Channels: Include last message id on text channels.

API: Return members when fetching messages.
Misc: Remove defunct DISABLE_REGISTRATION variable.

src/database/entities/channel.rs

@@ -63,6 +63,8 @@ pub enum Channel {
         description: Option<String>,
         #[serde(skip_serializing_if = "Option::is_none")]
         icon: Option<File>,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        last_message: Option<String>,
     },
 }
 

src/database/entities/message.rs

@@ -90,7 +90,7 @@ impl Message {
                 "last_message": {
                     "_id": self.id.clone(),
                     "author": self.author.clone(),
-                    "short": text.chars().take(24).collect::<String>()
+                    "short": text.chars().take(128).collect::<String>()
                 }
             }
         } else {
@@ -133,6 +133,25 @@ impl Message {
                         })?;
                 }
             }
+            Channel::TextChannel { id, .. } => {
+                if let Content::Text(_) = &self.content {
+                    channels
+                        .update_one(
+                            doc! { "_id": id },
+                            doc! {
+                                "$set": {
+                                    "last_message": &self.id
+                                }
+                            },
+                            None,
+                        )
+                        .await
+                        .map_err(|_| Error::DatabaseError {
+                            operation: "update_one",
+                            with: "channel",
+                        })?;
+                }
+            }
             _ => {}
         }
 

src/database/entities/server.rs

@@ -3,6 +3,7 @@ use crate::notifications::events::ClientboundNotification;
 use crate::util::result::{Error, Result};
 use futures::StreamExt;
 use mongodb::bson::doc;
+use mongodb::bson::from_document;
 use mongodb::bson::to_document;
 use mongodb::bson::Document;
 use mongodb::options::FindOptions;
@@ -148,7 +149,7 @@ impl Server {
             })?;
 
         // Delete all channels, members, bans and invites.
-        for with in ["channels", "invites"] {
+        for with in &["channels", "invites"] {
             get_collection(with)
                 .delete_many(
                     doc! {
@@ -163,7 +164,7 @@ impl Server {
                 })?;
         }
 
-        for with in ["server_members", "server_bans"] {
+        for with in &["server_members", "server_bans"] {
             get_collection(with)
                 .delete_many(
                     doc! {
@@ -207,6 +208,27 @@ impl Server {
         Ok(())
     }
 
+    pub async fn fetch_members(id: &str) -> Result<Vec<Member>> {
+        Ok(get_collection("server_members")
+            .find(
+                doc! {
+                    "_id.server": id
+                },
+                None,
+            )
+            .await
+            .map_err(|_| Error::DatabaseError {
+                operation: "find",
+                with: "server_members",
+            })?
+            .filter_map(async move |s| s.ok())
+            .collect::<Vec<Document>>()
+            .await
+            .into_iter()
+            .filter_map(|x| from_document(x).ok())
+            .collect::<Vec<Member>>())
+    }
+
     pub async fn fetch_member_ids(id: &str) -> Result<Vec<String>> {
         Ok(get_collection("server_members")
             .find(