id": {
+                            "$in": channel_ids
+                        }
+                    },
+                    {
+                        "channel_type": "SavedMessages",
+                        "user": &user.id
+                    },
+                    {
+                        "channel_type": "DirectMessage",
+                        "recipients": &user.id
+                    },
+                    {
+                        "channel_type": "Group",
+                        "recipients": &user.id
+                    }
+                ]
+            },
+            None,
+        )
+        .await
+        .map_err(|_| Error::DatabaseError {
+            operation: "find",
+            with: "channels",
+        })?;
+
+    let mut channels = vec![];
+    while let Some(result) = cursor.next().await {
+        if let Ok(doc) = result {
+            let channel = from_document(doc).map_err(|_| Error::DatabaseError {
+                operation: "from_document",
+                with: "channel",
+            })?;
+
+            if let Channel::Group { recipients, .. } = &channel {
+                user_ids.extend(recipients.iter().cloned());
+            } else if let Channel::DirectMessage { recipients, .. } = &channel {
+                user_ids.extend(recipients.iter().cloned());
+            }
+
+            channels.push(channel);
+        }
+    }
+
+    user_ids.remove(&user.id);
+    let mut users = if user_ids.len() > 0 {
+        user.fetch_multiple_users(user_ids.into_iter().collect::<Vec<String>>())
+            .await?
+    } else {
+        vec![]
+    };
+
+    user.relationship = Some(RelationshipStatus::User);
+    user.online = Some(true);
+    users.push(user);
+
+    Ok(ClientboundNotification::Ready {
+        users,
+        servers,
+        channels,
+    })
+}

src/notifications/pubsub.rs

@@ -1,102 +0,0 @@
-use super::events::Notification;
-use crate::database::get_collection;
-
-use bson::{doc, from_bson, to_bson, Bson};
-use mongodb::options::{CursorType, FindOneOptions, FindOptions};
-use serde::{Deserialize, Serialize};
-use std::time::Duration;
-use ulid::Ulid;
-
-use once_cell::sync::OnceCell;
-static SOURCEID: OnceCell<String> = OnceCell::new();
-
-#[derive(Serialize, Deserialize, Debug)]
-pub struct PubSubMessage {
-    #[serde(rename = "_id")]
-    id: String,
-    source: String,
-
-    user_recipients: Option<Vec<String>>,
-    target_guild: Option<String>,
-    data: Notification,
-}
-
-pub fn send_message(users: Option<Vec<String>>, guild: Option<String>, data: Notification) -> bool {
-    let message = PubSubMessage {
-        id: Ulid::new().to_string(),
-        source: SOURCEID.get().unwrap().to_string(),
-        user_recipients: users.into(),
-        target_guild: guild.into(),
-        data,
-    };
-
-    if get_collection("pubsub")
-        .insert_one(
-            to_bson(&message)
-                .expect("Failed to serialize pubsub message.")
-                .as_document()
-                .expect("Failed to convert to a document.")
-                .clone(),
-            None,
-        )
-        .is_ok()
-    {
-        true
-    } else {
-        false
-    }
-}
-
-pub fn launch_subscriber() {
-    let source = Ulid::new().to_string();
-    SOURCEID
-        .set(source.clone())
-        .expect("Failed to create and set source ID.");
-
-    let pubsub = get_collection("pubsub");
-    if let Ok(result) = pubsub.find_one(
-        doc! {},
-        FindOneOptions::builder().sort(doc! { "_id": -1 }).build(),
-    ) {
-        let query = if let Some(doc) = result {
-            doc! { "_id": { "$gt": doc.get_str("_id").unwrap() } }
-        } else {
-            doc! {}
-        };
-
-        if let Ok(mut cursor) = pubsub.find(
-            query,
-            FindOptions::builder()
-                .cursor_type(CursorType::TailableAwait)
-                .no_cursor_timeout(true)
-                .max_await_time(Duration::from_secs(1200))
-                .build(),
-        ) {
-            loop {
-                while let Some(item) = cursor.next() {
-                    if let Ok(doc) = item {
-                        if let Ok(message) =
-                            from_bson(Bson::Document(doc)) as Result<PubSubMessage, _>
-                        {
-                            if &message.source != &source {
-                                super::state::send_message(
-                                    message.user_recipients,
-                                    message.target_guild,
-                                    message.data.serialize(),
-                                );
-                            }
-                        } else {
-                            eprintln!("Failed to deserialize pubsub message.");
-                        }
-                    } else {
-                        eprintln!("Failed to unwrap a document from pubsub.");
-                    }
-                }
-            }
-        } else {
-            eprintln!("Failed to open subscriber cursor.");
-        }
-    } else {
-        eprintln!("Failed to fetch latest document from pubsub collection.");
-    }
-}

src/notifications/state.rs

@@ -1,205 +0,0 @@
-use crate::database;
-use crate::util::vec_to_set;
-
-use bson::doc;
-use hashbrown::{HashMap, HashSet};
-use mongodb::options::FindOneOptions;
-use once_cell::sync::OnceCell;
-use std::sync::RwLock;
-use ws::Sender;
-
-pub enum StateResult {
-    DatabaseError,
-    InvalidToken,
-    Success(String),
-}
-
-static mut CONNECTIONS: OnceCell<RwLock<HashMap<String, Sender>>> = OnceCell::new();
-
-pub fn add_connection(id: String, sender: Sender) {
-    unsafe {
-        CONNECTIONS
-            .get()
-            .unwrap()
-            .write()
-            .unwrap()
-            .insert(id, sender);
-    }
-}
-
-pub struct User {
-    connections: HashSet<String>,
-    guilds: HashSet<String>,
-}
-
-impl User {
-    pub fn new() -> User {
-        User {
-            connections: HashSet::new(),
-            guilds: HashSet::new(),
-        }
-    }
-}
-
-pub struct Guild {
-    users: HashSet<String>,
-}
-
-impl Guild {
-    pub fn new() -> Guild {
-        Guild {
-            users: HashSet::new(),
-        }
-    }
-}
-
-pub struct GlobalState {
-    users: HashMap<String, User>,
-    guilds: HashMap<String, Guild>,
-}
-
-impl GlobalState {
-    pub fn new() -> GlobalState {
-        GlobalState {
-            users: HashMap::new(),
-            guilds: HashMap::new(),
-        }
-    }
-
-    pub fn push_to_guild(&mut self, guild: String, user: String) {
-        if !self.guilds.contains_key(&guild) {
-            self.guilds.insert(guild.clone(), Guild::new());
-        }
-
-        self.guilds.get_mut(&guild).unwrap().users.insert(user);
-    }
-
-    pub fn try_authenticate(&mut self, connection: String, access_token: String) -> StateResult {
-        if let Ok(result) = database::get_collection("users").find_one(
-            doc! {
-                "access_token": access_token,
-            },
-            FindOneOptions::builder()
-                .projection(doc! { "_id": 1 })
-                .build(),
-        ) {
-            if let Some(user) = result {
-                let user_id = user.get_str("_id").unwrap();
-
-                if self.users.contains_key(user_id) {
-                    self.users
-                        .get_mut(user_id)
-                        .unwrap()
-                        .connections
-                        .insert(connection);
-
-                    return StateResult::Success(user_id.to_string());
-                }
-
-                if let Ok(results) =
-                    database::get_collection("members").find(doc! { "_id.user": &user_id }, None)
-                {
-                    let mut guilds = vec![];
-                    for result in results {
-                        if let Ok(entry) = result {
-                            guilds.push(
-                                entry
-                                    .get_document("_id")
-                                    .unwrap()
-                                    .get_str("guild")
-                                    .unwrap()
-                                    .to_string(),
-                            );
-                        }
-                    }
-
-                    let mut user = User::new();
-                    for guild in guilds {
-                        user.guilds.insert(guild.clone());
-                        self.push_to_guild(guild, user_id.to_string());
-                    }
-
-                    user.connections.insert(connection);
-                    self.users.insert(user_id.to_string(), user);
-
-                    StateResult::Success(user_id.to_string())
-                } else {
-                    StateResult::DatabaseError
-                }
-            } else {
-                StateResult::InvalidToken
-            }
-        } else {
-            StateResult::DatabaseError
-        }
-    }
-
-    pub fn disconnect<U: Into<Option<String>>>(&mut self, user_id: U, connection: String) {
-        if let Some(user_id) = user_id.into() {
-            let user = self.users.get_mut(&user_id).unwrap();
-            user.connections.remove(&connection);
-
-            if user.connections.len() == 0 {
-                for guild in &user.guilds {
-                    self.guilds.get_mut(guild).unwrap().users.remove(&user_id);
-                }
-
-                self.users.remove(&user_id);
-            }
-        }
-
-        unsafe {
-            CONNECTIONS
-                .get()
-                .unwrap()
-                .write()
-                .unwrap()
-                .remove(&connection);
-        }
-    }
-}
-
-pub static mut DATA: OnceCell<RwLock<GlobalState>> = OnceCell::new();
-
-pub fn init() {
-    unsafe {
-        if CONNECTIONS.set(RwLock::new(HashMap::new())).is_err() {
-            panic!("Failed to set global connections map.");
-        }
-
-        if DATA.set(RwLock::new(GlobalState::new())).is_err() {
-            panic!("Failed to set global state.");
-        }
-    }
-}
-
-pub fn send_message(users: Option<Vec<String>>, guild: Option<String>, data: String) {
-    let state = unsafe { DATA.get().unwrap().read().unwrap() };
-    let mut connections = HashSet::new();
-
-    let mut users = vec_to_set(&users.unwrap_or(vec![]));
-    if let Some(guild) = guild {
-        if let Some(entry) = state.guilds.get(&guild) {
-            for user in &entry.users {
-                users.insert(user.to_string());
-            }
-        }
-    }
-
-    for user in users {
-        if let Some(entry) = state.users.get(&user) {
-            for connection in &entry.connections {
-                connections.insert(connection.clone());
-            }
-        }
-    }
-
-    let targets = unsafe { CONNECTIONS.get().unwrap().read().unwrap() };
-    for conn in connections {
-        if let Some(sender) = targets.get(&conn) {
-            if sender.send(data.clone()).is_err() {
-                eprintln!("Failed to send a notification to a websocket. [{}]", &conn);
-            }
-        }
-    }
-}

src/notifications/subscriptions.rs

@@ -0,0 +1,88 @@
+use crate::database::*;
+
+use super::hive::get_hive;
+use futures::StreamExt;
+use hive_pubsub::PubSub;
+use mongodb::bson::doc;
+use mongodb::bson::Document;
+use mongodb::options::FindOptions;
+
+pub async fn generate_subscriptions(user: &User) -> Result<(), String> {
+    let hive = get_hive();
+    hive.subscribe(user.id.clone(), user.id.clone())?;
+
+    if let Some(relations) = &user.relations {
+        for relation in relations {
+            hive.subscribe(user.id.clone(), relation.id.clone())?;
+        }
+    }
+
+    let server_ids = user
+        .fetch_server_ids()
+        .await
+        .map_err(|_| "Failed to fetch memberships.".to_string())?;
+
+    let channel_ids = get_collection("servers")
+        .find(
+            doc! {
+                "_id": {
+                    "$in": &server_ids
+                }
+            },
+            None,
+        )
+        .await
+        .map_err(|_| "Failed to fetch servers.".to_string())?
+        .filter_map(async move |s| s.ok())
+        .collect::<Vec<Document>>()
+        .await
+        .into_iter()
+        .filter_map(|x| {
+            x.get_array("channels").ok().map(|v| {
+                v.into_iter()
+                    .filter_map(|x| x.as_str().map(|x| x.to_string()))
+                    .collect::<Vec<String>>()
+            })
+        })
+        .flatten()
+        .collect::<Vec<String>>();
+
+    for id in server_ids {
+        hive.subscribe(user.id.clone(), id)?;
+    }
+
+    for id in channel_ids {
+        hive.subscribe(user.id.clone(), id)?;
+    }
+
+    let mut cursor = get_collection("channels")
+        .find(
+            doc! {
+                "$or": [
+                    {
+                        "channel_type": "SavedMessages",
+                        "user": &user.id
+                    },
+                    {
+                        "channel_type": "DirectMessage",
+                        "recipients": &user.id
+                    },
+                    {
+                        "channel_type": "Group",
+                        "recipients": &user.id
+                    }
+                ]
+            },
+            FindOptions::builder().projection(doc! { "_id": 1 }).build(),
+        )
+        .await
+        .map_err(|_| "Failed to fetch channels.".to_string())?;
+
+    while let Some(result) = cursor.next().await {
+        if let Ok(doc) = result {
+            hive.subscribe(user.id.clone(), doc.get_str("_id").unwrap().to_string())?;
+        }
+    }
+
+    Ok(())
+}

src/notifications/websocket.rs

@@ -0,0 +1,276 @@
+use crate::database::*;
+use crate::util::variables::WS_HOST;
+
+use super::subscriptions;
+
+use async_std::net::{TcpListener, TcpStream};
+use async_std::task;
+use async_tungstenite::tungstenite::Message;
+use futures::channel::mpsc::{unbounded, UnboundedSender};
+use futures::stream::TryStreamExt;
+use futures::{pin_mut, prelude::*};
+use hive_pubsub::PubSub;
+use log::{debug, info};
+use many_to_many::ManyToMany;
+use rauth::{
+    auth::{Auth, Session},
+    options::Options,
+};
+use std::collections::HashMap;
+use std::net::SocketAddr;
+use std::sync::{Arc, Mutex, RwLock};
+
+use super::{
+    events::{ClientboundNotification, ServerboundNotification, WebSocketError},
+    hive::get_hive,
+};
+
+type Tx = UnboundedSender<Message>;
+type PeerMap = Arc<Mutex<HashMap<SocketAddr, Tx>>>;
+
+lazy_static! {
+    static ref CONNECTIONS: PeerMap = Arc::new(Mutex::new(HashMap::new()));
+    static ref USERS: Arc<RwLock<ManyToMany<String, SocketAddr>>> =
+        Arc::new(RwLock::new(ManyToMany::new()));
+}
+
+pub async fn launch_server() {
+    let try_socket = TcpListener::bind(WS_HOST.to_string()).await;
+    let listener = try_socket.expect("Failed to bind");
+    info!("Listening on: {}", *WS_HOST);
+
+    while let Ok((stream, _)) = listener.accept().await {
+        task::spawn(accept(stream));
+    }
+}
+
+async fn accept(stream: TcpStream) {
+    let addr = stream
+        .peer_addr()
+        .expect("Connected streams should have a peer address.");
+    let ws_stream = async_tungstenite::accept_async(stream)
+        .await
+        .expect("Error during websocket handshake.");
+
+    info!("User established WebSocket connection from {}.", &addr);
+
+    let (write, read) = ws_stream.split();
+    let (tx, rx) = unbounded();
+    CONNECTIONS.lock().unwrap().insert(addr, tx.clone());
+
+    let send = |notification: ClientboundNotification| {
+        if let Ok(response) = serde_json::to_string(&notification) {
+            if let Err(_) = tx.unbounded_send(Message::Text(response)) {
+                debug!("Failed unbounded_send to websocket stream.");
+            }
+        }
+    };
+
+    let session: Arc<Mutex<Option<Session>>> = Arc::new(Mutex::new(None));
+    let mutex_generator = || session.clone();
+    let fwd = rx.map(Ok).forward(write);
+    let incoming = read.try_for_each(async move |msg| {
+        let mutex = mutex_generator();
+        if let Message::Text(text) = msg {
+            if let Ok(notification) = serde_json::from_str::<ServerboundNotification>(&text) {
+                match notification {
+                    ServerboundNotification::Authenticate(new_session) => {
+                        {
+                            if mutex.lock().unwrap().is_some() {
+                                send(ClientboundNotification::Error(
+                                    WebSocketError::AlreadyAuthenticated,
+                                ));
+
+                                return Ok(());
+                            }
+                        }
+
+                        if let Ok(validated_session) =
+                            Auth::new(get_collection("accounts"), Options::new())
+                                .verify_session(new_session)
+                                .await
+                        {
+                            let id = validated_session.user_id.clone();
+                            if let Ok(user) = (Ref { id: id.clone() }).fetch_user().await {
+                                let was_online = is_online(&id);
+                                {
+                                    match USERS.write() {
+                                        Ok(mut map) => {
+                                            map.insert(id.clone(), addr);
+                                        }
+                                        Err(_) => {
+                                            send(ClientboundNotification::Error(
+                                                WebSocketError::InternalError {
+                                                    at: "Writing users map.".to_string(),
+                                                },
+                                            ));
+
+                                            return Ok(());
+                                        }
+                                    }
+                                }
+
+                                *mutex.lock().unwrap() = Some(validated_session);
+
+                                if let Err(_) = subscriptions::generate_subscriptions(&user).await {
+                                    send(ClientboundNotification::Error(
+                                        WebSocketError::InternalError {
+                                            at: "Generating subscriptions.".to_string(),
+                                        },
+                                    ));
+
+                                    return Ok(());
+                                }
+
+                                send(ClientboundNotification::Authenticated);
+
+                                match super::payload::generate_ready(user).await {
+                                    Ok(payload) => {
+                                        send(payload);
+
+                                        if !was_online {
+                                            ClientboundNotification::UserPresence {
+                                                id: id.clone(),
+                                                online: true,
+                                            }
+                                            .publish(id);
+                                        }
+                                    }
+                                    Err(_) => {
+                                        send(ClientboundNotification::Error(
+                                            WebSocketError::InternalError {
+                                                at: "Generating payload.".to_string(),
+                                            },
+                                        ));
+
+                                        return Ok(());
+                                    }
+                                }
+                            } else {
+                                send(ClientboundNotification::Error(
+                                    WebSocketError::OnboardingNotFinished,
+                                ));
+                            }
+                        } else {
+                            send(ClientboundNotification::Error(
+                                WebSocketError::InvalidSession,
+                            ));
+                        }
+                    }
+                    // ! TEMP: verify user part of channel
+                    // ! Could just run permission check here.
+                    ServerboundNotification::BeginTyping { channel } => {
+                        if mutex.lock().unwrap().is_some() {
+                            let user = {
+                                let mutex = mutex.lock().unwrap();
+                                let session = mutex.as_ref().unwrap();
+                                session.user_id.clone()
+                            };
+
+                            ClientboundNotification::ChannelStartTyping {
+                                id: channel.clone(),
+                                user,
+                            }
+                            .publish(channel);
+                        } else {
+                            send(ClientboundNotification::Error(
+                                WebSocketError::AlreadyAuthenticated,
+                            ));
+
+                            return Ok(());
+                        }
+                    }
+                    ServerboundNotification::EndTyping { channel } => {
+                        if mutex.lock().unwrap().is_some() {
+                            let user = {
+                                let mutex = mutex.lock().unwrap();
+                                let session = mutex.as_ref().unwrap();
+                                session.user_id.clone()
+                            };
+
+                            ClientboundNotification::ChannelStopTyping {
+                                id: channel.clone(),
+                                user,
+                            }
+                            .publish(channel);
+                        } else {
+                            send(ClientboundNotification::Error(
+                                WebSocketError::AlreadyAuthenticated,
+                            ));
+
+                            return Ok(());
+                        }
+                    }
+                }
+            }
+        }
+
+        Ok(())
+    });
+
+    pin_mut!(fwd, incoming);
+    future::select(fwd, incoming).await;
+
+    info!("User {} disconnected.", &addr);
+    CONNECTIONS.lock().unwrap().remove(&addr);
+
+    let mut offline = None;
+    {
+        let session = session.lock().unwrap();
+        if let Some(session) = session.as_ref() {
+            let mut users = USERS.write().unwrap();
+            users.remove(&session.user_id, &addr);
+            if users.get_left(&session.user_id).is_none() {
+                get_hive().drop_client(&session.user_id).unwrap();
+                offline = Some(session.user_id.clone());
+            }
+        }
+    }
+
+    if let Some(id) = offline {
+        ClientboundNotification::UserPresence {
+            id: id.clone(),
+            online: false,
+        }
+        .publish(id);
+    }
+}
+
+pub fn publish(ids: Vec<String>, notification: ClientboundNotification) {
+    let mut targets = vec![];
+    {
+        let users = USERS.read().unwrap();
+        for id in ids {
+            // Block certain notifications from reaching users that aren't meant to see them.
+            match &notification {
+                ClientboundNotification::UserRelationship { id: user_id, .. }
+                | ClientboundNotification::UserSettingsUpdate { id: user_id, .. }
+                | ClientboundNotification::ChannelAck { user: user_id, .. } => {
+                    if &id != user_id {
+                        continue;
+                    }
+                }
+                _ => {}
+            }
+
+            if let Some(mut arr) = users.get_left(&id) {
+                targets.append(&mut arr);
+            }
+        }
+    }
+
+    let msg = Message::Text(serde_json::to_string(&notification).unwrap());
+
+    let connections = CONNECTIONS.lock().unwrap();
+    for target in targets {
+        if let Some(conn) = connections.get(&target) {
+            if let Err(_) = conn.unbounded_send(msg.clone()) {
+                debug!("Failed unbounded_send.");
+            }
+        }
+    }
+}
+
+pub fn is_online(user: &String) -> bool {
+    USERS.read().unwrap().get_left(&user).is_some()
+}

src/notifications/ws.rs

@@ -1,119 +0,0 @@
-use super::state::{self, StateResult};
-
-use serde_json::{from_str, json, Value};
-use std::env;
-use ulid::Ulid;
-use ws::{listen, CloseCode, Error, Handler, Handshake, Message, Result, Sender};
-
-struct Server {
-    sender: Sender,
-    user_id: Option<String>,
-    id: String,
-}
-
-impl Handler for Server {
-    fn on_open(&mut self, _: Handshake) -> Result<()> {
-        state::add_connection(self.id.clone(), self.sender.clone());
-        Ok(())
-    }
-
-    fn on_message(&mut self, msg: Message) -> Result<()> {
-        if let Message::Text(text) = msg {
-            if let Ok(data) = from_str(&text) as std::result::Result<Value, _> {
-                if let Value::String(packet_type) = &data["type"] {
-                    if packet_type == "authenticate" {
-                        if self.user_id.is_some() {
-                            self.sender.send(
-                                json!({
-                                    "type": "authenticate",
-                                    "success": false,
-                                    "error": "Already authenticated!"
-                                })
-                                .to_string(),
-                            )
-                        } else if let Value::String(token) = &data["token"] {
-                            let mut state = unsafe { state::DATA.get().unwrap().write().unwrap() };
-
-                            match state.try_authenticate(self.id.clone(), token.to_string()) {
-                                StateResult::Success(user_id) => {
-                                    self.user_id = Some(user_id);
-                                    self.sender.send(
-                                        json!({
-                                            "type": "authenticate",
-                                            "success": true,
-                                        })
-                                        .to_string(),
-                                    )
-                                }
-                                StateResult::DatabaseError => self.sender.send(
-                                    json!({
-                                        "type": "authenticate",
-                                        "success": false,
-                                        "error": "Had database error."
-                                    })
-                                    .to_string(),
-                                ),
-                                StateResult::InvalidToken => self.sender.send(
-                                    json!({
-                                        "type": "authenticate",
-                                        "success": false,
-                                        "error": "Invalid token."
-                                    })
-                                    .to_string(),
-                                ),
-                            }
-                        } else {
-                            self.sender.send(
-                                json!({
-                                    "type": "authenticate",
-                                    "success": false,
-                                    "error": "Token not present."
-                                })
-                                .to_string(),
-                            )
-                        }
-                    } else {
-                        Ok(())
-                    }
-                } else {
-                    Ok(())
-                }
-            } else {
-                Ok(())
-            }
-        } else {
-            Ok(())
-        }
-    }
-
-    fn on_close(&mut self, _code: CloseCode, _reason: &str) {
-        unsafe {
-            state::DATA
-                .get()
-                .unwrap()
-                .write()
-                .unwrap()
-                .disconnect(self.user_id.clone(), self.id.clone());
-        }
-
-        println!("User disconnected. [{}]", self.id);
-    }
-
-    fn on_error(&mut self, err: Error) {
-        println!("The server encountered an error: {:?}", err);
-    }
-}
-
-pub fn launch_server() {
-    state::init();
-
-    listen(
-        env::var("WS_HOST").unwrap_or("0.0.0.0:9999".to_string()),
-        |sender| Server {
-            sender,
-            user_id: None,
-            id: Ulid::new().to_string(),
-        },
-    )
-    .unwrap()
-}

src/routes/account.rs

@@ -1,293 +0,0 @@
-use super::Response;
-use crate::database;
-use crate::email;
-use crate::util::gen_token;
-
-use bcrypt::{hash, verify};
-use bson::{doc, from_bson, Bson::UtcDatetime};
-use chrono::prelude::*;
-use database::user::User;
-use rocket_contrib::json::Json;
-use serde::{Deserialize, Serialize};
-use ulid::Ulid;
-use validator::validate_email;
-
-#[derive(Serialize, Deserialize)]
-pub struct Create {
-    username: String,
-    password: String,
-    email: String,
-}
-
-/// create a new Revolt account
-/// (1) validate input
-/// 	[username] 2 to 32 characters
-/// 	[password] 8 to 72 characters
-/// 	[email]    validate against RFC
-/// (2) check email existence
-/// (3) add user and send email verification
-#[post("/create", data = "<info>")]
-pub fn create(info: Json<Create>) -> Response {
-    let col = database::get_collection("users");
-
-    if info.username.len() < 2 || info.username.len() > 32 {
-        return Response::NotAcceptable(
-            json!({ "error": "Username needs to be at least 2 chars and less than 32 chars." }),
-        );
-    }
-
-    if info.password.len() < 8 || info.password.len() > 72 {
-        return Response::NotAcceptable(
-            json!({ "error": "Password needs to be at least 8 chars and at most 72." }),
-        );
-    }
-
-    if !validate_email(info.email.clone()) {
-        return Response::UnprocessableEntity(json!({ "error": "Invalid email." }));
-    }
-
-    if let Some(_) = col
-        .find_one(doc! { "email": info.email.clone() }, None)
-        .expect("Failed user lookup")
-    {
-        return Response::Conflict(json!({ "error": "Email already in use!" }));
-    }
-
-    if let Ok(hashed) = hash(info.password.clone(), 10) {
-        let access_token = gen_token(92);
-        let code = gen_token(48);
-
-        match col.insert_one(
-            doc! {
-                "_id": Ulid::new().to_string(),
-                "email": info.email.clone(),
-                "username": info.username.clone(),
-                "password": hashed,
-                "access_token": access_token,
-                "email_verification": {
-                    "verified": false,
-                    "target": info.email.clone(),
-                    "expiry": UtcDatetime(Utc::now() + chrono::Duration::days(1)),
-                    "rate_limit": UtcDatetime(Utc::now() + chrono::Duration::minutes(1)),
-                    "code": code.clone(),
-                }
-            },
-            None,
-        ) {
-            Ok(_) => {
-                let sent = email::send_verification_email(info.email.clone(), code);
-
-                Response::Success(json!({
-                    "success": true,
-                    "email_sent": sent,
-                }))
-            }
-            Err(_) => {
-                Response::InternalServerError(json!({ "error": "Failed to create account." }))
-            }
-        }
-    } else {
-        Response::InternalServerError(json!({ "error": "Failed to hash." }))
-    }
-}
-
-/// verify an email for a Revolt account
-/// (1) check if code is valid
-/// (2) check if it expired yet
-/// (3) set account as verified
-#[get("/verify/<code>")]
-pub fn verify_email(code: String) -> Response {
-    let col = database::get_collection("users");
-
-    if let Some(u) = col
-        .find_one(doc! { "email_verification.code": code.clone() }, None)
-        .expect("Failed user lookup")
-    {
-        let user: User = from_bson(bson::Bson::Document(u)).expect("Failed to unwrap user.");
-        let ev = user.email_verification;
-
-        if Utc::now() > *ev.expiry.unwrap() {
-            Response::Gone(json!({
-                "success": false,
-                "error": "Token has expired!",
-            }))
-        } else {
-            let target = ev.target.unwrap();
-            col.update_one(
-                doc! { "_id": user.id },
-                doc! {
-                    "$unset": {
-                        "email_verification.code": "",
-                        "email_verification.expiry": "",
-                        "email_verification.target": "",
-                        "email_verification.rate_limit": "",
-                    },
-                    "$set": {
-                        "email_verification.verified": true,
-                        "email": target.clone(),
-                    },
-                },
-                None,
-            )
-            .expect("Failed to update user!");
-
-            email::send_welcome_email(target.to_string(), user.username);
-
-            Response::Redirect(
-                super::Redirect::to("https://example.com"), // ! FIXME; redirect to landing page
-            )
-        }
-    } else {
-        Response::BadRequest(json!({ "error": "Invalid code." }))
-    }
-}
-
-#[derive(Serialize, Deserialize)]
-pub struct Resend {
-    email: String,
-}
-
-/// resend a verification email
-/// (1) check if verification is pending for x email
-/// (2) check for rate limit
-/// (3) resend the email
-#[post("/resend", data = "<info>")]
-pub fn resend_email(info: Json<Resend>) -> Response {
-    let col = database::get_collection("users");
-
-    if let Some(u) = col
-        .find_one(
-            doc! { "email_verification.target": info.email.clone() },
-            None,
-        )
-        .expect("Failed user lookup.")
-    {
-        let user: User = from_bson(bson::Bson::Document(u)).expect("Failed to unwrap user.");
-        let ev = user.email_verification;
-
-        let expiry = ev.expiry.unwrap();
-        let rate_limit = ev.rate_limit.unwrap();
-
-        if Utc::now() < *rate_limit {
-            Response::TooManyRequests(
-                json!({ "error": "You are being rate limited, please try again in a while." }),
-            )
-        } else {
-            let mut new_expiry = UtcDatetime(Utc::now() + chrono::Duration::days(1));
-            if info.email.clone() != user.email {
-                if Utc::now() > *expiry {
-                    return Response::Gone(
-                        json!({ "error": "To help protect your account, please login and change your email again. The original request was made over one day ago." }),
-                    );
-                }
-
-                new_expiry = UtcDatetime(*expiry);
-            }
-
-            let code = gen_token(48);
-            col.update_one(
-					doc! { "_id": user.id },
-					doc! {
-						"$set": {
-							"email_verification.code": code.clone(),
-							"email_verification.expiry": new_expiry,
-							"email_verification.rate_limit": UtcDatetime(Utc::now() + chrono::Duration::minutes(1)),
-						},
-					},
-					None,
-				).expect("Failed to update user!");
-
-            match email::send_verification_email(info.email.to_string(), code) {
-                true => Response::Result(super::Status::Ok),
-                false => Response::InternalServerError(
-                    json!({ "success": false, "error": "Failed to send email! Likely an issue with the backend API." }),
-                ),
-            }
-        }
-    } else {
-        Response::NotFound(
-            json!({ "success": false, "error": "Email not found or pending verification!" }),
-        )
-    }
-}
-
-#[derive(Serialize, Deserialize)]
-pub struct Login {
-    email: String,
-    password: String,
-}
-
-/// login to a Revolt account
-/// (1) find user by email
-/// (2) verify password
-/// (3) return access token
-#[post("/login", data = "<info>")]
-pub fn login(info: Json<Login>) -> Response {
-    let col = database::get_collection("users");
-
-    if let Some(u) = col
-        .find_one(doc! { "email": info.email.clone() }, None)
-        .expect("Failed user lookup")
-    {
-        let user: User = from_bson(bson::Bson::Document(u)).expect("Failed to unwrap user.");
-
-        match verify(info.password.clone(), &user.password)
-            .expect("Failed to check hash of password.")
-        {
-            true => {
-                let token = match user.access_token {
-                    Some(t) => t.to_string(),
-                    None => {
-                        let token = gen_token(92);
-                        if col
-                            .update_one(
-                                doc! { "_id": &user.id },
-                                doc! { "$set": { "access_token": token.clone() } },
-                                None,
-                            )
-                            .is_err()
-                        {
-                            return Response::InternalServerError(
-                                json!({ "error": "Failed database operation." }),
-                            );
-                        }
-
-                        token
-                    }
-                };
-
-                Response::Success(json!({ "access_token": token, "id": user.id }))
-            }
-            false => Response::Unauthorized(json!({ "error": "Invalid password." })),
-        }
-    } else {
-        Response::NotFound(json!({ "error": "Email is not registered." }))
-    }
-}
-
-#[derive(Serialize, Deserialize)]
-pub struct Token {
-    token: String,
-}
-
-/// login to a Revolt account via token
-#[post("/token", data = "<info>")]
-pub fn token(info: Json<Token>) -> Response {
-    let col = database::get_collection("users");
-
-    if let Ok(result) = col.find_one(doc! { "access_token": info.token.clone() }, None) {
-        if let Some(user) = result {
-            Response::Success(json!({
-                "id": user.get_str("_id").unwrap(),
-            }))
-        } else {
-            Response::Unauthorized(json!({
-                "error": "Invalid token!",
-            }))
-        }
-    } else {
-        Response::InternalServerError(json!({
-            "error": "Failed database query.",
-        }))
-    }
-}

src/routes/channel.rs

@@ -1,682 +0,0 @@
-use super::Response;
-use crate::database::{
-    self, get_relationship, get_relationship_internal, message::Message, Permission,
-    PermissionCalculator, Relationship,
-};
-use crate::guards::auth::UserRef;
-use crate::guards::channel::ChannelRef;
-use crate::notifications::{
-    self,
-    events::{groups::*, guilds::ChannelDelete, message::*, Notification},
-};
-use crate::util::vec_to_set;
-
-use bson::{doc, from_bson, Bson, Bson::UtcDatetime};
-use chrono::prelude::*;
-use mongodb::options::FindOptions;
-use num_enum::TryFromPrimitive;
-use rocket_contrib::json::Json;
-use serde::{Deserialize, Serialize};
-use ulid::Ulid;
-
-const MAXGROUPSIZE: usize = 50;
-
-#[derive(Debug, TryFromPrimitive)]
-#[repr(usize)]
-pub enum ChannelType {
-    DM = 0,
-    GROUPDM = 1,
-    GUILDCHANNEL = 2,
-}
-
-macro_rules! with_permissions {
-    ($user: expr, $target: expr) => {{
-        let permissions = PermissionCalculator::new($user.clone())
-            .channel($target.clone())
-            .fetch_data();
-
-        let value = permissions.as_permission();
-        if !value.get_access() {
-            return None;
-        }
-
-        value
-    }};
-}
-
-#[derive(Serialize, Deserialize)]
-pub struct CreateGroup {
-    name: String,
-    nonce: String,
-    users: Vec<String>,
-}
-
-/// create a new group
-#[post("/create", data = "<info>")]
-pub fn create_group(user: UserRef, info: Json<CreateGroup>) -> Response {
-    let name: String = info.name.chars().take(32).collect();
-    let nonce: String = info.nonce.chars().take(32).collect();
-
-    let mut set = vec_to_set(&info.users);
-    set.insert(user.id.clone());
-
-    if set.len() > MAXGROUPSIZE {
-        return Response::BadRequest(json!({ "error": "Maximum group size is 50." }));
-    }
-
-    let col = database::get_collection("channels");
-    if let Some(_) = col.find_one(doc! { "nonce": nonce.clone() }, None).unwrap() {
-        return Response::BadRequest(json!({ "error": "Group already created!" }));
-    }
-
-    let mut query = vec![];
-    for item in &set {
-        if item == &user.id {
-            continue;
-        }
-
-        query.push(Bson::String(item.clone()));
-    }
-
-    if let Ok(result) = database::get_collection("users").find(
-        doc! {
-            "_id": {
-                "$in": &query
-            }
-        },
-        FindOptions::builder().limit(query.len() as i64).build(),
-    ) {
-        if result.count() != query.len() {
-            return Response::BadRequest(json!({ "error": "Specified non-existant user(s)." }));
-        }
-
-        let relationships = user.fetch_relationships();
-        for item in set {
-            if item == user.id {
-                continue;
-            }
-
-            if get_relationship_internal(&user.id, &item, &relationships) != Relationship::Friend {
-                return Response::BadRequest(json!({ "error": "Not friends with user(s)." }));
-            }
-        }
-
-        query.push(Bson::String(user.id.clone()));
-
-        let id = Ulid::new().to_string();
-        if col
-            .insert_one(
-                doc! {
-                    "_id": id.clone(),
-                    "nonce": nonce,
-                    "type": ChannelType::GROUPDM as u32,
-                    "recipients": &query,
-                    "name": name,
-                    "owner": &user.id,
-                },
-                None,
-            )
-            .is_ok()
-        {
-            Response::Success(json!({ "id": id }))
-        } else {
-            Response::InternalServerError(json!({ "error": "Failed to create guild channel." }))
-        }
-    } else {
-        Response::InternalServerError(json!({ "error": "Failed to validate users." }))
-    }
-}
-
-/// fetch channel information
-#[get("/<target>")]
-pub fn channel(user: UserRef, target: ChannelRef) -> Option<Response> {
-    with_permissions!(user, target);
-
-    match target.channel_type {
-        0 => Some(Response::Success(json!({
-            "id": target.id,
-            "type": target.channel_type,
-            "last_message": target.last_message,
-            "recipients": target.recipients,
-        }))),
-        1 => {
-            if let Some(info) = target.fetch_data(doc! {
-                "name": 1,
-                "description": 1,
-                "owner": 1,
-            }) {
-                Some(Response::Success(json!({
-                    "id": target.id,
-                    "type": target.channel_type,
-                    "last_message": target.last_message,
-                    "recipients": target.recipients,
-                    "name": info.get_str("name").unwrap(),
-                    "owner": info.get_str("owner").unwrap(),
-                    "description": info.get_str("description").unwrap_or(""),
-                })))
-            } else {
-                None
-            }
-        }
-        2 => {
-            if let Some(info) = target.fetch_data(doc! {
-                "name": 1,
-                "description": 1,
-            }) {
-                Some(Response::Success(json!({
-                    "id": target.id,
-                    "type": target.channel_type,
-                    "guild": target.guild,
-                    "name": info.get_str("name").unwrap(),
-                    "description": info.get_str("description").unwrap_or(""),
-                })))
-            } else {
-                None
-            }
-        }
-        _ => unreachable!(),
-    }
-}
-
-/// [groups] add user to channel
-#[put("/<target>/recipients/<member>")]
-pub fn add_member(user: UserRef, target: ChannelRef, member: UserRef) -> Option<Response> {
-    if target.channel_type != 1 {
-        return Some(Response::BadRequest(json!({ "error": "Not a group DM." })));
-    }
-
-    with_permissions!(user, target);
-
-    let recp = target.recipients.as_ref().unwrap();
-    if recp.len() == 50 {
-        return Some(Response::BadRequest(
-            json!({ "error": "Maximum group size is 50." }),
-        ));
-    }
-
-    let set = vec_to_set(&recp);
-    if set.get(&member.id).is_some() {
-        return Some(Response::BadRequest(
-            json!({ "error": "User already in group!" }),
-        ));
-    }
-
-    match get_relationship(&user, &member) {
-        Relationship::Friend => {
-            if database::get_collection("channels")
-                .update_one(
-                    doc! { "_id": target.id.clone() },
-                    doc! {
-                        "$push": {
-                            "recipients": &member.id
-                        }
-                    },
-                    None,
-                )
-                .is_ok()
-            {
-                if (Message {
-                    id: Ulid::new().to_string(),
-                    nonce: None,
-                    channel: target.id.clone(),
-                    author: "system".to_string(),
-                    content: format!("<@{}> added <@{}> to the group.", &user.id, &member.id),
-                    edited: None,
-                    previous_content: vec![],
-                })
-                .send(&target)
-                {
-                    notifications::send_message_given_channel(
-                        Notification::group_user_join(UserJoin {
-                            id: target.id.clone(),
-                            user: member.id.clone(),
-                        }),
-                        &target,
-                    );
-
-                    Some(Response::Result(super::Status::Ok))
-                } else {
-                    Some(Response::PartialStatus(
-                        json!({ "error": "Failed to send join message, but user has been added." }),
-                    ))
-                }
-            } else {
-                Some(Response::InternalServerError(
-                    json!({ "error": "Failed to add user to group." }),
-                ))
-            }
-        }
-        _ => Some(Response::BadRequest(
-            json!({ "error": "Not friends with user." }),
-        )),
-    }
-}
-
-/// [groups] remove user from channel
-#[delete("/<target>/recipients/<member>")]
-pub fn remove_member(user: UserRef, target: ChannelRef, member: UserRef) -> Option<Response> {
-    if target.channel_type != 1 {
-        return Some(Response::BadRequest(json!({ "error": "Not a group DM." })));
-    }
-
-    if &user.id == &member.id {
-        return Some(Response::BadRequest(
-            json!({ "error": "Cannot kick yourself, leave the channel instead." }),
-        ));
-    }
-
-    let permissions = with_permissions!(user, target);
-
-    if !permissions.get_kick_members() {
-        return Some(Response::LackingPermission(Permission::KickMembers));
-    }
-
-    let set = vec_to_set(target.recipients.as_ref().unwrap());
-    if set.get(&member.id).is_none() {
-        return Some(Response::BadRequest(
-            json!({ "error": "User not in group!" }),
-        ));
-    }
-
-    if database::get_collection("channels")
-        .update_one(
-            doc! { "_id": &target.id },
-            doc! {
-                "$pull": {
-                    "recipients": &member.id
-                }
-            },
-            None,
-        )
-        .is_ok()
-    {
-        if (Message {
-            id: Ulid::new().to_string(),
-            nonce: None,
-            channel: target.id.clone(),
-            author: "system".to_string(),
-            content: format!("<@{}> removed <@{}> from the group.", &user.id, &member.id),
-            edited: None,
-            previous_content: vec![],
-        })
-        .send(&target)
-        {
-            notifications::send_message_given_channel(
-                Notification::group_user_leave(UserLeave {
-                    id: target.id.clone(),
-                    user: member.id.clone(),
-                }),
-                &target,
-            );
-
-            Some(Response::Result(super::Status::Ok))
-        } else {
-            Some(Response::PartialStatus(
-                json!({ "error": "Failed to send join message, but user has been removed." }),
-            ))
-        }
-    } else {
-        Some(Response::InternalServerError(
-            json!({ "error": "Failed to add user to group." }),
-        ))
-    }
-}
-
-/// delete channel
-/// or leave group DM
-/// or close DM conversation
-#[delete("/<target>")]
-pub fn delete(user: UserRef, target: ChannelRef) -> Option<Response> {
-    let permissions = with_permissions!(user, target);
-
-    if !permissions.get_manage_channels() {
-        return Some(Response::LackingPermission(Permission::ManageChannels));
-    }
-
-    let col = database::get_collection("channels");
-    let target_id = target.id.clone();
-
-    let try_delete = || {
-        let messages = database::get_collection("messages");
-
-        if messages
-            .delete_many(doc! { "channel": &target_id }, None)
-            .is_ok()
-        {
-            if col.delete_one(doc! { "_id": &target_id }, None).is_ok() {
-                Some(Response::Result(super::Status::Ok))
-            } else {
-                Some(Response::InternalServerError(
-                    json!({ "error": "Failed to delete channel." }),
-                ))
-            }
-        } else {
-            Some(Response::InternalServerError(
-                json!({ "error": "Failed to delete messages." }),
-            ))
-        }
-    };
-
-    match target.channel_type {
-        0 => {
-            if col
-                .update_one(
-                    doc! { "_id": &target_id },
-                    doc! { "$set": { "active": false } },
-                    None,
-                )
-                .is_ok()
-            {
-                Some(Response::Result(super::Status::Ok))
-            } else {
-                Some(Response::InternalServerError(
-                    json!({ "error": "Failed to close channel." }),
-                ))
-            }
-        }
-        1 => {
-            let mut recipients = vec_to_set(
-                target
-                    .recipients
-                    .as_ref()
-                    .expect("Missing recipients on Group DM."),
-            );
-            let owner = target.owner.as_ref().expect("Missing owner on Group DM.");
-
-            if recipients.len() == 1 {
-                try_delete()
-            } else {
-                recipients.remove(&user.id);
-                let new_owner = if owner == &user.id {
-                    recipients.iter().next().unwrap()
-                } else {
-                    &owner
-                };
-
-                if col
-                    .update_one(
-                        doc! { "_id": target_id },
-                        doc! {
-                            "$set": {
-                                "owner": new_owner,
-                            },
-                            "$pull": {
-                                "recipients": &user.id,
-                            }
-                        },
-                        None,
-                    )
-                    .is_ok()
-                {
-                    if (Message {
-                        id: Ulid::new().to_string(),
-                        nonce: None,
-                        channel: target.id.clone(),
-                        author: "system".to_string(),
-                        content: format!("<@{}> left the group.", &user.id),
-                        edited: None,
-                        previous_content: vec![],
-                    })
-                    .send(&target)
-                    {
-                        notifications::send_message_given_channel(
-                            Notification::group_user_leave(UserLeave {
-                                id: target.id.clone(),
-                                user: user.id.clone(),
-                            }),
-                            &target,
-                        );
-
-                        Some(Response::Result(super::Status::Ok))
-                    } else {
-                        Some(Response::PartialStatus(
-                            json!({ "error": "Failed to send leave message, but you have left the group." }),
-                        ))
-                    }
-                } else {
-                    Some(Response::InternalServerError(
-                        json!({ "error": "Failed to remove you from the group." }),
-                    ))
-                }
-            }
-        }
-        2 => {
-            let guild_id = target.guild.unwrap();
-            if database::get_collection("guilds")
-                .update_one(
-                    doc! { "_id": &guild_id },
-                    doc! {
-                        "$pull": {
-                            "invites": {
-                                "channel": &target.id
-                            }
-                        }
-                    },
-                    None,
-                )
-                .is_ok()
-            {
-                notifications::send_message_threaded(
-                    None,
-                    guild_id.clone(),
-                    Notification::guild_channel_delete(ChannelDelete {
-                        id: guild_id.clone(),
-                        channel: target.id.clone(),
-                    }),
-                );
-
-                try_delete()
-            } else {
-                Some(Response::InternalServerError(
-                    json!({ "error": "Failed to remove invites." }),
-                ))
-            }
-        }
-        _ => Some(Response::InternalServerError(
-            json!({ "error": "Unknown error has occurred." }),
-        )),
-    }
-}
-
-/// fetch channel messages
-#[get("/<target>/messages")]
-pub fn messages(user: UserRef, target: ChannelRef) -> Option<Response> {
-    let permissions = with_permissions!(user, target);
-
-    if !permissions.get_read_messages() {
-        return Some(Response::LackingPermission(Permission::ReadMessages));
-    }
-
-    let col = database::get_collection("messages");
-    let result = col.find(doc! { "channel": target.id }, None).unwrap();
-
-    let mut messages = Vec::new();
-    for item in result {
-        let message: Message =
-            from_bson(bson::Bson::Document(item.unwrap())).expect("Failed to unwrap message.");
-        messages.push(json!({
-            "id": message.id,
-            "author": message.author,
-            "content": message.content,
-            "edited": if let Some(t) = message.edited { Some(t.timestamp()) } else { None }
-        }));
-    }
-
-    Some(Response::Success(json!(messages)))
-}
-
-#[derive(Serialize, Deserialize)]
-pub struct SendMessage {
-    content: String,
-    nonce: String,
-}
-
-/// send a message to a channel
-#[post("/<target>/messages", data = "<message>")]
-pub fn send_message(
-    user: UserRef,
-    target: ChannelRef,
-    message: Json<SendMessage>,
-) -> Option<Response> {
-    let permissions = with_permissions!(user, target);
-
-    if !permissions.get_send_messages() {
-        if target.channel_type == 0 {
-            return Some(Response::LackingPermission(Permission::SendDirectMessages));
-        }
-
-        return Some(Response::LackingPermission(Permission::SendMessages));
-    }
-
-    let content: String = message.content.chars().take(2000).collect();
-    let nonce: String = message.nonce.chars().take(32).collect();
-
-    let col = database::get_collection("messages");
-    if col
-        .find_one(doc! { "nonce": nonce.clone() }, None)
-        .unwrap()
-        .is_some()
-    {
-        return Some(Response::BadRequest(
-            json!({ "error": "Message already sent!" }),
-        ));
-    }
-
-    let id = Ulid::new().to_string();
-    let message = Message {
-        id: id.clone(),
-        nonce: Some(nonce),
-        channel: target.id.clone(),
-        author: user.id,
-        content,
-        edited: None,
-        previous_content: vec![],
-    };
-
-    if message.send(&target) {
-        Some(Response::Success(json!({ "id": id })))
-    } else {
-        Some(Response::BadRequest(
-            json!({ "error": "Failed to send message." }),
-        ))
-    }
-}
-
-/// get a message
-#[get("/<target>/messages/<message>")]
-pub fn get_message(user: UserRef, target: ChannelRef, message: Message) -> Option<Response> {
-    let permissions = with_permissions!(user, target);
-
-    if !permissions.get_read_messages() {
-        return Some(Response::LackingPermission(Permission::ReadMessages));
-    }
-
-    // ! CHECK IF USER HAS PERMISSION TO VIEW EDITS OF MESSAGES
-    let mut entries = vec![];
-    for entry in message.previous_content {
-        entries.push(json!({
-            "content": entry.content,
-            "time": entry.time.timestamp(),
-        }));
-    }
-
-    Some(Response::Success(json!({
-        "id": message.id,
-        "author": message.author,
-        "content": message.content,
-        "edited": if let Some(t) = message.edited { Some(t.timestamp()) } else { None },
-        "previous_content": entries,
-    })))
-}
-
-#[derive(Serialize, Deserialize)]
-pub struct EditMessage {
-    content: String,
-}
-
-/// edit a message
-#[patch("/<target>/messages/<message>", data = "<edit>")]
-pub fn edit_message(
-    user: UserRef,
-    target: ChannelRef,
-    message: Message,
-    edit: Json<EditMessage>,
-) -> Option<Response> {
-    with_permissions!(user, target);
-
-    if message.author != user.id {
-        return Some(Response::Unauthorized(
-            json!({ "error": "You did not send this message." }),
-        ));
-    }
-
-    let col = database::get_collection("messages");
-    let time = if let Some(edited) = message.edited {
-        edited.0
-    } else {
-        Ulid::from_string(&message.id).unwrap().datetime()
-    };
-
-    let edited = Utc::now();
-    match col.update_one(
-        doc! { "_id": message.id.clone() },
-        doc! {
-            "$set": {
-                "content": edit.content.clone(),
-                "edited": UtcDatetime(edited)
-            },
-            "$push": {
-                "previous_content": {
-                    "content": &message.content,
-                    "time": time,
-                }
-            },
-        },
-        None,
-    ) {
-        Ok(_) => {
-            notifications::send_message_given_channel(
-                Notification::message_edit(Edit {
-                    id: message.id.clone(),
-                    content: message.content,
-                }),
-                &target,
-            );
-
-            Some(Response::Result(super::Status::Ok))
-        }
-        Err(_) => Some(Response::InternalServerError(
-            json!({ "error": "Failed to update message." }),
-        )),
-    }
-}
-
-/// delete a message
-#[delete("/<target>/messages/<message>")]
-pub fn delete_message(user: UserRef, target: ChannelRef, message: Message) -> Option<Response> {
-    let permissions = with_permissions!(user, target);
-
-    if !permissions.get_manage_messages() {
-        if message.author != user.id {
-            return Some(Response::LackingPermission(Permission::ManageMessages));
-        }
-    }
-
-    let col = database::get_collection("messages");
-
-    match col.delete_one(doc! { "_id": &message.id }, None) {
-        Ok(_) => {
-            notifications::send_message_given_channel(
-                Notification::message_delete(Delete {
-                    id: message.id.clone(),
-                }),
-                &target,
-            );
-
-            Some(Response::Result(super::Status::Ok))
-        }
-        Err(_) => Some(Response::InternalServerError(
-            json!({ "error": "Failed to delete message." }),
-        )),
-    }
-}

src/routes/channels/channel_ack.rs

@@ -0,0 +1,52 @@
+use crate::database::*;
+use crate::notifications::events::ClientboundNotification;
+use crate::util::result::{Error, Result};
+
+use mongodb::bson::doc;
+use mongodb::options::UpdateOptions;
+
+#[put("/<target>/ack/<message>")]
+pub async fn req(user: User, target: Ref, message: Ref) -> Result<()> {
+    let target = target.fetch_channel().await?;
+
+    let perm = permissions::PermissionCalculator::new(&user)
+        .with_channel(&target)
+        .for_channel()
+        .await?;
+
+    if !perm.get_view() {
+        Err(Error::MissingPermission)?
+    }
+
+    let id = target.id();
+    get_collection("channel_unreads")
+        .update_one(
+            doc! {
+                "_id.channel": id,
+                "_id.user": &user.id
+            },
+            doc! {
+                "$unset": {
+                    "mentions": 1
+                },
+                "$set": {
+                    "last_id": &message.id
+                }
+            },
+            UpdateOptions::builder().upsert(true).build(),
+        )
+        .await
+        .map_err(|_| Error::DatabaseError {
+            operation: "update_one",
+            with: "channel_unreads",
+        })?;
+
+    ClientboundNotification::ChannelAck {
+        id: id.to_string(),
+        user: user.id.clone(),
+        message_id: message.id,
+    }
+    .publish(user.id);
+
+    Ok(())
+}

src/routes/channels/delete_channel.rs

@@ -0,0 +1,116 @@
+use crate::util::result::{Error, Result};
+use crate::{database::*, notifications::events::ClientboundNotification};
+
+use mongodb::bson::doc;
+
+#[delete("/<target>")]
+pub async fn req(user: User, target: Ref) -> Result<()> {
+    let target = target.fetch_channel().await?;
+
+    let perm = permissions::PermissionCalculator::new(&user)
+        .with_channel(&target)
+        .for_channel()
+        .await?;
+
+    if !perm.get_view() {
+        Err(Error::MissingPermission)?
+    }
+
+    match &target {
+        Channel::SavedMessages { .. } => Err(Error::NoEffect),
+        Channel::DirectMessage { .. } => {
+            get_collection("channels")
+                .update_one(
+                    doc! {
+                        "_id": target.id()
+                    },
+                    doc! {
+                        "$set": {
+                            "active": false
+                        }
+                    },
+                    None,
+                )
+                .await
+                .map_err(|_| Error::DatabaseError {
+                    operation: "update_one",
+                    with: "channel",
+                })?;
+
+            Ok(())
+        }
+        Channel::Group {
+            id,
+            owner,
+            recipients,
+            ..
+        } => {
+            if &user.id == owner {
+                if let Some(new_owner) = recipients.iter().find(|x| *x != &user.id) {
+                    get_collection("channels")
+                        .update_one(
+                            doc! {
+                                "_id": &id
+                            },
+                            doc! {
+                                "$set": {
+                                    "owner": new_owner
+                                },
+                                "$pull": {
+                                    "recipients": &user.id
+                                }
+                            },
+                            None,
+                        )
+                        .await
+                        .map_err(|_| Error::DatabaseError {
+                            operation: "update_one",
+                            with: "channel",
+                        })?;
+
+                    target.publish_update(json!({ "owner": new_owner })).await?;
+                } else {
+                    return target.delete().await;
+                }
+            } else {
+                get_collection("channels")
+                    .update_one(
+                        doc! {
+                            "_id": &id
+                        },
+                        doc! {
+                            "$pull": {
+                                "recipients": &user.id
+                            }
+                        },
+                        None,
+                    )
+                    .await
+                    .map_err(|_| Error::DatabaseError {
+                        operation: "update_one",
+                        with: "channel",
+                    })?;
+            }
+
+            ClientboundNotification::ChannelGroupLeave {
+                id: id.clone(),
+                user: user.id.clone(),
+            }
+            .publish(id.clone());
+
+            Content::SystemMessage(SystemMessage::UserLeft { id: user.id })
+                .send_as_system(&target)
+                .await
+                .ok();
+
+            Ok(())
+        }
+        Channel::TextChannel { .. } => {
+            if perm.get_manage_channel() {
+                target.delete().await
+            } else {
+                Err(Error::MissingPermission)
+            }
+        }
+    }
+}

src/routes/channels/edit_channel.rs

@@ -0,0 +1,151 @@
+use crate::notifications::events::ClientboundNotification;
+use crate::util::result::{Error, Result};
+use crate::{database::*, notifications::events::RemoveChannelField};
+
+use mongodb::bson::{doc, to_document};
+use rocket_contrib::json::Json;
+use serde::{Deserialize, Serialize};
+use validator::Validate;
+
+#[derive(Validate, Serialize, Deserialize)]
+pub struct Data {
+    #[validate(length(min = 1, max = 32))]
+    #[serde(skip_serializing_if = "Option::is_none")]
+    name: Option<String>,
+    #[validate(length(min = 0, max = 1024))]
+    #[serde(skip_serializing_if = "Option::is_none")]
+    description: Option<String>,
+    #[validate(length(min = 1, max = 128))]
+    icon: Option<String>,
+    remove: Option<RemoveChannelField>,
+}
+
+#[patch("/<target>", data = "<data>")]
+pub async fn req(user: User, target: Ref, data: Json<Data>) -> Result<()> {
+    let data = data.into_inner();
+    data.validate()
+        .map_err(|error| Error::FailedValidation { error })?;
+
+    if data.name.is_none()
+        && data.description.is_none()
+        && data.icon.is_none()
+        && data.remove.is_none()
+    {
+        return Ok(());
+    }
+
+    let target = target.fetch_channel().await?;
+    let perm = permissions::PermissionCalculator::new(&user)
+        .with_channel(&target)
+        .for_channel()
+        .await?;
+
+    if !perm.get_manage_channel() {
+        Err(Error::MissingPermission)?
+    }
+
+    match &target {
+        Channel::Group { id, icon, .. } | Channel::TextChannel { id, icon, .. } => {
+            let mut set = doc! {};
+            let mut unset = doc! {};
+
+            let mut remove_icon = false;
+            if let Some(remove) = &data.remove {
+                match remove {
+                    RemoveChannelField::Icon => {
+                        unset.insert("icon", 1);
+                        remove_icon = true;
+                    }
+                    RemoveChannelField::Description => {
+                        unset.insert("description", 1);
+                    }
+                }
+            }
+
+            if let Some(name) = &data.name {
+                set.insert("name", name);
+            }
+
+            if let Some(description) = &data.description {
+                set.insert("description", description);
+            }
+
+            if let Some(attachment_id) = &data.icon {
+                let attachment =
+                    File::find_and_use(&attachment_id, "icons", "object", target.id()).await?;
+                set.insert(
+                    "icon",
+                    to_document(&attachment).map_err(|_| Error::DatabaseError {
+                        operation: "to_document",
+                        with: "attachment",
+                    })?,
+                );
+
+                remove_icon = true;
+            }
+
+            let mut operations = doc! {};
+            if set.len() > 0 {
+                operations.insert("$set", &set);
+            }
+
+            if unset.len() > 0 {
+                operations.insert("$unset", unset);
+            }
+
+            if operations.len() > 0 {
+                get_collection("channels")
+                    .update_one(doc! { "_id": &id }, operations, None)
+                    .await
+                    .map_err(|_| Error::DatabaseError {
+                        operation: "update_one",
+                        with: "channel",
+                    })?;
+            }
+
+            ClientboundNotification::ChannelUpdate {
+                id: id.clone(),
+                data: json!(set),
+                clear: data.remove,
+            }
+            .publish(id.clone());
+
+            if let Channel::Group { .. } = &target {
+                if let Some(name) = data.name {
+                    Content::SystemMessage(SystemMessage::ChannelRenamed {
+                        name,
+                        by: user.id.clone(),
+                    })
+                    .send_as_system(&target)
+                    .await
+                    .ok();
+                }
+
+                if let Some(_) = data.description {
+                    Content::SystemMessage(SystemMessage::ChannelDescriptionChanged {
+                        by: user.id.clone(),
+                    })
+                    .send_as_system(&target)
+                    .await
+                    .ok();
+                }
+
+                if let Some(_) = data.icon {
+                    Content::SystemMessage(SystemMessage::ChannelIconChanged { by: user.id })
+                        .send_as_system(&target)
+                        .await
+                        .ok();
+                }
+            }
+
+            if remove_icon {
+                if let Some(old_icon) = icon {
+                    old_icon.delete().await?;
+                }
+            }
+
+            Ok(())
+        }
+        _ => Err(Error::InvalidOperation),
+    }
+}

src/routes/channels/fetch_channel.rs

@@ -0,0 +1,20 @@
+use crate::database::*;
+use crate::util::result::{Error, Result};
+
+use rocket_contrib::json::JsonValue;
+
+#[get("/<target>")]
+pub async fn req(user: User, target: Ref) -> Result<JsonValue> {
+    let target = target.fetch_channel().await?;
+
+    let perm = permissions::PermissionCalculator::new(&user)
+        .with_channel(&target)
+        .for_channel()
+        .await?;
+
+    if !perm.get_view() {
+        Err(Error::MissingPermission)?
+    }
+
+    Ok(json!(target))
+}

src/routes/channels/fetch_members.rs

@@ -0,0 +1,23 @@
+use crate::database::*;
+use crate::util::result::{Error, Result};
+
+use rocket_contrib::json::JsonValue;
+
+#[get("/<target>/members")]
+pub async fn req(user: User, target: Ref) -> Result<JsonValue> {
+    let target = target.fetch_channel().await?;
+
+    let perm = permissions::PermissionCalculator::new(&user)
+        .with_channel(&target)
+        .for_channel()
+        .await?;
+    if !perm.get_view() {
+        Err(Error::MissingPermission)?
+    }
+
+    if let Channel::Group { recipients, .. } = target {
+        Ok(json!(user.fetch_multiple_users(recipients).await?))
+    } else {
+        Err(Error::InvalidOperation)
+    }
+}

src/routes/channels/group_add_member.rs

@@ -0,0 +1,70 @@
+use crate::util::result::{Error, Result};
+use crate::util::variables::MAX_GROUP_SIZE;
+use crate::{database::*, notifications::events::ClientboundNotification};
+
+use mongodb::bson::doc;
+
+#[put("/<target>/recipients/<member>")]
+pub async fn req(user: User, target: Ref, member: Ref) -> Result<()> {
+    if get_relationship(&user, &member.id) != RelationshipStatus::Friend {
+        Err(Error::NotFriends)?
+    }
+
+    let channel = target.fetch_channel().await?;
+    let perm = permissions::PermissionCalculator::new(&user)
+        .with_channel(&channel)
+        .for_channel()
+        .await?;
+
+    if !perm.get_invite_others() {
+        Err(Error::MissingPermission)?
+    }
+
+    if let Channel::Group { id, recipients, .. } = &channel {
+        if recipients.len() >= *MAX_GROUP_SIZE {
+            Err(Error::GroupTooLarge {
+                max: *MAX_GROUP_SIZE,
+            })?
+        }
+
+        if recipients.iter().find(|x| *x == &member.id).is_some() {
+            Err(Error::AlreadyInGroup)?
+        }
+
+        get_collection("channels")
+            .update_one(
+                doc! {
+                    "_id": &id
+                },
+                doc! {
+                    "$push": {
+                        "recipients": &member.id
+                    }
+                },
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "update_one",
+                with: "channel",
+            })?;
+
+        ClientboundNotification::ChannelGroupJoin {
+            id: id.clone(),
+            user: member.id.clone(),
+        }
+        .publish(id.clone());
+
+        Content::SystemMessage(SystemMessage::UserAdded {
+            id: member.id,
+            by: user.id,
+        })
+        .send_as_system(&channel)
+        .await
+        .ok();
+
+        Ok(())
+    } else {
+        Err(Error::InvalidOperation)
+    }
+}

src/routes/channels/group_create.rs

@@ -0,0 +1,81 @@
+use crate::database::*;
+use crate::util::result::{Error, Result};
+use crate::util::variables::MAX_GROUP_SIZE;
+
+use mongodb::bson::doc;
+use rocket_contrib::json::{Json, JsonValue};
+use serde::{Deserialize, Serialize};
+use std::collections::HashSet;
+use std::iter::FromIterator;
+use ulid::Ulid;
+use validator::Validate;
+
+#[derive(Validate, Serialize, Deserialize)]
+pub struct Data {
+    #[validate(length(min = 1, max = 32))]
+    name: String,
+    #[validate(length(min = 0, max = 1024))]
+    description: Option<String>,
+    // Maximum length of 36 allows both ULIDs and UUIDs.
+    #[validate(length(min = 1, max = 36))]
+    nonce: String,
+    users: Vec<String>,
+}
+
+#[post("/create", data = "<info>")]
+pub async fn req(user: User, info: Json<Data>) -> Result<JsonValue> {
+    let info = info.into_inner();
+    info.validate()
+        .map_err(|error| Error::FailedValidation { error })?;
+
+    let mut set: HashSet<String> = HashSet::from_iter(info.users.iter().cloned());
+    set.insert(user.id.clone());
+
+    if set.len() > *MAX_GROUP_SIZE {
+        Err(Error::GroupTooLarge {
+            max: *MAX_GROUP_SIZE,
+        })?
+    }
+
+    for target in &set {
+        match get_relationship(&user, target) {
+            RelationshipStatus::Friend | RelationshipStatus::User => {}
+            _ => {
+                return Err(Error::NotFriends);
+            }
+        }
+    }
+
+    if get_collection("channels")
+        .find_one(
+            doc! {
+                "nonce": &info.nonce
+            },
+            None,
+        )
+        .await
+        .map_err(|_| Error::DatabaseError {
+            operation: "find_one",
+            with: "channel",
+        })?
+        .is_some()
+    {
+        Err(Error::DuplicateNonce)?
+    }
+
+    let id = Ulid::new().to_string();
+    let channel = Channel::Group {
+        id,
+        nonce: Some(info.nonce),
+        name: info.name,
+        description: info.description,
+        owner: user.id,
+        recipients: set.into_iter().collect::<Vec<String>>(),
+        icon: None,
+        last_message: None,
+    };
+
+    channel.clone().publish().await?;
+
+    Ok(json!(channel))
+}

src/routes/channels/group_remove_member.rs

@@ -0,0 +1,66 @@
+use crate::util::result::{Error, Result};
+use crate::{database::*, notifications::events::ClientboundNotification};
+
+use mongodb::bson::doc;
+
+#[delete("/<target>/recipients/<member>")]
+pub async fn req(user: User, target: Ref, member: Ref) -> Result<()> {
+    if &user.id == &member.id {
+        Err(Error::CannotRemoveYourself)?
+    }
+
+    let channel = target.fetch_channel().await?;
+
+    if let Channel::Group {
+        id,
+        owner,
+        recipients,
+        ..
+    } = &channel
+    {
+        if &user.id != owner {
+            // figure out if we want to use perm system here
+            Err(Error::MissingPermission)?
+        }
+
+        if recipients.iter().find(|x| *x == &member.id).is_none() {
+            Err(Error::NotInGroup)?
+        }
+
+        get_collection("channels")
+            .update_one(
+                doc! {
+                    "_id": &id
+                },
+                doc! {
+                    "$pull": {
+                        "recipients": &member.id
+                    }
+                },
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "update_one",
+                with: "channel",
+            })?;
+
+        ClientboundNotification::ChannelGroupLeave {
+            id: id.clone(),
+            user: member.id.clone(),
+        }
+        .publish(id.clone());
+
+        Content::SystemMessage(SystemMessage::UserRemove {
+            id: member.id,
+            by: user.id,
+        })
+        .send_as_system(&channel)
+        .await
+        .ok();
+
+        Ok(())
+    } else {
+        Err(Error::InvalidOperation)
+    }
+}

src/routes/channels/invite_create.rs

@@ -0,0 +1,47 @@
+use crate::database::*;
+use crate::util::result::{Error, Result};
+
+use mongodb::bson::doc;
+use nanoid::nanoid;
+use rocket_contrib::json::JsonValue;
+
+lazy_static! {
+    static ref ALPHABET: [char; 54] = [
+        '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
+        'J', 'K', 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd',
+        'e', 'f', 'g', 'h', 'j', 'k', 'm', 'n', 'p', 'q', 'r', 's', 't', 'v', 'w', 'x', 'y', 'z'
+    ];
+}
+
+#[post("/<target>/invites")]
+pub async fn req(user: User, target: Ref) -> Result<JsonValue> {
+    let target = target.fetch_channel().await?;
+    let perm = permissions::PermissionCalculator::new(&user)
+        .with_channel(&target)
+        .for_channel()
+        .await?;
+
+    if !perm.get_invite_others() {
+        return Err(Error::MissingPermission);
+    }
+
+    let code = nanoid!(8, &*ALPHABET);
+    match &target {
+        Channel::Group { .. } => {
+            unimplemented!()
+        }
+        Channel::TextChannel { id, server, .. } => {
+            Invite::Server {
+                code: code.clone(),
+                creator: user.id,
+                server: server.clone(),
+                channel: id.clone(),
+            }
+            .save()
+            .await?;
+
+            Ok(json!({ "code": code }))
+        }
+        _ => Err(Error::InvalidOperation),
+    }
+}

src/routes/channels/join_call.rs

@@ -0,0 +1,91 @@
+use crate::database::*;
+use crate::util::result::{Error, Result};
+use crate::util::variables::{USE_VOSO, VOSO_MANAGE_TOKEN, VOSO_URL};
+
+use rocket_contrib::json::JsonValue;
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize)]
+struct CreateUserResponse {
+    token: String,
+}
+
+#[post("/<target>/join_call")]
+pub async fn req(user: User, target: Ref) -> Result<JsonValue> {
+    if !*USE_VOSO {
+        return Err(Error::VosoUnavailable);
+    }
+
+    let target = target.fetch_channel().await?;
+    match target {
+        Channel::SavedMessages { .. } | Channel::TextChannel { .. } => {
+            return Err(Error::CannotJoinCall)
+        }
+        _ => {}
+    }
+
+    let perm = permissions::PermissionCalculator::new(&user)
+        .with_channel(&target)
+        .for_channel()
+        .await?;
+
+    if !perm.get_voice_call() {
+        return Err(Error::MissingPermission);
+    }
+
+    // To join a call:
+    // - Check if the room exists.
+    // - If not, create it.
+    let client = reqwest::Client::new();
+    let result = client
+        .get(&format!("{}/room/{}", *VOSO_URL, target.id()))
+        .header(
+            reqwest::header::AUTHORIZATION,
+            VOSO_MANAGE_TOKEN.to_string(),
+        )
+        .send()
+        .await;
+
+    match result {
+        Err(_) => return Err(Error::VosoUnavailable),
+        Ok(result) => match result.status() {
+            reqwest::StatusCode::OK => (),
+            reqwest::StatusCode::NOT_FOUND => {
+                if let Err(_) = client
+                    .post(&format!("{}/room/{}", *VOSO_URL, target.id()))
+                    .header(
+                        reqwest::header::AUTHORIZATION,
+                        VOSO_MANAGE_TOKEN.to_string(),
+                    )
+                    .send()
+                    .await
+                {
+                    return Err(Error::VosoUnavailable);
+                }
+            }
+            _ => return Err(Error::VosoUnavailable),
+        },
+    }
+
+    // Then create a user for the room.
+    if let Ok(response) = client
+        .post(&format!(
+            "{}/room/{}/user/{}",
+            *VOSO_URL,
+            target.id(),
+            user.id
+        ))
+        .header(
+            reqwest::header::AUTHORIZATION,
+            VOSO_MANAGE_TOKEN.to_string(),
+        )
+        .send()
+        .await
+    {
+        let res: CreateUserResponse = response.json().await.map_err(|_| Error::InvalidOperation)?;
+
+        Ok(json!(res))
+    } else {
+        Err(Error::VosoUnavailable)
+    }
+}

src/routes/channels/message_delete.rs

@@ -0,0 +1,27 @@
+use crate::database::*;
+use crate::util::result::{Error, Result};
+
+use mongodb::bson::doc;
+
+#[delete("/<target>/messages/<msg>")]
+pub async fn req(user: User, target: Ref, msg: Ref) -> Result<()> {
+    let channel = target.fetch_channel().await?;
+
+    let perm = permissions::PermissionCalculator::new(&user)
+        .with_channel(&channel)
+        .for_channel()
+        .await?;
+    if !perm.get_view() {
+        Err(Error::MissingPermission)?
+    }
+
+    let message = msg.fetch_message(&channel).await?;
+    if message.author != user.id && !perm.get_manage_messages() {
+        match channel {
+            Channel::SavedMessages { .. } => unreachable!(),
+            _ => Err(Error::CannotEditMessage)?,
+        }
+    }
+
+    message.delete().await
+}

src/routes/channels/message_edit.rs

@@ -0,0 +1,74 @@
+use crate::database::*;
+use crate::util::result::{Error, Result};
+
+use chrono::Utc;
+use mongodb::bson::{doc, Bson, DateTime, Document};
+use rocket_contrib::json::Json;
+use serde::{Deserialize, Serialize};
+use validator::Validate;
+
+#[derive(Validate, Serialize, Deserialize)]
+pub struct Data {
+    #[validate(length(min = 1, max = 2000))]
+    content: String,
+}
+
+#[patch("/<target>/messages/<msg>", data = "<edit>")]
+pub async fn req(user: User, target: Ref, msg: Ref, edit: Json<Data>) -> Result<()> {
+    edit.validate()
+        .map_err(|error| Error::FailedValidation { error })?;
+
+    let channel = target.fetch_channel().await?;
+    let perm = permissions::PermissionCalculator::new(&user)
+        .with_channel(&channel)
+        .for_channel()
+        .await?;
+    if !perm.get_view() {
+        Err(Error::MissingPermission)?
+    }
+
+    let message = msg.fetch_message(&channel).await?;
+    if message.author != user.id {
+        Err(Error::CannotEditMessage)?
+    }
+
+    let edited = Utc::now();
+    let mut set = doc! {
+        "content": &edit.content,
+        "edited": Bson::DateTime(edited)
+    };
+
+    let mut update = json!({ "content": edit.content, "edited": DateTime(edited) });
+
+    if let Some(embeds) = &message.embeds {
+        let new_embeds: Vec<Document> = vec![];
+
+        for embed in embeds {
+            match embed {
+                Embed::Website(_) | Embed::Image(_) | Embed::None => {} // Otherwise push to new_embeds.
+            }
+        }
+
+        let obj = update.as_object_mut().unwrap();
+        obj.insert("embeds".to_string(), json!(new_embeds).0);
+        set.insert("embeds", new_embeds);
+    }
+
+    get_collection("messages")
+        .update_one(
+            doc! {
+                "_id": &message.id
+            },
+            doc! {
+                "$set": set
+            },
+            None,
+        )
+        .await
+        .map_err(|_| Error::DatabaseError {
+            operation: "update_one",
+            with: "message",
+        })?;
+
+    message.publish_update(update).await
+}

src/routes/channels/message_fetch.rs

@@ -0,0 +1,20 @@
+use crate::database::*;
+use crate::util::result::{Error, Result};
+
+use rocket_contrib::json::JsonValue;
+
+#[get("/<target>/messages/<msg>")]
+pub async fn req(user: User, target: Ref, msg: Ref) -> Result<JsonValue> {
+    let channel = target.fetch_channel().await?;
+
+    let perm = permissions::PermissionCalculator::new(&user)
+        .with_channel(&channel)
+        .for_channel()
+        .await?;
+    if !perm.get_view() {
+        Err(Error::MissingPermission)?
+    }
+
+    let message = msg.fetch_message(&channel).await?;
+    Ok(json!(message))
+}

src/routes/channels/message_query.rs

@@ -0,0 +1,118 @@
+use std::collections::HashSet;
+
+use crate::database::*;
+use crate::util::result::{Error, Result};
+
+use futures::StreamExt;
+use mongodb::{
+    bson::{doc, from_document},
+    options::FindOptions,
+};
+use rocket::request::Form;
+use rocket_contrib::json::JsonValue;
+use serde::{Deserialize, Serialize};
+use validator::Validate;
+
+#[derive(Serialize, Deserialize, FromFormValue)]
+pub enum Sort {
+    Latest,
+    Oldest,
+}
+
+#[derive(Validate, Serialize, Deserialize, FromForm)]
+pub struct Options {
+    #[validate(range(min = 1, max = 100))]
+    limit: Option<i64>,
+    #[validate(length(min = 26, max = 26))]
+    before: Option<String>,
+    #[validate(length(min = 26, max = 26))]
+    after: Option<String>,
+    sort: Option<Sort>,
+    include_users: Option<bool>,
+}
+
+#[get("/<target>/messages?<options..>")]
+pub async fn req(user: User, target: Ref, options: Form<Options>) -> Result<JsonValue> {
+    options
+        .validate()
+        .map_err(|error| Error::FailedValidation { error })?;
+
+    let target = target.fetch_channel().await?;
+
+    let perm = permissions::PermissionCalculator::new(&user)
+        .with_channel(&target)
+        .for_channel()
+        .await?;
+    if !perm.get_view() {
+        Err(Error::MissingPermission)?
+    }
+
+    let mut query = doc! { "channel": target.id() };
+
+    if let Some(before) = &options.before {
+        query.insert("_id", doc! { "$lt": before });
+    }
+
+    if let Some(after) = &options.after {
+        query.insert("_id", doc! { "$gt": after });
+    }
+
+    let sort = if let Sort::Latest = options.sort.as_ref().unwrap_or_else(|| &Sort::Latest) {
+        -1
+    } else {
+        1
+    };
+    let mut cursor = get_collection("messages")
+        .find(
+            query,
+            FindOptions::builder()
+                .limit(options.limit.unwrap_or(50))
+                .sort(doc! {
+                    "_id": sort
+                })
+                .build(),
+        )
+        .await
+        .map_err(|_| Error::DatabaseError {
+            operation: "find",
+            with: "messages",
+        })?;
+
+    let mut messages = vec![];
+    while let Some(result) = cursor.next().await {
+        if let Ok(doc) = result {
+            messages.push(
+                from_document::<Message>(doc).map_err(|_| Error::DatabaseError {
+                    operation: "from_document",
+                    with: "message",
+                })?,
+            );
+        }
+    }
+
+    if options.include_users.unwrap_or_else(|| false) {
+        let mut ids = HashSet::new();
+        for message in &messages {
+            ids.insert(message.author.clone());
+        }
+
+        ids.remove(&user.id);
+        let user_ids = ids.into_iter().collect();
+        let users = user.fetch_multiple_users(user_ids).await?;
+
+        if let Channel::TextChannel { server, .. } = target {
+            Ok(json!({
+                "messages": messages,
+                "users": users,
+                "members": Server::fetch_members(&server).await?
+            }))
+        } else {
+            Ok(json!({
+                "messages": messages,
+                "users": users,
+            }))
+        }
+    } else {
+        Ok(json!(messages))
+    }
+}

src/routes/channels/message_query_stale.rs

@@ -0,0 +1,73 @@
+use crate::database::*;
+use crate::util::result::{Error, Result};
+
+use futures::StreamExt;
+use mongodb::bson::{doc, from_document};
+use rocket_contrib::json::{Json, JsonValue};
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize)]
+pub struct Options {
+    ids: Vec<String>,
+}
+
+#[post("/<target>/messages/stale", data = "<data>")]
+pub async fn req(user: User, target: Ref, data: Json<Options>) -> Result<JsonValue> {
+    if data.ids.len() > 150 {
+        return Err(Error::TooManyIds);
+    }
+
+    let target = target.fetch_channel().await?;
+
+    let perm = permissions::PermissionCalculator::new(&user)
+        .with_channel(&target)
+        .for_channel()
+        .await?;
+    if !perm.get_view() {
+        Err(Error::MissingPermission)?
+    }
+
+    let mut cursor = get_collection("messages")
+        .find(
+            doc! {
+                "_id": {
+                    "$in": &data.ids
+                },
+                "channel": target.id()
+            },
+            None,
+        )
+        .await
+        .map_err(|_| Error::DatabaseError {
+            operation: "find",
+            with: "messages",
+        })?;
+
+    let mut updated = vec![];
+    let mut found_ids = vec![];
+    while let Some(result) = cursor.next().await {
+        if let Ok(doc) = result {
+            let msg = from_document::<Message>(doc).map_err(|_| Error::DatabaseError {
+                operation: "from_document",
+                with: "message",
+            })?;
+
+            found_ids.push(msg.id.clone());
+            if msg.edited.is_some() {
+                updated.push(msg);
+            }
+        }
+    }
+
+    let mut deleted = vec![];
+    for id in &data.ids {
+        if found_ids.iter().find(|x| *x == id).is_none() {
+            deleted.push(id);
+        }
+    }
+
+    Ok(json!({
+        "updated": updated,
+        "deleted": deleted
+    }))
+}

src/routes/channels/message_send.rs

@@ -0,0 +1,112 @@
+use crate::database::*;
+use crate::util::result::{Error, Result};
+
+use mongodb::{bson::doc, options::FindOneOptions};
+use regex::Regex;
+use rocket_contrib::json::{Json, JsonValue};
+use serde::{Deserialize, Serialize};
+use ulid::Ulid;
+use validator::Validate;
+
+#[derive(Validate, Serialize, Deserialize)]
+pub struct Data {
+    #[validate(length(min = 0, max = 2000))]
+    content: String,
+    // Maximum length of 36 allows both ULIDs and UUIDs.
+    #[validate(length(min = 1, max = 36))]
+    nonce: String,
+    #[validate(length(min = 1, max = 128))]
+    attachments: Option<Vec<String>>,
+}
+
+lazy_static! {
+    static ref RE_ULID: Regex = Regex::new(r"<@([0123456789ABCDEFGHJKMNPQRSTVWXYZ]{26})>").unwrap();
+}
+
+#[post("/<target>/messages", data = "<message>")]
+pub async fn req(user: User, target: Ref, message: Json<Data>) -> Result<JsonValue> {
+    message
+        .validate()
+        .map_err(|error| Error::FailedValidation { error })?;
+
+    if message.content.len() == 0
+        && (message.attachments.is_none() || message.attachments.as_ref().unwrap().len() == 0)
+    {
+        return Err(Error::EmptyMessage);
+    }
+
+    let target = target.fetch_channel().await?;
+    let perm = permissions::PermissionCalculator::new(&user)
+        .with_channel(&target)
+        .for_channel()
+        .await?;
+
+    if !perm.get_send_message() {
+        Err(Error::MissingPermission)?
+    }
+
+    if get_collection("messages")
+        .find_one(
+            doc! {
+                "nonce": &message.nonce
+            },
+            FindOneOptions::builder()
+                .projection(doc! { "_id": 1 })
+                .build(),
+        )
+        .await
+        .map_err(|_| Error::DatabaseError {
+            operation: "find_one",
+            with: "message",
+        })?
+        .is_some()
+    {
+        Err(Error::DuplicateNonce)?
+    }
+
+    let id = Ulid::new().to_string();
+    let attachments = if let Some(ids) = &message.attachments {
+        // ! FIXME: move this to app config
+        if ids.len() >= 5 {
+            return Err(Error::TooManyAttachments)
+        }
+
+        let mut attachments = vec![];
+        for attachment_id in ids {
+            attachments
+                .push(File::find_and_use(attachment_id, "attachments", "message", &id).await?);
+        }
+
+        Some(attachments)
+    } else {
+        None
+    };
+
+    let mut mentions = vec![];
+    if let Some(captures) = RE_ULID.captures_iter(&message.content).next() {
+        // ! FIXME: in the future, verify in group so we can send out push
+        mentions.push(captures[1].to_string());
+    }
+
+
+    let msg = Message {
+        id,
+        channel: target.id().to_string(),
+        author: user.id,
+
+        content: Content::Text(message.content.clone()),
+        attachments,
+        nonce: Some(message.nonce.clone()),
+        edited: None,
+        embeds: None,
+        mentions: if mentions.len() > 0 {
+            Some(mentions)
+        } else {
+            None
+        },
+    };
+
+    msg.clone().publish(&target).await?;
+
+    Ok(json!(msg))
+}

src/routes/channels/mod.rs

@@ -0,0 +1,39 @@
+use rocket::Route;
+
+mod channel_ack;
+mod delete_channel;
+mod edit_channel;
+mod fetch_channel;
+mod fetch_members;
+mod group_add_member;
+mod group_create;
+mod group_remove_member;
+mod invite_create;
+mod join_call;
+mod message_delete;
+mod message_edit;
+mod message_fetch;
+mod message_query;
+mod message_query_stale;
+mod message_send;
+
+pub fn routes() -> Vec<Route> {
+    routes![
+        channel_ack::req,
+        fetch_channel::req,
+        fetch_members::req,
+        delete_channel::req,
+        edit_channel::req,
+        invite_create::req,
+        message_send::req,
+        message_query::req,
+        message_query_stale::req,
+        message_fetch::req,
+        message_edit::req,
+        message_delete::req,
+        group_create::req,
+        group_add_member::req,
+        group_remove_member::req,
+        join_call::req,
+    ]
+}

src/routes/guild.rs

@@ -1,840 +0,0 @@
-use super::channel::ChannelType;
-use super::Response;
-use crate::database::{self, channel::Channel, Permission, PermissionCalculator};
-use crate::guards::auth::UserRef;
-use crate::guards::channel::ChannelRef;
-use crate::guards::guild::{get_invite, get_member, GuildRef};
-use crate::notifications::{
-    self,
-    events::{guilds::*, Notification},
-};
-use crate::util::gen_token;
-
-use bson::{doc, from_bson, Bson};
-use mongodb::options::{FindOneOptions, FindOptions};
-use rocket::request::Form;
-use rocket_contrib::json::Json;
-use serde::{Deserialize, Serialize};
-use ulid::Ulid;
-
-macro_rules! with_permissions {
-    ($user: expr, $target: expr) => {{
-        let permissions = PermissionCalculator::new($user.clone())
-            .guild($target.clone())
-            .fetch_data();
-
-        let value = permissions.as_permission();
-        if !value.get_access() {
-            return None;
-        }
-
-        (value, permissions.member.unwrap())
-    }};
-}
-
-/// fetch your guilds
-#[get("/@me")]
-pub fn my_guilds(user: UserRef) -> Response {
-    if let Ok(result) = database::get_collection("members").find(
-        doc! {
-            "_id.user": &user.id
-        },
-        None,
-    ) {
-        let mut guilds = vec![];
-        for item in result {
-            if let Ok(entry) = item {
-                guilds.push(Bson::String(
-                    entry
-                        .get_document("_id")
-                        .unwrap()
-                        .get_str("guild")
-                        .unwrap()
-                        .to_string(),
-                ));
-            }
-        }
-
-        if let Ok(result) = database::get_collection("guilds").find(
-            doc! {
-                "_id": {
-                    "$in": guilds
-                }
-            },
-            FindOptions::builder()
-                .projection(doc! {
-                    "_id": 1,
-                    "name": 1,
-                    "description": 1,
-                    "owner": 1,
-                })
-                .build(),
-        ) {
-            let mut parsed = vec![];
-            for item in result {
-                let doc = item.unwrap();
-                parsed.push(json!({
-                    "id": doc.get_str("_id").unwrap(),
-                    "name": doc.get_str("name").unwrap(),
-                    "description": doc.get_str("description").unwrap(),
-                    "owner": doc.get_str("owner").unwrap(),
-                }));
-            }
-
-            Response::Success(json!(parsed))
-        } else {
-            Response::InternalServerError(json!({ "error": "Failed to fetch guilds." }))
-        }
-    } else {
-        Response::InternalServerError(json!({ "error": "Failed to fetch memberships." }))
-    }
-}
-
-/// fetch a guild
-#[get("/<target>")]
-pub fn guild(user: UserRef, target: GuildRef) -> Option<Response> {
-    with_permissions!(user, target);
-
-    let col = database::get_collection("channels");
-    match col.find(
-        doc! {
-            "type": 2,
-            "guild": &target.id,
-        },
-        None,
-    ) {
-        Ok(results) => {
-            let mut channels = vec![];
-            for item in results {
-                if let Ok(entry) = item {
-                    if let Ok(channel) =
-                        from_bson(bson::Bson::Document(entry)) as Result<Channel, _>
-                    {
-                        channels.push(json!({
-                            "id": channel.id,
-                            "name": channel.name,
-                            "description": channel.description,
-                        }));
-                    }
-                }
-            }
-
-            Some(Response::Success(json!({
-                "id": target.id,
-                "name": target.name,
-                "description": target.description,
-                "owner": target.owner,
-                "channels": channels,
-            })))
-        }
-        Err(_) => Some(Response::InternalServerError(
-            json!({ "error": "Failed to fetch channels." }),
-        )),
-    }
-}
-
-/// delete or leave a guild
-#[delete("/<target>")]
-pub fn remove_guild(user: UserRef, target: GuildRef) -> Option<Response> {
-    with_permissions!(user, target);
-
-    if user.id == target.owner {
-        let channels = database::get_collection("channels");
-        if let Ok(result) = channels.find(
-            doc! {
-                "type": 2,
-                "guild": &target.id
-            },
-            FindOptions::builder().projection(doc! { "_id": 1 }).build(),
-        ) {
-            let mut values = vec![];
-            for item in result {
-                if let Ok(doc) = item {
-                    values.push(Bson::String(doc.get_str("_id").unwrap().to_string()));
-                }
-            }
-
-            if database::get_collection("messages")
-                .delete_many(
-                    doc! {
-                        "channel": {
-                            "$in": values
-                        }
-                    },
-                    None,
-                )
-                .is_ok()
-            {
-                if channels
-                    .delete_many(
-                        doc! {
-                            "type": 2,
-                            "guild": &target.id,
-                        },
-                        None,
-                    )
-                    .is_ok()
-                {
-                    if database::get_collection("guilds")
-                        .delete_one(
-                            doc! {
-                                "_id": &target.id
-                            },
-                            None,
-                        )
-                        .is_ok()
-                    {
-                        notifications::send_message_threaded(
-                            None,
-                            target.id.clone(),
-                            Notification::guild_delete(Delete {
-                                id: target.id.clone(),
-                            }),
-                        );
-
-                        Some(Response::Result(super::Status::Ok))
-                    } else {
-                        Some(Response::InternalServerError(
-                            json!({ "error": "Failed to delete guild." }),
-                        ))
-                    }
-                } else {
-                    Some(Response::InternalServerError(
-                        json!({ "error": "Failed to delete guild channels." }),
-                    ))
-                }
-            } else {
-                Some(Response::InternalServerError(
-                    json!({ "error": "Failed to delete guild messages." }),
-                ))
-            }
-        } else {
-            Some(Response::InternalServerError(
-                json!({ "error": "Could not fetch channels." }),
-            ))
-        }
-    } else {
-        if database::get_collection("members")
-            .delete_one(
-                doc! {
-                    "_id.guild": &target.id,
-                    "_id.user": &user.id,
-                },
-                None,
-            )
-            .is_ok()
-        {
-            notifications::send_message_threaded(
-                None,
-                target.id.clone(),
-                Notification::guild_user_leave(UserLeave {
-                    id: target.id.clone(),
-                    user: user.id.clone(),
-                    banned: false,
-                }),
-            );
-
-            Some(Response::Result(super::Status::Ok))
-        } else {
-            Some(Response::InternalServerError(
-                json!({ "error": "Failed to remove you from the guild." }),
-            ))
-        }
-    }
-}
-
-#[derive(Serialize, Deserialize)]
-pub struct CreateChannel {
-    nonce: String,
-    name: String,
-    description: Option<String>,
-}
-
-/// create a new channel
-#[post("/<target>/channels", data = "<info>")]
-pub fn create_channel(
-    user: UserRef,
-    target: GuildRef,
-    info: Json<CreateChannel>,
-) -> Option<Response> {
-    let (permissions, _) = with_permissions!(user, target);
-
-    if !permissions.get_manage_channels() {
-        return Some(Response::LackingPermission(Permission::ManageChannels));
-    }
-
-    let nonce: String = info.nonce.chars().take(32).collect();
-    let name: String = info.name.chars().take(32).collect();
-    let description: String = info
-        .description
-        .clone()
-        .unwrap_or(String::new())
-        .chars()
-        .take(255)
-        .collect();
-
-    if let Ok(result) =
-        database::get_collection("channels").find_one(doc! { "nonce": &nonce }, None)
-    {
-        if result.is_some() {
-            return Some(Response::BadRequest(
-                json!({ "error": "Channel already created." }),
-            ));
-        }
-
-        let id = Ulid::new().to_string();
-        if database::get_collection("channels")
-            .insert_one(
-                doc! {
-                    "_id": &id,
-                    "nonce": &nonce,
-                    "type": 2,
-                    "guild": &target.id,
-                    "name": &name,
-                    "description": &description,
-                },
-                None,
-            )
-            .is_ok()
-        {
-            notifications::send_message_threaded(
-                None,
-                target.id.clone(),
-                Notification::guild_channel_create(ChannelCreate {
-                    id: target.id.clone(),
-                    channel: id.clone(),
-                    name: name.clone(),
-                    description: description.clone(),
-                }),
-            );
-
-            Some(Response::Success(json!({ "id": &id })))
-        } else {
-            Some(Response::BadRequest(
-                json!({ "error": "Couldn't create channel." }),
-            ))
-        }
-    } else {
-        Some(Response::BadRequest(
-            json!({ "error": "Failed to check if channel was made." }),
-        ))
-    }
-}
-
-#[derive(Serialize, Deserialize)]
-pub struct InviteOptions {
-    // ? TODO: add options
-}
-
-/// create a new invite
-#[post("/<target>/channels/<channel>/invite", data = "<_options>")]
-pub fn create_invite(
-    user: UserRef,
-    target: GuildRef,
-    channel: ChannelRef,
-    _options: Json<InviteOptions>,
-) -> Option<Response> {
-    let (permissions, _) = with_permissions!(user, target);
-
-    if !permissions.get_create_invite() {
-        return Some(Response::LackingPermission(Permission::CreateInvite));
-    }
-
-    let code = gen_token(7);
-    if database::get_collection("guilds")
-        .update_one(
-            doc! { "_id": target.id },
-            doc! {
-                "$push": {
-                    "invites": {
-                        "code": &code,
-                        "creator": user.id,
-                        "channel": channel.id,
-                    }
-                }
-            },
-            None,
-        )
-        .is_ok()
-    {
-        Some(Response::Success(json!({ "code": code })))
-    } else {
-        Some(Response::BadRequest(
-            json!({ "error": "Failed to create invite." }),
-        ))
-    }
-}
-
-/// remove an invite
-#[delete("/<target>/invites/<code>")]
-pub fn remove_invite(user: UserRef, target: GuildRef, code: String) -> Option<Response> {
-    let (permissions, _) = with_permissions!(user, target);
-
-    if let Some((guild_id, _, invite)) = get_invite(&code, None) {
-        if invite.creator != user.id {
-            if !permissions.get_manage_server() {
-                return Some(Response::LackingPermission(Permission::ManageServer));
-            }
-        }
-
-        if database::get_collection("guilds")
-            .update_one(
-                doc! {
-                    "_id": &guild_id,
-                },
-                doc! {
-                    "$pull": {
-                        "invites": {
-                            "code": &code
-                        }
-                    }
-                },
-                None,
-            )
-            .is_ok()
-        {
-            Some(Response::Result(super::Status::Ok))
-        } else {
-            Some(Response::BadRequest(
-                json!({ "error": "Failed to delete invite." }),
-            ))
-        }
-    } else {
-        Some(Response::NotFound(
-            json!({ "error": "Failed to fetch invite or code is invalid." }),
-        ))
-    }
-}
-
-/// fetch all guild invites
-#[get("/<target>/invites")]
-pub fn fetch_invites(user: UserRef, target: GuildRef) -> Option<Response> {
-    let (permissions, _) = with_permissions!(user, target);
-
-    if !permissions.get_manage_server() {
-        return Some(Response::LackingPermission(Permission::ManageServer));
-    }
-
-    if let Some(doc) = target.fetch_data(doc! {
-        "invites": 1,
-    }) {
-        Some(Response::Success(json!(doc.get_array("invites").unwrap())))
-    } else {
-        Some(Response::InternalServerError(
-            json!({ "error": "Failed to fetch invites." }),
-        ))
-    }
-}
-
-/// view an invite before joining
-#[get("/join/<code>", rank = 1)]
-pub fn fetch_invite(user: UserRef, code: String) -> Response {
-    if let Some((guild_id, name, invite)) = get_invite(&code, user.id) {
-        if let Some(channel) = ChannelRef::from(invite.channel) {
-            Response::Success(json!({
-                "guild": {
-                    "id": guild_id,
-                    "name": name,
-                },
-                "channel": {
-                    "id": channel.id,
-                    "name": channel.name,
-                }
-            }))
-        } else {
-            Response::BadRequest(json!({ "error": "Failed to fetch channel." }))
-        }
-    } else {
-        Response::NotFound(json!({ "error": "Failed to fetch invite or code is invalid." }))
-    }
-}
-
-/// join a guild using an invite
-#[post("/join/<code>", rank = 1)]
-pub fn use_invite(user: UserRef, code: String) -> Response {
-    if let Some((guild_id, _, invite)) = get_invite(&code, Some(user.id.clone())) {
-        if let Ok(result) = database::get_collection("members").find_one(
-            doc! {
-                "_id.guild": &guild_id,
-                "_id.user": &user.id
-            },
-            FindOneOptions::builder()
-                .projection(doc! { "_id": 1 })
-                .build(),
-        ) {
-            if result.is_none() {
-                if database::get_collection("members")
-                    .insert_one(
-                        doc! {
-                            "_id": {
-                                "guild": &guild_id,
-                                "user": &user.id
-                            }
-                        },
-                        None,
-                    )
-                    .is_ok()
-                {
-                    notifications::send_message_threaded(
-                        None,
-                        guild_id.clone(),
-                        Notification::guild_user_join(UserJoin {
-                            id: guild_id.clone(),
-                            user: user.id.clone(),
-                        }),
-                    );
-
-                    Response::Success(json!({
-                        "guild": &guild_id,
-                        "channel": &invite.channel,
-                    }))
-                } else {
-                    Response::InternalServerError(
-                        json!({ "error": "Failed to add you to the guild." }),
-                    )
-                }
-            } else {
-                Response::BadRequest(json!({ "error": "Already in the guild." }))
-            }
-        } else {
-            Response::InternalServerError(
-                json!({ "error": "Failed to check if you're in the guild." }),
-            )
-        }
-    } else {
-        Response::NotFound(json!({ "error": "Failed to fetch invite or code is invalid." }))
-    }
-}
-
-#[derive(Serialize, Deserialize)]
-pub struct CreateGuild {
-    name: String,
-    description: Option<String>,
-    nonce: String,
-}
-
-/// create a new guild
-#[post("/create", data = "<info>")]
-pub fn create_guild(user: UserRef, info: Json<CreateGuild>) -> Response {
-    if !user.email_verified {
-        return Response::Unauthorized(json!({ "error": "Email not verified!" }));
-    }
-
-    let name: String = info.name.chars().take(32).collect();
-    let description: String = info
-        .description
-        .clone()
-        .unwrap_or("No description.".to_string())
-        .chars()
-        .take(255)
-        .collect();
-    let nonce: String = info.nonce.chars().take(32).collect();
-
-    let channels = database::get_collection("channels");
-    let col = database::get_collection("guilds");
-    if col
-        .find_one(doc! { "nonce": nonce.clone() }, None)
-        .unwrap()
-        .is_some()
-    {
-        return Response::BadRequest(json!({ "error": "Guild already created!" }));
-    }
-
-    let id = Ulid::new().to_string();
-    let channel_id = Ulid::new().to_string();
-    if channels
-        .insert_one(
-            doc! {
-                "_id": channel_id.clone(),
-                "type": ChannelType::GUILDCHANNEL as u32,
-                "name": "general",
-                "description": "",
-                "guild": id.clone(),
-            },
-            None,
-        )
-        .is_err()
-    {
-        return Response::InternalServerError(
-            json!({ "error": "Failed to create guild channel." }),
-        );
-    }
-
-    if database::get_collection("members")
-        .insert_one(
-            doc! {
-                "_id": {
-                    "guild": &id,
-                    "user": &user.id
-                }
-            },
-            None,
-        )
-        .is_err()
-    {
-        return Response::InternalServerError(
-            json!({ "error": "Failed to add you to members list." }),
-        );
-    }
-
-    if col
-        .insert_one(
-            doc! {
-                "_id": &id,
-                "nonce": nonce,
-                "name": name,
-                "description": description,
-                "owner": &user.id,
-                "invites": [],
-                "bans": [],
-                "default_permissions": 51,
-            },
-            None,
-        )
-        .is_ok()
-    {
-        Response::Success(json!({ "id": id }))
-    } else {
-        channels
-            .delete_one(doc! { "_id": channel_id }, None)
-            .expect("Failed to delete the channel we just made.");
-
-        Response::InternalServerError(json!({ "error": "Failed to create guild." }))
-    }
-}
-
-/// fetch a guild's member
-#[get("/<target>/members")]
-pub fn fetch_members(user: UserRef, target: GuildRef) -> Option<Response> {
-    with_permissions!(user, target);
-
-    if let Ok(result) =
-        database::get_collection("members").find(doc! { "_id.guild": target.id }, None)
-    {
-        let mut users = vec![];
-
-        for item in result {
-            if let Ok(doc) = item {
-                users.push(json!({
-                    "id": doc.get_document("_id").unwrap().get_str("user").unwrap(),
-                    "nickname": doc.get_str("nickname").ok(),
-                }));
-            }
-        }
-
-        Some(Response::Success(json!(users)))
-    } else {
-        Some(Response::InternalServerError(
-            json!({ "error": "Failed to fetch members." }),
-        ))
-    }
-}
-
-/// fetch a guild member
-#[get("/<target>/members/<other>")]
-pub fn fetch_member(user: UserRef, target: GuildRef, other: String) -> Option<Response> {
-    with_permissions!(user, target);
-
-    if let Some(member) = get_member(&target.id, &other) {
-        Some(Response::Success(json!({
-            "id": member.id.user,
-            "nickname": member.nickname,
-        })))
-    } else {
-        Some(Response::InternalServerError(
-            json!({ "error": "Failed to fetch member or user does not exist." }),
-        ))
-    }
-}
-
-/// kick a guild member
-#[delete("/<target>/members/<other>")]
-pub fn kick_member(user: UserRef, target: GuildRef, other: String) -> Option<Response> {
-    let (permissions, _) = with_permissions!(user, target);
-
-    if user.id == other {
-        return Some(Response::BadRequest(
-            json!({ "error": "Cannot kick yourself." }),
-        ));
-    }
-
-    if !permissions.get_kick_members() {
-        return Some(Response::LackingPermission(Permission::KickMembers));
-    }
-
-    if get_member(&target.id, &other).is_none() {
-        return Some(Response::BadRequest(
-            json!({ "error": "User not part of guild." }),
-        ));
-    }
-
-    if database::get_collection("members")
-        .delete_one(
-            doc! {
-                "_id.guild": &target.id,
-                "_id.user": &other,
-            },
-            None,
-        )
-        .is_ok()
-    {
-        notifications::send_message_threaded(
-            None,
-            target.id.clone(),
-            Notification::guild_user_leave(UserLeave {
-                id: target.id.clone(),
-                user: other.clone(),
-                banned: false,
-            }),
-        );
-
-        Some(Response::Result(super::Status::Ok))
-    } else {
-        Some(Response::InternalServerError(
-            json!({ "error": "Failed to kick member." }),
-        ))
-    }
-}
-
-#[derive(Serialize, Deserialize, FromForm)]
-pub struct BanOptions {
-    reason: Option<String>,
-}
-
-/// ban a guild member
-#[put("/<target>/members/<other>/ban?<options..>")]
-pub fn ban_member(
-    user: UserRef,
-    target: GuildRef,
-    other: String,
-    options: Form<BanOptions>,
-) -> Option<Response> {
-    let (permissions, _) = with_permissions!(user, target);
-    let reason: String = options
-        .reason
-        .clone()
-        .unwrap_or("No reason specified.".to_string())
-        .chars()
-        .take(64)
-        .collect();
-
-    if user.id == other {
-        return Some(Response::BadRequest(
-            json!({ "error": "Cannot ban yourself." }),
-        ));
-    }
-
-    if !permissions.get_ban_members() {
-        return Some(Response::LackingPermission(Permission::BanMembers));
-    }
-
-    if get_member(&target.id, &other).is_none() {
-        return Some(Response::BadRequest(
-            json!({ "error": "User not part of guild." }),
-        ));
-    }
-
-    if database::get_collection("guilds")
-        .update_one(
-            doc! { "_id": &target.id },
-            doc! {
-                "$push": {
-                    "bans": {
-                        "id": &other,
-                        "reason": reason,
-                    }
-                }
-            },
-            None,
-        )
-        .is_err()
-    {
-        return Some(Response::BadRequest(
-            json!({ "error": "Failed to add ban to guild." }),
-        ));
-    }
-
-    if database::get_collection("members")
-        .delete_one(
-            doc! {
-                "_id.guild": &target.id,
-                "_id.user": &other,
-            },
-            None,
-        )
-        .is_ok()
-    {
-        notifications::send_message_threaded(
-            None,
-            target.id.clone(),
-            Notification::guild_user_leave(UserLeave {
-                id: target.id.clone(),
-                user: other.clone(),
-                banned: true,
-            }),
-        );
-
-        Some(Response::Result(super::Status::Ok))
-    } else {
-        Some(Response::InternalServerError(
-            json!({ "error": "Failed to kick member after adding to ban list." }),
-        ))
-    }
-}
-
-/// unban a guild member
-#[delete("/<target>/members/<other>/ban")]
-pub fn unban_member(user: UserRef, target: GuildRef, other: String) -> Option<Response> {
-    let (permissions, _) = with_permissions!(user, target);
-
-    if user.id == other {
-        return Some(Response::BadRequest(
-            json!({ "error": "Cannot unban yourself (not checking if you're banned)." }),
-        ));
-    }
-
-    if !permissions.get_ban_members() {
-        return Some(Response::LackingPermission(Permission::BanMembers));
-    }
-
-    if target
-        .fetch_data_given(
-            doc! {
-                "bans": {
-                    "$elemMatch": {
-                        "id": &other
-                    }
-                }
-            },
-            doc! {},
-        )
-        .is_none()
-    {
-        return Some(Response::BadRequest(json!({ "error": "User not banned." })));
-    }
-
-    if database::get_collection("guilds")
-        .update_one(
-            doc! {
-                "_id": &target.id
-            },
-            doc! {
-                "$pull": {
-                    "bans": {
-                        "$elemMatch": {
-                            "id": &other
-                        }
-                    }
-                }
-            },
-            None,
-        )
-        .is_ok()
-    {
-        Some(Response::Result(super::Status::Ok))
-    } else {
-        Some(Response::BadRequest(
-            json!({ "error": "Failed to remove ban." }),
-        ))
-    }
-}

src/routes/invites/invite_delete.rs

@@ -0,0 +1,28 @@
+use crate::database::*;
+use crate::util::result::{Error, Result};
+
+#[delete("/<target>")]
+pub async fn req(user: User, target: Ref) -> Result<()> {
+    let target = target.fetch_invite().await?;
+
+    if target.creator() == &user.id {
+        target.delete().await
+    } else {
+        match &target {
+            Invite::Server { server, .. } => {
+                let server = Ref::from_unchecked(server.clone()).fetch_server().await?;
+                let perm = permissions::PermissionCalculator::new(&user)
+                    .with_server(&server)
+                    .for_server()
+                    .await?;
+
+                if !perm.get_manage_server() {
+                    return Err(Error::MissingPermission);
+                }
+
+                target.delete().await
+            }
+            _ => unreachable!(),
+        }
+    }
+}

src/routes/invites/invite_fetch.rs

@@ -0,0 +1,65 @@
+use crate::database::*;
+use crate::util::result::Result;
+
+use rocket_contrib::json::JsonValue;
+use serde::Serialize;
+
+#[derive(Serialize, Debug, Clone)]
+#[serde(tag = "type")]
+pub enum InviteResponse {
+    Server {
+        server_id: String,
+        server_name: String,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        server_icon: Option<File>,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        server_banner: Option<File>,
+        channel_id: String,
+        channel_name: String,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        channel_description: Option<String>,
+        user_name: String,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        user_avatar: Option<File>,
+    },
+}
+
+#[get("/<target>")]
+pub async fn req(target: Ref) -> Result<JsonValue> {
+    let target = target.fetch_invite().await?;
+
+    match target {
+        Invite::Server {
+            channel, creator, ..
+        } => {
+            let channel = Ref::from_unchecked(channel).fetch_channel().await?;
+            let creator = Ref::from_unchecked(creator).fetch_user().await?;
+
+            if let Channel::TextChannel {
+                id,
+                server,
+                name,
+                description,
+                ..
+            } = channel
+            {
+                let server = Ref::from_unchecked(server).fetch_server().await?;
+
+                Ok(json!(InviteResponse::Server {
+                    server_id: server.id,
+                    server_name: server.name,
+                    server_icon: server.icon,
+                    server_banner: server.banner,
+                    channel_id: id,
+                    channel_name: name,
+                    channel_description: description,
+                    user_name: creator.username,
+                    user_avatar: creator.avatar
+                }))
+            } else {
+                unreachable!()
+            }
+        }
+        _ => unreachable!(),
+    }
+}

src/routes/invites/invite_join.rs

@@ -0,0 +1,29 @@
+use crate::database::*;
+use crate::util::result::Result;
+
+use rocket_contrib::json::JsonValue;
+
+#[post("/<target>")]
+pub async fn req(user: User, target: Ref) -> Result<JsonValue> {
+    let target = target.fetch_invite().await?;
+
+    match target {
+        Invite::Server { channel, .. } => {
+            let channel = Ref::from_unchecked(channel).fetch_channel().await?;
+            let server = if let Channel::TextChannel { server, .. } = &channel {
+                Ref::from_unchecked(server.clone()).fetch_server().await?
+            } else {
+                unreachable!()
+            };
+
+            server.join_member(&user.id).await?;
+
+            Ok(json!({
+                "type": "Server",
+                "channel": channel,
+                "server": server
+            }))
+        }
+        _ => unreachable!(),
+    }
+}

src/routes/invites/mod.rs

@@ -0,0 +1,9 @@
+use rocket::Route;
+
+mod invite_delete;
+mod invite_fetch;
+mod invite_join;
+
+pub fn routes() -> Vec<Route> {
+    routes![invite_fetch::req, invite_join::req, invite_delete::req]
+}

src/routes/mod.rs

@@ -1,126 +1,24 @@
 pub use rocket::http::Status;
 pub use rocket::response::Redirect;
 use rocket::Rocket;
-use rocket_contrib::json::JsonValue;
 
-use crate::database::Permission;
-
-pub mod account;
-pub mod channel;
-pub mod guild;
-pub mod root;
-pub mod user;
-
-#[derive(Responder)]
-pub enum Response {
-    #[response()]
-    Result(Status),
-    #[response()]
-    Success(JsonValue),
-    #[response()]
-    Redirect(Redirect),
-    #[response(status = 207)]
-    PartialStatus(JsonValue),
-    #[response(status = 400)]
-    BadRequest(JsonValue),
-    #[response(status = 401)]
-    Unauthorized(JsonValue),
-    #[response(status = 401)]
-    LackingPermission(Permission),
-    #[response(status = 404)]
-    NotFound(JsonValue),
-    #[response(status = 406)]
-    NotAcceptable(JsonValue),
-    #[response(status = 409)]
-    Conflict(JsonValue),
-    #[response(status = 410)]
-    Gone(JsonValue),
-    #[response(status = 422)]
-    UnprocessableEntity(JsonValue),
-    #[response(status = 429)]
-    TooManyRequests(JsonValue),
-    #[response(status = 500)]
-    InternalServerError(JsonValue),
-}
-
-use rocket::http::ContentType;
-use rocket::request::Request;
-use std::io::Cursor;
-
-impl<'a> rocket::response::Responder<'a> for Permission {
-    fn respond_to(self, _: &Request) -> rocket::response::Result<'a> {
-        rocket::response::Response::build()
-            .header(ContentType::JSON)
-            .sized_body(Cursor::new(format!(
-                "{{\"error\":\"Lacking permission: {:?}.\",\"permission\":{}}}",
-                self, self as u32,
-            )))
-            .ok()
-    }
-}
+mod channels;
+mod invites;
+mod onboard;
+mod push;
+mod root;
+mod servers;
+mod sync;
+mod users;
 
 pub fn mount(rocket: Rocket) -> Rocket {
     rocket
-        .mount("/api", routes![root::root])
-        .mount(
-            "/api/account",
-            routes![
-                account::create,
-                account::verify_email,
-                account::resend_email,
-                account::login,
-                account::token
-            ],
-        )
-        .mount(
-            "/api/users",
-            routes![
-                user::me,
-                user::user,
-                user::lookup,
-                user::dms,
-                user::dm,
-                user::get_friends,
-                user::get_friend,
-                user::add_friend,
-                user::remove_friend,
-                user::block_user,
-                user::unblock_user
-            ],
-        )
-        .mount(
-            "/api/channels",
-            routes![
-                channel::create_group,
-                channel::channel,
-                channel::add_member,
-                channel::remove_member,
-                channel::delete,
-                channel::messages,
-                channel::get_message,
-                channel::send_message,
-                channel::edit_message,
-                channel::delete_message
-            ],
-        )
-        .mount(
-            "/api/guild",
-            routes![
-                guild::my_guilds,
-                guild::guild,
-                guild::remove_guild,
-                guild::create_channel,
-                guild::create_invite,
-                guild::remove_invite,
-                guild::fetch_invites,
-                guild::fetch_invite,
-                guild::use_invite,
-                guild::create_guild,
-                guild::fetch_members,
-                guild::fetch_member,
-                guild::kick_member,
-                guild::ban_member,
-                guild::unban_member
-            ],
-        )
+        .mount("/", routes![root::root])
+        .mount("/onboard", onboard::routes())
+        .mount("/users", users::routes())
+        .mount("/channels", channels::routes())
+        .mount("/servers", servers::routes())
+        .mount("/invites", invites::routes())
+        .mount("/push", push::routes())
+        .mount("/sync", sync::routes())
 }

src/routes/onboard/complete.rs

@@ -0,0 +1,49 @@
+use crate::database::*;
+use crate::util::result::{Error, Result};
+
+use mongodb::bson::doc;
+use rauth::auth::Session;
+use regex::Regex;
+use rocket_contrib::json::Json;
+use serde::{Deserialize, Serialize};
+use validator::Validate;
+
+lazy_static! {
+    static ref RE_USERNAME: Regex = Regex::new(r"^[a-zA-Z0-9_.]+$").unwrap();
+}
+
+#[derive(Validate, Serialize, Deserialize)]
+pub struct Data {
+    #[validate(length(min = 2, max = 32), regex = "RE_USERNAME")]
+    username: String,
+}
+
+#[post("/complete", data = "<data>")]
+pub async fn req(session: Session, user: Option<User>, data: Json<Data>) -> Result<()> {
+    if user.is_some() {
+        Err(Error::AlreadyOnboarded)?
+    }
+
+    data.validate()
+        .map_err(|error| Error::FailedValidation { error })?;
+
+    if User::is_username_taken(&data.username).await? {
+        return Err(Error::UsernameTaken);
+    }
+
+    get_collection("users")
+        .insert_one(
+            doc! {
+                "_id": session.user_id,
+                "username": &data.username
+            },
+            None,
+        )
+        .await
+        .map_err(|_| Error::DatabaseError {
+            operation: "insert_one",
+            with: "user",
+        })?;
+
+    Ok(())
+}

src/routes/onboard/hello.rs

@@ -0,0 +1,11 @@
+use crate::database::*;
+
+use rauth::auth::Session;
+use rocket_contrib::json::JsonValue;
+
+#[get("/hello")]
+pub async fn req(_session: Session, user: Option<User>) -> JsonValue {
+    json!({
+        "onboarding": user.is_none()
+    })
+}

src/routes/onboard/mod.rs

@@ -0,0 +1,8 @@
+use rocket::Route;
+
+mod complete;
+mod hello;
+
+pub fn routes() -> Vec<Route> {
+    routes![hello::req, complete::req]
+}

src/routes/push/mod.rs

@@ -0,0 +1,8 @@
+use rocket::Route;
+
+mod subscribe;
+mod unsubscribe;
+
+pub fn routes() -> Vec<Route> {
+    routes![subscribe::req, unsubscribe::req]
+}

src/routes/push/subscribe.rs

@@ -0,0 +1,37 @@
+use crate::database::*;
+use crate::util::result::{Error, Result};
+
+use mongodb::bson::{doc, to_document};
+use rauth::auth::Session;
+use rocket_contrib::json::Json;
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize)]
+pub struct Subscription {
+    endpoint: String,
+    p256dh: String,
+    auth: String,
+}
+
+#[post("/subscribe", data = "<data>")]
+pub async fn req(session: Session, data: Json<Subscription>) -> Result<()> {
+    let data = data.into_inner();
+    get_collection("accounts")
+        .update_one(
+            doc! {
+                "_id": session.user_id,
+                "sessions.id": session.id.unwrap()
+            },
+            doc! {
+                "$set": {
+                    "sessions.$.subscription": to_document(&data)
+                        .map_err(|_| Error::DatabaseError { operation: "to_document", with: "subscription" })?
+                }
+            },
+            None,
+        )
+        .await
+        .map_err(|_| Error::DatabaseError { operation: "update_one", with: "account" })?;
+
+    Ok(())
+}

src/routes/push/unsubscribe.rs

@@ -0,0 +1,29 @@
+use crate::database::*;
+use crate::util::result::{Error, Result};
+
+use mongodb::bson::doc;
+use rauth::auth::Session;
+
+#[post("/unsubscribe")]
+pub async fn req(session: Session) -> Result<()> {
+    get_collection("accounts")
+        .update_one(
+            doc! {
+                "_id": session.user_id,
+                "sessions.id": session.id.unwrap()
+            },
+            doc! {
+                "$unset": {
+                    "sessions.$.subscription": 1
+                }
+            },
+            None,
+        )
+        .await
+        .map_err(|_| Error::DatabaseError {
+            operation: "to_document",
+            with: "subscription",
+        })?;
+
+    Ok(())
+}

src/routes/root.rs

@@ -1,11 +1,38 @@
-use super::Response;
+use crate::util::variables::{
+    APP_URL, AUTUMN_URL, EXTERNAL_WS_URL, HCAPTCHA_SITEKEY, INVITE_ONLY, JANUARY_URL, USE_AUTUMN,
+    USE_EMAIL, USE_HCAPTCHA, USE_JANUARY, USE_VOSO, VAPID_PUBLIC_KEY, VOSO_URL, VOSO_WS_HOST,
+};
 
-use bson::doc;
+use mongodb::bson::doc;
+use rocket_contrib::json::JsonValue;
 
-/// root
 #[get("/")]
-pub fn root() -> Response {
-    Response::Success(json!({
-        "revolt": "0.1.0"
-    }))
+pub async fn root() -> JsonValue {
+    json!({
+        "revolt": crate::version::VERSION,
+        "features": {
+            "captcha": {
+                "enabled": *USE_HCAPTCHA,
+                "key": HCAPTCHA_SITEKEY.to_string()
+            },
+            "email": *USE_EMAIL,
+            "invite_only": *INVITE_ONLY,
+            "autumn": {
+                "enabled": *USE_AUTUMN,
+                "url": *AUTUMN_URL
+            },
+            "january": {
+                "enabled": *USE_JANUARY,
+                "url": *JANUARY_URL
+            },
+            "voso": {
+                "enabled": *USE_VOSO,
+                "url": *VOSO_URL,
+                "ws": *VOSO_WS_HOST
+            }
+        },
+        "ws": *EXTERNAL_WS_URL,
+        "app": *APP_URL,
+        "vapid": *VAPID_PUBLIC_KEY
+    })
 }