fixed playing greet on all voice actions

src/main.rs

@@ -136,9 +136,10 @@ impl EventHandler for Handler {
         &self,
         ctx: Context,
         guild_id_opt: Option<GuildId>,
-        _old: Option<VoiceState>,
+        old: Option<VoiceState>,
         new: VoiceState,
     ) {
+        if old.is_none() {
             if let (Some(guild_id), Some(user_channel)) = (guild_id_opt, new.channel_id) {
                 if let Some(guild) = ctx.cache.guild(guild_id).await {
                     let pool = ctx
@@ -197,6 +198,16 @@ SELECT name, id, plays, public, server_id, uploader_id
             }
         }
     }
+}
+
+struct LeaveInactive;
+
+#[async_trait]
+impl SongbirdEventHandler for LeaveInactive {
+    async fn act(&self, ctx: &EventContext<'_>) -> Option<Event> {
+        None
+    }
+}
 
 async fn play_audio(
     sound: &mut Sound,
@@ -239,7 +250,7 @@ async fn join_channel(
         .get(&current_user)
         .and_then(|voice_state| voice_state.channel_id);
 
-    if current_voice_state == Some(channel_id) {
+    let (call, res) = if current_voice_state == Some(channel_id) {
         let call_opt = songbird.get(guild.id);
 
         if let Some(call) = call_opt {
@@ -249,7 +260,14 @@ async fn join_channel(
         }
     } else {
         songbird.join(guild.id, channel_id).await
-    }
+    };
+
+    call.lock().await.add_global_event(
+        Event::Periodic(Duration::from_secs(300), None),
+        LeaveInactive {},
+    );
+
+    (call, res)
 }
 
 // entry point