From 5c762eaf2310d72b7c5c7d2ba497d94c6441126a Mon Sep 17 00:00:00 2001
From: Tom Smeding <tom.smeding@gmail.com>
Date: Tue, 13 Oct 2020 20:47:57 +0200
Subject: rust: Understand _push leave

---
 rust/src/main.rs | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/rust/src/main.rs b/rust/src/main.rs
index 0d5767f..f7a2660 100644
--- a/rust/src/main.rs
+++ b/rust/src/main.rs
@@ -252,6 +252,21 @@ impl App {
         Ok(())
     }
 
+    async fn leave_room(self: &Arc<Self>, room: &Word) -> io::Result<()> {
+        debug!("leave_room({})", room);
+
+        {
+            let mut state = self.state.lock().await;
+            if state.currentroom == *room {
+                state.currentroom = STATUS_ROOM.clone();
+            }
+            state.roomlist.retain(|r| r != room);
+            state.rooms.remove(room);
+        }
+
+        self.full_redraw().await
+    }
+
     async fn put_members(self: &Arc<Self>, room: &Word, ms: Vec<Word>) -> io::Result<()> {
         debug!("put_members {} #{}", room, ms.len());
         let mut state = self.state.lock().await;
@@ -266,6 +281,13 @@ impl App {
         state.full_redraw()
     }
 
+    async fn remove_member(self: &Arc<Self>, room: &Word, user: Word) -> io::Result<()> {
+        debug!("remove_member {} {}", room, user);
+        let mut state = self.state.lock().await;
+        state.rooms.get_mut(room).unwrap().members.retain(|u| *u != user);
+        state.full_redraw()
+    }
+
     async fn put_history(self: &Arc<Self>, room: &Word, hist: Vec<Message>) -> io::Result<()> {
         debug!("put_history {} #{}", room, hist.len());
         let mut state = self.state.lock().await;
@@ -335,6 +357,14 @@ impl App {
                 self.add_member(&room, username.clone()).await.unwrap();
                 self.append_history_item(&room, HItem::Service(format!("Join: <{}>", username), false)).await.unwrap();
             }
+            PushMessage::Leave { roomname: room, username: user } => {
+                if user == self.username {
+                    self.leave_room(&room).await.unwrap();
+                } else {
+                    self.remove_member(&room, user.clone()).await.unwrap();
+                    self.append_history_item(&room, HItem::Service(format!("Leave: <{}>", user), false)).await.unwrap();
+                }
+            }
             PushMessage::Message(msg) => {
                 let mention = contains_mention(&msg.message, &self.username);
                 if self.decide_push_notify(&msg.roomname, mention).await {
-- 
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