refactor(core): use core crates for sending messages

fix: idempotency token should use correct crate cfg

.env.example

@@ -59,6 +59,9 @@ REVOLT_UNSAFE_NO_EMAIL=1
 ## Application Settings
 ##
 
+# Whether to enable staging only features
+REVOLT_IS_STAGING=1
+
 # Whether to only allow users to sign up if they have an invite code
 REVOLT_INVITE_ONLY=0
 

.gitignore

@@ -4,3 +4,4 @@ target
 .env
 
 .vercel
+.DS_Store

.vscode/settings.json

@@ -1,4 +1,5 @@
 {
-    "editor.formatOnSave": true,
+  "editor.formatOnSave": true,
-    "rust-analyzer.checkOnSave.command": "clippy"
+  "rust-analyzer.checkOnSave.command": "clippy",
-}
+  "nixEnvSelector.suggestion": false
+}

Cargo.toml

@@ -3,4 +3,5 @@ members = ["crates/delta", "crates/bonfire", "crates/quark", "crates/core/*"]
 
 [patch.crates-io]
 # mobc-redis = { git = "https://github.com/insertish/mobc", rev = "8b880bb59f2ba80b4c7bc40c649c113d8857a186" }
-redis = { git = "https://github.com/insertish/redis-rs", rev = "1a41faf356fd21aebba71cea7eb7eb2653e5f0ef" }
+redis22 = { package = "redis", version = "0.22.3", git = "https://github.com/revoltchat/redis-rs", rev = "1a41faf356fd21aebba71cea7eb7eb2653e5f0ef" }
+redis23 = { package = "redis", version = "0.23.1", git = "https://github.com/revoltchat/redis-rs", rev = "f8ca28ab85da59d2ccde526b4d2fb390eff5a5f9" }

Dockerfile

@@ -20,6 +20,7 @@ COPY Cargo.toml Cargo.lock ./
 COPY crates/bonfire/Cargo.toml ./crates/bonfire/
 COPY crates/delta/Cargo.toml ./crates/delta/
 COPY crates/quark/Cargo.toml ./crates/quark/
+COPY crates/core/config/Cargo.toml ./crates/core/config/
 COPY crates/core/database/Cargo.toml ./crates/core/database/
 COPY crates/core/models/Cargo.toml ./crates/core/models/
 COPY crates/core/permissions/Cargo.toml ./crates/core/permissions/

Dockerfile.useCurrentArch

@@ -0,0 +1,29 @@
+# Build Stage
+FROM rust:1.70.0-slim
+USER 0:0
+WORKDIR /home/rust/src
+
+# Install build requirements
+RUN apt-get update && \
+    apt-get install -y \
+    make \
+    pkg-config \
+    libssl-dev
+COPY scripts/build-image-layer.sh /tmp/
+
+# Build all dependencies
+COPY Cargo.toml Cargo.lock ./
+COPY crates/bonfire/Cargo.toml ./crates/bonfire/
+COPY crates/delta/Cargo.toml ./crates/delta/
+COPY crates/quark/Cargo.toml ./crates/quark/
+COPY crates/core/config/Cargo.toml ./crates/core/config/
+COPY crates/core/database/Cargo.toml ./crates/core/database/
+COPY crates/core/models/Cargo.toml ./crates/core/models/
+COPY crates/core/permissions/Cargo.toml ./crates/core/permissions/
+COPY crates/core/presence/Cargo.toml ./crates/core/presence/
+COPY crates/core/result/Cargo.toml ./crates/core/result/
+RUN sh /tmp/build-image-layer.sh deps
+
+# Build all apps
+COPY crates ./crates
+RUN sh /tmp/build-image-layer.sh apps

README.md

@@ -21,6 +21,10 @@ Note: `january`, `autumn`, and `vortex` are yet to be moved into this monorepo.
 - [Revolt Testers Server](https://app.revolt.chat/invite/Testers)
 - [Contribution Guide](https://developers.revolt.chat/contributing)
 
+## Minimum Supported Rust Version
+
+Rust 1.70 or higher.
+
 ## Contributing
 
 The contribution guide is located at [developers.revolt.chat/contributing](https://developers.revolt.chat/contributing).

STYLE_GUIDE.md

@@ -2,6 +2,10 @@
 
 Beyond using Cargo format and Clippy, there are some specific code style guidelines laid out in this document for different parts of the project.
 
+## Writing Style
+
+- Shorten "identifier" to "Id" with that exact casing, i.e. Server Id.
+
 ## `core/database` crate
 
 w.r.t. `model.rs` files
@@ -22,6 +26,7 @@ w.r.t. `model.rs` files
   );
   ```
 - `auto_derived!` macro accepts multiple entries and should be used as such:
+
   ```rust
   auto_derived!(
     /// Optional fields on server object
@@ -31,6 +36,7 @@ w.r.t. `model.rs` files
     pub enum FieldsRole { .. }
   );
   ```
+
 - If special serialisation conditions are required, such as checking if a boolean is false, use the existing definitions for these functions from the crate root:
   ```rust
   #[serde(skip_serializing_if = "crate::if_false", default)]

clippy.toml

@@ -1,15 +1,26 @@
 disallowed-methods = [
     # Shouldn't need to access these directly
     "revolt_database::models::bots::model::Bot::remove_field",
+    "revolt_database::models::messages::model::Message::attach_sendable_embed",
 
     # Prefer to use Object::create()
-    "revolt_database::models::safety_strikes::ops::AbstractAccountStrikes::insert_account_strike",
+    "revolt_database::models::bots::ops::AbstractBots::insert_bot",
+    "revolt_database::models::channel_invites::ops::AbstractChannelInvites::insert_invite",
+    "revolt_database::models::channel_unreads::ops::AbstractChannelUnreads::acknowledge_message",
+    "revolt_database::models::channel_webhooks::ops::AbstractWebhooks::insert_webhook",
+    "revolt_database::models::channels::ops::AbstractChannels::insert_channel",
+    "revolt_database::models::emojis::ops::AbstractEmojis::insert_emoji",
+    "revolt_database::models::files::ops::AbstractAttachments::insert_attachment",
+    "revolt_database::models::messages::ops::AbstractMessages::insert_message",
+    "revolt_database::models::ratelimit_events::ops::AbstractRatelimitEvents::insert_ratelimit_event",
+    "revolt_database::models::server_bans::ops::AbstractServerBans::insert_ban",
+    "revolt_database::models::server_members::ops::AbstractServerMembers::insert_member",
+    "revolt_database::models::servers::ops::AbstractServers::insert_server",
+    "revolt_database::models::users::ops::AbstractUsers::insert_user",
 
     # Prefer to use Object::update(&self)
     "revolt_database::models::bots::ops::AbstractBots::update_bot",
-    "revolt_database::models::safety_strikes::ops::AbstractAccountStrikes::update_account_strike",
 
     # Prefer to use Object::delete(&self)
     "revolt_database::models::bots::ops::AbstractBots::delete_bot",
-    "revolt_database::models::safety_strikes::ops::AbstractAccountStrikes::delete_account_strike",
 ]

crates/bonfire/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "revolt-bonfire"
-version = "0.6.1"
+version = "0.6.8"
 license = "AGPL-3.0-or-later"
 edition = "2021"
 
@@ -25,7 +25,12 @@ serde = "1.0.136"
 # async
 futures = "0.3.21"
 async-tungstenite = { version = "0.17.0", features = ["async-std-runtime"] }
-async-std = { version = "1.8.0", features = ["tokio1", "tokio02", "attributes"] }
+async-std = { version = "1.8.0", features = [
+    "tokio1",
+    "tokio02",
+    "attributes",
+] }
 
 # core
-revolt-presence = { path = "../core/presence", features = [ "redis-is-patched" ] }
+revolt-presence = { path = "../core/presence", features = ["redis-is-patched"] }
+sentry = "0.31.5"

crates/bonfire/src/websocket.rs

@@ -136,13 +136,13 @@ pub fn spawn_client(db: &'static Database, stream: TcpStream, addr: SocketAddr)
                                             );*/
 
                                             // Handle incoming events.
-                                            match conn.on_message().next().await.map(|item| {
+                                            match conn.on_message().next().await.map(|res| {
-                                                (
+                                                res.map(|item|(
                                                     item.get_channel_name().to_string(),
                                                     redis_kiss::decode_payload::<EventV1>(&item),
-                                                )
+                                                ))
                                             }) {
-                                                Some((channel, item)) => {
+                                                Some(Ok((channel, item))) => {
                                                     if let Ok(mut event) = item {
                                                         if state
                                                             .handle_incoming_event_v1(
@@ -160,6 +160,11 @@ pub fn spawn_client(db: &'static Database, stream: TcpStream, addr: SocketAddr)
                                                         warn!("Failed to deserialise an event for {channel}!");
                                                     }
                                                 }
+                                                Some(Err(e)) => {
+                                                    info!("Error while consuming pub/sub messages: {e:?}");
+                                                    sentry::capture_error(&e);
+                                                    break
+                                                }
                                                 // No more data, assume we disconnected or otherwise
                                                 // something bad occurred, so disconnect user.
                                                 None => break,

crates/core/config/Cargo.toml

@@ -0,0 +1,26 @@
+[package]
+name = "revolt-config"
+version = "0.6.8"
+edition = "2021"
+license = "AGPL-3.0-or-later"
+authors = ["Paul Makles <me@insrt.uk>"]
+description = "Revolt Backend: Configuration"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[features]
+test = ["async-std"]
+default = ["test"]
+
+[dependencies]
+# Utility
+config = "0.13.3"
+cached = "0.44.0"
+once_cell = "1.18.0"
+
+# Serde
+serde = { version = "1", features = ["derive"] }
+
+# Async
+futures-locks = "0.7.1"
+async-std = { version = "1.8.0", features = ["attributes"], optional = true }

crates/core/config/Revolt.toml

@@ -0,0 +1,66 @@
+[database]
+mongodb = "mongodb://database"
+redis = "redis://redis/"
+
+[hosts]
+app = "http://local.revolt.chat"
+api = "http://local.revolt.chat/api"
+events = "ws://local.revolt.chat/ws"
+autumn = "http://local.revolt.chat/autumn"
+january = "http://local.revolt.chat/january"
+voso_legacy = ""
+voso_legacy_ws = ""
+
+[api]
+staging = false
+
+[api.registration]
+invite_only = false
+
+[api.smtp]
+host = ""
+username = ""
+password = ""
+from_address = ""
+
+[api.vapid]
+private_key = "LS0tLS1CRUdJTiBFQyBQUklWQVRFIEtFWS0tLS0tCk1IY0NBUUVFSUJSUWpyTWxLRnBiVWhsUHpUbERvcEliYk1yeVNrNXpKYzVYVzIxSjJDS3hvQW9HQ0NxR1NNNDkKQXdFSG9VUURRZ0FFWnkrQkg2TGJQZ2hEa3pEempXOG0rUXVPM3pCajRXT1phdkR6ZU00c0pqbmFwd1psTFE0WAp1ZDh2TzVodU94QWhMQlU3WWRldVovWHlBdFpWZmNyQi9BPT0KLS0tLS1FTkQgRUMgUFJJVkFURSBLRVktLS0tLQo"
+public_key = "BGcvgR-i2z4IQ5Mw841vJvkLjt8wY-FjmWrw83jOLCY52qcGZS0OF7nfLzuYbjsQISwVO2HXrmf18gLWVX3Kwfw="
+
+[api.fcm]
+api_key = ""
+
+[api.security]
+authifier_shield_key = ""
+voso_legacy_token = ""
+
+[api.security.captcha]
+hcaptcha_key = ""
+hcaptcha_sitekey = ""
+
+[api.workers]
+max_concurrent_connections = 50
+
+[features]
+
+[features.limits]
+
+[features.limits.default]
+group_size = 100
+bots = 5
+message_length = 2000
+message_embeds = 5
+message_replies = 5
+message_attachments = 5
+message_reactions = 20
+servers = 100
+server_emoji = 100
+server_roles = 200
+server_channels = 200
+
+attachment_size = 20000000
+avatar_size = 4000000
+background_size = 6000000
+icon_size = 2500000
+banner_size = 6000000
+emoji_size = 500000

crates/core/config/src/lib.rs

@@ -0,0 +1,164 @@
+use std::collections::HashMap;
+
+use cached::proc_macro::cached;
+use config::{Config, File, FileFormat};
+use futures_locks::RwLock;
+use once_cell::sync::Lazy;
+use serde::Deserialize;
+
+static CONFIG_BUILDER: Lazy<RwLock<Config>> = Lazy::new(|| {
+    RwLock::new({
+        let mut builder = Config::builder().add_source(File::from_str(
+            include_str!("../Revolt.toml"),
+            FileFormat::Toml,
+        ));
+
+        if std::path::Path::new("revolt.toml").exists() {
+            builder = builder.add_source(File::new("revolt.toml", FileFormat::Toml));
+        }
+
+        builder.build().unwrap()
+    })
+});
+
+// https://gifbox.me/view/gT5mqxYKCZv-twilight-meow
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct Database {
+    pub mongodb: String,
+    pub redis: String,
+}
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct Hosts {
+    pub app: String,
+    pub api: String,
+    pub events: String,
+    pub autumn: String,
+    pub january: String,
+    pub voso_legacy: String,
+    pub voso_legacy_ws: String,
+}
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct ApiRegistration {
+    pub invite_only: bool,
+}
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct ApiSmtp {
+    pub host: String,
+    pub username: String,
+    pub password: String,
+    pub from_address: String,
+}
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct ApiVapid {
+    pub private_key: String,
+    pub public_key: String,
+}
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct ApiFcm {
+    pub api_key: String,
+}
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct ApiSecurityCaptcha {
+    pub hcaptcha_key: String,
+    pub hcaptcha_sitekey: String,
+}
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct ApiSecurity {
+    pub authifier_shield_key: String,
+    pub voso_legacy_token: String,
+    pub captcha: ApiSecurityCaptcha,
+}
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct ApiWorkers {
+    pub max_concurrent_connections: usize,
+}
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct Api {
+    pub staging: bool,
+    pub registration: ApiRegistration,
+    pub smtp: ApiSmtp,
+    pub vapid: ApiVapid,
+    pub fcm: ApiFcm,
+    pub security: ApiSecurity,
+    pub workers: ApiWorkers,
+}
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct FeaturesLimits {
+    pub group_size: usize,
+    pub bots: usize,
+    pub message_length: usize,
+    pub message_replies: usize,
+    pub message_attachments: usize,
+    pub message_embeds: usize,
+    pub message_reactions: usize,
+    pub servers: usize,
+    pub server_emoji: usize,
+    pub server_roles: usize,
+    pub server_channels: usize,
+
+    pub attachment_size: usize,
+    pub avatar_size: usize,
+    pub background_size: usize,
+    pub icon_size: usize,
+    pub banner_size: usize,
+    pub emoji_size: usize,
+}
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct FeaturesLimitsCollection {
+    pub default: FeaturesLimits,
+
+    #[serde(flatten)]
+    pub roles: HashMap<String, FeaturesLimits>,
+}
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct Features {
+    pub limits: FeaturesLimitsCollection,
+}
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct Settings {
+    pub database: Database,
+    pub hosts: Hosts,
+    pub api: Api,
+    pub features: Features,
+}
+
+pub async fn init() {
+    println!(
+        ":: Revolt Configuration ::\n\x1b[32m{:?}\x1b[0m",
+        config().await
+    );
+}
+
+pub async fn read() -> Config {
+    CONFIG_BUILDER.read().await.clone()
+}
+
+#[cached(time = 30)]
+pub async fn config() -> Settings {
+    read().await.try_deserialize::<Settings>().unwrap()
+}
+
+#[cfg(feature = "test")]
+#[cfg(test)]
+mod tests {
+    use crate::init;
+
+    #[async_std::test]
+    async fn it_works() {
+        init().await;
+    }
+}

crates/core/database/Cargo.toml

@@ -1,38 +1,51 @@
 [package]
 name = "revolt-database"
-version = "0.6.1"
+version = "0.6.8"
 edition = "2021"
 license = "AGPL-3.0-or-later"
-authors = [ "Paul Makles <me@insrt.uk>" ]
+authors = ["Paul Makles <me@insrt.uk>"]
 description = "Revolt Backend: Database Implementation"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [features]
 # Databases
-mongodb = [ "dep:mongodb", "bson" ]
+mongodb = ["dep:mongodb", "bson"]
 
 # ... Other
-async-std-runtime = [ "async-std" ]
+tasks = ["isahc", "linkify", "url-escape"]
-rocket-impl = [ "rocket", "schemars" ]
+async-std-runtime = ["async-std"]
-redis-is-patched = [ "revolt-presence/redis-is-patched" ]
+rocket-impl = ["rocket", "schemars", "revolt_okapi", "revolt_rocket_okapi"]
+redis-is-patched = ["revolt-presence/redis-is-patched"]
 
 # Default Features
-default = [ "mongodb", "async-std-runtime" ]
+default = ["mongodb", "async-std-runtime", "tasks"]
 
 [dependencies]
 # Core
-revolt-result = { version = "0.6.1", path = "../result" }
+revolt-config = { version = "0.6.8", path = "../config" }
-revolt-models = { version = "0.6.1", path = "../models" }
+revolt-result = { version = "0.6.8", path = "../result" }
-revolt-presence = { version = "0.6.1", path = "../presence" }
+revolt-models = { version = "0.6.8", path = "../models" }
-revolt-permissions = { version = "0.6.1", path = "../permissions", features = [ "serde", "bson" ] }
+revolt-presence = { version = "0.6.8", path = "../presence" }
+revolt-permissions = { version = "0.6.8", path = "../permissions", features = [
+    "serde",
+    "bson",
+] }
 
 # Utility
 log = "0.4"
+lru = "0.11.0"
 rand = "0.8.5"
 ulid = "1.0.0"
 nanoid = "0.4.0"
+base64 = "0.21.3"
 once_cell = "1.17"
+indexmap = "1.9.1"
+decancer = "1.6.2"
+deadqueue = "0.2.4"
+linkify = { optional = true, version = "0.8.1" }
+url-escape = { optional = true, version = "0.1.1" }
+isahc = { optional = true, version = "1.7", features = ["json"] }
 
 # Serialisation
 serde_json = "1"
@@ -53,6 +66,7 @@ regex = "1"
 
 # Async Language Features
 futures = "0.3.19"
+async-lock = "2.8.0"
 async-trait = "0.1.51"
 async-recursion = "1.0.4"
 
@@ -61,7 +75,15 @@ async-std = { version = "1.8.0", features = ["attributes"], optional = true }
 
 # Rocket Impl
 schemars = { version = "0.8.8", optional = true }
-rocket = { version = "0.5.0-rc.2", default-features = false, features = ["json"], optional = true }
+rocket = { version = "0.5.0-rc.2", default-features = false, features = [
+    "json",
+], optional = true }
+revolt_okapi = { version = "0.9.1", optional = true }
+revolt_rocket_okapi = { version = "0.9.1", optional = true }
+
+# Notifications
+fcm = "0.9.2"
+web-push = "0.10.0"
 
 # Authifier
 authifier = { version = "1.0" }

crates/core/database/src/drivers/mod.rs

@@ -65,3 +65,14 @@ impl DatabaseInfo {
         })
     }
 }
+
+impl From<Database> for authifier::Database {
+    fn from(value: Database) -> Self {
+        match value {
+            Database::Reference(_) => Default::default(),
+            Database::MongoDb(MongoDb(client, _)) => authifier::Database::MongoDb(
+                authifier::database::MongoDb(client.database("revolt")),
+            ),
+        }
+    }
+}

crates/core/database/src/drivers/mongodb.rs

@@ -238,6 +238,6 @@ pub fn prefix_keys<T: Serialize>(t: &T, prefix: &str) -> HashMap<String, serde_j
     let v: HashMap<String, serde_json::Value> = serde_json::from_str(&v).unwrap();
     v.into_iter()
         .filter(|(_k, v)| !v.is_null())
-        .map(|(k, v)| (prefix.to_owned() + &k, v))
+        .map(|(k, v)| (format!("{}{}", prefix.to_owned(), k), v))
         .collect()
 }

crates/core/database/src/drivers/reference.rs

@@ -3,29 +3,28 @@ use std::{collections::HashMap, sync::Arc};
 use futures::lock::Mutex;
 
 use crate::{
-    AccountStrike, Bot, Channel, File, Member, MemberCompositeKey, Server, User, UserSettings,
+    Bot, Channel, ChannelCompositeKey, ChannelUnread, Emoji, File, Invite, Member,
-    Webhook,
+    MemberCompositeKey, Message, Server, ServerBan, User, UserSettings, Webhook,
 };
 
 database_derived!(
     /// Reference implementation
     #[derive(Default)]
     pub struct ReferenceDb {
-        pub account_strikes: Arc<Mutex<HashMap<String, AccountStrike>>>,
         pub bots: Arc<Mutex<HashMap<String, Bot>>>,
+        pub channels: Arc<Mutex<HashMap<String, Channel>>>,
+        pub channel_invites: Arc<Mutex<HashMap<String, Invite>>>,
+        pub channel_unreads: Arc<Mutex<HashMap<ChannelCompositeKey, ChannelUnread>>>,
         pub channel_webhooks: Arc<Mutex<HashMap<String, Webhook>>>,
+        pub emojis: Arc<Mutex<HashMap<String, Emoji>>>,
+        pub files: Arc<Mutex<HashMap<String, File>>>,
+        pub messages: Arc<Mutex<HashMap<String, Message>>>,
         pub user_settings: Arc<Mutex<HashMap<String, UserSettings>>>,
         pub users: Arc<Mutex<HashMap<String, User>>>,
+        pub server_bans: Arc<Mutex<HashMap<MemberCompositeKey, ServerBan>>>,
         pub server_members: Arc<Mutex<HashMap<MemberCompositeKey, Member>>>,
         pub servers: Arc<Mutex<HashMap<String, Server>>>,
-        pub files: Arc<Mutex<HashMap<String, File>>>,
-        pub server_bans: Arc<Mutex<HashMap<String, ()>>>,
         pub safety_reports: Arc<Mutex<HashMap<String, ()>>>,
         pub safety_snapshots: Arc<Mutex<HashMap<String, ()>>>,
-        pub emoji: Arc<Mutex<HashMap<String, ()>>>,
-        pub messages: Arc<Mutex<HashMap<String, ()>>>,
-        pub channels: Arc<Mutex<HashMap<String, Channel>>>,
-        pub channel_invites: Arc<Mutex<HashMap<String, ()>>>,
-        pub channel_unreads: Arc<Mutex<HashMap<String, ()>>>,
     }
 );

crates/core/database/src/events/client.rs

@@ -2,7 +2,10 @@ use authifier::AuthifierEvent;
 use serde::{Deserialize, Serialize};
 
 use revolt_models::v0::{
-    Channel, FieldsChannel, FieldsWebhook, PartialChannel, PartialWebhook, Webhook,
+    AppendMessage, Channel, Emoji, FieldsChannel, FieldsMember, FieldsRole, FieldsServer,
+    FieldsUser, FieldsWebhook, MemberCompositeKey, Message, PartialChannel, PartialMember,
+    PartialMessage, PartialRole, PartialServer, PartialUser, PartialWebhook, Server, UserSettings,
+    Webhook,
 };
 use revolt_result::Error;
 
@@ -55,8 +58,7 @@ pub enum EventV1 {
     },
 
     /// Ping response
-    Pong { data: Ping },
+    Pong { data: Ping }, */
-
     /// New message
     Message(Message),
 
@@ -152,18 +154,17 @@ pub enum EventV1 {
         event_id: Option<String>,
     },
 
-    /// Relationship with another user changed
+    /*/// Relationship with another user changed
     UserRelationship {
         id: String,
         user: User,
         // ! this field can be deprecated
         status: RelationshipStatus,
-    },
+    },*/
-
     /// Settings updated remotely
     UserSettingsUpdate { id: String, update: UserSettings },
 
-    /// User has been platform banned or deleted their account
+    /*/// User has been platform banned or deleted their account
     ///
     /// Clients should remove the following associated data:
     /// - Messages
@@ -172,15 +173,14 @@ pub enum EventV1 {
     /// - Server Memberships
     ///
     /// User flags are specified to explain why a wipe is occurring though not all reasons will necessarily ever appear.
-    UserPlatformWipe { user_id: String, flags: i32 },
+    UserPlatformWipe { user_id: String, flags: i32 }, */
-
     /// New emoji
     EmojiCreate(Emoji),
 
     /// Delete emoji
     EmojiDelete { id: String },
 
-    /// New report
+    /*/// New report
     ReportCreate(Report), */
     /// New channel
     ChannelCreate(Channel),

crates/core/database/src/lib.rs

@@ -43,7 +43,7 @@ macro_rules! auto_derived {
 
 macro_rules! auto_derived_partial {
     ( $item:item, $name:expr ) => {
-        #[derive(OptionalStruct, Serialize, Deserialize, Debug, Clone, Default, Eq, PartialEq)]
+        #[derive(OptionalStruct, Serialize, Deserialize, Debug, Clone, Eq, PartialEq)]
         #[optional_derive(Serialize, Deserialize, Debug, Clone, Default, Eq, PartialEq)]
         #[optional_name = $name]
         #[opt_skip_serializing_none]
@@ -81,6 +81,7 @@ pub mod util;
 pub use models::*;
 
 pub mod events;
+pub mod tasks;
 
 /// Utility function to check if a boolean value is false
 pub fn if_false(t: &bool) -> bool {

crates/core/database/src/models/admin_migrations/ops/mongodb/init.rs

@@ -76,6 +76,10 @@ pub async fn create_database(db: &MongoDb) {
         .await
         .expect("Failed to create bots collection.");
 
+    db.create_collection("ratelimit_events", None)
+        .await
+        .expect("Failed to create ratelimit_events collection.");
+
     db.create_collection(
         "pubsub",
         CreateCollectionOptions::builder()
@@ -209,5 +213,24 @@ pub async fn create_database(db: &MongoDb) {
         .await
         .expect("Failed to save migration info.");
 
+    db.run_command(
+        doc! {
+            "createIndexes": "ratelimit_events",
+            "indexes": [
+                {
+                    "key": {
+                        "_id": 1_i32,
+                        "target_id": 1_i32,
+                        "event_type": 1_i32,
+                    },
+                    "name": "compound_key"
+                }
+            ]
+        },
+        None,
+    )
+    .await
+    .expect("Failed to create ratelimit_events index.");
+
     info!("Created database.");
 }

crates/core/database/src/models/admin_migrations/ops/mongodb/scripts.rs

@@ -9,6 +9,7 @@ use crate::{
 };
 use futures::StreamExt;
 use rand::seq::SliceRandom;
+use revolt_permissions::DEFAULT_WEBHOOK_PERMISSIONS;
 use serde::{Deserialize, Serialize};
 use unicode_segmentation::UnicodeSegmentation;
 
@@ -18,7 +19,7 @@ struct MigrationInfo {
     revision: i32,
 }
 
-pub const LATEST_REVISION: i32 = 25;
+pub const LATEST_REVISION: i32 = 26;
 
 pub async fn migrate_database(db: &MongoDb) {
     let migrations = db.col::<Document>("migrations");
@@ -696,7 +697,9 @@ pub async fn run_migrations(db: &MongoDb, revision: i32) -> i32 {
     }
 
     if revision <= 19 {
-        info!("Running migration [revision 19 / 27-02-2023]: Create report / snapshot collections, migrate to new model if applicable.");
+        info!(
+            "Running migration [revision 19 / 27-02-2023]: Create report / snapshot collections."
+        );
 
         db.db()
             .create_collection("safety_reports", None)
@@ -707,19 +710,6 @@ pub async fn run_migrations(db: &MongoDb, revision: i32) -> i32 {
             .create_collection("safety_snapshots", None)
             .await
             .unwrap();
-
-        db.col::<Document>("safety_reports")
-            .update_many(
-                doc! {},
-                doc! {
-                    "$set": {
-                        "status": "Created"
-                    }
-                },
-                None,
-            )
-            .await
-            .unwrap();
     }
 
     if revision <= 20 {
@@ -945,10 +935,56 @@ pub async fn run_migrations(db: &MongoDb, revision: i32) -> i32 {
             )
             .await
             .expect("Failed to create username index.");
+    };
+
+    if revision <= 25 {
+        info!("Running migration [revision 25 / 11-06-2023]: Add permissions to webhooks.");
+
+        db.col::<Document>("webhooks")
+            .update_many(
+                doc! {},
+                doc! {
+                    "$set": {
+                        "permissions": *DEFAULT_WEBHOOK_PERMISSIONS as i64
+                    }
+                },
+                None,
+            )
+            .await
+            .expect("Failed to update webhooks.");
+    }
+
+    if revision <= 25 {
+        info!("Running migration [revision 25 / 15-06-2023]: Add collection `ratelimit_events` with index.");
+
+        db.db()
+            .create_collection("ratelimit_events", None)
+            .await
+            .ok();
+
+        db.db()
+            .run_command(
+                doc! {
+                    "createIndexes": "ratelimit_events",
+                    "indexes": [
+                        {
+                            "key": {
+                                "_id": 1_i32,
+                                "target_id": 1_i32,
+                                "event_type": 1_i32,
+                            },
+                            "name": "compound_key"
+                        }
+                    ]
+                },
+                None,
+            )
+            .await
+            .expect("Failed to create ratelimit_events index.");
     }
 
     // Need to migrate fields on attachments, change `user_id`, `object_id`, etc to `parent`.
 
     // Reminder to update LATEST_REVISION when adding new migrations.
-    LATEST_REVISION
+    LATEST_REVISION.max(revision)
 }

crates/core/database/src/models/bots/model.rs

@@ -1,6 +1,7 @@
 use revolt_result::Result;
+use ulid::Ulid;
 
-use crate::Database;
+use crate::{BotInformation, Database, PartialUser, User};
 
 auto_derived_partial!(
     /// Bot
@@ -49,8 +50,71 @@ auto_derived!(
     }
 );
 
+#[allow(clippy::derivable_impls)]
+impl Default for Bot {
+    fn default() -> Self {
+        Self {
+            id: Default::default(),
+            owner: Default::default(),
+            token: Default::default(),
+            public: Default::default(),
+            analytics: Default::default(),
+            discoverable: Default::default(),
+            interactions_url: Default::default(),
+            terms_of_service_url: Default::default(),
+            privacy_policy_url: Default::default(),
+            flags: Default::default(),
+        }
+    }
+}
+
 #[allow(clippy::disallowed_methods)]
 impl Bot {
+    /// Create a new bot
+    pub async fn create<D>(db: &Database, username: String, owner: &User, data: D) -> Result<Bot>
+    where
+        D: Into<Option<PartialBot>>,
+    {
+        if owner.bot.is_some() {
+            return Err(create_error!(IsBot));
+        }
+
+        // TODO: config
+        let max_bot_count = 5;
+        if db.get_number_of_bots_by_user(&owner.id).await? >= max_bot_count {
+            return Err(create_error!(ReachedMaximumBots));
+        }
+
+        let id = Ulid::new().to_string();
+
+        User::create(
+            db,
+            username,
+            Some(id.to_string()),
+            Some(PartialUser {
+                bot: Some(BotInformation {
+                    owner: id.to_string(),
+                }),
+                ..Default::default()
+            }),
+        )
+        .await?;
+
+        let mut bot = Bot {
+            id,
+            owner: owner.id.to_string(),
+            token: nanoid::nanoid!(64),
+            ..Default::default()
+        };
+
+        if let Some(data) = data.into() {
+            bot.apply_options(data);
+        }
+
+        db.insert_bot(&bot).await?;
+        Ok(bot)
+    }
+
     /// Remove a field from this object
     pub fn remove_field(&mut self, field: &FieldsBot) {
         match field {
@@ -96,27 +160,24 @@ mod tests {
     #[async_std::test]
     async fn crud() {
         database_test!(|db| async move {
-            let bot_id = "bot";
+            let owner = User::create(&db, "Owner".to_string(), None, None)
-            let user_id = "user";
+                .await
-            let token = "my_token";
+                .unwrap();
 
-            let user = User {
+            let bot = Bot::create(
-                id: bot_id.to_string(),
+                &db,
-                username: "Bot Name".to_string(),
+                "Bot Name".to_string(),
-                ..Default::default()
+                &owner,
-            };
+                PartialBot {
+                    token: Some("my token".to_string()),
+                    interactions_url: Some("some url".to_string()),
+                    ..Default::default()
+                },
+            )
+            .await
+            .unwrap();
 
-            db.insert_user(&user).await.unwrap();
+            assert!(!bot.interactions_url.is_empty());
-
-            let bot = Bot {
-                id: bot_id.to_string(),
-                owner: user_id.to_string(),
-                token: token.to_string(),
-                interactions_url: "some url".to_string(),
-                ..Default::default()
-            };
-
-            db.insert_bot(&bot).await.unwrap();
 
             let mut updated_bot = bot.clone();
             updated_bot
@@ -131,9 +192,9 @@ mod tests {
                 .await
                 .unwrap();
 
-            let fetched_bot1 = db.fetch_bot(bot_id).await.unwrap();
+            let fetched_bot1 = db.fetch_bot(&bot.id).await.unwrap();
             let fetched_bot2 = db.fetch_bot_by_token(&fetched_bot1.token).await.unwrap();
-            let fetched_bots = db.fetch_bots_by_user(user_id).await.unwrap();
+            let fetched_bots = db.fetch_bots_by_user(&owner.id).await.unwrap();
 
             assert!(!bot.public);
             assert!(fetched_bot1.public);
@@ -143,12 +204,12 @@ mod tests {
             assert_eq!(updated_bot, fetched_bot1);
             assert_eq!(fetched_bot1, fetched_bot2);
             assert_eq!(fetched_bot1, fetched_bots[0]);
-            assert_eq!(1, db.get_number_of_bots_by_user(user_id).await.unwrap());
+            assert_eq!(1, db.get_number_of_bots_by_user(&owner.id).await.unwrap());
 
             bot.delete(&db).await.unwrap();
-            assert!(db.fetch_bot(bot_id).await.is_err());
+            assert!(db.fetch_bot(&bot.id).await.is_err());
-            assert_eq!(0, db.get_number_of_bots_by_user(user_id).await.unwrap());
+            assert_eq!(0, db.get_number_of_bots_by_user(&owner.id).await.unwrap());
-            assert_eq!(db.fetch_user(bot_id).await.unwrap().flags, Some(2))
+            assert_eq!(db.fetch_user(&bot.id).await.unwrap().flags, Some(2))
         });
     }
 }

crates/core/database/src/models/channel_invites/model.rs

@@ -0,0 +1,101 @@
+use revolt_result::{create_error, Result};
+
+use crate::Database;
+
+/* static 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',
+]; */
+
+auto_derived!(
+    /// Invite
+    pub enum Invite {
+        /// Invite to a specific server channel
+        Server {
+            /// Invite code
+            #[serde(rename = "_id")]
+            code: String,
+            /// Id of the server this invite points to
+            server: String,
+            /// Id of user who created this invite
+            creator: String,
+            /// Id of the server channel this invite points to
+            channel: String,
+        },
+        /// Invite to a group channel
+        Group {
+            /// Invite code
+            #[serde(rename = "_id")]
+            code: String,
+            /// Id of user who created this invite
+            creator: String,
+            /// Id of the group channel this invite points to
+            channel: String,
+        }, /* User {
+               code: String,
+               user: String
+           } */
+    }
+);
+
+#[allow(clippy::disallowed_methods)]
+impl Invite {
+    /// Get the invite code for this invite
+    pub fn code(&'_ self) -> &'_ str {
+        match self {
+            Invite::Server { code, .. } | Invite::Group { code, .. } => code,
+        }
+    }
+
+    /// Get the ID of the user who created this invite
+    pub fn creator(&'_ self) -> &'_ str {
+        match self {
+            Invite::Server { creator, .. } | Invite::Group { creator, .. } => creator,
+        }
+    }
+
+    /// Create a new invite from given information
+    /*pub async fn create_channel_invite(db: &Database, creator_id: String, target: &Channel) -> Result<Invite> {
+        let code = nanoid::nanoid!(8, &ALPHABET);
+        let invite = match &target {
+            Channel::Group { id, .. } => Ok(Invite::Group {
+                code,
+                creator: creator.id.clone(),
+                channel: id.clone(),
+            }),
+            Channel::TextChannel { id, server, .. } | Channel::VoiceChannel { id, server, .. } => {
+                Ok(Invite::Server {
+                    code,
+                    creator: creator.id.clone(),
+                    server: server.clone(),
+                    channel: id.clone(),
+                })
+            }
+            _ => Err(Error::InvalidOperation),
+        }?;
+
+        db.insert_invite(&invite).await?;
+        Ok(invite)
+    }*/
+
+    /// Resolve an invite by its ID or by a public server ID
+    pub async fn find(db: &Database, code: &str) -> Result<Invite> {
+        if let Ok(invite) = db.fetch_invite(code).await {
+            return Ok(invite);
+        } else if let Ok(server) = db.fetch_server(code).await {
+            if server.discoverable {
+                if let Some(channel) = server.channels.into_iter().next() {
+                    return Ok(Invite::Server {
+                        code: code.to_string(),
+                        server: server.id,
+                        creator: server.owner,
+                        channel,
+                    });
+                }
+            }
+        }
+
+        Err(create_error!(NotFound))
+    }
+}

crates/core/database/src/models/channel_invites/ops.rs

@@ -0,0 +1,21 @@
+use revolt_result::Result;
+
+use crate::Invite;
+
+mod mongodb;
+mod reference;
+
+#[async_trait]
+pub trait AbstractChannelInvites: Sync + Send {
+    /// Insert a new invite into the database
+    async fn insert_invite(&self, invite: &Invite) -> Result<()>;
+
+    /// Fetch an invite by its id
+    async fn fetch_invite(&self, code: &str) -> Result<Invite>;
+
+    /// Fetch all invites for a server
+    async fn fetch_invites_for_server(&self, server_id: &str) -> Result<Vec<Invite>>;
+
+    /// Delete an invite by its id
+    async fn delete_invite(&self, code: &str) -> Result<()>;
+}

crates/core/database/src/models/channel_invites/ops/mongodb.rs

@@ -0,0 +1,50 @@
+use futures::StreamExt;
+use revolt_result::Result;
+
+use crate::Invite;
+use crate::MongoDb;
+
+use super::AbstractChannelInvites;
+
+static COL: &str = "channel_invites";
+
+#[async_trait]
+impl AbstractChannelInvites for MongoDb {
+    /// Insert a new invite into the database
+    async fn insert_invite(&self, invite: &Invite) -> Result<()> {
+        query!(self, insert_one, COL, &invite).map(|_| ())
+    }
+
+    /// Fetch an invite by the code
+    async fn fetch_invite(&self, code: &str) -> Result<Invite> {
+        query!(self, find_one_by_id, COL, code)?.ok_or_else(|| create_error!(NotFound))
+    }
+
+    /// Fetch all invites for a server
+    async fn fetch_invites_for_server(&self, server_id: &str) -> Result<Vec<Invite>> {
+        Ok(self
+            .col::<Invite>(COL)
+            .find(
+                doc! {
+                    "server": server_id,
+                },
+                None,
+            )
+            .await
+            .map_err(|_| create_database_error!("find", COL))?
+            .filter_map(|s| async {
+                if cfg!(debug_assertions) {
+                    Some(s.unwrap())
+                } else {
+                    s.ok()
+                }
+            })
+            .collect()
+            .await)
+    }
+
+    /// Delete an invite by its code
+    async fn delete_invite(&self, code: &str) -> Result<()> {
+        query!(self, delete_one_by_id, COL, code).map(|_| ())
+    }
+}

crates/core/database/src/models/channel_invites/ops/reference.rs

@@ -0,0 +1,52 @@
+use revolt_result::Result;
+
+use crate::Invite;
+use crate::ReferenceDb;
+
+use super::AbstractChannelInvites;
+
+#[async_trait]
+impl AbstractChannelInvites for ReferenceDb {
+    /// Insert a new invite into the database
+    async fn insert_invite(&self, invite: &Invite) -> Result<()> {
+        let mut invites = self.channel_invites.lock().await;
+        if invites.contains_key(invite.code()) {
+            Err(create_database_error!("insert", "invite"))
+        } else {
+            invites.insert(invite.code().to_string(), invite.clone());
+            Ok(())
+        }
+    }
+
+    /// Fetch an invite by the code
+    async fn fetch_invite(&self, code: &str) -> Result<Invite> {
+        let invites = self.channel_invites.lock().await;
+        invites
+            .get(code)
+            .cloned()
+            .ok_or_else(|| create_error!(NotFound))
+    }
+
+    /// Fetch all invites for a server
+    async fn fetch_invites_for_server(&self, server_id: &str) -> Result<Vec<Invite>> {
+        let invites = self.channel_invites.lock().await;
+        Ok(invites
+            .values()
+            .filter(|invite| match invite {
+                Invite::Server { server, .. } => server == server_id,
+                _ => false,
+            })
+            .cloned()
+            .collect())
+    }
+
+    /// Delete an invite by its code
+    async fn delete_invite(&self, code: &str) -> Result<()> {
+        let mut invites = self.channel_invites.lock().await;
+        if invites.remove(code).is_some() {
+            Ok(())
+        } else {
+            Err(create_error!(NotFound))
+        }
+    }
+}

crates/core/database/src/models/channel_unreads/mod.rs

@@ -0,0 +1,5 @@
+mod model;
+mod ops;
+
+pub use model::*;
+pub use ops::*;

crates/core/database/src/models/channel_unreads/model.rs

@@ -0,0 +1,24 @@
+auto_derived!(
+    /// Channel Unread
+    pub struct ChannelUnread {
+        /// Composite key pointing to a user's view of a channel
+        #[serde(rename = "_id")]
+        pub id: ChannelCompositeKey,
+
+        /// Id of the last message read in this channel by a user
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub last_id: Option<String>,
+        /// Array of message ids that mention the user
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub mentions: Option<Vec<String>>,
+    }
+
+    /// Composite primary key consisting of channel and user id
+    #[derive(Hash)]
+    pub struct ChannelCompositeKey {
+        /// Channel Id
+        pub channel: String,
+        /// User Id
+        pub user: String,
+    }
+);

crates/core/database/src/models/channel_unreads/ops.rs

@@ -0,0 +1,31 @@
+use revolt_result::Result;
+
+use crate::ChannelUnread;
+
+mod mongodb;
+mod reference;
+
+#[async_trait]
+pub trait AbstractChannelUnreads: Sync + Send {
+    /// Acknowledge a message.
+    async fn acknowledge_message(
+        &self,
+        channel_id: &str,
+        user_id: &str,
+        message_id: &str,
+    ) -> Result<()>;
+
+    /// Acknowledge many channels.
+    async fn acknowledge_channels(&self, user_id: &str, channel_ids: &[String]) -> Result<()>;
+
+    /// Add a mention.
+    async fn add_mention_to_unread<'a>(
+        &self,
+        channel_id: &str,
+        user_id: &str,
+        message_ids: &[String],
+    ) -> Result<()>;
+
+    /// Fetch all channel unreads for a user.
+    async fn fetch_unreads(&self, user_id: &str) -> Result<Vec<ChannelUnread>>;
+}

crates/core/database/src/models/channel_unreads/ops/mongodb.rs

@@ -0,0 +1,119 @@
+use bson::Document;
+use mongodb::options::UpdateOptions;
+use revolt_result::Result;
+use ulid::Ulid;
+
+use crate::ChannelUnread;
+use crate::MongoDb;
+
+use super::AbstractChannelUnreads;
+
+static COL: &str = "channel_unreads";
+
+#[async_trait]
+impl AbstractChannelUnreads for MongoDb {
+    /// Acknowledge a message.
+    async fn acknowledge_message(
+        &self,
+        channel_id: &str,
+        user_id: &str,
+        message_id: &str,
+    ) -> Result<()> {
+        self.col::<Document>(COL)
+            .update_one(
+                doc! {
+                    "_id.channel": channel_id,
+                    "_id.user": user_id,
+                },
+                doc! {
+                    "$unset": {
+                        "mentions": 1_i32
+                    },
+                    "$set": {
+                        "last_id": message_id
+                    }
+                },
+                UpdateOptions::builder().upsert(true).build(),
+            )
+            .await
+            .map(|_| ())
+            .map_err(|_| create_database_error!("update_one", COL))
+    }
+
+    /// Acknowledge many channels.
+    async fn acknowledge_channels(&self, user_id: &str, channel_ids: &[String]) -> Result<()> {
+        let current_time = Ulid::new().to_string();
+
+        self.col::<Document>(COL)
+            .delete_many(
+                doc! {
+                    "_id.channel": {
+                        "$in": channel_ids
+                    },
+                    "_id.user": user_id
+                },
+                None,
+            )
+            .await
+            .map_err(|_| create_database_error!("delete_many", COL))?;
+
+        self.col::<Document>(COL)
+            .insert_many(
+                channel_ids
+                    .iter()
+                    .map(|channel_id| {
+                        doc! {
+                            "_id": {
+                                "channel": channel_id,
+                                "user": user_id
+                            },
+                            "last_id": &current_time
+                        }
+                    })
+                    .collect::<Vec<Document>>(),
+                None,
+            )
+            .await
+            .map(|_| ())
+            .map_err(|_| create_database_error!("update_many", COL))
+    }
+
+    /// Add a mention.
+    async fn add_mention_to_unread<'a>(
+        &self,
+        channel_id: &str,
+        user_id: &str,
+        message_ids: &[String],
+    ) -> Result<()> {
+        self.col::<Document>(COL)
+            .update_one(
+                doc! {
+                    "_id.channel": channel_id,
+                    "_id.user": user_id,
+                },
+                doc! {
+                    "$push": {
+                        "mentions": {
+                            "$each": message_ids
+                        }
+                    }
+                },
+                UpdateOptions::builder().upsert(true).build(),
+            )
+            .await
+            .map(|_| ())
+            .map_err(|_| create_database_error!("update_one", COL))
+    }
+
+    /// Fetch all channel unreads for a user.
+    async fn fetch_unreads(&self, user_id: &str) -> Result<Vec<ChannelUnread>> {
+        query!(
+            self,
+            find,
+            COL,
+            doc! {
+                "_id.user": user_id
+            }
+        )
+    }
+}

crates/core/database/src/models/channel_unreads/ops/reference.rs

@@ -0,0 +1,90 @@
+use revolt_result::Result;
+use ulid::Ulid;
+
+use crate::{ChannelCompositeKey, ChannelUnread, ReferenceDb};
+
+use super::AbstractChannelUnreads;
+
+#[async_trait]
+impl AbstractChannelUnreads for ReferenceDb {
+    /// Acknowledge a message.
+    async fn acknowledge_message(
+        &self,
+        channel_id: &str,
+        user_id: &str,
+        message_id: &str,
+    ) -> Result<()> {
+        let mut unreads = self.channel_unreads.lock().await;
+        let key = ChannelCompositeKey {
+            channel: channel_id.to_string(),
+            user: user_id.to_string(),
+        };
+
+        if let Some(unread) = unreads.get_mut(&key) {
+            unread.mentions = None;
+            unread.last_id.replace(message_id.to_string());
+        } else {
+            unreads.insert(
+                key.clone(),
+                ChannelUnread {
+                    id: key,
+                    last_id: Some(message_id.to_string()),
+                    mentions: None,
+                },
+            );
+        }
+
+        Ok(())
+    }
+
+    /// Acknowledge many channels.
+    async fn acknowledge_channels(&self, user_id: &str, channel_ids: &[String]) -> Result<()> {
+        let current_time = Ulid::new().to_string();
+        for channel_id in channel_ids {
+            #[allow(clippy::disallowed_methods)]
+            self.acknowledge_message(channel_id, user_id, &current_time)
+                .await?;
+        }
+
+        Ok(())
+    }
+
+    /// Add a mention.
+    async fn add_mention_to_unread<'a>(
+        &self,
+        channel_id: &str,
+        user_id: &str,
+        message_ids: &[String],
+    ) -> Result<()> {
+        let mut unreads = self.channel_unreads.lock().await;
+        let key = ChannelCompositeKey {
+            channel: channel_id.to_string(),
+            user: user_id.to_string(),
+        };
+
+        if let Some(unread) = unreads.get_mut(&key) {
+            unread.mentions.replace(message_ids.to_vec());
+        } else {
+            unreads.insert(
+                key.clone(),
+                ChannelUnread {
+                    id: key,
+                    last_id: None,
+                    mentions: Some(message_ids.to_vec()),
+                },
+            );
+        }
+
+        Ok(())
+    }
+
+    /// Fetch all channel unreads for a user.
+    async fn fetch_unreads(&self, user_id: &str) -> Result<Vec<ChannelUnread>> {
+        let unreads = self.channel_unreads.lock().await;
+        Ok(unreads
+            .values()
+            .filter(|unread| unread.id.user == user_id)
+            .cloned()
+            .collect())
+    }
+}

crates/core/database/src/models/channel_webhooks/model.rs

@@ -20,6 +20,9 @@ auto_derived_partial!(
         /// The channel this webhook belongs to
         pub channel_id: String,
 
+        /// The permissions of the webhook
+        pub permissions: u64,
+
         /// The private token for the webhook
         pub token: Option<String>,
     },
@@ -33,6 +36,20 @@ auto_derived!(
     }
 );
 
+#[allow(clippy::derivable_impls)]
+impl Default for Webhook {
+    fn default() -> Self {
+        Self {
+            id: Default::default(),
+            name: Default::default(),
+            avatar: None,
+            channel_id: Default::default(),
+            permissions: Default::default(),
+            token: Default::default(),
+        }
+    }
+}
+
 #[allow(clippy::disallowed_methods)]
 impl Webhook {
     pub async fn create(&self, db: &Database) -> Result<()> {
@@ -117,7 +134,7 @@ mod tests {
                 id: webhook_id.to_string(),
                 name: "Webhook Name".to_string(),
                 channel_id: channel_id.to_string(),
-                avatar: Some(Default::default()),
+                avatar: None,
                 ..Default::default()
             };
 

crates/core/database/src/models/channels/model.rs

@@ -1,12 +1,14 @@
 use std::collections::HashMap;
 
+use revolt_models::v0::MessageAuthor;
 use revolt_permissions::OverrideField;
 use revolt_result::Result;
 use serde::{Deserialize, Serialize};
 
-use crate::{events::client::EventV1, Database, File, IntoDocumentPath};
+use crate::{events::client::EventV1, Database, File, IntoDocumentPath, SystemMessage, User};
 
 auto_derived!(
+    #[serde(tag = "channel_type")]
     pub enum Channel {
         /// Personal "Saved Notes" channel which allows users to save messages
         SavedMessages {
@@ -164,11 +166,25 @@ auto_derived!(
     }
 );
 
+#[allow(clippy::disallowed_methods)]
 impl Channel {
     /// Create a channel
     pub async fn create(&self, db: &Database) -> Result<()> {
         db.insert_channel(self).await?;
 
+        let event = EventV1::ChannelCreate(self.clone().into());
+        match self {
+            Self::SavedMessages { user, .. } => event.private(user.clone()).await,
+            Self::DirectMessage { recipients, .. } | Self::Group { recipients, .. } => {
+                for recipient in recipients {
+                    event.clone().private(recipient.clone()).await;
+                }
+            }
+            Self::TextChannel { server, .. } | Self::VoiceChannel { server, .. } => {
+                event.p(server.clone()).await;
+            }
+        }
+
         Ok(())
     }
 
@@ -176,40 +192,48 @@ impl Channel {
     pub async fn add_user_to_group(
         &mut self,
         db: &Database,
-        user_id: &str,
+        user: &User,
-        _by_id: &str,
+        by_id: &str,
     ) -> Result<()> {
         if let Channel::Group { recipients, .. } = self {
-            if recipients.contains(&String::from(user_id)) {
+            if recipients.contains(&String::from(&user.id)) {
                 return Err(create_error!(AlreadyInGroup));
             }
 
-            recipients.push(String::from(user_id));
+            recipients.push(String::from(&user.id));
         }
 
         match &self {
             Channel::Group { id, .. } => {
-                db.add_user_to_group(id, user_id).await?;
+                db.add_user_to_group(id, &user.id).await?;
 
                 EventV1::ChannelGroupJoin {
                     id: id.to_string(),
-                    user: user_id.to_string(),
+                    user: user.id.to_string(),
                 }
                 .p(id.to_string())
                 .await;
 
                 EventV1::ChannelCreate(self.clone().into())
-                    .private(user_id.to_string())
+                    .private(user.id.to_string())
                     .await;
 
-                /* TODO: SystemMessage::UserAdded {
+                SystemMessage::UserAdded {
-                    id: user.to_string(),
+                    id: user.id.to_string(),
-                    by: by.to_string(),
+                    by: by_id.to_string(),
                 }
                 .into_message(id.to_string())
-                .create(db, self, None)
+                .send(
+                    db,
+                    MessageAuthor::System {
+                        username: &user.username,
+                        avatar: user.avatar.as_ref().map(|file| file.id.as_ref()),
+                    },
+                    self,
+                    false,
+                )
                 .await
-                .ok(); */
+                .ok();
 
                 Ok(())
             }
@@ -293,7 +317,7 @@ impl Channel {
     }
 
     /// Update channel data
-    pub async fn update<'a>(
+    pub async fn update(
         &mut self,
         db: &Database,
         partial: PartialChannel,
@@ -305,8 +329,19 @@ impl Channel {
 
         self.apply_options(partial.clone());
 
-        db.update_channel(&self.id(), &partial, remove.clone())
+        let id = self.id().to_string();
-            .await?;
+        db.update_channel(&id, &partial, remove.clone()).await?;
+
+        EventV1::ChannelUpdate {
+            id: id.clone(),
+            data: partial.into(),
+            clear: remove.into_iter().map(|v| v.into()).collect(),
+        }
+        .p(match self {
+            Self::TextChannel { server, .. } | Self::VoiceChannel { server, .. } => server.clone(),
+            _ => id,
+        })
+        .await;
 
         Ok(())
     }
@@ -444,19 +479,20 @@ impl Channel {
     pub async fn remove_user_from_group(
         &self,
         db: &Database,
-        user_id: &str,
+        user: &User,
-        _by_id: Option<&str>,
+        by_id: Option<&str>,
         silent: bool,
     ) -> Result<()> {
         match &self {
             Channel::Group {
                 id,
+                name,
                 owner,
                 recipients,
                 ..
             } => {
-                if user_id == owner {
+                if &user.id == owner {
-                    if let Some(new_owner) = recipients.iter().find(|x| *x != user_id) {
+                    if let Some(new_owner) = recipients.iter().find(|x| *x != &user.id) {
                         db.update_channel(
                             id,
                             &PartialChannel {
@@ -467,14 +503,22 @@ impl Channel {
                         )
                         .await?;
 
-                        /* TODO: SystemMessage::ChannelOwnershipChanged {
+                        SystemMessage::ChannelOwnershipChanged {
                             from: owner.to_string(),
-                            to: new_owner.into(),
+                            to: new_owner.to_string(),
                         }
                         .into_message(id.to_string())
-                        .create(db, self, None)
+                        .send(
+                            db,
+                            MessageAuthor::System {
+                                username: name,
+                                avatar: None,
+                            },
+                            self,
+                            false,
+                        )
                         .await
-                        .ok(); */
+                        .ok();
                     } else {
                         db.delete_channel(self).await?;
                         return Ok(());
@@ -483,26 +527,34 @@ impl Channel {
 
                 EventV1::ChannelGroupLeave {
                     id: id.to_string(),
-                    user: user_id.to_string(),
+                    user: user.id.to_string(),
                 }
                 .p(id.to_string())
                 .await;
 
                 if !silent {
-                    /* TODO: if let Some(_by) = by_id {
+                    if let Some(by) = by_id {
                         SystemMessage::UserRemove {
-                            id: user_id.to_string(),
+                            id: user.id.to_string(),
                             by: by.to_string(),
                         }
                     } else {
                         SystemMessage::UserLeft {
-                            id: user_id.to_string(),
+                            id: user.id.to_string(),
                         }
                     }
                     .into_message(id.to_string())
-                    .create(db, self, None)
+                    .send(
+                        db,
+                        MessageAuthor::System {
+                            username: &user.username,
+                            avatar: user.avatar.as_ref().map(|file| file.id.as_ref()),
+                        },
+                        self,
+                        false,
+                    )
                     .await
-                    .ok(); */
+                    .ok();
                 }
 
                 Ok(())
@@ -514,6 +566,8 @@ impl Channel {
 
     /// Delete a channel
     pub async fn delete(&self, db: &Database) -> Result<()> {
+        let id = self.id().to_string();
+        EventV1::ChannelDelete { id: id.clone() }.p(id).await;
         db.delete_channel(self).await
     }
 }

crates/core/database/src/models/emojis/mod.rs

@@ -0,0 +1,5 @@
+mod model;
+mod ops;
+
+pub use model::*;
+pub use ops::*;

crates/core/database/src/models/emojis/model.rs

@@ -0,0 +1,87 @@
+use std::collections::HashSet;
+use std::str::FromStr;
+
+use once_cell::sync::Lazy;
+use revolt_result::Result;
+use ulid::Ulid;
+
+use crate::events::client::EventV1;
+use crate::Database;
+
+static PERMISSIBLE_EMOJIS: Lazy<HashSet<String>> = Lazy::new(|| {
+    include_str!("unicode_emoji.txt")
+        .split('\n')
+        .map(|x| x.into())
+        .collect()
+});
+
+auto_derived!(
+    /// Emoji
+    pub struct Emoji {
+        /// Unique Id
+        #[serde(rename = "_id")]
+        pub id: String,
+        /// What owns this emoji
+        pub parent: EmojiParent,
+        /// Uploader user id
+        pub creator_id: String,
+        /// Emoji name
+        pub name: String,
+        /// Whether the emoji is animated
+        #[serde(skip_serializing_if = "crate::if_false", default)]
+        pub animated: bool,
+        /// Whether the emoji is marked as nsfw
+        #[serde(skip_serializing_if = "crate::if_false", default)]
+        pub nsfw: bool,
+    }
+
+    /// Parent Id of the emoji
+    #[serde(tag = "type")]
+    pub enum EmojiParent {
+        Server { id: String },
+        Detached,
+    }
+);
+
+#[allow(clippy::disallowed_methods)]
+impl Emoji {
+    /// Get parent id
+    fn parent(&self) -> &str {
+        match &self.parent {
+            EmojiParent::Server { id } => id,
+            EmojiParent::Detached => "",
+        }
+    }
+
+    /// Create an emoji
+    pub async fn create(&self, db: &Database) -> Result<()> {
+        db.insert_emoji(self).await?;
+
+        EventV1::EmojiCreate(self.clone().into())
+            .p(self.parent().to_string())
+            .await;
+
+        Ok(())
+    }
+
+    /// Delete an emoji
+    pub async fn delete(self, db: &Database) -> Result<()> {
+        EventV1::EmojiDelete {
+            id: self.id.to_string(),
+        }
+        .p(self.parent().to_string())
+        .await;
+
+        db.detach_emoji(&self).await
+    }
+
+    /// Check whether we can use a given emoji
+    pub async fn can_use(db: &Database, emoji: &str) -> Result<bool> {
+        if Ulid::from_str(emoji).is_ok() {
+            db.fetch_emoji(emoji).await?;
+            Ok(true)
+        } else {
+            Ok(PERMISSIBLE_EMOJIS.contains(emoji))
+        }
+    }
+}

crates/core/database/src/models/emojis/ops.rs

@@ -0,0 +1,24 @@
+use revolt_result::Result;
+
+use crate::Emoji;
+
+mod mongodb;
+mod reference;
+
+#[async_trait]
+pub trait AbstractEmojis: Sync + Send {
+    /// Insert emoji into database.
+    async fn insert_emoji(&self, emoji: &Emoji) -> Result<()>;
+
+    /// Fetch an emoji by its id
+    async fn fetch_emoji(&self, id: &str) -> Result<Emoji>;
+
+    /// Fetch emoji by their parent id
+    async fn fetch_emoji_by_parent_id(&self, parent_id: &str) -> Result<Vec<Emoji>>;
+
+    /// Fetch emoji by their parent ids
+    async fn fetch_emoji_by_parent_ids(&self, parent_ids: &[String]) -> Result<Vec<Emoji>>;
+
+    /// Detach an emoji by its id
+    async fn detach_emoji(&self, emoji: &Emoji) -> Result<()>;
+}

crates/core/database/src/models/emojis/ops/mongodb.rs

@@ -0,0 +1,70 @@
+use bson::Document;
+use revolt_result::Result;
+
+use crate::Emoji;
+use crate::MongoDb;
+
+use super::AbstractEmojis;
+
+static COL: &str = "emojis";
+
+#[async_trait]
+impl AbstractEmojis for MongoDb {
+    /// Insert emoji into database.
+    async fn insert_emoji(&self, emoji: &Emoji) -> Result<()> {
+        query!(self, insert_one, COL, &emoji).map(|_| ())
+    }
+
+    /// Fetch an emoji by its id
+    async fn fetch_emoji(&self, id: &str) -> Result<Emoji> {
+        query!(self, find_one_by_id, COL, id)?.ok_or_else(|| create_error!(NotFound))
+    }
+
+    /// Fetch emoji by their parent id
+    async fn fetch_emoji_by_parent_id(&self, parent_id: &str) -> Result<Vec<Emoji>> {
+        query!(
+            self,
+            find_one,
+            COL,
+            doc! {
+                "parent.id": parent_id
+            }
+        )?
+        .ok_or_else(|| create_error!(NotFound))
+    }
+
+    /// Fetch emoji by their parent ids
+    async fn fetch_emoji_by_parent_ids(&self, parent_ids: &[String]) -> Result<Vec<Emoji>> {
+        query!(
+            self,
+            find,
+            COL,
+            doc! {
+                "parent.id": {
+                    "$in": parent_ids
+                }
+            }
+        )
+    }
+
+    /// Detach an emoji by its id
+    async fn detach_emoji(&self, emoji: &Emoji) -> Result<()> {
+        self.col::<Document>(COL)
+            .update_one(
+                doc! {
+                    "_id": &emoji.id
+                },
+                doc! {
+                    "$set": {
+                        "parent": {
+                            "type": "Detached"
+                        }
+                    }
+                },
+                None,
+            )
+            .await
+            .map(|_| ())
+            .map_err(|_| create_database_error!("update_one", COL))
+    }
+}

crates/core/database/src/models/emojis/ops/reference.rs

@@ -0,0 +1,67 @@
+use revolt_result::Result;
+
+use crate::Emoji;
+use crate::EmojiParent;
+use crate::ReferenceDb;
+
+use super::AbstractEmojis;
+
+#[async_trait]
+impl AbstractEmojis for ReferenceDb {
+    /// Insert emoji into database.
+    async fn insert_emoji(&self, emoji: &Emoji) -> Result<()> {
+        let mut emojis = self.emojis.lock().await;
+        if emojis.contains_key(&emoji.id) {
+            Err(create_database_error!("insert", "emoji"))
+        } else {
+            emojis.insert(emoji.id.to_string(), emoji.clone());
+            Ok(())
+        }
+    }
+
+    /// Fetch an emoji by its id
+    async fn fetch_emoji(&self, id: &str) -> Result<Emoji> {
+        let emojis = self.emojis.lock().await;
+        emojis
+            .get(id)
+            .cloned()
+            .ok_or_else(|| create_error!(NotFound))
+    }
+
+    /// Fetch emoji by their parent id
+    async fn fetch_emoji_by_parent_id(&self, parent_id: &str) -> Result<Vec<Emoji>> {
+        let emojis = self.emojis.lock().await;
+        Ok(emojis
+            .values()
+            .filter(|emoji| match &emoji.parent {
+                EmojiParent::Server { id } => id == parent_id,
+                _ => false,
+            })
+            .cloned()
+            .collect())
+    }
+
+    /// Fetch emoji by their parent ids
+    async fn fetch_emoji_by_parent_ids(&self, parent_ids: &[String]) -> Result<Vec<Emoji>> {
+        let emojis = self.emojis.lock().await;
+        Ok(emojis
+            .values()
+            .filter(|emoji| match &emoji.parent {
+                EmojiParent::Server { id } => parent_ids.contains(id),
+                _ => false,
+            })
+            .cloned()
+            .collect())
+    }
+
+    /// Detach an emoji by its id
+    async fn detach_emoji(&self, emoji: &Emoji) -> Result<()> {
+        let mut emojis = self.emojis.lock().await;
+        if let Some(bot) = emojis.get_mut(&emoji.id) {
+            bot.parent = EmojiParent::Detached;
+            Ok(())
+        } else {
+            Err(create_error!(NotFound))
+        }
+    }
+}

crates/core/database/src/models/messages/mod.rs

@@ -0,0 +1,5 @@
+mod model;
+mod ops;
+
+pub use model::*;
+pub use ops::*;

crates/core/database/src/models/messages/model.rs

@@ -0,0 +1,572 @@
+use std::collections::HashSet;
+
+use indexmap::{IndexMap, IndexSet};
+use iso8601_timestamp::Timestamp;
+use revolt_config::config;
+use revolt_models::v0::{
+    self, DataMessageSend, Embed, MessageAuthor, MessageSort, MessageWebhook, PushNotification,
+    ReplyIntent, SendableEmbed, RE_MENTION,
+};
+use revolt_permissions::{ChannelPermission, PermissionValue};
+use revolt_result::Result;
+use ulid::Ulid;
+
+use crate::{
+    events::client::EventV1,
+    tasks::{self, ack::AckEvent},
+    util::idempotency::IdempotencyKey,
+    Channel, Database, Emoji, File,
+};
+
+auto_derived_partial!(
+    /// Message
+    pub struct Message {
+        /// Unique Id
+        #[serde(rename = "_id")]
+        pub id: String,
+        /// Unique value generated by client sending this message
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub nonce: Option<String>,
+        /// Id of the channel this message was sent in
+        pub channel: String,
+        /// Id of the user or webhook that sent this message
+        pub author: String,
+        /// The webhook that sent this message
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub webhook: Option<MessageWebhook>,
+        /// Message content
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub content: Option<String>,
+        /// System message
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub system: Option<SystemMessage>,
+        /// Array of attachments
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub attachments: Option<Vec<File>>,
+        /// Time at which this message was last edited
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub edited: Option<Timestamp>,
+        /// Attached embeds to this message
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub embeds: Option<Vec<Embed>>,
+        /// Array of user ids mentioned in this message
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub mentions: Option<Vec<String>>,
+        /// Array of message ids this message is replying to
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub replies: Option<Vec<String>>,
+        /// Hashmap of emoji IDs to array of user IDs
+        #[serde(skip_serializing_if = "IndexMap::is_empty", default)]
+        pub reactions: IndexMap<String, IndexSet<String>>,
+        /// Information about how this message should be interacted with
+        #[serde(skip_serializing_if = "Interactions::is_default", default)]
+        pub interactions: Interactions,
+        /// Name and / or avatar overrides for this message
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub masquerade: Option<Masquerade>,
+    },
+    "PartialMessage"
+);
+
+auto_derived!(
+    /// System Event
+    #[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 },
+        #[serde(rename = "channel_ownership_changed")]
+        ChannelOwnershipChanged { from: String, to: String },
+    }
+
+    /// Name and / or avatar override information
+    pub struct Masquerade {
+        /// Replace the display name shown on this message
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub name: Option<String>,
+        /// Replace the avatar shown on this message (URL to image file)
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub avatar: Option<String>,
+        /// Replace the display role colour shown on this message
+        ///
+        /// Must have `ManageRole` permission to use
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub colour: Option<String>,
+    }
+
+    /// Information to guide interactions on this message
+    #[derive(Default)]
+    pub struct Interactions {
+        /// Reactions which should always appear and be distinct
+        #[serde(skip_serializing_if = "Option::is_none", default)]
+        pub reactions: Option<IndexSet<String>>,
+        /// Whether reactions should be restricted to the given list
+        ///
+        /// Can only be set to true if reactions list is of at least length 1
+        #[serde(skip_serializing_if = "crate::if_false", default)]
+        pub restrict_reactions: bool,
+    }
+
+    /// Appended Information
+    pub struct AppendMessage {
+        /// Additional embeds to include in this message
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub embeds: Option<Vec<Embed>>,
+    }
+
+    /// Message Time Period
+    ///
+    /// Filter and sort messages by time
+    #[serde(untagged)]
+    pub enum MessageTimePeriod {
+        Relative {
+            /// Message id to search around
+            ///
+            /// Specifying 'nearby' ignores 'before', 'after' and 'sort'.
+            /// It will also take half of limit rounded as the limits to each side.
+            /// It also fetches the message ID specified.
+            nearby: String,
+        },
+        Absolute {
+            /// Message id before which messages should be fetched
+            before: Option<String>,
+            /// Message id after which messages should be fetched
+            after: Option<String>,
+            /// Message sort direction
+            sort: Option<MessageSort>,
+        },
+    }
+
+    /// Message Filter
+    pub struct MessageFilter {
+        /// Parent channel ID
+        pub channel: Option<String>,
+        /// Message author ID
+        pub author: Option<String>,
+        /// Search query
+        pub query: Option<String>,
+    }
+
+    /// Message Query
+    pub struct MessageQuery {
+        /// Maximum number of messages to fetch
+        ///
+        /// For fetching nearby messages, this is \`(limit + 1)\`.
+        pub limit: Option<i64>,
+        /// Filter to apply
+        #[serde(flatten)]
+        pub filter: MessageFilter,
+        /// Time period to fetch
+        #[serde(flatten)]
+        pub time_period: MessageTimePeriod,
+    }
+);
+
+#[allow(clippy::derivable_impls)]
+impl Default for Message {
+    fn default() -> Self {
+        Self {
+            id: Default::default(),
+            nonce: None,
+            channel: Default::default(),
+            author: Default::default(),
+            webhook: None,
+            content: None,
+            system: None,
+            attachments: None,
+            edited: None,
+            embeds: None,
+            mentions: None,
+            replies: None,
+            reactions: Default::default(),
+            interactions: Default::default(),
+            masquerade: None,
+        }
+    }
+}
+
+#[allow(clippy::disallowed_methods)]
+impl Message {
+    /// Create message from API data
+    pub async fn create_from_api(
+        db: &Database,
+        channel: Channel,
+        data: DataMessageSend,
+        author: MessageAuthor<'_>,
+        mut idempotency: IdempotencyKey,
+        generate_embeds: bool,
+    ) -> Result<Message> {
+        let config = config().await;
+
+        Message::validate_sum(
+            &data.content,
+            data.embeds.as_deref().unwrap_or_default(),
+            config.features.limits.default.message_length,
+        )?;
+
+        idempotency
+            .consume_nonce(data.nonce)
+            .await
+            .map_err(|_| create_error!(InvalidOperation))?;
+
+        // Check the message is not empty
+        if (data.content.as_ref().map_or(true, |v| v.is_empty()))
+            && (data.attachments.as_ref().map_or(true, |v| v.is_empty()))
+            && (data.embeds.as_ref().map_or(true, |v| v.is_empty()))
+        {
+            return Err(create_error!(EmptyMessage));
+        }
+
+        // Ensure restrict_reactions is not specified without reactions list
+        if let Some(interactions) = &data.interactions {
+            if interactions.restrict_reactions {
+                let disallowed = if let Some(list) = &interactions.reactions {
+                    list.is_empty()
+                } else {
+                    true
+                };
+
+                if disallowed {
+                    return Err(create_error!(InvalidProperty));
+                }
+            }
+        }
+
+        let (author_id, webhook) = match &author {
+            MessageAuthor::User(user) => (user.id.clone(), None),
+            MessageAuthor::Webhook(webhook) => (webhook.id.clone(), Some((*webhook).clone())),
+            MessageAuthor::System { .. } => ("00000000000000000000000000".to_string(), None),
+        };
+
+        // Start constructing the message
+        let message_id = Ulid::new().to_string();
+        let mut message = Message {
+            id: message_id.clone(),
+            channel: channel.id(),
+            masquerade: data.masquerade.map(|masquerade| masquerade.into()),
+            interactions: data
+                .interactions
+                .map(|interactions| interactions.into())
+                .unwrap_or_default(),
+            author: author_id,
+            webhook: webhook.map(|w| w.into()),
+            ..Default::default()
+        };
+
+        // Parse mentions in message.
+        let mut mentions = HashSet::new();
+        if let Some(content) = &data.content {
+            for capture in RE_MENTION.captures_iter(content) {
+                if let Some(mention) = capture.get(1) {
+                    mentions.insert(mention.as_str().to_string());
+                }
+            }
+        }
+
+        // Verify replies are valid.
+        let mut replies = HashSet::new();
+        if let Some(entries) = data.replies {
+            if entries.len() > config.features.limits.default.message_replies {
+                return Err(create_error!(TooManyReplies {
+                    max: config.features.limits.default.message_replies,
+                }));
+            }
+
+            for ReplyIntent { id, mention } in entries {
+                let message = db.fetch_message(&id).await?;
+
+                if mention {
+                    mentions.insert(message.author.to_owned());
+                }
+
+                replies.insert(message.id);
+            }
+        }
+
+        if !mentions.is_empty() {
+            message.mentions.replace(mentions.into_iter().collect());
+        }
+
+        if !replies.is_empty() {
+            message
+                .replies
+                .replace(replies.into_iter().collect::<Vec<String>>());
+        }
+
+        // Add attachments to message.
+        let mut attachments = vec![];
+        if data
+            .attachments
+            .as_ref()
+            .is_some_and(|v| v.len() > config.features.limits.default.message_attachments)
+        {
+            return Err(create_error!(TooManyAttachments {
+                max: config.features.limits.default.message_attachments,
+            }));
+        }
+
+        if data
+            .embeds
+            .as_ref()
+            .is_some_and(|v| v.len() > config.features.limits.default.message_embeds)
+        {
+            return Err(create_error!(TooManyEmbeds {
+                max: config.features.limits.default.message_embeds,
+            }));
+        }
+
+        for attachment_id in data.attachments.as_deref().unwrap_or_default() {
+            attachments.push(
+                db.find_and_use_attachment(attachment_id, "attachments", "message", &message_id)
+                    .await?,
+            );
+        }
+
+        if !attachments.is_empty() {
+            message.attachments.replace(attachments);
+        }
+
+        // Process included embeds.
+        for sendable_embed in data.embeds.unwrap_or_default() {
+            message.attach_sendable_embed(db, sendable_embed).await?;
+        }
+
+        // Set content
+        message.content = data.content;
+
+        // Pass-through nonce value for clients
+        message.nonce = Some(idempotency.into_key());
+
+        // Send the message
+        message.send(db, author, &channel, generate_embeds).await?;
+
+        Ok(message)
+    }
+
+    /// Send a message without any notifications
+    pub async fn send_without_notifications(
+        &mut self,
+        db: &Database,
+        is_dm: bool,
+        generate_embeds: bool,
+    ) -> Result<()> {
+        db.insert_message(self).await?;
+
+        // Fan out events
+        EventV1::Message(self.clone().into())
+            .p(self.channel.to_string())
+            .await;
+
+        // Update last_message_id
+        tasks::last_message_id::queue(self.channel.to_string(), self.id.to_string(), is_dm).await;
+
+        // Add mentions for affected users
+        if let Some(mentions) = &self.mentions {
+            for user in mentions {
+                tasks::ack::queue(
+                    self.channel.to_string(),
+                    user.to_string(),
+                    AckEvent::AddMention {
+                        ids: vec![self.id.to_string()],
+                    },
+                )
+                .await;
+            }
+        }
+
+        // Generate embeds
+        if generate_embeds {
+            if let Some(content) = &self.content {
+                tasks::process_embeds::queue(
+                    self.channel.to_string(),
+                    self.id.to_string(),
+                    content.clone(),
+                )
+                .await;
+            }
+        }
+
+        Ok(())
+    }
+
+    /// Send a message
+    pub async fn send(
+        &mut self,
+        db: &Database,
+        author: MessageAuthor<'_>,
+        channel: &Channel,
+        generate_embeds: bool,
+    ) -> Result<()> {
+        self.send_without_notifications(
+            db,
+            matches!(channel, Channel::DirectMessage { .. }),
+            generate_embeds,
+        )
+        .await?;
+
+        // Push out Web Push notifications
+        crate::tasks::web_push::queue(
+            {
+                match channel {
+                    Channel::DirectMessage { recipients, .. }
+                    | Channel::Group { recipients, .. } => recipients.clone(),
+                    Channel::TextChannel { .. } => self.mentions.clone().unwrap_or_default(),
+                    _ => vec![],
+                }
+            },
+            PushNotification::from(self.clone().into(), Some(author), &channel.id()).await,
+        )
+        .await;
+
+        Ok(())
+    }
+
+    /// Append content to message
+    pub async fn append(
+        db: &Database,
+        id: String,
+        channel: String,
+        append: AppendMessage,
+    ) -> Result<()> {
+        db.append_message(&id, &append).await?;
+
+        EventV1::MessageAppend {
+            id,
+            channel: channel.to_string(),
+            append: append.into(),
+        }
+        .p(channel)
+        .await;
+
+        Ok(())
+    }
+
+    /// Convert sendable embed to text embed and attach to message
+    pub async fn attach_sendable_embed(
+        &mut self,
+        db: &Database,
+        embed: v0::SendableEmbed,
+    ) -> Result<()> {
+        let media: Option<v0::File> = if let Some(id) = embed.media {
+            Some(
+                db.find_and_use_attachment(&id, "attachments", "message", &self.id)
+                    .await?
+                    .into(),
+            )
+        } else {
+            None
+        };
+
+        let embed = v0::Embed::Text(v0::Text {
+            icon_url: embed.icon_url,
+            url: embed.url,
+            title: embed.title,
+            description: embed.description,
+            media,
+            colour: embed.colour,
+        });
+
+        if let Some(embeds) = &mut self.embeds {
+            embeds.push(embed);
+        } else {
+            self.embeds = Some(vec![embed]);
+        }
+
+        Ok(())
+    }
+
+    /// Validate the sum of content of a message is under threshold
+    pub fn validate_sum(
+        content: &Option<String>,
+        embeds: &[SendableEmbed],
+        max_length: usize,
+    ) -> Result<()> {
+        let mut running_total = 0;
+        if let Some(content) = content {
+            running_total += content.len();
+        }
+
+        for embed in embeds {
+            if let Some(desc) = &embed.description {
+                running_total += desc.len();
+            }
+        }
+
+        if running_total <= max_length {
+            Ok(())
+        } else {
+            Err(create_error!(PayloadTooLarge))
+        }
+    }
+}
+
+impl SystemMessage {
+    pub fn into_message(self, channel: String) -> Message {
+        Message {
+            id: Ulid::new().to_string(),
+            channel,
+            author: "00000000000000000000000000".to_string(),
+            system: Some(self),
+
+            ..Default::default()
+        }
+    }
+}
+
+impl Interactions {
+    /// Validate interactions info is correct
+    pub async fn validate(&self, db: &Database, permissions: &PermissionValue) -> Result<()> {
+        let config = config().await;
+
+        if let Some(reactions) = &self.reactions {
+            permissions.throw_if_lacking_channel_permission(ChannelPermission::React)?;
+
+            if reactions.len() > config.features.limits.default.message_reactions {
+                return Err(create_error!(InvalidOperation));
+            }
+
+            for reaction in reactions {
+                if !Emoji::can_use(db, reaction).await? {
+                    return Err(create_error!(InvalidOperation));
+                }
+            }
+        }
+
+        Ok(())
+    }
+
+    /// Check if we can use a given emoji to react
+    pub fn can_use(&self, emoji: &str) -> bool {
+        if self.restrict_reactions {
+            if let Some(reactions) = &self.reactions {
+                reactions.contains(emoji)
+            } else {
+                false
+            }
+        } else {
+            true
+        }
+    }
+
+    /// Check if default initialisation of fields
+    pub fn is_default(&self) -> bool {
+        !self.restrict_reactions && self.reactions.is_none()
+    }
+}

crates/core/database/src/models/messages/ops.rs

@@ -0,0 +1,39 @@
+use revolt_result::Result;
+
+use crate::{AppendMessage, Message, MessageQuery, PartialMessage};
+
+mod mongodb;
+mod reference;
+
+#[async_trait]
+pub trait AbstractMessages: Sync + Send {
+    /// Insert a new message into the database
+    async fn insert_message(&self, message: &Message) -> Result<()>;
+
+    /// Fetch a message by its id
+    async fn fetch_message(&self, id: &str) -> Result<Message>;
+
+    /// Fetch multiple messages by given query
+    async fn fetch_messages(&self, query: MessageQuery) -> Result<Vec<Message>>;
+
+    /// Update a given message with new information
+    async fn update_message(&self, id: &str, message: &PartialMessage) -> Result<()>;
+
+    /// Append information to a given message
+    async fn append_message(&self, id: &str, append: &AppendMessage) -> Result<()>;
+
+    /// Add a new reaction to a message
+    async fn add_reaction(&self, id: &str, emoji: &str, user: &str) -> Result<()>;
+
+    /// Remove a reaction from a message
+    async fn remove_reaction(&self, id: &str, emoji: &str, user: &str) -> Result<()>;
+
+    /// Remove reaction from a message
+    async fn clear_reaction(&self, id: &str, emoji: &str) -> Result<()>;
+
+    /// Delete a message from the database by its id
+    async fn delete_message(&self, id: &str) -> Result<()>;
+
+    /// Delete messages from a channel by their ids and corresponding channel id
+    async fn delete_messages(&self, channel: &str, ids: &[String]) -> Result<()>;
+}

crates/core/database/src/models/messages/ops/mongodb.rs

@@ -0,0 +1,280 @@
+use bson::{to_bson, Document};
+use futures::try_join;
+use mongodb::options::FindOptions;
+use revolt_models::v0::MessageSort;
+use revolt_result::Result;
+
+use crate::{AppendMessage, Message, MessageQuery, MessageTimePeriod, MongoDb, PartialMessage};
+
+use super::AbstractMessages;
+
+static COL: &str = "messages";
+
+#[async_trait]
+impl AbstractMessages for MongoDb {
+    /// Insert a new message into the database
+    async fn insert_message(&self, message: &Message) -> Result<()> {
+        query!(self, insert_one, COL, &message).map(|_| ())
+    }
+
+    /// Fetch a message by its id
+    async fn fetch_message(&self, id: &str) -> Result<Message> {
+        query!(self, find_one_by_id, COL, id)?.ok_or_else(|| create_error!(NotFound))
+    }
+
+    /// Fetch multiple messages by given query
+    async fn fetch_messages(&self, query: MessageQuery) -> Result<Vec<Message>> {
+        let mut filter = doc! {};
+
+        // 1. Apply message filters
+        if let Some(channel) = query.filter.channel {
+            filter.insert("channel", channel);
+        }
+
+        if let Some(author) = query.filter.author {
+            filter.insert("author", author);
+        }
+
+        let is_search_query = if let Some(query) = query.filter.query {
+            filter.insert(
+                "$text",
+                doc! {
+                    "$search": query
+                },
+            );
+
+            true
+        } else {
+            false
+        };
+
+        // 2. Find query limit
+        let limit = query.limit.unwrap_or(50);
+
+        // 3. Apply message time period
+        match query.time_period {
+            MessageTimePeriod::Relative { nearby } => {
+                // 3.1. Prepare filters
+                let mut older_message_filter = filter.clone();
+                let mut newer_message_filter = filter;
+
+                older_message_filter.insert(
+                    "_id",
+                    doc! {
+                        "$lt": &nearby
+                    },
+                );
+
+                newer_message_filter.insert(
+                    "_id",
+                    doc! {
+                        "$gte": &nearby
+                    },
+                );
+
+                // 3.2. Execute in both directions
+                let (a, b) = try_join!(
+                    self.find_with_options::<_, Message>(
+                        COL,
+                        newer_message_filter,
+                        FindOptions::builder()
+                            .limit(limit / 2 + 1)
+                            .sort(doc! {
+                                "_id": 1_i32
+                            })
+                            .build(),
+                    ),
+                    self.find_with_options::<_, Message>(
+                        COL,
+                        older_message_filter,
+                        FindOptions::builder()
+                            .limit(limit / 2)
+                            .sort(doc! {
+                                "_id": -1_i32
+                            })
+                            .build(),
+                    )
+                )
+                .map_err(|_| create_database_error!("find", COL))?;
+
+                Ok([a, b].concat())
+            }
+            MessageTimePeriod::Absolute {
+                before,
+                after,
+                sort,
+            } => {
+                // 3.1. Apply message ID filter
+                if let Some(doc) = match (before, after) {
+                    (Some(before), Some(after)) => Some(doc! {
+                        "$lt": before,
+                        "$gt": after
+                    }),
+                    (Some(before), _) => Some(doc! {
+                        "$lt": before
+                    }),
+                    (_, Some(after)) => Some(doc! {
+                        "$gt": after
+                    }),
+                    _ => None,
+                } {
+                    filter.insert("_id", doc);
+                }
+
+                // 3.2. Execute with given message sort
+                self.find_with_options(
+                    COL,
+                    filter,
+                    FindOptions::builder()
+                        .limit(limit)
+                        .sort(match sort.unwrap_or(MessageSort::Latest) {
+                            // Sort by relevance, fallback to latest
+                            MessageSort::Relevance => {
+                                if is_search_query {
+                                    doc! {
+                                        "score": {
+                                            "$meta": "textScore"
+                                        }
+                                    }
+                                } else {
+                                    doc! {
+                                        "_id": -1_i32
+                                    }
+                                }
+                            }
+                            // Sort by latest first
+                            MessageSort::Latest => doc! {
+                                "_id": -1_i32
+                            },
+                            // Sort by oldest first
+                            MessageSort::Oldest => doc! {
+                                "_id": 1_i32
+                            },
+                        })
+                        .build(),
+                )
+                .await
+                .map_err(|_| create_database_error!("find", COL))
+            }
+        }
+    }
+
+    /// Update a given message with new information
+    async fn update_message(&self, id: &str, message: &PartialMessage) -> Result<()> {
+        query!(self, update_one_by_id, COL, id, message, vec![], None).map(|_| ())
+    }
+
+    /// Append information to a given message
+    async fn append_message(&self, id: &str, append: &AppendMessage) -> Result<()> {
+        let mut query = doc! {};
+
+        if let Some(embeds) = &append.embeds {
+            if !embeds.is_empty() {
+                query.insert(
+                    "$push",
+                    doc! {
+                        "embeds": {
+                            "$each": to_bson(embeds)
+                                .map_err(|_| create_database_error!("to_bson", "embeds"))?
+                        }
+                    },
+                );
+            }
+        }
+
+        if query.is_empty() {
+            return Ok(());
+        }
+
+        self.col::<Document>(COL)
+            .update_one(
+                doc! {
+                    "_id": id
+                },
+                query,
+                None,
+            )
+            .await
+            .map(|_| ())
+            .map_err(|_| create_database_error!("update_one", COL))
+    }
+
+    /// Add a new reaction to a message
+    async fn add_reaction(&self, id: &str, emoji: &str, user: &str) -> Result<()> {
+        self.col::<Document>(COL)
+            .update_one(
+                doc! {
+                    "_id": id
+                },
+                doc! {
+                    "$addToSet": {
+                        format!("reactions.{emoji}"): user
+                    }
+                },
+                None,
+            )
+            .await
+            .map(|_| ())
+            .map_err(|_| create_database_error!("update_one", COL))
+    }
+
+    /// Remove a reaction from a message
+    async fn remove_reaction(&self, id: &str, emoji: &str, user: &str) -> Result<()> {
+        self.col::<Document>(COL)
+            .update_one(
+                doc! {
+                    "_id": id
+                },
+                doc! {
+                    "$pull": {
+                        format!("reactions.{emoji}"): user
+                    }
+                },
+                None,
+            )
+            .await
+            .map(|_| ())
+            .map_err(|_| create_database_error!("update_one", COL))
+    }
+
+    /// Remove reaction from a message
+    async fn clear_reaction(&self, id: &str, emoji: &str) -> Result<()> {
+        self.col::<Document>(COL)
+            .update_one(
+                doc! {
+                    "_id": id
+                },
+                doc! {
+                    "$unset": {
+                        format!("reactions.{emoji}"): 1
+                    }
+                },
+                None,
+            )
+            .await
+            .map(|_| ())
+            .map_err(|_| create_database_error!("update_one", COL))
+    }
+
+    /// Delete a message from the database by its id
+    async fn delete_message(&self, id: &str) -> Result<()> {
+        query!(self, delete_one_by_id, COL, id).map(|_| ())
+    }
+
+    /// Delete messages from a channel by their ids and corresponding channel id
+    async fn delete_messages(&self, channel: &str, ids: &[String]) -> Result<()> {
+        self.col::<Document>(COL)
+            .delete_many(
+                doc! {
+                    "channel": channel,
+                    "_id": {
+                        "$in": ids
+                    }
+                },
+                None,
+            )
+            .await
+            .map(|_| ())
+            .map_err(|_| create_database_error!("delete_many", COL))
+    }
+}

crates/core/database/src/models/messages/ops/reference.rs

@@ -0,0 +1,272 @@
+use indexmap::IndexSet;
+use revolt_result::Result;
+
+use crate::{AppendMessage, Message, MessageQuery, PartialMessage, ReferenceDb};
+
+use super::AbstractMessages;
+
+#[async_trait]
+impl AbstractMessages for ReferenceDb {
+    /// Insert a new message into the database
+    async fn insert_message(&self, message: &Message) -> Result<()> {
+        let mut messages = self.messages.lock().await;
+        if messages.contains_key(&message.id) {
+            Err(create_database_error!("insert", "message"))
+        } else {
+            messages.insert(message.id.to_string(), message.clone());
+            Ok(())
+        }
+    }
+
+    /// Fetch a message by its id
+    async fn fetch_message(&self, id: &str) -> Result<Message> {
+        let messages = self.messages.lock().await;
+        messages
+            .get(id)
+            .cloned()
+            .ok_or_else(|| create_error!(NotFound))
+    }
+
+    /// Fetch multiple messages by given query
+    async fn fetch_messages(&self, query: MessageQuery) -> Result<Vec<Message>> {
+        let messages = self.messages.lock().await;
+        let matched_messages = messages
+            .values()
+            .filter(|message| {
+                if let Some(channel) = &query.filter.channel {
+                    if &message.channel != channel {
+                        return false;
+                    }
+                }
+
+                if let Some(author) = &query.filter.author {
+                    if &message.author != author {
+                        return false;
+                    }
+                }
+
+                if let Some(query) = &query.filter.query {
+                    if let Some(content) = &message.content {
+                        if !content.to_lowercase().contains(query) {
+                            return false;
+                        }
+                    } else {
+                        return false;
+                    }
+                }
+
+                true
+            })
+            .cloned()
+            .collect();
+
+        // TODO: sorting, etc
+
+        Ok(matched_messages)
+
+        /*
+        // 2. Find query limit
+        let limit = query.limit.unwrap_or(50);
+
+        // 3. Apply message time period
+        match query.time_period {
+            MessageTimePeriod::Relative { nearby } => {
+                // 3.1. Prepare filters
+                let mut older_message_filter = filter.clone();
+                let mut newer_message_filter = filter;
+
+                older_message_filter.insert(
+                    "_id",
+                    doc! {
+                        "$lt": &nearby
+                    },
+                );
+
+                newer_message_filter.insert(
+                    "_id",
+                    doc! {
+                        "$gte": &nearby
+                    },
+                );
+
+                // 3.2. Execute in both directions
+                let (a, b) = try_join!(
+                    self.find_with_options::<_, Message>(
+                        COL,
+                        newer_message_filter,
+                        FindOptions::builder()
+                            .limit(limit / 2 + 1)
+                            .sort(doc! {
+                                "_id": 1_i32
+                            })
+                            .build(),
+                    ),
+                    self.find_with_options::<_, Message>(
+                        COL,
+                        older_message_filter,
+                        FindOptions::builder()
+                            .limit(limit / 2)
+                            .sort(doc! {
+                                "_id": -1_i32
+                            })
+                            .build(),
+                    )
+                )
+                .map_err(|_| create_database_error!("find", COL))?;
+
+                Ok([a, b].concat())
+            }
+            MessageTimePeriod::Absolute {
+                before,
+                after,
+                sort,
+            } => {
+                // 3.1. Apply message ID filter
+                if let Some(doc) = match (before, after) {
+                    (Some(before), Some(after)) => Some(doc! {
+                        "$lt": before,
+                        "$gt": after
+                    }),
+                    (Some(before), _) => Some(doc! {
+                        "$lt": before
+                    }),
+                    (_, Some(after)) => Some(doc! {
+                        "$gt": after
+                    }),
+                    _ => None,
+                } {
+                    filter.insert("_id", doc);
+                }
+
+                // 3.2. Execute with given message sort
+                self.find_with_options(
+                    COL,
+                    filter,
+                    FindOptions::builder()
+                        .limit(limit)
+                        .sort(match sort.unwrap_or(MessageSort::Latest) {
+                            // Sort by relevance, fallback to latest
+                            MessageSort::Relevance => {
+                                if is_search_query {
+                                    doc! {
+                                        "score": {
+                                            "$meta": "textScore"
+                                        }
+                                    }
+                                } else {
+                                    doc! {
+                                        "_id": -1_i32
+                                    }
+                                }
+                            }
+                            // Sort by latest first
+                            MessageSort::Latest => doc! {
+                                "_id": -1_i32
+                            },
+                            // Sort by oldest first
+                            MessageSort::Oldest => doc! {
+                                "_id": 1_i32
+                            },
+                        })
+                        .build(),
+                )
+                .await
+                .map_err(|_| create_database_error!("find", COL))
+            }
+        }*/
+    }
+
+    /// Update a given message with new information
+    async fn update_message(&self, id: &str, message: &PartialMessage) -> Result<()> {
+        let mut messages = self.messages.lock().await;
+        if let Some(message_data) = messages.get_mut(id) {
+            message_data.apply_options(message.to_owned());
+            Ok(())
+        } else {
+            Err(create_error!(NotFound))
+        }
+    }
+
+    /// Append information to a given message
+    async fn append_message(&self, id: &str, append: &AppendMessage) -> Result<()> {
+        let mut messages = self.messages.lock().await;
+        if let Some(message_data) = messages.get_mut(id) {
+            if let Some(embeds) = &append.embeds {
+                if !embeds.is_empty() {
+                    if let Some(embeds_data) = &mut message_data.embeds {
+                        embeds_data.extend(embeds.clone());
+                    } else {
+                        message_data.embeds = Some(embeds.clone());
+                    }
+                }
+            }
+
+            Ok(())
+        } else {
+            Err(create_error!(NotFound))
+        }
+    }
+
+    /// Add a new reaction to a message
+    async fn add_reaction(&self, id: &str, emoji: &str, user: &str) -> Result<()> {
+        let mut messages = self.messages.lock().await;
+        if let Some(message) = messages.get_mut(id) {
+            if let Some(users) = message.reactions.get_mut(emoji) {
+                users.insert(user.to_string());
+            } else {
+                message
+                    .reactions
+                    .insert(emoji.to_string(), IndexSet::from([user.to_string()]));
+            }
+
+            Ok(())
+        } else {
+            Err(create_error!(NotFound))
+        }
+    }
+
+    /// Remove a reaction from a message
+    async fn remove_reaction(&self, id: &str, emoji: &str, user: &str) -> Result<()> {
+        let mut messages = self.messages.lock().await;
+        if let Some(message) = messages.get_mut(id) {
+            if let Some(users) = message.reactions.get_mut(emoji) {
+                users.remove(&user.to_string());
+            }
+
+            Ok(())
+        } else {
+            Err(create_error!(NotFound))
+        }
+    }
+
+    /// Remove reaction from a message
+    async fn clear_reaction(&self, id: &str, emoji: &str) -> Result<()> {
+        let mut messages = self.messages.lock().await;
+        if let Some(message) = messages.get_mut(id) {
+            message.reactions.remove(emoji);
+            Ok(())
+        } else {
+            Err(create_error!(NotFound))
+        }
+    }
+
+    /// Delete a message from the database by its id
+    async fn delete_message(&self, id: &str) -> Result<()> {
+        let mut messages = self.messages.lock().await;
+        if messages.remove(id).is_some() {
+            Ok(())
+        } else {
+            Err(create_error!(NotFound))
+        }
+    }
+
+    /// Delete messages from a channel by their ids and corresponding channel id
+    async fn delete_messages(&self, channel: &str, ids: &[String]) -> Result<()> {
+        self.messages
+            .lock()
+            .await
+            .retain(|id, message| message.channel != channel && !ids.contains(id));
+
+        Ok(())
+    }
+}

crates/core/database/src/models/mod.rs

@@ -1,9 +1,14 @@
 mod admin_migrations;
 mod bots;
+mod channel_invites;
+mod channel_unreads;
 mod channel_webhooks;
 mod channels;
+mod emojis;
 mod files;
-mod safety_strikes;
+mod messages;
+mod ratelimit_events;
+mod server_bans;
 mod server_members;
 mod servers;
 mod user_settings;
@@ -11,10 +16,15 @@ mod users;
 
 pub use admin_migrations::*;
 pub use bots::*;
+pub use channel_invites::*;
+pub use channel_unreads::*;
 pub use channel_webhooks::*;
 pub use channels::*;
+pub use emojis::*;
 pub use files::*;
-pub use safety_strikes::*;
+pub use messages::*;
+pub use ratelimit_events::*;
+pub use server_bans::*;
 pub use server_members::*;
 pub use servers::*;
 pub use user_settings::*;
@@ -28,9 +38,14 @@ pub trait AbstractDatabase:
     + admin_migrations::AbstractMigrations
     + bots::AbstractBots
     + channels::AbstractChannels
+    + channel_invites::AbstractChannelInvites
+    + channel_unreads::AbstractChannelUnreads
     + channel_webhooks::AbstractWebhooks
+    + emojis::AbstractEmojis
     + files::AbstractAttachments
-    + safety_strikes::AbstractAccountStrikes
+    + messages::AbstractMessages
+    + ratelimit_events::AbstractRatelimitEvents
+    + server_bans::AbstractServerBans
     + server_members::AbstractServerMembers
     + servers::AbstractServers
     + user_settings::AbstractUserSettings

crates/core/database/src/models/ratelimit_events/mod.rs

@@ -0,0 +1,5 @@
+mod model;
+mod ops;
+
+pub use model::*;
+pub use ops::*;

crates/core/database/src/models/ratelimit_events/model.rs

@@ -0,0 +1,47 @@
+use std::fmt;
+
+use revolt_result::Result;
+use ulid::Ulid;
+
+use crate::Database;
+
+auto_derived!(
+    /// Ratelimit Event
+    pub struct RatelimitEvent {
+        /// Id
+        #[serde(rename = "_id")]
+        pub id: String,
+        /// Relevant Object Id
+        pub target_id: String,
+        /// Type of event
+        pub event_type: RatelimitEventType,
+    }
+
+    /// Event type
+    pub enum RatelimitEventType {
+        DiscriminatorChange,
+    }
+);
+
+impl fmt::Display for RatelimitEventType {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        fmt::Debug::fmt(self, f)
+    }
+}
+
+#[allow(clippy::disallowed_methods)]
+impl RatelimitEvent {
+    /// Create ratelimit event
+    pub async fn create(
+        db: &Database,
+        target_id: String,
+        event_type: RatelimitEventType,
+    ) -> Result<()> {
+        db.insert_ratelimit_event(&RatelimitEvent {
+            id: Ulid::new().to_string(),
+            target_id,
+            event_type,
+        })
+        .await
+    }
+}

crates/core/database/src/models/ratelimit_events/ops.rs

@@ -0,0 +1,20 @@
+use std::time::Duration;
+
+use crate::{revolt_result::Result, RatelimitEvent, RatelimitEventType};
+mod mongodb;
+mod reference;
+
+#[async_trait]
+pub trait AbstractRatelimitEvents: Sync + Send {
+    /// Insert a new ratelimit event
+    async fn insert_ratelimit_event(&self, event: &RatelimitEvent) -> Result<()>;
+
+    /// Count number of events in given duration and check if we've hit the limit
+    async fn has_ratelimited(
+        &self,
+        target_id: &str,
+        event_type: RatelimitEventType,
+        period: Duration,
+        count: usize,
+    ) -> Result<bool>;
+}

crates/core/database/src/models/ratelimit_events/ops/mongodb.rs

@@ -0,0 +1,40 @@
+use std::time::{Duration, SystemTime};
+
+use super::AbstractRatelimitEvents;
+use crate::{MongoDb, RatelimitEvent, RatelimitEventType};
+use revolt_result::Result;
+use ulid::Ulid;
+
+static COL: &str = "ratelimit_events";
+
+#[async_trait]
+impl AbstractRatelimitEvents for MongoDb {
+    /// Insert a new ratelimit event
+    async fn insert_ratelimit_event(&self, event: &RatelimitEvent) -> Result<()> {
+        query!(self, insert_one, COL, &event).map(|_| ())
+    }
+
+    /// Count number of events in given duration and check if we've hit the limit
+    async fn has_ratelimited(
+        &self,
+        target_id: &str,
+        event_type: RatelimitEventType,
+        period: Duration,
+        count: usize,
+    ) -> Result<bool> {
+        self.col::<RatelimitEvent>(COL)
+            .count_documents(
+                doc! {
+                    "_id": {
+                        "$gte": Ulid::from_datetime(SystemTime::now() - period).to_string()
+                    },
+                    "target_id": target_id,
+                    "event_type": event_type.to_string()
+                },
+                None,
+            )
+            .await
+            .map(|c| c as usize >= count)
+            .map_err(|_| create_database_error!("count_documents", COL))
+    }
+}

crates/core/database/src/models/ratelimit_events/ops/reference.rs

@@ -0,0 +1,28 @@
+use std::time::Duration;
+
+use super::AbstractRatelimitEvents;
+use crate::RatelimitEvent;
+use crate::RatelimitEventType;
+use crate::ReferenceDb;
+use revolt_result::Result;
+
+#[async_trait]
+impl AbstractRatelimitEvents for ReferenceDb {
+    /// Insert a new ratelimit event
+    async fn insert_ratelimit_event(&self, _event: &RatelimitEvent) -> Result<()> {
+        // TODO: implement
+        unimplemented!()
+    }
+
+    /// Count number of events in given duration and check if we've hit the limit
+    async fn has_ratelimited(
+        &self,
+        _target_id: &str,
+        _event_type: RatelimitEventType,
+        _period: Duration,
+        _count: usize,
+    ) -> Result<bool> {
+        // TODO: implement
+        unimplemented!()
+    }
+}

crates/core/database/src/models/safety_strikes/model.rs

@@ -1,124 +0,0 @@
-use revolt_result::Result;
-
-use crate::Database;
-
-auto_derived_partial!(
-    /// Account Strike
-    pub struct AccountStrike {
-        /// Strike Id
-        #[serde(rename = "_id")]
-        pub id: String,
-        /// Id of reported user
-        pub user_id: String,
-        /// Id of moderator
-        pub moderator_id: String,
-
-        /// Attached reason
-        pub reason: String,
-    },
-    "PartialAccountStrike"
-);
-
-#[allow(clippy::disallowed_methods)]
-impl AccountStrike {
-    pub async fn create(
-        db: &Database,
-        user_id: String,
-        reason: String,
-        moderator_id: String,
-    ) -> Result<AccountStrike> {
-        let strike = AccountStrike {
-            id: ulid::Ulid::new().to_string(),
-            user_id,
-            moderator_id,
-            reason,
-        };
-
-        db.insert_account_strike(&strike).await?;
-        Ok(strike)
-    }
-
-    /// Update this strike
-    pub async fn update(&mut self, db: &Database, partial: PartialAccountStrike) -> Result<()> {
-        db.update_account_strike(&self.id, &partial).await?;
-        self.apply_options(partial);
-        Ok(())
-    }
-
-    /// Delete this strike
-    pub async fn delete(&self, db: &Database) -> Result<()> {
-        db.delete_account_strike(&self.id).await
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use std::collections::HashSet;
-
-    use crate::{AccountStrike, PartialAccountStrike};
-
-    #[async_std::test]
-    async fn crud() {
-        database_test!(|db| async move {
-            let user_id = "user";
-
-            let strike = AccountStrike::create(
-                &db,
-                user_id.to_string(),
-                "reason 1".to_string(),
-                "moderator_id".to_string(),
-            )
-            .await
-            .unwrap();
-
-            let mut updated_strike = strike.clone();
-            updated_strike
-                .update(
-                    &db,
-                    PartialAccountStrike {
-                        reason: Some("new reason".to_string()),
-                        ..Default::default()
-                    },
-                )
-                .await
-                .unwrap();
-
-            let strike2 = AccountStrike::create(
-                &db,
-                user_id.to_string(),
-                "reason 2".to_string(),
-                "moderator_id".to_string(),
-            )
-            .await
-            .unwrap();
-
-            let strikes = db.fetch_account_strikes_by_user(user_id).await.unwrap();
-
-            let ids = strikes
-                .iter()
-                .cloned()
-                .map(|strike| strike.id)
-                .collect::<HashSet<String>>();
-
-            assert!(ids.contains(&strike.id));
-            assert!(ids.contains(&strike2.id));
-
-            let fetched_strike = strikes
-                .into_iter()
-                .find(|entry| entry.id == strike.id)
-                .unwrap();
-
-            assert_eq!(fetched_strike, updated_strike);
-            assert_ne!(fetched_strike, strike);
-
-            strike.delete(&db).await.unwrap();
-            assert_eq!(
-                1,
-                db.fetch_account_strikes_by_user(user_id)
-                    .await
-                    .unwrap()
-                    .len()
-            )
-        });
-    }
-}

crates/core/database/src/models/safety_strikes/ops.rs

@@ -1,24 +0,0 @@
-use revolt_result::Result;
-
-use crate::{AccountStrike, PartialAccountStrike};
-
-mod mongodb;
-mod reference;
-
-#[async_trait]
-pub trait AbstractAccountStrikes: Sync + Send {
-    /// Insert new strike into the database
-    async fn insert_account_strike(&self, strike: &AccountStrike) -> Result<()>;
-
-    /// Fetch strike by id
-    async fn fetch_account_strike(&self, id: &str) -> Result<AccountStrike>;
-
-    /// Fetch strikes by user id
-    async fn fetch_account_strikes_by_user(&self, user_id: &str) -> Result<Vec<AccountStrike>>;
-
-    /// Update strike with new information
-    async fn update_account_strike(&self, id: &str, partial: &PartialAccountStrike) -> Result<()>;
-
-    /// Delete a strike from the database
-    async fn delete_account_strike(&self, id: &str) -> Result<()>;
-}

crates/core/database/src/models/safety_strikes/ops/mongodb.rs

@@ -1,55 +0,0 @@
-use futures::StreamExt;
-use revolt_result::Result;
-
-use crate::MongoDb;
-use crate::{AccountStrike, PartialAccountStrike};
-
-use super::AbstractAccountStrikes;
-
-static COL: &str = "safety_strikes";
-
-#[async_trait]
-impl AbstractAccountStrikes for MongoDb {
-    /// Insert new strike into the database
-    async fn insert_account_strike(&self, strike: &AccountStrike) -> Result<()> {
-        query!(self, insert_one, COL, &strike).map(|_| ())
-    }
-
-    /// Fetch strike by id
-    async fn fetch_account_strike(&self, id: &str) -> Result<AccountStrike> {
-        query!(self, find_one_by_id, COL, id)?.ok_or_else(|| create_error!(NotFound))
-    }
-
-    /// Fetch strikes by user id
-    async fn fetch_account_strikes_by_user(&self, user_id: &str) -> Result<Vec<AccountStrike>> {
-        Ok(self
-            .col::<AccountStrike>(COL)
-            .find(
-                doc! {
-                    "user_id": user_id,
-                },
-                None,
-            )
-            .await
-            .map_err(|_| create_database_error!("find", COL))?
-            .filter_map(|s| async {
-                if cfg!(debug_assertions) {
-                    Some(s.unwrap())
-                } else {
-                    s.ok()
-                }
-            })
-            .collect()
-            .await)
-    }
-
-    /// Update strike with new information
-    async fn update_account_strike(&self, id: &str, partial: &PartialAccountStrike) -> Result<()> {
-        query!(self, update_one_by_id, COL, id, partial, vec![], None).map(|_| ())
-    }
-
-    /// Delete a strike from the database
-    async fn delete_account_strike(&self, id: &str) -> Result<()> {
-        query!(self, delete_one_by_id, COL, id).map(|_| ())
-    }
-}

crates/core/database/src/models/safety_strikes/ops/reference.rs

@@ -1,60 +0,0 @@
-use revolt_result::Result;
-
-use crate::ReferenceDb;
-use crate::{AccountStrike, PartialAccountStrike};
-
-use super::AbstractAccountStrikes;
-
-#[async_trait]
-impl AbstractAccountStrikes for ReferenceDb {
-    /// Insert new strike into the database
-    async fn insert_account_strike(&self, strike: &AccountStrike) -> Result<()> {
-        let mut strikes = self.account_strikes.lock().await;
-        if strikes.contains_key(&strike.id) {
-            Err(create_database_error!("insert", "strike"))
-        } else {
-            strikes.insert(strike.id.to_string(), strike.clone());
-            Ok(())
-        }
-    }
-
-    /// Fetch strike by id
-    async fn fetch_account_strike(&self, id: &str) -> Result<AccountStrike> {
-        let strikes = self.account_strikes.lock().await;
-        strikes
-            .get(id)
-            .cloned()
-            .ok_or_else(|| create_error!(NotFound))
-    }
-
-    /// Fetch strikes by user id
-    async fn fetch_account_strikes_by_user(&self, user_id: &str) -> Result<Vec<AccountStrike>> {
-        let strikes = self.account_strikes.lock().await;
-        Ok(strikes
-            .values()
-            .filter(|strike| strike.user_id == user_id)
-            .cloned()
-            .collect())
-    }
-
-    /// Update strike with new information
-    async fn update_account_strike(&self, id: &str, partial: &PartialAccountStrike) -> Result<()> {
-        let mut strikes = self.account_strikes.lock().await;
-        if let Some(strike) = strikes.get_mut(id) {
-            strike.apply_options(partial.clone());
-            Ok(())
-        } else {
-            Err(create_error!(NotFound))
-        }
-    }
-
-    /// Delete a strike from the database
-    async fn delete_account_strike(&self, id: &str) -> Result<()> {
-        let mut strikes = self.account_strikes.lock().await;
-        if strikes.remove(id).is_some() {
-            Ok(())
-        } else {
-            Err(create_error!(NotFound))
-        }
-    }
-}

crates/core/database/src/models/server_bans/mod.rs

@@ -0,0 +1,5 @@
+mod model;
+mod ops;
+
+pub use model::*;
+pub use ops::*;

crates/core/database/src/models/server_bans/model.rs

@@ -0,0 +1,12 @@
+use crate::MemberCompositeKey;
+
+auto_derived!(
+    /// Server Ban
+    pub struct ServerBan {
+        /// Unique member id
+        #[serde(rename = "_id")]
+        pub id: MemberCompositeKey,
+        /// Reason for ban creation
+        pub reason: Option<String>,
+    }
+);

crates/core/database/src/models/server_bans/ops.rs

@@ -0,0 +1,21 @@
+use revolt_result::Result;
+
+use crate::{MemberCompositeKey, ServerBan};
+
+mod mongodb;
+mod reference;
+
+#[async_trait]
+pub trait AbstractServerBans: Sync + Send {
+    /// Insert new ban into database
+    async fn insert_ban(&self, ban: &ServerBan) -> Result<()>;
+
+    /// Fetch a server ban by server and user id
+    async fn fetch_ban(&self, server_id: &str, user_id: &str) -> Result<ServerBan>;
+
+    /// Fetch all bans in a server
+    async fn fetch_bans(&self, server_id: &str) -> Result<Vec<ServerBan>>;
+
+    /// Delete a ban from the database
+    async fn delete_ban(&self, id: &MemberCompositeKey) -> Result<()>;
+}

crates/core/database/src/models/server_bans/ops/mongodb.rs

@@ -0,0 +1,56 @@
+use revolt_result::Result;
+
+use crate::MongoDb;
+use crate::{MemberCompositeKey, ServerBan};
+
+use super::AbstractServerBans;
+
+static COL: &str = "server_bans";
+
+#[async_trait]
+impl AbstractServerBans for MongoDb {
+    /// Insert new ban into database
+    async fn insert_ban(&self, ban: &ServerBan) -> Result<()> {
+        query!(self, insert_one, COL, &ban).map(|_| ())
+    }
+
+    /// Fetch a server ban by server and user id
+    async fn fetch_ban(&self, server_id: &str, user_id: &str) -> Result<ServerBan> {
+        query!(
+            self,
+            find_one,
+            COL,
+            doc! {
+                "_id.server": server_id,
+                "_id.user": user_id
+            }
+        )?
+        .ok_or_else(|| create_error!(NotFound))
+    }
+
+    /// Fetch all bans in a server
+    async fn fetch_bans(&self, server_id: &str) -> Result<Vec<ServerBan>> {
+        query!(
+            self,
+            find,
+            COL,
+            doc! {
+                "_id.server": server_id
+            }
+        )
+    }
+
+    /// Delete a ban from the database
+    async fn delete_ban(&self, id: &MemberCompositeKey) -> Result<()> {
+        query!(
+            self,
+            delete_one,
+            COL,
+            doc! {
+                "_id.server": &id.server,
+                "_id.user": &id.user
+            }
+        )
+        .map(|_| ())
+    }
+}

crates/core/database/src/models/server_bans/ops/reference.rs

@@ -0,0 +1,52 @@
+use revolt_result::Result;
+
+use crate::ReferenceDb;
+use crate::{MemberCompositeKey, ServerBan};
+
+use super::AbstractServerBans;
+
+#[async_trait]
+impl AbstractServerBans for ReferenceDb {
+    /// Insert new ban into database
+    async fn insert_ban(&self, ban: &ServerBan) -> Result<()> {
+        let mut server_bans = self.server_bans.lock().await;
+        if server_bans.contains_key(&ban.id) {
+            Err(create_database_error!("insert", "ban"))
+        } else {
+            server_bans.insert(ban.id.clone(), ban.clone());
+            Ok(())
+        }
+    }
+
+    /// Fetch a server ban by server and user id
+    async fn fetch_ban(&self, server_id: &str, user_id: &str) -> Result<ServerBan> {
+        let server_bans = self.server_bans.lock().await;
+        server_bans
+            .get(&MemberCompositeKey {
+                server: server_id.to_string(),
+                user: user_id.to_string(),
+            })
+            .cloned()
+            .ok_or_else(|| create_error!(NotFound))
+    }
+
+    /// Fetch all bans in a server
+    async fn fetch_bans(&self, server_id: &str) -> Result<Vec<ServerBan>> {
+        let server_bans = self.server_bans.lock().await;
+        Ok(server_bans
+            .values()
+            .filter(|member| member.id.server == server_id)
+            .cloned()
+            .collect())
+    }
+
+    /// Delete a ban from the database
+    async fn delete_ban(&self, id: &MemberCompositeKey) -> Result<()> {
+        let mut server_bans = self.server_bans.lock().await;
+        if server_bans.remove(id).is_some() {
+            Ok(())
+        } else {
+            Err(create_error!(NotFound))
+        }
+    }
+}

crates/core/database/src/models/server_members/model.rs

@@ -1,7 +1,11 @@
 use iso8601_timestamp::Timestamp;
-use revolt_result::Result;
+use revolt_permissions::{calculate_channel_permissions, ChannelPermission};
+use revolt_result::{create_error, Result};
 
-use crate::{Database, File, Server};
+use crate::{
+    events::client::EventV1, util::permissions::DatabasePermissionQuery, Database, File, Server,
+    SystemMessage, User,
+};
 
 auto_derived_partial!(
     /// Server Member
@@ -11,8 +15,7 @@ auto_derived_partial!(
         pub id: MemberCompositeKey,
 
         /// Time at which this user joined the server
-        #[serde(skip_serializing_if = "Option::is_none")]
+        pub joined_at: Timestamp,
-        pub joined_at: Option<Timestamp>,
 
         /// Member's nickname
         #[serde(skip_serializing_if = "Option::is_none")]
@@ -57,7 +60,102 @@ auto_derived!(
     }
 );
 
+impl Default for Member {
+    fn default() -> Self {
+        Self {
+            id: Default::default(),
+            joined_at: Timestamp::now_utc(),
+            nickname: None,
+            avatar: None,
+            roles: vec![],
+            timeout: None,
+        }
+    }
+}
+
+#[allow(clippy::disallowed_methods)]
 impl Member {
+    /// Create a new member in a server
+    pub async fn create(
+        db: &Database,
+        server: &Server,
+        user: &User,
+        // channels: Option<Vec<Channel>>,
+        //) -> Result<Vec<Channel>> {
+    ) -> Result<()> {
+        if db.fetch_ban(&server.id, &user.id).await.is_ok() {
+            return Err(create_error!(Banned));
+        }
+
+        if db.fetch_member(&server.id, &user.id).await.is_ok() {
+            return Err(create_error!(AlreadyInServer));
+        }
+
+        let member = Member {
+            id: MemberCompositeKey {
+                server: server.id.to_string(),
+                user: user.id.to_string(),
+            },
+            ..Default::default()
+        };
+
+        db.insert_member(&member).await?;
+
+        let mut channels = vec![];
+
+        if true {
+            let query = DatabasePermissionQuery::new(db, user).server(server);
+            let existing_channels = db.fetch_channels(&server.channels).await?;
+
+            for channel in existing_channels {
+                let mut channel_query = query.clone().channel(&channel);
+
+                if calculate_channel_permissions(&mut channel_query)
+                    .await
+                    .has_channel_permission(ChannelPermission::ViewChannel)
+                {
+                    channels.push(channel);
+                }
+            }
+        }
+
+        EventV1::ServerMemberJoin {
+            id: server.id.clone(),
+            user: user.id.clone(),
+        }
+        .p(server.id.clone())
+        .await;
+
+        EventV1::ServerCreate {
+            id: server.id.clone(),
+            server: server.clone().into(),
+            channels: channels
+                .clone()
+                .into_iter()
+                .map(|channel| channel.into())
+                .collect(),
+        }
+        .private(user.id.clone())
+        .await;
+
+        if let Some(id) = server
+            .system_messages
+            .as_ref()
+            .and_then(|x| x.user_joined.as_ref())
+        {
+            SystemMessage::UserJoined {
+                id: user.id.clone(),
+            }
+            .into_message(id.to_string())
+            .send_without_notifications(db, false, false)
+            .await
+            .ok();
+        }
+
+        // Ok(channels)
+        Ok(())
+    }
+
     /// Update member data
     pub async fn update<'a>(
         &mut self,
@@ -73,13 +171,13 @@ impl Member {
 
         db.update_member(&self.id, &partial, remove.clone()).await?;
 
-        /* // TODO: EventV1::ServerMemberUpdate {
+        EventV1::ServerMemberUpdate {
-            id: self.id.clone(),
+            id: self.id.clone().into(),
-            data: partial,
+            data: partial.into(),
-            clear: remove,
+            clear: remove.into_iter().map(|field| field.into()).collect(),
         }
         .p(self.id.server.clone())
-        .await; */
+        .await;
 
         Ok(())
     }

crates/core/database/src/models/servers/model.rs

@@ -4,7 +4,7 @@ use revolt_permissions::OverrideField;
 use revolt_result::Result;
 use ulid::Ulid;
 
-use crate::{Database, File};
+use crate::{events::client::EventV1, Database, File};
 
 auto_derived_partial!(
     /// Server
@@ -128,6 +128,7 @@ auto_derived!(
     }
 );
 
+#[allow(clippy::disallowed_methods)]
 impl Server {
     /// Create a server
     pub async fn create(&self, db: &Database) -> Result<()> {
@@ -149,24 +150,24 @@ impl Server {
 
         db.update_server(&self.id, &partial, remove.clone()).await?;
 
-        /* // TODO: EventV1::ServerUpdate {
+        EventV1::ServerUpdate {
             id: self.id.clone(),
-            data: partial,
+            data: partial.into(),
-            clear: remove,
+            clear: remove.into_iter().map(|v| v.into()).collect(),
         }
         .p(self.id.clone())
-        .await; */
+        .await;
 
         Ok(())
     }
 
     /// Delete a server
     pub async fn delete(self, db: &Database) -> Result<()> {
-        /* // TODO: EventV1::ServerDelete {
+        EventV1::ServerDelete {
             id: self.id.clone(),
         }
         .p(self.id.clone())
-        .await; */
+        .await;
 
         db.delete_server(&self.id).await
     }
@@ -364,14 +365,14 @@ impl Role {
         let role_id = Ulid::new().to_string();
         db.insert_role(server_id, &role_id, self).await?;
 
-        /* // TODO: EventV1::ServerRoleUpdate {
+        EventV1::ServerRoleUpdate {
             id: server_id.to_string(),
             role_id: role_id.to_string(),
-            data: self.clone().into_optional(),
+            data: self.clone().into_optional().into(),
             clear: vec![],
         }
         .p(server_id.to_string())
-        .await; */
+        .await;
 
         Ok(role_id)
     }
@@ -394,14 +395,14 @@ impl Role {
         db.update_role(server_id, role_id, &partial, remove.clone())
             .await?;
 
-        /* // TODO: EventV1::ServerRoleUpdate {
+        EventV1::ServerRoleUpdate {
             id: server_id.to_string(),
             role_id: role_id.to_string(),
-            data: partial,
+            data: partial.into(),
             clear: vec![],
         }
         .p(server_id.to_string())
-        .await; */
+        .await;
 
         Ok(())
     }
@@ -415,12 +416,12 @@ impl Role {
 
     /// Delete a role
     pub async fn delete(self, db: &Database, server_id: &str, role_id: &str) -> Result<()> {
-        /* // TODO: EventV1::ServerRoleDelete {
+        EventV1::ServerRoleDelete {
             id: server_id.to_string(),
             role_id: role_id.to_string(),
         }
         .p(server_id.to_string())
-        .await; */
+        .await;
 
         db.delete_role(server_id, role_id).await
     }

crates/core/database/src/models/users/mod.rs

@@ -2,8 +2,12 @@ mod model;
 mod ops;
 #[cfg(feature = "rocket-impl")]
 mod rocket;
+#[cfg(feature = "rocket-impl")]
+mod schema;
 
 #[cfg(feature = "rocket-impl")]
 pub use self::rocket::*;
+#[cfg(feature = "rocket-impl")]
+pub use self::schema::*;
 pub use model::*;
 pub use ops::*;

crates/core/database/src/models/users/model.rs

@@ -1,9 +1,11 @@
-use std::collections::HashSet;
+use std::{collections::HashSet, time::Duration};
 
-use crate::{Database, File};
+use crate::{events::client::EventV1, Database, File, RatelimitEvent};
 
 use once_cell::sync::Lazy;
-use revolt_result::{Error, ErrorType, Result};
+use rand::seq::SliceRandom;
+use revolt_result::{create_error, Error, ErrorType, Result};
+use ulid::Ulid;
 
 auto_derived_partial!(
     /// # User
@@ -49,6 +51,15 @@ auto_derived_partial!(
 );
 
 auto_derived!(
+    /// Optional fields on user object
+    pub enum FieldsUser {
+        Avatar,
+        StatusText,
+        StatusPresence,
+        ProfileContent,
+        ProfileBackground,
+    }
+
     /// User's relationship with another user (or themselves)
     pub enum RelationshipStatus {
         None,
@@ -106,18 +117,202 @@ auto_derived!(
         /// Id of the owner of this bot
         pub owner: String,
     }
-
-    /// Optional fields on user object
-    pub enum FieldsUser {
-        Avatar,
-        StatusText,
-        StatusPresence,
-        ProfileContent,
-        ProfileBackground,
-    }
 );
 
+pub static DISCRIMINATOR_SEARCH_SPACE: Lazy<HashSet<String>> = Lazy::new(|| {
+    let mut set = (2..9999)
+        .map(|v| format!("{:0>4}", v))
+        .collect::<HashSet<String>>();
+
+    for discrim in [
+        123, 1234, 1111, 2222, 3333, 4444, 5555, 6666, 7777, 8888, 9999,
+    ] {
+        set.remove(&format!("{:0>4}", discrim));
+    }
+
+    set.into_iter().collect()
+});
+
+#[allow(clippy::derivable_impls)]
+impl Default for User {
+    fn default() -> Self {
+        Self {
+            id: Default::default(),
+            username: Default::default(),
+            discriminator: Default::default(),
+            display_name: Default::default(),
+            avatar: Default::default(),
+            relations: Default::default(),
+            badges: Default::default(),
+            status: Default::default(),
+            profile: Default::default(),
+            flags: Default::default(),
+            privileged: Default::default(),
+            bot: Default::default(),
+        }
+    }
+}
+
+#[allow(clippy::disallowed_methods)]
 impl User {
+    /// Create a new user
+    pub async fn create<I, D>(
+        db: &Database,
+        username: String,
+        account_id: I,
+        data: D,
+    ) -> Result<User>
+    where
+        I: Into<Option<String>>,
+        D: Into<Option<PartialUser>>,
+    {
+        let username = User::validate_username(username)?;
+        let mut user = User {
+            id: account_id.into().unwrap_or_else(|| Ulid::new().to_string()),
+            discriminator: User::find_discriminator(db, &username, None).await?,
+            username,
+            ..Default::default()
+        };
+
+        if let Some(data) = data.into() {
+            user.apply_options(data);
+        }
+
+        db.insert_user(&user).await?;
+        Ok(user)
+    }
+
+    /// Check whether two users have a mutual connection
+    ///
+    /// This will check if user and user_b share a server or a group.
+    pub async fn has_mutual_connection(&self, db: &Database, user_b: &str) -> Result<bool> {
+        Ok(!db
+            .fetch_mutual_server_ids(&self.id, user_b)
+            .await?
+            .is_empty()
+            || !db
+                .fetch_mutual_channel_ids(&self.id, user_b)
+                .await?
+                .is_empty())
+    }
+
+    /// Sanitise and validate a username can be used
+    pub fn validate_username(username: String) -> Result<String> {
+        // Copy the username for validation
+        let username_lowercase = username.to_lowercase();
+
+        // Block homoglyphs
+        if decancer::cure(&username_lowercase).into_str() != username_lowercase {
+            return Err(create_error!(InvalidUsername));
+        }
+
+        // Ensure the username itself isn't blocked
+        const BLOCKED_USERNAMES: &[&str] = &["admin", "revolt"];
+
+        for username in BLOCKED_USERNAMES {
+            if username_lowercase == *username {
+                return Err(create_error!(InvalidUsername));
+            }
+        }
+
+        // Ensure none of the following substrings show up in the username
+        const BLOCKED_SUBSTRINGS: &[&str] = &["```"];
+
+        for substr in BLOCKED_SUBSTRINGS {
+            if username_lowercase.contains(substr) {
+                return Err(create_error!(InvalidUsername));
+            }
+        }
+
+        Ok(username)
+    }
+
+    // Find a free discriminator for a given username
+    pub async fn find_discriminator(
+        db: &Database,
+        username: &str,
+        preferred: Option<(String, String)>,
+    ) -> Result<String> {
+        let search_space: &HashSet<String> = &DISCRIMINATOR_SEARCH_SPACE;
+        let used_discriminators: HashSet<String> = db
+            .fetch_discriminators_in_use(username)
+            .await?
+            .into_iter()
+            .collect();
+
+        let available_discriminators: Vec<&String> =
+            search_space.difference(&used_discriminators).collect();
+
+        if available_discriminators.is_empty() {
+            return Err(create_error!(UsernameTaken));
+        }
+
+        if let Some((preferred, target_id)) = preferred {
+            if available_discriminators.contains(&&preferred) {
+                return Ok(preferred);
+            } else {
+                if db
+                    .has_ratelimited(
+                        &target_id,
+                        crate::RatelimitEventType::DiscriminatorChange,
+                        Duration::from_secs(60 * 60 * 24),
+                        1,
+                    )
+                    .await?
+                {
+                    return Err(create_error!(DiscriminatorChangeRatelimited));
+                }
+
+                RatelimitEvent::create(
+                    db,
+                    target_id,
+                    crate::RatelimitEventType::DiscriminatorChange,
+                )
+                .await?;
+            }
+        }
+
+        let mut rng = rand::thread_rng();
+        Ok(available_discriminators
+            .choose(&mut rng)
+            .expect("we can assert this has an element")
+            .to_string())
+    }
+
+    /// Update a user's username
+    pub async fn update_username(&mut self, db: &Database, username: String) -> Result<()> {
+        let username = User::validate_username(username)?;
+        if self.username.to_lowercase() == username.to_lowercase() {
+            self.update(
+                db,
+                PartialUser {
+                    username: Some(username),
+                    ..Default::default()
+                },
+                vec![],
+            )
+            .await
+        } else {
+            self.update(
+                db,
+                PartialUser {
+                    discriminator: Some(
+                        User::find_discriminator(
+                            db,
+                            &username,
+                            Some((self.discriminator.to_string(), self.id.clone())),
+                        )
+                        .await?,
+                    ),
+                    username: Some(username),
+                    ..Default::default()
+                },
+                vec![],
+            )
+            .await
+        }
+    }
+
     /// Check whether a username is already in use by another user
     #[allow(dead_code)]
     async fn is_username_taken(db: &Database, username: &str) -> Result<bool> {
@@ -145,13 +340,14 @@ impl User {
         self.apply_options(partial.clone());
         db.update_user(&self.id, &partial, remove.clone()).await?;
 
-        /* // TODO: EventV1::UserUpdate {
+        EventV1::UserUpdate {
             id: self.id.clone(),
-            data: partial,
+            data: partial.into(),
-            clear: remove,
+            clear: remove.into_iter().map(|v| v.into()).collect(),
+            event_id: Some(Ulid::new().to_string()),
         }
         .p_user(self.id.clone(), db)
-        .await; */
+        .await;
 
         Ok(())
     }
@@ -203,17 +399,3 @@ impl User {
         .await
     }
 }
-
-pub static DISCRIMINATOR_SEARCH_SPACE: Lazy<HashSet<String>> = Lazy::new(|| {
-    let mut set = (2..9999)
-        .map(|v| format!("{:0>4}", v))
-        .collect::<HashSet<String>>();
-
-    for discrim in [
-        123, 1234, 1111, 2222, 3333, 4444, 5555, 6666, 7777, 8888, 9999,
-    ] {
-        set.remove(&format!("{:0>4}", discrim));
-    }
-
-    set.into_iter().collect()
-});

crates/core/database/src/models/users/ops.rs

@@ -22,6 +22,9 @@ pub trait AbstractUsers: Sync + Send {
     /// Fetch multiple users by their ids
     async fn fetch_users<'a>(&self, ids: &'a [String]) -> Result<Vec<User>>;
 
+    /// Fetch all discriminators in use for a username
+    async fn fetch_discriminators_in_use(&self, username: &str) -> Result<Vec<String>>;
+
     /// Fetch ids of users that both users are friends with
     async fn fetch_mutual_user_ids(&self, user_a: &str, user_b: &str) -> Result<Vec<String>>;
 

crates/core/database/src/models/users/ops/mongodb.rs

@@ -87,6 +87,39 @@ impl AbstractUsers for MongoDb {
             .await)
     }
 
+    /// Fetch all discriminators in use for a username
+    async fn fetch_discriminators_in_use(&self, username: &str) -> Result<Vec<String>> {
+        #[derive(Deserialize)]
+        struct UserDocument {
+            discriminator: String,
+        }
+
+        Ok(self
+            .col::<UserDocument>(COL)
+            .find(
+                doc! {
+                    "username": username
+                },
+                FindOptions::builder()
+                    .collation(
+                        Collation::builder()
+                            .locale("en")
+                            .strength(CollationStrength::Secondary)
+                            .build(),
+                    )
+                    .projection(doc! { "_id": 0, "discriminator": 1 })
+                    .build(),
+            )
+            .await
+            .map_err(|_| create_database_error!("find", COL))?
+            .filter_map(|s| async { s.ok() })
+            .collect::<Vec<UserDocument>>()
+            .await
+            .into_iter()
+            .map(|user| user.discriminator)
+            .collect::<Vec<String>>())
+    }
+
     /// Fetch ids of users that both users are friends with
     async fn fetch_mutual_user_ids(&self, user_a: &str, user_b: &str) -> Result<Vec<String>> {
         Ok(self

crates/core/database/src/models/users/ops/reference.rs

@@ -56,6 +56,18 @@ impl AbstractUsers for ReferenceDb {
             .collect()
     }
 
+    /// Fetch all discriminators in use for a username
+    async fn fetch_discriminators_in_use(&self, username: &str) -> Result<Vec<String>> {
+        let users = self.users.lock().await;
+        let lowercase = username.to_lowercase();
+        Ok(users
+            .values()
+            .filter(|user| user.username.to_lowercase() == lowercase)
+            .map(|user| &user.discriminator)
+            .cloned()
+            .collect())
+    }
+
     /// Fetch ids of users that both users are friends with
     async fn fetch_mutual_user_ids(&self, _user_a: &str, _user_b: &str) -> Result<Vec<String>> {
         todo!()

crates/core/database/src/models/users/schema.rs

@@ -0,0 +1,31 @@
+use revolt_okapi::openapi3::{SecurityScheme, SecuritySchemeData};
+use revolt_rocket_okapi::{
+    gen::OpenApiGenerator,
+    request::{OpenApiFromRequest, RequestHeaderInput},
+};
+
+use crate::User;
+
+impl<'r> OpenApiFromRequest<'r> for User {
+    fn from_request_input(
+        _gen: &mut OpenApiGenerator,
+        _name: String,
+        _required: bool,
+    ) -> revolt_rocket_okapi::Result<RequestHeaderInput> {
+        let mut requirements = schemars::Map::new();
+        requirements.insert("Session Token".to_owned(), vec![]);
+
+        Ok(RequestHeaderInput::Security(
+            "Session Token".to_owned(),
+            SecurityScheme {
+                data: SecuritySchemeData::ApiKey {
+                    name: "x-session-token".to_owned(),
+                    location: "header".to_owned(),
+                },
+                description: Some("Used to authenticate as a user.".to_owned()),
+                extensions: schemars::Map::new(),
+            },
+            requirements,
+        ))
+    }
+}

crates/core/database/src/tasks/ack.rs

@@ -0,0 +1,122 @@
+// Queue Type: Debounced
+use crate::Database;
+
+use deadqueue::limited::Queue;
+use once_cell::sync::Lazy;
+use std::{collections::HashMap, time::Duration};
+
+use super::DelayedTask;
+
+/// Enumeration of possible events
+#[derive(Debug, Eq, PartialEq)]
+pub enum AckEvent {
+    /// Add mentions for a user in a channel
+    AddMention {
+        /// Message IDs
+        ids: Vec<String>,
+    },
+
+    /// Acknowledge message in a channel for a user
+    AckMessage {
+        /// Message ID
+        id: String,
+    },
+}
+
+/// Task information
+struct Data {
+    /// Channel to ack
+    channel: String,
+    /// User to ack for
+    user: String,
+    /// Event
+    event: AckEvent,
+}
+
+#[derive(Debug)]
+struct Task {
+    event: AckEvent,
+}
+
+static Q: Lazy<Queue<Data>> = Lazy::new(|| Queue::new(10_000));
+
+/// Queue a new task for a worker
+pub async fn queue(channel: String, user: String, event: AckEvent) {
+    Q.try_push(Data {
+        channel,
+        user,
+        event,
+    })
+    .ok();
+
+    info!("Queue is using {} slots from {}.", Q.len(), Q.capacity());
+}
+
+/// Start a new worker
+pub async fn worker(db: Database) {
+    let mut tasks = HashMap::<(String, String), DelayedTask<Task>>::new();
+    let mut keys = vec![];
+
+    loop {
+        // Find due tasks.
+        for (key, task) in &tasks {
+            if task.should_run() {
+                keys.push(key.clone());
+            }
+        }
+
+        // Commit any due tasks to the database.
+        for key in &keys {
+            if let Some(task) = tasks.remove(key) {
+                let Task { event } = task.data;
+                let (user, channel) = key;
+
+                if let Err(err) = match &event {
+                    #[allow(clippy::disallowed_methods)] // event is sent by higher level function
+                    AckEvent::AckMessage { id } => db.acknowledge_message(channel, user, id).await,
+                    AckEvent::AddMention { ids } => {
+                        db.add_mention_to_unread(channel, user, ids).await
+                    }
+                } {
+                    error!("{err:?} for {event:?}. ({user}, {channel})");
+                } else {
+                    info!("User {user} ack in {channel} with {event:?}");
+                }
+            }
+        }
+
+        // Clear keys
+        keys.clear();
+
+        // Queue incoming tasks.
+        while let Some(Data {
+            channel,
+            user,
+            mut event,
+        }) = Q.try_pop()
+        {
+            let key = (user, channel);
+            if let Some(task) = tasks.get_mut(&key) {
+                task.delay();
+
+                match &mut event {
+                    AckEvent::AddMention { ids } => {
+                        if let AckEvent::AddMention { ids: existing } = &mut task.data.event {
+                            existing.append(ids);
+                        } else {
+                            task.data.event = event;
+                        }
+                    }
+                    AckEvent::AckMessage { .. } => {
+                        task.data.event = event;
+                    }
+                }
+            } else {
+                tasks.insert(key, DelayedTask::new(Task { event }));
+            }
+        }
+
+        // Sleep for an arbitrary amount of time.
+        async_std::task::sleep(Duration::from_secs(1)).await;
+    }
+}

crates/core/database/src/tasks/last_message_id.rs

@@ -0,0 +1,87 @@
+// Queue Type: Debounced
+use deadqueue::limited::Queue;
+use once_cell::sync::Lazy;
+use std::{collections::HashMap, time::Duration};
+
+use crate::{Database, PartialChannel};
+
+use super::DelayedTask;
+
+/// Task information
+struct Data {
+    /// Channel to update
+    channel: String,
+    /// Latest message ID
+    id: String,
+    /// Whether the channel is a DM
+    is_dm: bool,
+}
+
+/// Task information
+#[derive(Debug)]
+struct Task {
+    /// Latest message ID
+    id: String,
+    /// Whether the channel is a DM
+    is_dm: bool,
+}
+
+static Q: Lazy<Queue<Data>> = Lazy::new(|| Queue::new(10_000));
+
+/// Queue a new task for a worker
+pub async fn queue(channel: String, id: String, is_dm: bool) {
+    Q.try_push(Data { channel, id, is_dm }).ok();
+    info!("Queue is using {} slots from {}.", Q.len(), Q.capacity());
+}
+
+/// Start a new worker
+pub async fn worker(db: Database) {
+    let mut tasks = HashMap::<String, DelayedTask<Task>>::new();
+    let mut keys = vec![];
+
+    loop {
+        // Find due tasks.
+        for (key, task) in &tasks {
+            if task.should_run() {
+                keys.push(key.clone());
+            }
+        }
+
+        // Commit any due tasks to the database.
+        for key in &keys {
+            if let Some(task) = tasks.remove(key) {
+                let Task { id, is_dm, .. } = task.data;
+
+                let mut channel = PartialChannel {
+                    last_message_id: Some(id.to_string()),
+                    ..Default::default()
+                };
+
+                if is_dm {
+                    channel.active = Some(true);
+                }
+
+                match db.update_channel(key, &channel, vec![]).await {
+                    Ok(_) => info!("Updated last_message_id for {key} to {id}."),
+                    Err(err) => error!("Failed to update last_message_id with {err:?}!"),
+                }
+            }
+        }
+
+        // Clear keys
+        keys.clear();
+
+        // Queue incoming tasks.
+        while let Some(Data { channel, id, is_dm }) = Q.try_pop() {
+            if let Some(task) = tasks.get_mut(&channel) {
+                task.data.id = id;
+                task.delay();
+            } else {
+                tasks.insert(channel, DelayedTask::new(Task { id, is_dm }));
+            }
+        }
+
+        // Sleep for an arbitrary amount of time.
+        async_std::task::sleep(Duration::from_secs(1)).await;
+    }
+}

crates/core/database/src/tasks/mod.rs

@@ -0,0 +1,58 @@
+//! Semi-important background task management
+
+use crate::Database;
+
+use async_std::task;
+use std::time::Instant;
+
+const WORKER_COUNT: usize = 5;
+
+pub mod ack;
+pub mod last_message_id;
+pub mod process_embeds;
+pub mod web_push;
+
+/// Spawn background workers
+pub async fn start_workers(db: Database) {
+    for _ in 0..WORKER_COUNT {
+        task::spawn(ack::worker(db.clone()));
+        task::spawn(last_message_id::worker(db.clone()));
+        task::spawn(process_embeds::worker(db.clone()));
+        task::spawn(web_push::worker(db.clone().into()));
+    }
+}
+
+/// Task with additional information on when it should run
+pub struct DelayedTask<T> {
+    pub data: T,
+    last_updated: Instant,
+    first_seen: Instant,
+}
+
+/// Commit to database every 30 seconds if the task is particularly active.
+static EXPIRE_CONSTANT: u64 = 30;
+
+/// Otherwise, commit to database after 5 seconds.
+static SAVE_CONSTANT: u64 = 5;
+
+impl<T> DelayedTask<T> {
+    /// Create a new delayed task
+    pub fn new(data: T) -> Self {
+        DelayedTask {
+            data,
+            last_updated: Instant::now(),
+            first_seen: Instant::now(),
+        }
+    }
+
+    /// Push a task further back in time
+    pub fn delay(&mut self) {
+        self.last_updated = Instant::now()
+    }
+
+    /// Check if a task should run yet
+    pub fn should_run(&self) -> bool {
+        self.first_seen.elapsed().as_secs() > EXPIRE_CONSTANT
+            || self.last_updated.elapsed().as_secs() > SAVE_CONSTANT
+    }
+}

crates/core/database/src/tasks/process_embeds.rs

@@ -0,0 +1,170 @@
+use crate::{models::Message, AppendMessage, Database};
+
+use futures::future::join_all;
+use linkify::{LinkFinder, LinkKind};
+use regex::Regex;
+use revolt_config::config;
+use revolt_result::Result;
+
+use async_lock::Semaphore;
+use async_std::task::spawn;
+use deadqueue::limited::Queue;
+use once_cell::sync::Lazy;
+use revolt_models::v0::Embed;
+use std::{collections::HashSet, sync::Arc};
+
+use isahc::prelude::*;
+
+/// Task information
+#[derive(Debug)]
+struct EmbedTask {
+    /// Channel we're processing the event in
+    channel: String,
+    /// ID of the message we're processing
+    id: String,
+    /// Content of the message
+    content: String,
+}
+
+static Q: Lazy<Queue<EmbedTask>> = Lazy::new(|| Queue::new(10_000));
+
+/// Queue a new task for a worker
+pub async fn queue(channel: String, id: String, content: String) {
+    Q.try_push(EmbedTask {
+        channel,
+        id,
+        content,
+    })
+    .ok();
+
+    info!("Queue is using {} slots from {}.", Q.len(), Q.capacity());
+}
+
+/// Start a new worker
+pub async fn worker(db: Database) {
+    let semaphore = Arc::new(Semaphore::new(
+        config().await.api.workers.max_concurrent_connections,
+    ));
+
+    loop {
+        let task = Q.pop().await;
+        let db = db.clone();
+        let semaphore = semaphore.clone();
+
+        spawn(async move {
+            let config = config().await;
+            let embeds = generate(
+                task.content,
+                &config.hosts.january,
+                config.features.limits.default.message_embeds,
+                semaphore,
+            )
+            .await;
+
+            if let Ok(embeds) = embeds {
+                if let Err(err) = Message::append(
+                    &db,
+                    task.id,
+                    task.channel,
+                    AppendMessage {
+                        embeds: Some(embeds),
+                    },
+                )
+                .await
+                {
+                    error!("Encountered an error appending to message: {:?}", err);
+                }
+            }
+        });
+    }
+}
+
+static RE_CODE: Lazy<Regex> = Lazy::new(|| Regex::new("```(?:.|\n)+?```|`(?:.|\n)+?`").unwrap());
+static RE_IGNORED: Lazy<Regex> = Lazy::new(|| Regex::new("(<http.+>)").unwrap());
+
+pub async fn generate(
+    content: String,
+    host: &str,
+    max_embeds: usize,
+    semaphore: Arc<Semaphore>,
+) -> Result<Vec<Embed>> {
+    // Ignore code blocks.
+    let content = RE_CODE.replace_all(&content, "");
+
+    // Ignore all content between angle brackets starting with http.
+    let content = RE_IGNORED.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");
+
+    let mut finder = LinkFinder::new();
+    finder.kinds(&[LinkKind::Url]);
+
+    // Process all links, stripping anchors and
+    // only taking up to `max_embeds` of links.
+    let links: Vec<String> = finder
+        .links(&content)
+        .map(|x| {
+            x.as_str()
+                .chars()
+                .take_while(|&ch| ch != '#')
+                .collect::<String>()
+        })
+        .collect::<HashSet<String>>()
+        .into_iter()
+        .take(max_embeds)
+        .collect();
+
+    // If no links, fail out.
+    if links.is_empty() {
+        return Err(create_error!(LabelMe));
+    }
+
+    // ! FIXME: batch request to january
+    let mut tasks = Vec::new();
+
+    for link in links {
+        let semaphore = semaphore.clone();
+        let host = host.to_string();
+        tasks.push(spawn(async move {
+            let guard = semaphore.acquire().await;
+
+            if let Ok(mut response) = isahc::get_async(format!(
+                "{host}/embed?url={}",
+                url_escape::encode_component(&link)
+            ))
+            .await
+            {
+                drop(guard);
+                response.json::<Embed>().await.ok()
+            } else {
+                None
+            }
+        }));
+    }
+
+    let embeds = join_all(tasks)
+        .await
+        .into_iter()
+        .flatten()
+        .collect::<Vec<Embed>>();
+
+    // Prevent database update when no embeds are found.
+    if !embeds.is_empty() {
+        Ok(embeds)
+    } else {
+        Err(create_error!(LabelMe))
+    }
+}

crates/core/database/src/tasks/web_push.rs

@@ -0,0 +1,162 @@
+use std::collections::HashSet;
+
+use authifier::Database;
+use base64::{
+    engine::{self},
+    Engine as _,
+};
+use deadqueue::limited::Queue;
+use once_cell::sync::Lazy;
+use revolt_config::config;
+use revolt_models::v0::PushNotification;
+use revolt_presence::filter_online;
+use serde_json::json;
+use web_push::{
+    ContentEncoding, IsahcWebPushClient, SubscriptionInfo, SubscriptionKeys, VapidSignatureBuilder,
+    WebPushClient, WebPushMessageBuilder,
+};
+
+/// Task information
+#[derive(Debug)]
+struct PushTask {
+    /// User IDs of the targets that are to receive this notification
+    recipients: Vec<String>,
+    /// Push Notification
+    payload: PushNotification,
+}
+
+static Q: Lazy<Queue<PushTask>> = Lazy::new(|| Queue::new(10_000));
+
+/// Queue a new task for a worker
+pub async fn queue(recipients: Vec<String>, payload: PushNotification) {
+    if recipients.is_empty() {
+        return;
+    }
+
+    let online_ids = filter_online(&recipients).await;
+    let recipients = (&recipients.into_iter().collect::<HashSet<String>>() - &online_ids)
+        .into_iter()
+        .collect::<Vec<String>>();
+
+    Q.try_push(PushTask {
+        recipients,
+        payload,
+    })
+    .ok();
+
+    info!("Queue is using {} slots from {}.", Q.len(), Q.capacity());
+}
+
+/// Start a new worker
+pub async fn worker(db: Database) {
+    let config = config().await;
+
+    let web_push_client = IsahcWebPushClient::new().unwrap();
+    let fcm_client = if config.api.fcm.api_key.is_empty() {
+        None
+    } else {
+        Some(fcm::Client::new())
+    };
+
+    let web_push_private_key = engine::general_purpose::URL_SAFE_NO_PAD
+        .decode(config.api.vapid.private_key)
+        .expect("valid `VAPID_PRIVATE_KEY`");
+
+    loop {
+        let task = Q.pop().await;
+
+        if let Ok(sessions) = db.find_sessions_with_subscription(&task.recipients).await {
+            for session in sessions {
+                if let Some(sub) = session.subscription {
+                    if sub.endpoint == "fcm" {
+                        // Use Firebase Cloud Messaging
+                        if let Some(client) = &fcm_client {
+                            let PushNotification {
+                                author,
+                                icon,
+                                image: _,
+                                body,
+                                tag,
+                                timestamp: _,
+                                url: _,
+                            } = &task.payload;
+
+                            let mut notification = fcm::NotificationBuilder::new();
+                            notification.title(author);
+                            notification.icon(icon);
+                            notification.body(body);
+                            notification.tag(tag);
+                            // TODO: expand support for fields
+                            let notification = notification.finalize();
+
+                            let mut message_builder =
+                                fcm::MessageBuilder::new(&config.api.fcm.api_key, &sub.auth);
+                            message_builder.notification(notification);
+
+                            if let Err(err) = client.send(message_builder.finalize()).await {
+                                error!("Failed to send FCM notification! {:?}", err);
+                            } else {
+                                info!("Sent FCM notification to {:?}.", session.id);
+                            }
+                        } else {
+                            info!("No FCM token was specified!");
+                        }
+                    } else {
+                        // Use Web Push Standard
+                        let subscription = SubscriptionInfo {
+                            endpoint: sub.endpoint,
+                            keys: SubscriptionKeys {
+                                auth: sub.auth,
+                                p256dh: sub.p256dh,
+                            },
+                        };
+
+                        match VapidSignatureBuilder::from_pem(
+                            std::io::Cursor::new(&web_push_private_key),
+                            &subscription,
+                        ) {
+                            Ok(sig_builder) => match sig_builder.build() {
+                                Ok(signature) => {
+                                    let mut builder = WebPushMessageBuilder::new(&subscription);
+                                    builder.set_vapid_signature(signature);
+
+                                    let payload = json!(task.payload).to_string();
+                                    builder
+                                        .set_payload(ContentEncoding::AesGcm, payload.as_bytes());
+
+                                    match builder.build() {
+                                        Ok(msg) => match web_push_client.send(msg).await {
+                                            Ok(_) => {
+                                                info!(
+                                                    "Sent Web Push notification to {:?}.",
+                                                    session.id
+                                                )
+                                            }
+                                            Err(err) => {
+                                                error!("Hit error sending Web Push! {:?}", err)
+                                            }
+                                        },
+                                        Err(err) => {
+                                            error!(
+                                                "Failed to build message for {}! {:?}",
+                                                session.user_id, err
+                                            )
+                                        }
+                                    }
+                                }
+                                Err(err) => error!(
+                                    "Failed to build signature for {}! {:?}",
+                                    session.user_id, err
+                                ),
+                            },
+                            Err(err) => error!(
+                                "Failed to create signature builder for {}! {:?}",
+                                session.user_id, err
+                            ),
+                        }
+                    }
+                }
+            }
+        }
+    }
+}

crates/core/database/src/util/bridge/v0.rs

@@ -1,15 +1,5 @@
 use revolt_models::v0::*;
 
-impl From<crate::AccountStrike> for AccountStrike {
-    fn from(value: crate::AccountStrike) -> Self {
-        AccountStrike {
-            id: value.id,
-            user_id: value.user_id,
-            reason: value.reason,
-        }
-    }
-}
-
 impl crate::Bot {
     pub fn into_public_bot(self, user: crate::User) -> PublicBot {
         #[cfg(debug_assertions)]
@@ -44,6 +34,70 @@ impl From<crate::Bot> for Bot {
     }
 }
 
+impl From<FieldsBot> for crate::FieldsBot {
+    fn from(value: FieldsBot) -> Self {
+        match value {
+            FieldsBot::InteractionsURL => crate::FieldsBot::InteractionsURL,
+            FieldsBot::Token => crate::FieldsBot::Token,
+        }
+    }
+}
+
+impl From<crate::FieldsBot> for FieldsBot {
+    fn from(value: crate::FieldsBot) -> Self {
+        match value {
+            crate::FieldsBot::InteractionsURL => FieldsBot::InteractionsURL,
+            crate::FieldsBot::Token => FieldsBot::Token,
+        }
+    }
+}
+
+impl From<crate::Invite> for Invite {
+    fn from(value: crate::Invite) -> Self {
+        match value {
+            crate::Invite::Group {
+                code,
+                creator,
+                channel,
+            } => Invite::Group {
+                code,
+                creator,
+                channel,
+            },
+            crate::Invite::Server {
+                code,
+                server,
+                creator,
+                channel,
+            } => Invite::Server {
+                code,
+                server,
+                creator,
+                channel,
+            },
+        }
+    }
+}
+
+impl From<crate::ChannelUnread> for ChannelUnread {
+    fn from(value: crate::ChannelUnread) -> Self {
+        ChannelUnread {
+            id: value.id.into(),
+            last_id: value.last_id,
+            mentions: value.mentions.unwrap_or_default(),
+        }
+    }
+}
+
+impl From<crate::ChannelCompositeKey> for ChannelCompositeKey {
+    fn from(value: crate::ChannelCompositeKey) -> Self {
+        ChannelCompositeKey {
+            channel: value.channel,
+            user: value.user,
+        }
+    }
+}
+
 impl From<crate::Webhook> for Webhook {
     fn from(value: crate::Webhook) -> Self {
         Webhook {
@@ -52,6 +106,7 @@ impl From<crate::Webhook> for Webhook {
             avatar: value.avatar.map(|file| file.into()),
             channel_id: value.channel_id,
             token: value.token,
+            permissions: value.permissions,
         }
     }
 }
@@ -64,6 +119,7 @@ impl From<crate::PartialWebhook> for PartialWebhook {
             avatar: value.avatar.map(|file| file.into()),
             channel_id: value.channel_id,
             token: value.token,
+            permissions: value.permissions,
         }
     }
 }
@@ -197,6 +253,28 @@ impl From<crate::FieldsChannel> for FieldsChannel {
     }
 }
 
+impl From<crate::Emoji> for Emoji {
+    fn from(value: crate::Emoji) -> Self {
+        Emoji {
+            id: value.id,
+            parent: value.parent.into(),
+            creator_id: value.creator_id,
+            name: value.name,
+            animated: value.animated,
+            nsfw: value.nsfw,
+        }
+    }
+}
+
+impl From<crate::EmojiParent> for EmojiParent {
+    fn from(value: crate::EmojiParent) -> Self {
+        match value {
+            crate::EmojiParent::Detached => EmojiParent::Detached,
+            crate::EmojiParent::Server { id } => EmojiParent::Server { id },
+        }
+    }
+}
+
 impl From<crate::File> for File {
     fn from(value: crate::File) -> Self {
         File {
@@ -234,19 +312,340 @@ impl From<crate::Metadata> for Metadata {
     }
 }
 
+impl From<crate::Message> for Message {
+    fn from(value: crate::Message) -> Self {
+        Message {
+            id: value.id,
+            nonce: value.nonce,
+            channel: value.channel,
+            author: value.author,
+            webhook: value.webhook,
+            content: value.content,
+            system: value.system.map(|system| system.into()),
+            attachments: value
+                .attachments
+                .map(|v| v.into_iter().map(|f| f.into()).collect()),
+            edited: value.edited,
+            embeds: value.embeds,
+            mentions: value.mentions,
+            replies: value.replies,
+            reactions: value
+                .reactions
+                .into_iter()
+                .map(|(k, v)| (k, v.into_iter().collect()))
+                .collect(),
+            interactions: value.interactions.into(),
+            masquerade: value.masquerade.map(|masq| masq.into()),
+        }
+    }
+}
+
+impl From<crate::PartialMessage> for PartialMessage {
+    fn from(value: crate::PartialMessage) -> Self {
+        PartialMessage {
+            id: value.id,
+            nonce: value.nonce,
+            channel: value.channel,
+            author: value.author,
+            webhook: value.webhook,
+            content: value.content,
+            system: value.system.map(|system| system.into()),
+            attachments: value
+                .attachments
+                .map(|v| v.into_iter().map(|f| f.into()).collect()),
+            edited: value.edited,
+            embeds: value.embeds,
+            mentions: value.mentions,
+            replies: value.replies,
+            reactions: value.reactions.map(|reactions| {
+                reactions
+                    .into_iter()
+                    .map(|(k, v)| (k, v.into_iter().collect()))
+                    .collect()
+            }),
+            interactions: value.interactions.map(|interactions| interactions.into()),
+            masquerade: value.masquerade.map(|masq| masq.into()),
+        }
+    }
+}
+
+impl From<crate::SystemMessage> for SystemMessage {
+    fn from(value: crate::SystemMessage) -> Self {
+        match value {
+            crate::SystemMessage::ChannelDescriptionChanged { by } => {
+                Self::ChannelDescriptionChanged { by }
+            }
+            crate::SystemMessage::ChannelIconChanged { by } => Self::ChannelIconChanged { by },
+            crate::SystemMessage::ChannelOwnershipChanged { from, to } => {
+                Self::ChannelOwnershipChanged { from, to }
+            }
+            crate::SystemMessage::ChannelRenamed { name, by } => Self::ChannelRenamed { name, by },
+            crate::SystemMessage::Text { content } => Self::Text { content },
+            crate::SystemMessage::UserAdded { id, by } => Self::UserAdded { id, by },
+            crate::SystemMessage::UserBanned { id } => Self::UserBanned { id },
+            crate::SystemMessage::UserJoined { id } => Self::UserJoined { id },
+            crate::SystemMessage::UserKicked { id } => Self::UserKicked { id },
+            crate::SystemMessage::UserLeft { id } => Self::UserLeft { id },
+            crate::SystemMessage::UserRemove { id, by } => Self::UserRemove { id, by },
+        }
+    }
+}
+
+impl From<crate::Interactions> for Interactions {
+    fn from(value: crate::Interactions) -> Self {
+        Interactions {
+            reactions: value
+                .reactions
+                .map(|reactions| reactions.into_iter().collect()),
+            restrict_reactions: value.restrict_reactions,
+        }
+    }
+}
+
+impl From<Interactions> for crate::Interactions {
+    fn from(value: Interactions) -> Self {
+        crate::Interactions {
+            reactions: value
+                .reactions
+                .map(|reactions| reactions.into_iter().collect()),
+            restrict_reactions: value.restrict_reactions,
+        }
+    }
+}
+
+impl From<crate::AppendMessage> for AppendMessage {
+    fn from(value: crate::AppendMessage) -> Self {
+        AppendMessage {
+            embeds: value.embeds,
+        }
+    }
+}
+
+impl From<crate::Masquerade> for Masquerade {
+    fn from(value: crate::Masquerade) -> Self {
+        Masquerade {
+            name: value.name,
+            avatar: value.avatar,
+            colour: value.colour,
+        }
+    }
+}
+
+impl From<Masquerade> for crate::Masquerade {
+    fn from(value: Masquerade) -> Self {
+        crate::Masquerade {
+            name: value.name,
+            avatar: value.avatar,
+            colour: value.colour,
+        }
+    }
+}
+
+impl From<crate::ServerBan> for ServerBan {
+    fn from(value: crate::ServerBan) -> Self {
+        ServerBan {
+            id: value.id.into(),
+            reason: value.reason,
+        }
+    }
+}
+
+impl From<crate::Member> for Member {
+    fn from(value: crate::Member) -> Self {
+        Member {
+            id: value.id.into(),
+            joined_at: value.joined_at,
+            nickname: value.nickname,
+            avatar: value.avatar.map(|f| f.into()),
+            roles: value.roles,
+            timeout: value.timeout,
+        }
+    }
+}
+
+impl From<crate::PartialMember> for PartialMember {
+    fn from(value: crate::PartialMember) -> Self {
+        PartialMember {
+            id: value.id.map(|id| id.into()),
+            joined_at: value.joined_at,
+            nickname: value.nickname,
+            avatar: value.avatar.map(|f| f.into()),
+            roles: value.roles,
+            timeout: value.timeout,
+        }
+    }
+}
+
+impl From<crate::MemberCompositeKey> for MemberCompositeKey {
+    fn from(value: crate::MemberCompositeKey) -> Self {
+        MemberCompositeKey {
+            server: value.server,
+            user: value.user,
+        }
+    }
+}
+
+impl From<crate::FieldsMember> for FieldsMember {
+    fn from(value: crate::FieldsMember) -> Self {
+        match value {
+            crate::FieldsMember::Avatar => FieldsMember::Avatar,
+            crate::FieldsMember::Nickname => FieldsMember::Nickname,
+            crate::FieldsMember::Roles => FieldsMember::Roles,
+            crate::FieldsMember::Timeout => FieldsMember::Timeout,
+        }
+    }
+}
+
+impl From<crate::RemovalIntention> for RemovalIntention {
+    fn from(value: crate::RemovalIntention) -> Self {
+        match value {
+            crate::RemovalIntention::Ban => RemovalIntention::Ban,
+            crate::RemovalIntention::Kick => RemovalIntention::Kick,
+            crate::RemovalIntention::Leave => RemovalIntention::Leave,
+        }
+    }
+}
+
+impl From<crate::Server> for Server {
+    fn from(value: crate::Server) -> Self {
+        Server {
+            id: value.id,
+            owner: value.owner,
+            name: value.name,
+            description: value.description,
+            channels: value.channels,
+            categories: value
+                .categories
+                .map(|categories| categories.into_iter().map(|v| v.into()).collect()),
+            system_messages: value.system_messages.map(|v| v.into()),
+            roles: value
+                .roles
+                .into_iter()
+                .map(|(k, v)| (k, v.into()))
+                .collect(),
+            default_permissions: value.default_permissions,
+            icon: value.icon.map(|f| f.into()),
+            banner: value.banner.map(|f| f.into()),
+            flags: value.flags.unwrap_or_default() as u32,
+            nsfw: value.nsfw,
+            analytics: value.analytics,
+            discoverable: value.discoverable,
+        }
+    }
+}
+
+impl From<crate::PartialServer> for PartialServer {
+    fn from(value: crate::PartialServer) -> Self {
+        PartialServer {
+            id: value.id,
+            owner: value.owner,
+            name: value.name,
+            description: value.description,
+            channels: value.channels,
+            categories: value
+                .categories
+                .map(|categories| categories.into_iter().map(|v| v.into()).collect()),
+            system_messages: value.system_messages.map(|v| v.into()),
+            roles: value
+                .roles
+                .map(|roles| roles.into_iter().map(|(k, v)| (k, v.into())).collect()),
+            default_permissions: value.default_permissions,
+            icon: value.icon.map(|f| f.into()),
+            banner: value.banner.map(|f| f.into()),
+            flags: value.flags.map(|v| v as u32),
+            nsfw: value.nsfw,
+            analytics: value.analytics,
+            discoverable: value.discoverable,
+        }
+    }
+}
+
+impl From<crate::FieldsServer> for FieldsServer {
+    fn from(value: crate::FieldsServer) -> Self {
+        match value {
+            crate::FieldsServer::Banner => FieldsServer::Banner,
+            crate::FieldsServer::Categories => FieldsServer::Categories,
+            crate::FieldsServer::Description => FieldsServer::Description,
+            crate::FieldsServer::Icon => FieldsServer::Icon,
+            crate::FieldsServer::SystemMessages => FieldsServer::SystemMessages,
+        }
+    }
+}
+
+impl From<crate::Category> for Category {
+    fn from(value: crate::Category) -> Self {
+        Category {
+            id: value.id,
+            title: value.title,
+            channels: value.channels,
+        }
+    }
+}
+
+impl From<crate::SystemMessageChannels> for SystemMessageChannels {
+    fn from(value: crate::SystemMessageChannels) -> Self {
+        SystemMessageChannels {
+            user_joined: value.user_joined,
+            user_left: value.user_left,
+            user_kicked: value.user_kicked,
+            user_banned: value.user_banned,
+        }
+    }
+}
+
+impl From<crate::Role> for Role {
+    fn from(value: crate::Role) -> Self {
+        Role {
+            name: value.name,
+            permissions: value.permissions,
+            colour: value.colour,
+            hoist: value.hoist,
+            rank: value.rank,
+        }
+    }
+}
+
+impl From<crate::PartialRole> for PartialRole {
+    fn from(value: crate::PartialRole) -> Self {
+        PartialRole {
+            name: value.name,
+            permissions: value.permissions,
+            colour: value.colour,
+            hoist: value.hoist,
+            rank: value.rank,
+        }
+    }
+}
+
+impl From<crate::FieldsRole> for FieldsRole {
+    fn from(value: crate::FieldsRole) -> Self {
+        match value {
+            crate::FieldsRole::Colour => FieldsRole::Colour,
+        }
+    }
+}
+
 impl crate::User {
-    pub async fn into<P>(self, perspective: P) -> User
+    pub async fn into<'a, P>(self, perspective: P) -> User
     where
-        P: Into<Option<crate::User>>,
+        P: Into<Option<&'a crate::User>>,
     {
         let relationship = if let Some(perspective) = perspective.into() {
-            perspective
+            if perspective.id == self.id {
-                .relations
+                RelationshipStatus::User
-                .unwrap_or_default()
+            } else {
-                .into_iter()
+                perspective
-                .find(|relationship| relationship.id == self.id)
+                    .relations
-                .map(|relationship| relationship.status.into())
+                    .as_ref()
-                .unwrap_or_default()
+                    .map(|relations| {
+                        relations
+                            .iter()
+                            .find(|relationship| relationship.id == self.id)
+                            .map(|relationship| relationship.status.clone().into())
+                            .unwrap_or_default()
+                    })
+                    .unwrap_or_default()
+            }
         } else {
             RelationshipStatus::None
         };
@@ -272,6 +671,83 @@ impl crate::User {
             id: self.id,
         }
     }
+
+    pub async fn into_self(self) -> User {
+        User {
+            username: self.username,
+            discriminator: self.discriminator,
+            display_name: self.display_name,
+            avatar: self.avatar.map(|file| file.into()),
+            relations: self
+                .relations
+                .map(|relationships| {
+                    relationships
+                        .into_iter()
+                        .map(|relationship| relationship.into())
+                        .collect()
+                })
+                .unwrap_or_default(),
+            badges: self.badges.unwrap_or_default() as u32,
+            status: self.status.map(|status| status.into()),
+            profile: self.profile.map(|profile| profile.into()),
+            flags: self.flags.unwrap_or_default() as u32,
+            privileged: self.privileged,
+            bot: self.bot.map(|bot| bot.into()),
+            relationship: RelationshipStatus::User,
+            online: revolt_presence::is_online(&self.id).await,
+            id: self.id,
+        }
+    }
+}
+
+impl From<crate::PartialUser> for PartialUser {
+    fn from(value: crate::PartialUser) -> Self {
+        PartialUser {
+            username: value.username,
+            discriminator: value.discriminator,
+            display_name: value.display_name,
+            avatar: value.avatar.map(|file| file.into()),
+            relations: value.relations.map(|relationships| {
+                relationships
+                    .into_iter()
+                    .map(|relationship| relationship.into())
+                    .collect()
+            }),
+            badges: value.badges.map(|badges| badges as u32),
+            status: value.status.map(|status| status.into()),
+            profile: value.profile.map(|profile| profile.into()),
+            flags: value.flags.map(|flags| flags as u32),
+            privileged: value.privileged,
+            bot: value.bot.map(|bot| bot.into()),
+            relationship: None,
+            online: None,
+            id: value.id,
+        }
+    }
+}
+
+impl From<FieldsUser> for crate::FieldsUser {
+    fn from(value: FieldsUser) -> Self {
+        match value {
+            FieldsUser::Avatar => crate::FieldsUser::Avatar,
+            FieldsUser::ProfileBackground => crate::FieldsUser::ProfileBackground,
+            FieldsUser::ProfileContent => crate::FieldsUser::ProfileContent,
+            FieldsUser::StatusPresence => crate::FieldsUser::StatusPresence,
+            FieldsUser::StatusText => crate::FieldsUser::StatusText,
+        }
+    }
+}
+
+impl From<crate::FieldsUser> for FieldsUser {
+    fn from(value: crate::FieldsUser) -> Self {
+        match value {
+            crate::FieldsUser::Avatar => FieldsUser::Avatar,
+            crate::FieldsUser::ProfileBackground => FieldsUser::ProfileBackground,
+            crate::FieldsUser::ProfileContent => FieldsUser::ProfileContent,
+            crate::FieldsUser::StatusPresence => FieldsUser::StatusPresence,
+            crate::FieldsUser::StatusText => FieldsUser::StatusText,
+        }
+    }
 }
 
 impl From<crate::RelationshipStatus> for RelationshipStatus {

crates/core/database/src/util/idempotency.rs

@@ -1,23 +1,18 @@
-use crate::{Error, Result};
+use std::num::NonZeroUsize;
+
+use revolt_result::{create_error, Error, Result};
 
 use async_std::sync::Mutex;
-use revolt_rocket_okapi::gen::OpenApiGenerator;
-use revolt_rocket_okapi::request::{OpenApiFromRequest, RequestHeaderInput};
-use revolt_rocket_okapi::revolt_okapi::openapi3::{Parameter, ParameterValue};
-use rocket::http::Status;
-use rocket::request::{FromRequest, Outcome};
-use schemars::schema::{InstanceType, SchemaObject, SingleOrVec};
-use serde::{Deserialize, Serialize};
-use validator::Validate;
 use once_cell::sync::Lazy;
+use serde::{Deserialize, Serialize};
 
-#[derive(Validate, Serialize, Deserialize)]
+#[derive(Serialize, Deserialize)]
 pub struct IdempotencyKey {
-    #[validate(length(min = 1, max = 64))]
     key: String,
 }
 
-static TOKEN_CACHE: Lazy<Mutex<lru::LruCache<String, ()>>> = Lazy::new(|| Mutex::new(lru::LruCache::new(100)));
+static TOKEN_CACHE: Lazy<Mutex<lru::LruCache<String, ()>>> =
+    Lazy::new(|| Mutex::new(lru::LruCache::new(NonZeroUsize::new(1000).unwrap())));
 
 impl IdempotencyKey {
     // Backwards compatibility.
@@ -26,7 +21,7 @@ impl IdempotencyKey {
         if let Some(v) = v {
             let mut cache = TOKEN_CACHE.lock().await;
             if cache.get(&v).is_some() {
-                return Err(Error::DuplicateNonce);
+                return Err(create_error!(DuplicateNonce));
             }
 
             cache.put(v.clone(), ());
@@ -41,6 +36,17 @@ impl IdempotencyKey {
     }
 }
 
+#[cfg(feature = "rocket-impl")]
+use revolt_rocket_okapi::{
+    gen::OpenApiGenerator,
+    request::{OpenApiFromRequest, RequestHeaderInput},
+    revolt_okapi::openapi3::{Parameter, ParameterValue},
+};
+
+#[cfg(feature = "rocket-impl")]
+use schemars::schema::{InstanceType, SchemaObject, SingleOrVec};
+
+#[cfg(feature = "rocket-impl")]
 impl<'r> OpenApiFromRequest<'r> for IdempotencyKey {
     fn from_request_input(
         _gen: &mut OpenApiGenerator,
@@ -70,6 +76,13 @@ impl<'r> OpenApiFromRequest<'r> for IdempotencyKey {
     }
 }
 
+#[cfg(feature = "rocket-impl")]
+use rocket::{
+    http::Status,
+    request::{FromRequest, Outcome},
+};
+
+#[cfg(feature = "rocket-impl")]
 #[async_trait]
 impl<'r> FromRequest<'r> for IdempotencyKey {
     type Error = Error;
@@ -81,14 +94,19 @@ impl<'r> FromRequest<'r> for IdempotencyKey {
             .next()
             .map(|k| k.to_string())
         {
-            let idempotency = IdempotencyKey { key };
+            if key.len() > 64 {
-            if let Err(error) = idempotency.validate() {
+                return Outcome::Failure((
-                return Outcome::Failure((Status::BadRequest, Error::FailedValidation { error }));
+                    Status::BadRequest,
+                    create_error!(FailedValidation {
+                        error: "idempotency key too long".to_string(),
+                    }),
+                ));
             }
 
+            let idempotency = IdempotencyKey { key };
             let mut cache = TOKEN_CACHE.lock().await;
             if cache.get(&idempotency.key).is_some() {
-                return Outcome::Failure((Status::Conflict, Error::DuplicateNonce));
+                return Outcome::Failure((Status::Conflict, create_error!(DuplicateNonce)));
             }
 
             cache.put(idempotency.key.clone(), ());

crates/core/database/src/util/mod.rs

@@ -1,3 +1,4 @@
 pub mod bridge;
+pub mod idempotency;
 pub mod permissions;
 pub mod reference;

crates/core/database/src/util/permissions.rs

@@ -4,18 +4,19 @@ use revolt_permissions::{
     calculate_user_permissions, ChannelType, Override, PermissionQuery, RelationshipStatus,
 };
 
-use crate::{Database, User};
+use crate::{Channel, Database, Member, Server, User};
 
 /// Permissions calculator
-pub struct PermissionCalculator<'a> {
+#[derive(Clone)]
+pub struct DatabasePermissionQuery<'a> {
     #[allow(dead_code)]
     database: &'a Database,
 
     perspective: &'a User,
     user: Option<Cow<'a, User>>,
-    // pub channel: Cow<'a, Channel>,
+    channel: Option<Cow<'a, Channel>>,
-    // pub server: Cow<'a, Server>,
+    server: Option<Cow<'a, Server>>,
-    // pub member: Cow<'a, Member>,
+    member: Option<Cow<'a, Member>>,
 
     // flag_known_relationship: Option<&'a RelationshipStatus>,
     cached_user_permission: Option<u32>,
@@ -23,7 +24,7 @@ pub struct PermissionCalculator<'a> {
 }
 
 #[async_trait]
-impl PermissionQuery for PermissionCalculator<'_> {
+impl PermissionQuery for DatabasePermissionQuery<'_> {
     // * For calculating user permission
 
     /// Is our perspective user privileged?
@@ -81,85 +82,275 @@ impl PermissionQuery for PermissionCalculator<'_> {
 
     /// Do we have a mutual connection with the currently selected user?
     async fn have_mutual_connection(&mut self) -> bool {
-        // TODO: User::has_mutual_connection
+        if let Some(user) = &self.user {
-        false
+            // TODO: cache result?
+            matches!(
+                self.perspective
+                    .has_mutual_connection(self.database, &user.id)
+                    .await,
+                Ok(true)
+            )
+        } else {
+            false
+        }
     }
 
     // * For calculating server permission
 
     /// Is our perspective user the server's owner?
     async fn are_we_server_owner(&mut self) -> bool {
-        todo!()
+        if let Some(server) = &self.server {
+            server.owner == self.perspective.id
+        } else {
+            false
+        }
     }
 
     /// Is our perspective user a member of the server?
     async fn are_we_a_member(&mut self) -> bool {
-        todo!()
+        if let Some(server) = &self.server {
+            if self.member.is_some() {
+                true
+            } else {
+                self.database
+                    .fetch_member(&server.id, &self.perspective.id)
+                    .await
+                    .is_ok()
+            }
+        } else {
+            false
+        }
     }
 
     /// Get default server permission
     async fn get_default_server_permissions(&mut self) -> u64 {
-        todo!()
+        if let Some(server) = &self.server {
+            server.default_permissions as u64
+        } else {
+            0
+        }
     }
 
     /// Get the ordered role overrides (from lowest to highest) for this member in this server
     async fn get_our_server_role_overrides(&mut self) -> Vec<Override> {
-        todo!()
+        if let Some(server) = &self.server {
+            let member_roles = self
+                .member
+                .as_ref()
+                .map(|member| member.roles.clone())
+                .unwrap_or_default();
+
+            let mut roles = server
+                .roles
+                .iter()
+                .filter(|(id, _)| member_roles.contains(id))
+                .map(|(_, role)| {
+                    let v: Override = role.permissions.into();
+                    (role.rank, v)
+                })
+                .collect::<Vec<(i64, Override)>>();
+
+            roles.sort_by(|a, b| b.0.cmp(&a.0));
+            roles.into_iter().map(|(_, v)| v).collect()
+        } else {
+            vec![]
+        }
     }
 
     /// Is our perspective user timed out on this server?
     async fn are_we_timed_out(&mut self) -> bool {
-        todo!()
+        if let Some(member) = &self.member {
+            member.in_timeout()
+        } else {
+            false
+        }
     }
 
     // * For calculating channel permission
 
     /// Get the type of the channel
     async fn get_channel_type(&mut self) -> ChannelType {
-        todo!()
+        if let Some(channel) = &self.channel {
+            match channel {
+                Cow::Borrowed(Channel::DirectMessage { .. })
+                | Cow::Owned(Channel::DirectMessage { .. }) => ChannelType::DirectMessage,
+                Cow::Borrowed(Channel::Group { .. }) | Cow::Owned(Channel::Group { .. }) => {
+                    ChannelType::Group
+                }
+                Cow::Borrowed(Channel::SavedMessages { .. })
+                | Cow::Owned(Channel::SavedMessages { .. }) => ChannelType::SavedMessages,
+                Cow::Borrowed(Channel::TextChannel { .. })
+                | Cow::Owned(Channel::TextChannel { .. })
+                | Cow::Borrowed(Channel::VoiceChannel { .. })
+                | Cow::Owned(Channel::VoiceChannel { .. }) => ChannelType::ServerChannel,
+            }
+        } else {
+            ChannelType::Unknown
+        }
     }
 
     /// Get the default channel permissions
     /// Group channel defaults should be mapped to an allow-only override
     async fn get_default_channel_permissions(&mut self) -> Override {
-        todo!()
+        if let Some(channel) = &self.channel {
+            match channel {
+                Cow::Borrowed(Channel::Group { permissions, .. })
+                | Cow::Owned(Channel::Group { permissions, .. }) => Override {
+                    allow: permissions.unwrap_or_default() as u64,
+                    deny: 0,
+                },
+                Cow::Borrowed(Channel::TextChannel {
+                    default_permissions,
+                    ..
+                })
+                | Cow::Owned(Channel::TextChannel {
+                    default_permissions,
+                    ..
+                })
+                | Cow::Borrowed(Channel::VoiceChannel {
+                    default_permissions,
+                    ..
+                })
+                | Cow::Owned(Channel::VoiceChannel {
+                    default_permissions,
+                    ..
+                }) => default_permissions.unwrap_or_default().into(),
+                _ => Default::default(),
+            }
+        } else {
+            Default::default()
+        }
     }
 
     /// Get the ordered role overrides (from lowest to highest) for this member in this channel
     async fn get_our_channel_role_overrides(&mut self) -> Vec<Override> {
-        todo!()
+        if let Some(channel) = &self.channel {
+            match channel {
+                Cow::Borrowed(Channel::TextChannel {
+                    role_permissions, ..
+                })
+                | Cow::Owned(Channel::TextChannel {
+                    role_permissions, ..
+                })
+                | Cow::Borrowed(Channel::VoiceChannel {
+                    role_permissions, ..
+                })
+                | Cow::Owned(Channel::VoiceChannel {
+                    role_permissions, ..
+                }) => {
+                    if let Some(server) = &self.server {
+                        let member_roles = self
+                            .member
+                            .as_ref()
+                            .map(|member| member.roles.clone())
+                            .unwrap_or_default();
+
+                        let mut roles = role_permissions
+                            .iter()
+                            .filter(|(id, _)| member_roles.contains(id))
+                            .filter_map(|(id, permission)| {
+                                server.roles.get(id).map(|role| {
+                                    let v: Override = (*permission).into();
+                                    (role.rank, v)
+                                })
+                            })
+                            .collect::<Vec<(i64, Override)>>();
+
+                        roles.sort_by(|a, b| b.0.cmp(&a.0));
+                        roles.into_iter().map(|(_, v)| v).collect()
+                    } else {
+                        vec![]
+                    }
+                }
+                _ => vec![],
+            }
+        } else {
+            vec![]
+        }
     }
 
     /// Do we own this group or saved messages channel if it is one of those?
     async fn do_we_own_the_channel(&mut self) -> bool {
-        todo!()
+        if let Some(channel) = &self.channel {
+            match channel {
+                Cow::Borrowed(Channel::Group { owner, .. })
+                | Cow::Owned(Channel::Group { owner, .. }) => owner == &self.perspective.id,
+                Cow::Borrowed(Channel::SavedMessages { user, .. })
+                | Cow::Owned(Channel::SavedMessages { user, .. }) => user == &self.perspective.id,
+                _ => false,
+            }
+        } else {
+            false
+        }
     }
 
     /// Are we a recipient of this channel?
     async fn are_we_part_of_the_channel(&mut self) -> bool {
-        todo!()
+        if let Some(channel) = &self.channel {
+            match channel {
+                Cow::Borrowed(Channel::DirectMessage { recipients, .. })
+                | Cow::Owned(Channel::DirectMessage { recipients, .. })
+                | Cow::Borrowed(Channel::Group { recipients, .. })
+                | Cow::Owned(Channel::Group { recipients, .. }) => {
+                    recipients.contains(&self.perspective.id)
+                }
+                _ => false,
+            }
+        } else {
+            false
+        }
     }
 
     /// Set the current user as the recipient of this channel
     /// (this will only ever be called for DirectMessage channels, use unimplemented!() for other code paths)
     async fn set_recipient_as_user(&mut self) {
-        todo!()
+        if let Some(channel) = &self.channel {
+            match channel {
+                Cow::Borrowed(Channel::DirectMessage { recipients, .. })
+                | Cow::Owned(Channel::DirectMessage { recipients, .. }) => {
+                    let recipient_id = recipients
+                        .iter()
+                        .find(|recipient| recipient != &&self.perspective.id)
+                        .expect("Missing recipient for DM");
+
+                    if let Ok(user) = self.database.fetch_user(recipient_id).await {
+                        self.user.replace(Cow::Owned(user));
+                    }
+                }
+                _ => unimplemented!(),
+            }
+        }
     }
 
     /// Set the current server as the server owning this channel
     /// (this will only ever be called for server channels, use unimplemented!() for other code paths)
     async fn set_server_from_channel(&mut self) {
-        todo!()
+        if let Some(channel) = &self.channel {
+            match channel {
+                Cow::Borrowed(Channel::TextChannel { server, .. })
+                | Cow::Owned(Channel::TextChannel { server, .. })
+                | Cow::Borrowed(Channel::VoiceChannel { server, .. })
+                | Cow::Owned(Channel::VoiceChannel { server, .. }) => {
+                    if let Ok(server) = self.database.fetch_server(server).await {
+                        self.server.replace(Cow::Owned(server));
+                    }
+                }
+                _ => unimplemented!(),
+            }
+        }
     }
 }
 
-impl<'a> PermissionCalculator<'a> {
+impl<'a> DatabasePermissionQuery<'a> {
     /// Create a new permission calculator
-    pub fn new(database: &'a Database, perspective: &'a User) -> PermissionCalculator<'a> {
+    pub fn new(database: &'a Database, perspective: &'a User) -> DatabasePermissionQuery<'a> {
-        PermissionCalculator {
+        DatabasePermissionQuery {
             database,
             perspective,
             user: None,
+            channel: None,
+            server: None,
+            member: None,
 
             cached_user_permission: None,
             cached_permission: None,
@@ -167,7 +358,7 @@ impl<'a> PermissionCalculator<'a> {
     }
 
     /// Calculate the user permission value
-    pub async fn calc_user(mut self) -> PermissionCalculator<'a> {
+    pub async fn calc_user(mut self) -> DatabasePermissionQuery<'a> {
         if self.cached_user_permission.is_some() {
             return self;
         }
@@ -176,14 +367,14 @@ impl<'a> PermissionCalculator<'a> {
             panic!("Expected `PermissionCalculator.user to exist.");
         }
 
-        PermissionCalculator {
+        DatabasePermissionQuery {
             cached_user_permission: Some(calculate_user_permissions(&mut self).await),
             ..self
         }
     }
 
     /// Calculate the permission value
-    pub async fn calc(self) -> PermissionCalculator<'a> {
+    pub async fn calc(self) -> DatabasePermissionQuery<'a> {
         if self.cached_permission.is_some() {
             return self;
         }
@@ -192,15 +383,39 @@ impl<'a> PermissionCalculator<'a> {
     }
 
     /// Use user
-    pub fn user(self, user: Cow<'a, User>) -> PermissionCalculator {
+    pub fn user(self, user: &'a User) -> DatabasePermissionQuery {
-        PermissionCalculator {
+        DatabasePermissionQuery {
-            user: Some(user),
+            user: Some(Cow::Borrowed(user)),
+            ..self
+        }
+    }
+
+    /// Use channel
+    pub fn channel(self, channel: &'a Channel) -> DatabasePermissionQuery {
+        DatabasePermissionQuery {
+            channel: Some(Cow::Borrowed(channel)),
+            ..self
+        }
+    }
+
+    /// Use server
+    pub fn server(self, server: &'a Server) -> DatabasePermissionQuery {
+        DatabasePermissionQuery {
+            server: Some(Cow::Borrowed(server)),
+            ..self
+        }
+    }
+
+    /// Use member
+    pub fn member(self, member: &'a Member) -> DatabasePermissionQuery {
+        DatabasePermissionQuery {
+            member: Some(Cow::Borrowed(member)),
             ..self
         }
     }
 }
 
 /// Short-hand for creating a permission calculator
-pub fn perms<'a>(database: &'a Database, perspective: &'a User) -> PermissionCalculator<'a> {
+pub fn perms<'a>(database: &'a Database, perspective: &'a User) -> DatabasePermissionQuery<'a> {
-    PermissionCalculator::new(database, perspective)
+    DatabasePermissionQuery::new(database, perspective)
 }

crates/core/database/src/util/reference.rs

@@ -7,7 +7,7 @@ use schemars::{
     JsonSchema,
 };
 
-use crate::{Bot, Database, Webhook};
+use crate::{Bot, Channel, Database, Webhook};
 
 /// Reference to some object in the database
 #[derive(Serialize, Deserialize)]
@@ -27,6 +27,11 @@ impl Reference {
         db.fetch_bot(&self.id).await
     }
 
+    /// Fetch channel from Ref
+    pub async fn as_channel(&self, db: &Database) -> Result<Channel> {
+        db.fetch_channel(&self.id).await
+    }
+
     /// Fetch webhook from Ref
     pub async fn as_webhook(&self, db: &Database) -> Result<Webhook> {
         db.fetch_webhook(&self.id).await

crates/core/models/Cargo.toml

@@ -1,28 +1,35 @@
 [package]
 name = "revolt-models"
-version = "0.6.1"
+version = "0.6.8"
 edition = "2021"
 license = "AGPL-3.0-or-later"
-authors = [ "Paul Makles <me@insrt.uk>" ]
+authors = ["Paul Makles <me@insrt.uk>"]
 description = "Revolt Backend: API Models"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [features]
-serde = [ "dep:serde", "revolt-permissions/serde" ]
+serde = ["dep:serde", "revolt-permissions/serde", "indexmap/serde"]
-schemas = [ "dep:schemars", "revolt-permissions/schemas" ]
+schemas = ["dep:schemars", "revolt-permissions/schemas"]
-validator = [ "dep:validator" ]
+validator = ["dep:validator"]
-partials = [ "dep:revolt_optional_struct", "serde", "schemas" ]
+partials = ["dep:revolt_optional_struct", "serde", "schemas"]
 
-default = [ "serde", "partials" ]
+default = ["serde", "partials"]
 
 [dependencies]
 # Core
-revolt-permissions = { version = "0.6.1", path = "../permissions" }
+revolt-config = { version = "0.6.8", path = "../config" }
+revolt-permissions = { version = "0.6.8", path = "../permissions" }
+
+# Utility
+regex = "1"
+indexmap = "1.9.3"
+once_cell = "1.17.1"
 
 # Serialisation
 revolt_optional_struct = { version = "0.2.0", optional = true }
 serde = { version = "1", features = ["derive"], optional = true }
+iso8601-timestamp = { version = "0.2.11", features = ["schema", "bson"] }
 
 # Spec Generation
 schemars = { version = "0.8.8", optional = true }

crates/core/models/src/v0/account_strikes.rs

@@ -1,28 +0,0 @@
-auto_derived!(
-    /// Account Strike
-    pub struct AccountStrike {
-        /// Strike Id
-        #[cfg_attr(feature = "serde", serde(rename = "_id"))]
-        pub id: String,
-        /// Id of reported user
-        pub user_id: String,
-
-        /// Attached reason
-        pub reason: String,
-    }
-
-    /// New strike information
-    pub struct DataCreateStrike {
-        /// Id of reported user
-        pub user_id: String,
-
-        /// Attached reason
-        pub reason: String,
-    }
-
-    /// New strike information
-    pub struct DataEditAccountStrike {
-        /// New attached reason
-        pub reason: String,
-    }
-);

crates/core/models/src/v0/bots.rs

@@ -2,6 +2,7 @@ use super::User;
 
 auto_derived!(
     /// Bot
+    #[derive(Default)]
     pub struct Bot {
         /// Bot Id
         #[cfg_attr(feature = "serde", serde(rename = "_id"))]
@@ -55,6 +56,12 @@ auto_derived!(
         pub flags: u32,
     }
 
+    /// Optional fields on bot object
+    pub enum FieldsBot {
+        Token,
+        InteractionsURL,
+    }
+
     /// Flags that may be attributed to a bot
     #[repr(u32)]
     pub enum BotFlags {
@@ -65,16 +72,22 @@ auto_derived!(
     /// Public Bot
     pub struct PublicBot {
         /// Bot Id
-        #[serde(rename = "_id")]
+        #[cfg_attr(feature = "serde", serde(rename = "_id"))]
         pub id: String,
 
         /// Bot Username
         pub username: String,
         /// Profile Avatar
-        #[serde(skip_serializing_if = "String::is_empty")]
+        #[cfg_attr(
+            feature = "serde",
+            serde(skip_serializing_if = "String::is_empty", default)
+        )]
         pub avatar: String,
         /// Profile Description
-        #[serde(skip_serializing_if = "String::is_empty")]
+        #[cfg_attr(
+            feature = "serde",
+            serde(skip_serializing_if = "String::is_empty", default)
+        )]
         pub description: String,
     }
 
@@ -85,4 +98,68 @@ auto_derived!(
         /// User object
         pub user: User,
     }
+
+    /// Bot Details
+    #[derive(Default)]
+    #[cfg_attr(feature = "validator", derive(validator::Validate))]
+    pub struct DataCreateBot {
+        /// Bot username
+        #[cfg_attr(
+            feature = "validator",
+            validate(length(min = 2, max = 32), regex = "super::RE_USERNAME")
+        )]
+        pub name: String,
+    }
+
+    /// New Bot Details
+    #[derive(Default)]
+    #[cfg_attr(feature = "validator", derive(validator::Validate))]
+    pub struct DataEditBot {
+        /// Bot username
+        #[cfg_attr(
+            feature = "validator",
+            validate(length(min = 2, max = 32), regex = "super::RE_USERNAME")
+        )]
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub name: Option<String>,
+        /// Whether the bot can be added by anyone
+        pub public: Option<bool>,
+        /// Whether analytics should be gathered for this bot
+        ///
+        /// Must be enabled in order to show up on [Revolt Discover](https://rvlt.gg).
+        pub analytics: Option<bool>,
+        /// Interactions URL
+        #[cfg_attr(feature = "validator", validate(length(min = 1, max = 2048)))]
+        pub interactions_url: Option<String>,
+        /// Fields to remove from bot object
+        #[cfg_attr(feature = "validator", validate(length(min = 1)))]
+        pub remove: Option<Vec<FieldsBot>>,
+    }
+
+    /// Where we are inviting a bot to
+    #[serde(untagged)]
+    pub enum InviteBotDestination {
+        /// Invite to a server
+        Server {
+            /// Server Id
+            server: String,
+        },
+        /// Invite to a group
+        Group {
+            /// Group Id
+            group: String,
+        },
+    }
+
+    /// Owned Bots Response
+    ///
+    /// Both lists are sorted by their IDs.
+    ///
+    /// TODO: user should be in bot object
+    pub struct OwnedBotsResponse {
+        /// Bot objects
+        pub bots: Vec<Bot>,
+        /// User objects
+        pub users: Vec<User>,
+    }
 );

crates/core/models/src/v0/channel_invites.rs

@@ -0,0 +1,27 @@
+auto_derived!(
+    /// Invite
+    pub enum Invite {
+        /// Invite to a specific server channel
+        Server {
+            /// Invite code
+            #[cfg_attr(feature = "serde", serde(rename = "_id"))]
+            code: String,
+            /// Id of the server this invite points to
+            server: String,
+            /// Id of user who created this invite
+            creator: String,
+            /// Id of the server channel this invite points to
+            channel: String,
+        },
+        /// Invite to a group channel
+        Group {
+            /// Invite code
+            #[cfg_attr(feature = "serde", serde(rename = "_id"))]
+            code: String,
+            /// Id of user who created this invite
+            creator: String,
+            /// Id of the group channel this invite points to
+            channel: String,
+        },
+    }
+);

crates/core/models/src/v0/channel_unreads.rs

@@ -0,0 +1,27 @@
+auto_derived!(
+    /// Channel Unread
+    pub struct ChannelUnread {
+        /// Composite key pointing to a user's view of a channel
+        #[serde(rename = "_id")]
+        pub id: ChannelCompositeKey,
+
+        /// Id of the last message read in this channel by a user
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
+        pub last_id: Option<String>,
+        /// Array of message ids that mention the user
+        #[cfg_attr(
+            feature = "serde",
+            serde(skip_serializing_if = "Vec::is_empty", default)
+        )]
+        pub mentions: Vec<String>,
+    }
+
+    /// Composite primary key consisting of channel and user id
+    #[derive(Hash)]
+    pub struct ChannelCompositeKey {
+        /// Channel Id
+        pub channel: String,
+        /// User Id
+        pub user: String,
+    }
+);

crates/core/models/src/v0/channel_webhooks.rs

@@ -1,3 +1,5 @@
+use validator::Validate;
+
 use super::File;
 
 auto_derived_partial!(
@@ -16,6 +18,9 @@ auto_derived_partial!(
         /// The channel this webhook belongs to
         pub channel_id: String,
 
+        /// The permissions for the webhook
+        pub permissions: u64,
+
         /// The private token for the webhook
         pub token: Option<String>,
     },
@@ -43,6 +48,9 @@ auto_derived!(
         #[cfg_attr(feature = "validator", validate(length(min = 1, max = 128)))]
         pub avatar: Option<String>,
 
+        /// Webhook permissions
+        pub permissions: Option<u64>,
+
         /// Fields to remove from webhook
         #[cfg_attr(feature = "serde", serde(default))]
         pub remove: Vec<FieldsWebhook>,
@@ -61,12 +69,25 @@ auto_derived!(
 
         /// The channel this webhook belongs to
         pub channel_id: String,
+
+        /// The permissions for the webhook
+        pub permissions: u64,
     }
 
     /// Optional fields on webhook object
     pub enum FieldsWebhook {
         Avatar,
     }
+
+    /// Information for the webhook
+    #[derive(Validate)]
+    pub struct CreateWebhookBody {
+        #[validate(length(min = 1, max = 32))]
+        pub name: String,
+
+        #[validate(length(min = 1, max = 128))]
+        pub avatar: Option<String>,
+    }
 );
 
 impl From<Webhook> for MessageWebhook {
@@ -85,6 +106,7 @@ impl From<Webhook> for ResponseWebhook {
             name: value.name,
             avatar: value.avatar.map(|file| file.id),
             channel_id: value.channel_id,
+            permissions: value.permissions,
         }
     }
 }

crates/core/models/src/v0/embeds.rs

@@ -0,0 +1,160 @@
+use super::File;
+
+auto_derived!(
+    /// Image positioning and size
+    pub enum ImageSize {
+        /// Show large preview at the bottom of the embed
+        Large,
+        /// Show small preview to the side of the embed
+        Preview,
+    }
+
+    /// Image
+    pub struct Image {
+        /// URL to the original image
+        pub url: String,
+        /// Width of the image
+        pub width: isize,
+        /// Height of the image
+        pub height: isize,
+        /// Positioning and size
+        pub size: ImageSize,
+    }
+
+    /// Video
+    pub struct Video {
+        /// URL to the original video
+        pub url: String,
+        /// Width of the video
+        pub width: isize,
+        /// Height of the video
+        pub height: isize,
+    }
+
+    /// Type of remote Twitch content
+    pub enum TwitchType {
+        Channel,
+        Video,
+        Clip,
+    }
+
+    /// Type of remote Lightspeed.tv content
+    pub enum LightspeedType {
+        Channel,
+    }
+
+    /// Type of remote Bandcamp content
+    pub enum BandcampType {
+        Album,
+        Track,
+    }
+
+    /// Information about special remote content
+    #[serde(tag = "type")]
+    pub enum Special {
+        /// No remote content
+        None,
+        /// Content hint that this contains a GIF
+        ///
+        /// Use metadata to find video or image to play
+        GIF,
+        /// YouTube video
+        YouTube {
+            id: String,
+
+            #[serde(skip_serializing_if = "Option::is_none")]
+            timestamp: Option<String>,
+        },
+        /// Lightspeed.tv stream
+        Lightspeed {
+            content_type: LightspeedType,
+            id: String,
+        },
+        /// Twitch stream or clip
+        Twitch {
+            content_type: TwitchType,
+            id: String,
+        },
+        /// Spotify track
+        Spotify { content_type: String, id: String },
+        /// Soundcloud track
+        Soundcloud,
+        /// Bandcamp track
+        Bandcamp {
+            content_type: BandcampType,
+            id: String,
+        },
+        /// Streamable Video
+        Streamable { id: String },
+    }
+
+    /// Website metadata
+    pub struct WebsiteMetadata {
+        /// Direct URL to web page
+        #[serde(skip_serializing_if = "Option::is_none")]
+        url: Option<String>,
+        /// Original direct URL
+        #[serde(skip_serializing_if = "Option::is_none")]
+        original_url: Option<String>,
+        /// Remote content
+        #[serde(skip_serializing_if = "Option::is_none")]
+        special: Option<Special>,
+
+        /// Title of website
+        #[serde(skip_serializing_if = "Option::is_none")]
+        title: Option<String>,
+        /// Description of website
+        #[serde(skip_serializing_if = "Option::is_none")]
+        description: Option<String>,
+        /// Embedded image
+        #[serde(skip_serializing_if = "Option::is_none")]
+        image: Option<Image>,
+        /// Embedded video
+        #[serde(skip_serializing_if = "Option::is_none")]
+        video: Option<Video>,
+
+        // #[serde(skip_serializing_if = "Option::is_none")]
+        // opengraph_type: Option<String>,
+        /// Site name
+        #[serde(skip_serializing_if = "Option::is_none")]
+        site_name: Option<String>,
+        /// URL to site icon
+        #[serde(skip_serializing_if = "Option::is_none")]
+        icon_url: Option<String>,
+        /// CSS Colour
+        #[serde(skip_serializing_if = "Option::is_none")]
+        colour: Option<String>,
+    }
+
+    /// Text Embed
+    pub struct Text {
+        /// URL to icon
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub icon_url: Option<String>,
+        /// URL for title
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub url: Option<String>,
+        /// Title of text embed
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub title: Option<String>,
+        /// Description of text embed
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub description: Option<String>,
+        /// ID of uploaded autumn file
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub media: Option<File>,
+        /// CSS Colour
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub colour: Option<String>,
+    }
+
+    /// Embed
+    #[serde(tag = "type")]
+    pub enum Embed {
+        Website(WebsiteMetadata),
+        Image(Image),
+        Video(Video),
+        Text(Text),
+        None,
+    }
+);

crates/core/models/src/v0/emojis.rs

@@ -0,0 +1,33 @@
+auto_derived!(
+    /// Emoji
+    pub struct Emoji {
+        /// Unique Id
+        #[cfg_attr(feature = "serde", serde(rename = "_id"))]
+        pub id: String,
+        /// What owns this emoji
+        pub parent: EmojiParent,
+        /// Uploader user id
+        pub creator_id: String,
+        /// Emoji name
+        pub name: String,
+        /// Whether the emoji is animated
+        #[cfg_attr(
+            feature = "serde",
+            serde(skip_serializing_if = "crate::if_false", default)
+        )]
+        pub animated: bool,
+        /// Whether the emoji is marked as nsfw
+        #[cfg_attr(
+            feature = "serde",
+            serde(skip_serializing_if = "crate::if_false", default)
+        )]
+        pub nsfw: bool,
+    }
+
+    /// Parent Id of the emoji
+    #[serde(tag = "type")]
+    pub enum EmojiParent {
+        Server { id: String },
+        Detached,
+    }
+);

crates/core/models/src/v0/files.rs

@@ -2,7 +2,7 @@ auto_derived!(
     /// File
     pub struct File {
         /// Unique Id
-        #[serde(rename = "_id")]
+        #[cfg_attr(feature = "serde", serde(rename = "_id"))]
         pub id: String,
         /// Tag / bucket this file was uploaded to
         pub tag: String,
@@ -16,29 +16,29 @@ auto_derived!(
         pub size: isize,
 
         /// Whether this file was deleted
-        #[serde(skip_serializing_if = "Option::is_none")]
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
         pub deleted: Option<bool>,
         /// Whether this file was reported
-        #[serde(skip_serializing_if = "Option::is_none")]
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
         pub reported: Option<bool>,
 
         // TODO: migrate this mess to having:
         // - author_id
         // - parent: Parent { Message(id), User(id), etc }
-        #[serde(skip_serializing_if = "Option::is_none")]
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
         pub message_id: Option<String>,
-        #[serde(skip_serializing_if = "Option::is_none")]
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
         pub user_id: Option<String>,
-        #[serde(skip_serializing_if = "Option::is_none")]
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
         pub server_id: Option<String>,
 
         /// Id of the object this file is associated with
-        #[serde(skip_serializing_if = "Option::is_none")]
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
         pub object_id: Option<String>,
     }
 
     /// Metadata associated with a file
-    #[serde(tag = "type")]
+    #[cfg_attr(feature = "serde", serde(tag = "type"))]
     #[derive(Default)]
     pub enum Metadata {
         /// File is just a generic uncategorised file

crates/core/models/src/v0/messages.rs

@@ -0,0 +1,330 @@
+use std::{
+    collections::{HashMap, HashSet},
+    time::SystemTime,
+};
+
+use once_cell::sync::Lazy;
+use regex::Regex;
+use revolt_config::config;
+use validator::Validate;
+
+use iso8601_timestamp::Timestamp;
+
+use super::{Embed, File, MessageWebhook, User, Webhook, RE_COLOUR};
+
+pub static RE_MENTION: Lazy<Regex> =
+    Lazy::new(|| Regex::new(r"<@([0-9A-HJKMNP-TV-Z]{26})>").unwrap());
+
+auto_derived_partial!(
+    /// Message
+    pub struct Message {
+        /// Unique Id
+        #[serde(rename = "_id")]
+        pub id: String,
+        /// Unique value generated by client sending this message
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub nonce: Option<String>,
+        /// Id of the channel this message was sent in
+        pub channel: String,
+        /// Id of the user or webhook that sent this message
+        pub author: String,
+        /// The webhook that sent this message
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub webhook: Option<MessageWebhook>,
+        /// Message content
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub content: Option<String>,
+        /// System message
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub system: Option<SystemMessage>,
+        /// Array of attachments
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub attachments: Option<Vec<File>>,
+        /// Time at which this message was last edited
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub edited: Option<Timestamp>,
+        /// Attached embeds to this message
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub embeds: Option<Vec<Embed>>,
+        /// Array of user ids mentioned in this message
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub mentions: Option<Vec<String>>,
+        /// Array of message ids this message is replying to
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub replies: Option<Vec<String>>,
+        /// Hashmap of emoji IDs to array of user IDs
+        #[serde(skip_serializing_if = "HashMap::is_empty", default)]
+        pub reactions: HashMap<String, HashSet<String>>,
+        /// Information about how this message should be interacted with
+        #[serde(skip_serializing_if = "Interactions::is_default", default)]
+        pub interactions: Interactions,
+        /// Name and / or avatar overrides for this message
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub masquerade: Option<Masquerade>,
+    },
+    "PartialMessage"
+);
+
+auto_derived!(
+    /// System Event
+    #[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 },
+        #[serde(rename = "channel_ownership_changed")]
+        ChannelOwnershipChanged { from: String, to: String },
+    }
+
+    /// Name and / or avatar override information
+    #[derive(Validate)]
+    pub struct Masquerade {
+        // FIXME: missing validation
+        /// Replace the display name shown on this message
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub name: Option<String>,
+        /// Replace the avatar shown on this message (URL to image file)
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub avatar: Option<String>,
+        /// Replace the display role colour shown on this message
+        ///
+        /// Must have `ManageRole` permission to use
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub colour: Option<String>,
+    }
+
+    /// Information to guide interactions on this message
+    #[derive(Default)]
+    pub struct Interactions {
+        /// Reactions which should always appear and be distinct
+        #[serde(skip_serializing_if = "Option::is_none", default)]
+        pub reactions: Option<HashSet<String>>,
+        /// Whether reactions should be restricted to the given list
+        ///
+        /// Can only be set to true if reactions list is of at least length 1
+        #[serde(skip_serializing_if = "crate::if_false", default)]
+        pub restrict_reactions: bool,
+    }
+
+    /// Appended Information
+    pub struct AppendMessage {
+        /// Additional embeds to include in this message
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub embeds: Option<Vec<Embed>>,
+    }
+
+    /// Message Sort
+    ///
+    /// Sort used for retrieving messages
+    #[derive(Default)]
+    pub enum MessageSort {
+        /// Sort by the most relevant messages
+        #[default]
+        Relevance,
+        /// Sort by the newest messages first
+        Latest,
+        /// Sort by the oldest messages first
+        Oldest,
+    }
+
+    /// Push Notification
+    pub struct PushNotification {
+        /// Known author name
+        pub author: String,
+        /// URL to author avatar
+        pub icon: String,
+        /// URL to first matching attachment
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub image: Option<String>,
+        /// Message content or system message information
+        pub body: String,
+        /// Unique tag, usually the channel ID
+        pub tag: String,
+        /// Timestamp at which this notification was created
+        pub timestamp: u64,
+        /// URL to open when clicking notification
+        pub url: String,
+    }
+
+    /// Representation of a text embed before it is sent.
+    #[derive(Default, Validate)]
+    pub struct SendableEmbed {
+        #[validate(length(min = 1, max = 128))]
+        pub icon_url: Option<String>,
+        #[validate(length(min = 1, max = 256))]
+        pub url: Option<String>,
+        #[validate(length(min = 1, max = 100))]
+        pub title: Option<String>,
+        #[validate(length(min = 1, max = 2000))]
+        pub description: Option<String>,
+        pub media: Option<String>,
+        #[validate(length(min = 1, max = 128), regex = "RE_COLOUR")]
+        pub colour: Option<String>,
+    }
+
+    /// What this message should reply to and how
+    pub struct ReplyIntent {
+        /// Message Id
+        pub id: String,
+        /// Whether this reply should mention the message's author
+        pub mention: bool,
+    }
+
+    /// Message to send
+    #[derive(Validate)]
+    pub struct DataMessageSend {
+        /// Unique token to prevent duplicate message sending
+        ///
+        /// **This is deprecated and replaced by `Idempotency-Key`!**
+        #[validate(length(min = 1, max = 64))]
+        pub nonce: Option<String>,
+
+        /// Message content to send
+        #[validate(length(min = 0, max = 2000))]
+        pub content: Option<String>,
+        /// Attachments to include in message
+        pub attachments: Option<Vec<String>>,
+        /// Messages to reply to
+        pub replies: Option<Vec<ReplyIntent>>,
+        /// Embeds to include in message
+        ///
+        /// Text embed content contributes to the content length cap
+        #[validate]
+        pub embeds: Option<Vec<SendableEmbed>>,
+        /// Masquerade to apply to this message
+        #[validate]
+        pub masquerade: Option<Masquerade>,
+        /// Information about how this message should be interacted with
+        pub interactions: Option<Interactions>,
+    }
+);
+
+/// Message Author Abstraction
+pub enum MessageAuthor<'a> {
+    User(&'a User),
+    Webhook(&'a Webhook),
+    System {
+        username: &'a str,
+        avatar: Option<&'a str>,
+    },
+}
+
+impl Interactions {
+    /// Check if default initialisation of fields
+    pub fn is_default(&self) -> bool {
+        !self.restrict_reactions && self.reactions.is_none()
+    }
+}
+
+impl<'a> MessageAuthor<'a> {
+    pub fn id(&self) -> &str {
+        match self {
+            MessageAuthor::User(user) => &user.id,
+            MessageAuthor::Webhook(webhook) => &webhook.id,
+            MessageAuthor::System { .. } => "00000000000000000000000000",
+        }
+    }
+
+    pub fn avatar(&self) -> Option<&str> {
+        match self {
+            MessageAuthor::User(user) => user.avatar.as_ref().map(|file| file.id.as_str()),
+            MessageAuthor::Webhook(webhook) => webhook.avatar.as_ref().map(|file| file.id.as_str()),
+            MessageAuthor::System { avatar, .. } => *avatar,
+        }
+    }
+
+    pub fn username(&self) -> &str {
+        match self {
+            MessageAuthor::User(user) => &user.username,
+            MessageAuthor::Webhook(webhook) => &webhook.name,
+            MessageAuthor::System { username, .. } => username,
+        }
+    }
+}
+
+impl From<SystemMessage> for String {
+    fn from(s: SystemMessage) -> String {
+        match s {
+            SystemMessage::Text { content } => content,
+            SystemMessage::UserAdded { .. } => "User added to the channel.".to_string(),
+            SystemMessage::UserRemove { .. } => "User removed from the channel.".to_string(),
+            SystemMessage::UserJoined { .. } => "User joined the channel.".to_string(),
+            SystemMessage::UserLeft { .. } => "User left the channel.".to_string(),
+            SystemMessage::UserKicked { .. } => "User kicked from the channel.".to_string(),
+            SystemMessage::UserBanned { .. } => "User banned from the channel.".to_string(),
+            SystemMessage::ChannelRenamed { .. } => "Channel renamed.".to_string(),
+            SystemMessage::ChannelDescriptionChanged { .. } => {
+                "Channel description changed.".to_string()
+            }
+            SystemMessage::ChannelIconChanged { .. } => "Channel icon changed.".to_string(),
+            SystemMessage::ChannelOwnershipChanged { .. } => {
+                "Channel ownership changed.".to_string()
+            }
+        }
+    }
+}
+
+impl PushNotification {
+    /// Create a new notification from a given message, author and channel ID
+    pub async fn from(msg: Message, author: Option<MessageAuthor<'_>>, channel_id: &str) -> Self {
+        let config = config().await;
+
+        let icon = if let Some(author) = &author {
+            if let Some(avatar) = author.avatar() {
+                format!("{}/avatars/{}", config.hosts.autumn, avatar)
+            } else {
+                format!("{}/users/{}/default_avatar", config.hosts.api, author.id())
+            }
+        } else {
+            format!("{}/assets/logo.png", config.hosts.app)
+        };
+
+        let image = msg.attachments.and_then(|attachments| {
+            attachments
+                .first()
+                .map(|v| format!("{}/attachments/{}", config.hosts.autumn, v.id))
+        });
+
+        let body = if let Some(sys) = msg.system {
+            sys.into()
+        } else if let Some(text) = msg.content {
+            text
+        } else {
+            "Empty Message".to_string()
+        };
+
+        let timestamp = SystemTime::now()
+            .duration_since(SystemTime::UNIX_EPOCH)
+            .expect("Time went backwards")
+            .as_secs();
+
+        Self {
+            author: author
+                .map(|x| x.username().to_string())
+                .unwrap_or_else(|| "Revolt".to_string()),
+            icon,
+            image,
+            body,
+            tag: channel_id.to_string(),
+            timestamp,
+            url: format!("{}/channel/{}/{}", config.hosts.app, channel_id, msg.id),
+        }
+    }
+}

crates/core/models/src/v0/mod.rs

@@ -1,13 +1,29 @@
-mod account_strikes;
 mod bots;
+mod channel_invites;
+mod channel_unreads;
 mod channel_webhooks;
 mod channels;
+mod embeds;
+mod emojis;
 mod files;
+mod messages;
+mod server_bans;
+mod server_members;
+mod servers;
+mod user_settings;
 mod users;
 
-pub use account_strikes::*;
 pub use bots::*;
+pub use channel_invites::*;
+pub use channel_unreads::*;
 pub use channel_webhooks::*;
 pub use channels::*;
+pub use embeds::*;
+pub use emojis::*;
 pub use files::*;
+pub use messages::*;
+pub use server_bans::*;
+pub use server_members::*;
+pub use servers::*;
+pub use user_settings::*;
 pub use users::*;

crates/core/models/src/v0/server_bans.rs

@@ -0,0 +1,12 @@
+use super::MemberCompositeKey;
+
+auto_derived!(
+    /// Server Ban
+    pub struct ServerBan {
+        /// Unique member id
+        #[cfg_attr(feature = "serde", serde(rename = "_id"))]
+        pub id: MemberCompositeKey,
+        /// Reason for ban creation
+        pub reason: Option<String>,
+    }
+);

crates/core/models/src/v0/server_members.rs

@@ -0,0 +1,80 @@
+use super::File;
+
+use iso8601_timestamp::Timestamp;
+use once_cell::sync::Lazy;
+use regex::Regex;
+
+/// Regex for valid role colours
+///
+/// Allows the use of named colours, rgb(a), variables and all gradients.
+///
+/// Flags:
+/// - Case-insensitive (`i`)
+///
+/// Source:
+/// ```regex
+/// VALUE = [a-z ]+|var\(--[a-z\d-]+\)|rgba?\([\d, ]+\)|#[a-f0-9]+
+/// ADDITIONAL_VALUE = \d+deg
+/// STOP = ([ ]+(\d{1,3}%|0))?
+///
+/// ^(?:VALUE|(repeating-)?(linear|conic|radial)-gradient\((VALUE|ADDITIONAL_VALUE)STOP(,[ ]*(VALUE)STOP)+\))$
+/// ```
+pub static RE_COLOUR: Lazy<Regex> = Lazy::new(|| {
+    Regex::new(r"(?i)^(?:[a-z ]+|var\(--[a-z\d-]+\)|rgba?\([\d, ]+\)|#[a-f0-9]+|(repeating-)?(linear|conic|radial)-gradient\(([a-z ]+|var\(--[a-z\d-]+\)|rgba?\([\d, ]+\)|#[a-f0-9]+|\d+deg)([ ]+(\d{1,3}%|0))?(,[ ]*([a-z ]+|var\(--[a-z\d-]+\)|rgba?\([\d, ]+\)|#[a-f0-9]+)([ ]+(\d{1,3}%|0))?)+\))$").unwrap()
+});
+
+auto_derived_partial!(
+    /// Server Member
+    pub struct Member {
+        /// Unique member id
+        #[cfg_attr(feature = "serde", serde(rename = "_id"))]
+        pub id: MemberCompositeKey,
+
+        /// Time at which this user joined the server
+        pub joined_at: Timestamp,
+
+        /// Member's nickname
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
+        pub nickname: Option<String>,
+        /// Avatar attachment
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
+        pub avatar: Option<File>,
+
+        /// Member's roles
+        #[cfg_attr(
+            feature = "serde",
+            serde(skip_serializing_if = "Vec::is_empty", default)
+        )]
+        pub roles: Vec<String>,
+        /// Timestamp this member is timed out until
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
+        pub timeout: Option<Timestamp>,
+    },
+    "PartialMember"
+);
+
+auto_derived!(
+    /// Composite primary key consisting of server and user id
+    #[derive(Hash, Default)]
+    pub struct MemberCompositeKey {
+        /// Server Id
+        pub server: String,
+        /// User Id
+        pub user: String,
+    }
+
+    /// Optional fields on server member object
+    pub enum FieldsMember {
+        Nickname,
+        Avatar,
+        Roles,
+        Timeout,
+    }
+
+    /// Member removal intention
+    pub enum RemovalIntention {
+        Leave,
+        Kick,
+        Ban,
+    }
+);

crates/core/models/src/v0/servers.rs

@@ -0,0 +1,144 @@
+use super::File;
+
+use revolt_permissions::OverrideField;
+use std::collections::HashMap;
+
+auto_derived_partial!(
+    /// Server
+    pub struct Server {
+        /// Unique Id
+        #[cfg_attr(feature = "serde", serde(rename = "_id"))]
+        pub id: String,
+        /// User id of the owner
+        pub owner: String,
+
+        /// Name of the server
+        pub name: String,
+        /// Description for the server
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
+        pub description: Option<String>,
+
+        /// Channels within this server
+        // ! FIXME: this may be redundant
+        pub channels: Vec<String>,
+        /// Categories for this server
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
+        pub categories: Option<Vec<Category>>,
+        /// Configuration for sending system event messages
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
+        pub system_messages: Option<SystemMessageChannels>,
+
+        /// Roles for this server
+        #[cfg_attr(
+            feature = "serde",
+            serde(
+                default = "HashMap::<String, Role>::new",
+                skip_serializing_if = "HashMap::<String, Role>::is_empty"
+            )
+        )]
+        pub roles: HashMap<String, Role>,
+        /// Default set of server and channel permissions
+        pub default_permissions: i64,
+
+        /// Icon attachment
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
+        pub icon: Option<File>,
+        /// Banner attachment
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
+        pub banner: Option<File>,
+
+        /// Bitfield of server flags
+        #[cfg_attr(
+            feature = "serde",
+            serde(skip_serializing_if = "crate::if_zero_u32", default)
+        )]
+        pub flags: u32,
+
+        /// Whether this server is flagged as not safe for work
+        #[cfg_attr(
+            feature = "serde",
+            serde(skip_serializing_if = "crate::if_false", default)
+        )]
+        pub nsfw: bool,
+        /// Whether to enable analytics
+        #[cfg_attr(
+            feature = "serde",
+            serde(skip_serializing_if = "crate::if_false", default)
+        )]
+        pub analytics: bool,
+        /// Whether this server should be publicly discoverable
+        #[cfg_attr(
+            feature = "serde",
+            serde(skip_serializing_if = "crate::if_false", default)
+        )]
+        pub discoverable: bool,
+    },
+    "PartialServer"
+);
+
+auto_derived_partial!(
+    /// Role
+    pub struct Role {
+        /// Role name
+        pub name: String,
+        /// Permissions available to this role
+        pub permissions: OverrideField,
+        /// Colour used for this role
+        ///
+        /// This can be any valid CSS colour
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
+        pub colour: Option<String>,
+        /// Whether this role should be shown separately on the member sidebar
+        #[cfg_attr(
+            feature = "serde",
+            serde(skip_serializing_if = "crate::if_false", default)
+        )]
+        pub hoist: bool,
+        /// Ranking of this role
+        #[cfg_attr(feature = "serde", serde(default))]
+        pub rank: i64,
+    },
+    "PartialRole"
+);
+
+auto_derived!(
+    /// Optional fields on server object
+    pub enum FieldsServer {
+        Description,
+        Categories,
+        SystemMessages,
+        Icon,
+        Banner,
+    }
+
+    /// Optional fields on server object
+    pub enum FieldsRole {
+        Colour,
+    }
+
+    /// Channel category
+    pub struct Category {
+        /// Unique ID for this category
+        pub id: String,
+        /// Title for this category
+        pub title: String,
+        /// Channels in this category
+        pub channels: Vec<String>,
+    }
+
+    /// System message channel assignments
+    pub struct SystemMessageChannels {
+        /// ID of channel to send user join messages in
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
+        pub user_joined: Option<String>,
+        /// ID of channel to send user left messages in
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
+        pub user_left: Option<String>,
+        /// ID of channel to send user kicked messages in
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
+        pub user_kicked: Option<String>,
+        /// ID of channel to send user banned messages in
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
+        pub user_banned: Option<String>,
+    }
+);

crates/core/models/src/v0/user_settings.rs

@@ -0,0 +1,6 @@
+use std::collections::HashMap;
+
+/// HashMap of user settings
+/// Each key is mapped to a tuple consisting of the
+/// revision timestamp and serialised data (in JSON format)
+pub type UserSettings = HashMap<String, (i64, String)>;

crates/core/models/src/v0/users.rs

@@ -1,68 +1,110 @@
+use once_cell::sync::Lazy;
+use regex::Regex;
+
 use super::File;
 
-auto_derived!(
+/// Regex for valid usernames
+///
+/// Block zero width space
+/// Block lookalike characters
+pub static RE_USERNAME: Lazy<Regex> = Lazy::new(|| Regex::new(r"^(\p{L}|[\d_.-])+$").unwrap());
+
+auto_derived_partial!(
     /// User
     pub struct User {
         /// Unique Id
-        #[serde(rename = "_id")]
+        #[cfg_attr(feature = "serde", serde(rename = "_id"))]
         pub id: String,
         /// Username
         pub username: String,
         /// Discriminator
         pub discriminator: String,
         /// Display name
-        #[serde(skip_serializing_if = "Option::is_none")]
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
         pub display_name: Option<String>,
-        #[serde(skip_serializing_if = "Option::is_none")]
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
         /// Avatar attachment
         pub avatar: Option<File>,
         /// Relationships with other users
-        #[serde(skip_serializing_if = "Vec::is_empty", default)]
+        #[cfg_attr(
+            feature = "serde",
+            serde(skip_serializing_if = "Vec::is_empty", default)
+        )]
         pub relations: Vec<Relationship>,
 
         /// Bitfield of user badges
-        #[serde(skip_serializing_if = "crate::if_zero_u32", default)]
+        #[cfg_attr(
+            feature = "serde",
+            serde(skip_serializing_if = "crate::if_zero_u32", default)
+        )]
         pub badges: u32,
         /// User's current status
-        #[serde(skip_serializing_if = "Option::is_none")]
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
         pub status: Option<UserStatus>,
         /// User's profile page
-        #[serde(skip_serializing_if = "Option::is_none")]
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
         pub profile: Option<UserProfile>,
 
         /// Enum of user flags
-        #[serde(skip_serializing_if = "crate::if_zero_u32", default)]
+        #[cfg_attr(
+            feature = "serde",
+            serde(skip_serializing_if = "crate::if_zero_u32", default)
+        )]
         pub flags: u32,
         /// Whether this user is privileged
-        #[serde(skip_serializing_if = "crate::if_false", default)]
+        #[cfg_attr(
+            feature = "serde",
+            serde(skip_serializing_if = "crate::if_false", default)
+        )]
         pub privileged: bool,
         /// Bot information
-        #[serde(skip_serializing_if = "Option::is_none")]
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
         pub bot: Option<BotInformation>,
 
         /// Current session user's relationship with this user
         pub relationship: RelationshipStatus,
         /// Whether this user is currently online
         pub online: bool,
+    },
+    "PartialUser"
+);
+
+auto_derived!(
+    /// Optional fields on user object
+    pub enum FieldsUser {
+        Avatar,
+        StatusText,
+        StatusPresence,
+        ProfileContent,
+        ProfileBackground,
     }
 
     /// User's relationship with another user (or themselves)
     #[derive(Default)]
     pub enum RelationshipStatus {
+        /// No relationship with other user
         #[default]
         None,
+        /// Other user is us
         User,
+        /// Friends with the other user
         Friend,
+        /// Pending friend request to user
         Outgoing,
+        /// Incoming friend request from user
         Incoming,
+        /// Blocked this user
         Blocked,
+        /// Blocked by this user
         BlockedOther,
     }
 
     /// Relationship entry indicating current status with other user
     pub struct Relationship {
-        #[serde(rename = "_id")]
+        /// Other user's Id
+        #[cfg_attr(feature = "serde", serde(rename = "_id"))]
         pub user_id: String,
+        /// Relationship status with them
         pub status: RelationshipStatus,
     }
 
@@ -83,20 +125,20 @@ auto_derived!(
     /// User's active status
     pub struct UserStatus {
         /// Custom status text
-        #[serde(skip_serializing_if = "String::is_empty")]
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "String::is_empty"))]
         pub text: String,
         /// Current presence option
-        #[serde(skip_serializing_if = "Option::is_none")]
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
         pub presence: Option<Presence>,
     }
 
     /// User's profile
     pub struct UserProfile {
         /// Text content on user's profile
-        #[serde(skip_serializing_if = "String::is_empty")]
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "String::is_empty"))]
         pub content: String,
         /// Background visible on user's profile
-        #[serde(skip_serializing_if = "Option::is_none")]
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
         pub background: Option<File>,
     }
 
@@ -143,7 +185,7 @@ auto_derived!(
     /// Bot information for if the user is a bot
     pub struct BotInformation {
         /// Id of the owner of this bot
-        #[serde(rename = "owner")]
+        #[cfg_attr(feature = "serde", serde(rename = "owner"))]
         pub owner_id: String,
     }
 );

crates/core/permissions/Cargo.toml

@@ -1,18 +1,18 @@
 [package]
 name = "revolt-permissions"
-version = "0.6.1"
+version = "0.6.8"
 edition = "2021"
 license = "AGPL-3.0-or-later"
-authors = [ "Paul Makles <me@insrt.uk>" ]
+authors = ["Paul Makles <me@insrt.uk>"]
 description = "Revolt Backend: Permission Logic"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [features]
 bson = ["dep:bson"]
-serde = [ "dep:serde" ]
+serde = ["dep:serde"]
-schemas = [ "dep:schemars" ]
+schemas = ["dep:schemars"]
-try-from-primitive = [ "dep:num_enum" ]
+try-from-primitive = ["dep:num_enum"]
 
 
 [dev-dependencies]
@@ -20,6 +20,9 @@ try-from-primitive = [ "dep:num_enum" ]
 async-std = { version = "1.8.0", features = ["attributes"] }
 
 [dependencies]
+# Core
+revolt-result = { version = "0.6.5", path = "../result" }
+
 # Utility
 auto_ops = "0.3.0"
 once_cell = "1.17"
@@ -30,7 +33,7 @@ async-trait = "0.1.51"
 
 # Serialisation
 serde = { version = "1", features = ["derive"], optional = true }
-bson = { version = "2.1.0", optional = true}
+bson = { version = "2.1.0", optional = true }
 
 # Spec Generation
-schemars = { version = "0.8.8", optional = true }
+schemars = { version = "0.8.8", optional = true }

crates/core/permissions/src/impl.rs

@@ -118,6 +118,10 @@ pub async fn calculate_channel_permissions<P: PermissionQuery>(query: &mut P) ->
                     permissions.restrict(*ALLOW_IN_TIMEOUT);
                 }
 
+                if !permissions.has_channel_permission(ChannelPermission::ViewChannel) {
+                    permissions.revoke_all();
+                }
+                
                 permissions
             } else {
                 0_u64.into()

crates/core/permissions/src/models/channel.rs

@@ -1,5 +1,5 @@
 use once_cell::sync::Lazy;
-use std::ops::Add;
+use std::{fmt, ops::Add};
 
 /// Abstract channel type
 pub enum ChannelType {
@@ -102,6 +102,12 @@ pub enum ChannelPermission {
     GrantAll = u64::MAX,
 }
 
+impl fmt::Display for ChannelPermission {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        fmt::Debug::fmt(self, f)
+    }
+}
+
 impl_op_ex!(+ |a: &ChannelPermission, b: &ChannelPermission| -> u64 { *a as u64 | *b as u64 });
 impl_op_ex_commutative!(+ |a: &u64, b: &ChannelPermission| -> u64 { *a | *b as u64 });
 
@@ -135,3 +141,10 @@ pub static DEFAULT_PERMISSION_SERVER: Lazy<u64> = Lazy::new(|| {
             + ChannelPermission::ChangeAvatar,
     )
 });
+
+pub static DEFAULT_WEBHOOK_PERMISSIONS: Lazy<u64> = Lazy::new(|| {
+    ChannelPermission::SendMessage
+        + ChannelPermission::SendEmbeds
+        + ChannelPermission::Masquerade
+        + ChannelPermission::React
+});

crates/core/permissions/src/models/mod.rs

@@ -3,6 +3,7 @@ mod server;
 mod user;
 
 pub use channel::*;
+use revolt_result::{create_error, Result};
 pub use server::*;
 pub use user::*;
 
@@ -27,10 +28,36 @@ impl PermissionValue {
         self.0 &= !v;
     }
 
+    /// Revoke all permissions
+    pub fn revoke_all(&mut self) {
+        self.0 = 0;
+    }
+
     /// Restrict to given permissions
     pub fn restrict(&mut self, v: u64) {
         self.0 &= v;
     }
+
+    /// Check whether certain a permission has been granted
+    pub fn has(&self, v: u64) -> bool {
+        (self.0 & v) == v
+    }
+
+    /// Check whether certain a channel permission has been granted
+    pub fn has_channel_permission(&self, permission: ChannelPermission) -> bool {
+        self.has(permission as u64)
+    }
+
+    /// Throw if missing channel permission
+    pub fn throw_if_lacking_channel_permission(&self, permission: ChannelPermission) -> Result<()> {
+        if self.has_channel_permission(permission) {
+            Ok(())
+        } else {
+            Err(create_error!(MissingPermission {
+                permission: permission.to_string()
+            }))
+        }
+    }
 }
 
 impl From<i64> for PermissionValue {