Invite bot to server / group for #8.

src/database/entities/channel.rs

@@ -3,6 +3,7 @@ use std::collections::HashMap;
 use crate::database::*;
 use crate::notifications::events::ClientboundNotification;
 use crate::util::result::{Error, Result};
+use crate::util::variables::MAX_GROUP_SIZE;
 use futures::StreamExt;
 use mongodb::bson::Bson;
 use mongodb::{
@@ -344,4 +345,53 @@ impl Channel {
 
         Ok(())
     }
+
+    pub async fn add_to_group(&self, member: String, by_user: String) -> Result<()> {
+        if let Channel::Group { id, recipients, .. } = &self {
+            if recipients.len() >= *MAX_GROUP_SIZE {
+                Err(Error::GroupTooLarge {
+                    max: *MAX_GROUP_SIZE,
+                })?
+            }
+
+            if recipients.iter().find(|x| *x == &member).is_some() {
+                Err(Error::AlreadyInGroup)?
+            }
+
+            get_collection("channels")
+                .update_one(
+                    doc! {
+                        "_id": &id
+                    },
+                    doc! {
+                        "$push": {
+                            "recipients": &member
+                        }
+                    },
+                    None,
+                )
+                .await
+                .map_err(|_| Error::DatabaseError {
+                    operation: "update_one",
+                    with: "channel",
+                })?;
+
+            ClientboundNotification::ChannelGroupJoin {
+                id: id.clone(),
+                user: member.clone(),
+            }
+            .publish(id.clone());
+
+            Content::SystemMessage(SystemMessage::UserAdded {
+                id: member,
+                by: by_user,
+            })
+            .send_as_system(&self)
+            .await
+            .ok();
+            Ok(())
+        } else {
+            Err(Error::InvalidOperation)
+        }
+    }
 }

src/database/guards/reference.rs

@@ -61,6 +61,10 @@ impl Ref {
         self.fetch("channel_invites").await
     }
 
+    pub async fn fetch_bot(&self) -> Result<Bot> {
+        self.fetch("bots").await
+    }
+
     pub async fn fetch_member(&self, server: &str) -> Result<Member> {
         let doc = get_collection("server_members")
             .find_one(

src/routes/bots/invite.rs

@@ -0,0 +1,65 @@
+use crate::database::*;
+use crate::util::result::{Error, Result};
+
+use rocket::serde::json::Json;
+use serde::Deserialize;
+
+#[derive(Deserialize)]
+pub struct ServerId {
+    server: String
+}
+
+#[derive(Deserialize)]
+pub struct GroupId {
+    group: String
+}
+
+#[derive(Deserialize)]
+#[serde(untagged)]
+pub enum Destination {
+    Server(ServerId),
+    Group(GroupId)
+}
+
+#[post("/<target>/invite", data = "<dest>")]
+pub async fn invite_bot(user: User, target: Ref, dest: Json<Destination>) -> Result<()> {
+    let bot = target.fetch_bot().await?;
+
+    if !bot.public {
+        if bot.owner != user.id {
+            return Err(Error::BotIsPrivate);
+        }
+    }
+
+    match dest.into_inner() {
+        Destination::Server(ServerId { server }) => {
+            let server = Ref::from(server)?.fetch_server().await?;
+
+            let perm = permissions::PermissionCalculator::new(&user)
+                .with_server(&server)
+                .for_server()
+                .await?;
+        
+            if !perm.get_manage_server() {
+                Err(Error::MissingPermission)?
+            }
+
+            server.join_member(&bot.id).await?;
+            Ok(())
+        }
+        Destination::Group(GroupId { group }) => {
+            let channel = Ref::from(group)?.fetch_channel().await?;
+
+            let perm = permissions::PermissionCalculator::new(&user)
+                .with_channel(&channel)
+                .for_channel()
+                .await?;
+        
+            if !perm.get_invite_others() {
+                Err(Error::MissingPermission)?
+            }
+
+            channel.add_to_group(bot.id, user.id).await
+        }
+    }
+}

src/routes/bots/mod.rs

@@ -1,9 +1,11 @@
 use rocket::Route;
 
 mod create;
+mod invite;
 
 pub fn routes() -> Vec<Route> {
     routes![
-        create::create_bot
+        create::create_bot,
+        invite::invite_bot
     ]
 }

src/routes/channels/group_add_member.rs

@@ -1,6 +1,5 @@
 use crate::util::result::{Error, Result};
-use crate::util::variables::MAX_GROUP_SIZE;
-use crate::{database::*, notifications::events::ClientboundNotification};
+use crate::database::*;
 
 use mongodb::bson::doc;
 
@@ -20,51 +19,5 @@ pub async fn req(user: User, target: Ref, member: Ref) -> Result<()> {
         Err(Error::MissingPermission)?
     }
 
-    if let Channel::Group { id, recipients, .. } = &channel {
-        if recipients.len() >= *MAX_GROUP_SIZE {
-            Err(Error::GroupTooLarge {
-                max: *MAX_GROUP_SIZE,
-            })?
-        }
-
-        if recipients.iter().find(|x| *x == &member.id).is_some() {
-            Err(Error::AlreadyInGroup)?
-        }
-
-        get_collection("channels")
-            .update_one(
-                doc! {
-                    "_id": &id
-                },
-                doc! {
-                    "$push": {
-                        "recipients": &member.id
-                    }
-                },
-                None,
-            )
-            .await
-            .map_err(|_| Error::DatabaseError {
-                operation: "update_one",
-                with: "channel",
-            })?;
-
-        ClientboundNotification::ChannelGroupJoin {
-            id: id.clone(),
-            user: member.id.clone(),
-        }
-        .publish(id.clone());
-
-        Content::SystemMessage(SystemMessage::UserAdded {
-            id: member.id,
-            by: user.id,
-        })
-        .send_as_system(&channel)
-        .await
-        .ok();
-
-        Ok(())
-    } else {
-        Err(Error::InvalidOperation)
-    }
+    channel.add_to_group(member.id, user.id).await
 }

src/routes/sync/get_unreads.rs

@@ -1,5 +1,5 @@
 use crate::database::*;
-use crate::util::result::Result;
+use crate::util::result::{Error, Result};
 
 use mongodb::bson::doc;
 use rocket::serde::json::Value;

src/util/result.rs

@@ -47,6 +47,7 @@ pub enum Error {
     // ? Bot related errors.
     ReachedMaximumBots,
     IsBot,
+    BotIsPrivate,
 
     // ? General errors.
     TooManyIds,
@@ -104,6 +105,7 @@ impl<'r> Responder<'r, 'static> for Error {
 
             Error::ReachedMaximumBots => Status::BadRequest,
             Error::IsBot => Status::BadRequest,
+            Error::BotIsPrivate => Status::Forbidden,
 
             Error::FailedValidation { .. } => Status::UnprocessableEntity,
             Error::DatabaseError { .. } => Status::InternalServerError,