add delete command to clean up the channel

src/commands/join.rs

@@ -7,8 +7,8 @@ pub(crate) async fn join(
     msg: Message,
     state: State,
 ) -> Result<(), Box<dyn Error + Send + Sync + 'static>> {
-    let user_id = msg.author.id;
     let guild_id = msg.guild_id.ok_or("No guild id attached to the message.")?;
+    let user_id = msg.author.id;
     let channel_id = state
         .cache
         .voice_state(user_id, guild_id)
@@ -16,16 +16,19 @@ pub(crate) async fn join(
         .channel_id();
     let channel_id =
         NonZeroU64::new(channel_id.into()).ok_or("Joined voice channel must have nonzero ID.")?;
-    state
-        .songbird
-        .join(guild_id, channel_id)
-        .await
-        .map_err(|e| format!("Could not join voice channel: {:?}", e))?;
 
     // signal that we are not listening
     if let Some(call_lock) = state.songbird.get(guild_id) {
         let mut call = call_lock.lock().await;
         call.deafen(true).await?;
     }
+
+    // join the voice channel
+    state
+        .songbird
+        .join(guild_id, channel_id)
+        .await
+        .map_err(|e| format!("Could not join voice channel: {:?}", e))?;
+
     Ok(())
 }