Add event when user goes offline.

publish.sh

+#!/bin/bash
+# Tip: for subsequent builds, don't update Cargo.toml
+# in order to not download all the crates again.
+# Update Cargo.toml on major release.
+version=0.4.1-alpha.4
+docker build -t revoltchat/server:${version} . &&
+    docker push revoltchat/server:${version}

src/notifications/websocket.rs

@@ -220,13 +220,27 @@ async fn accept(stream: TcpStream) {
     info!("User {} disconnected.", &addr);
     CONNECTIONS.lock().unwrap().remove(&addr);
 
-    let session = session.lock().unwrap();
-    if let Some(session) = session.as_ref() {
-        let mut users = USERS.write().unwrap();
-        users.remove(&session.user_id, &addr);
-        if users.get_left(&session.user_id).is_none() {
-            get_hive().drop_client(&session.user_id).unwrap();
+    let mut offline = None;
+    {
+        let session = session.lock().unwrap();
+        if let Some(session) = session.as_ref() {
+            let mut users = USERS.write().unwrap();
+            users.remove(&session.user_id, &addr);
+            if users.get_left(&session.user_id).is_none() {
+                get_hive().drop_client(&session.user_id).unwrap();
+                offline = Some(session.user_id.clone());
+            }
+        }
+    }
+
+    if let Some(id) = offline {
+        ClientboundNotification::UserPresence {
+            id: id.clone(),
+            online: false,
         }
+        .publish(id)
+        .await
+        .ok();
     }
 }
 

src/routes/root.rs

@@ -9,7 +9,7 @@ use rocket_contrib::json::JsonValue;
 #[get("/")]
 pub async fn root() -> JsonValue {
     json!({
-        "revolt": "0.4.1-alpha.3",
+        "revolt": "0.4.1-alpha.4",
         "features": {
             "registration": !*DISABLE_REGISTRATION,
             "captcha": {