Allow clients to listen for all track events

Author: duncte123

src/main/kotlin/dev/arbjerg/lavalink/client/events.kt

@@ -26,20 +26,20 @@ data class StatsEvent(override val node: LavalinkNode, override val event: Messa
     : ClientEvent<Message.StatsEvent>(node, event)
 
 // Player events
-data class EmittedEvent(override val node: LavalinkNode, override val event: Message.EmittedEvent)
-    : ClientEvent<Message.EmittedEvent>(node, event)
+sealed class EmittedEvent<T : Message.EmittedEvent>(override val node: LavalinkNode, override val event: T)
+    : ClientEvent<T>(node, event)
 
 data class TrackStartEvent(override val node: LavalinkNode, override val event: Message.EmittedEvent.TrackStartEvent)
-    : ClientEvent<Message.EmittedEvent.TrackStartEvent>(node, event)
+    : EmittedEvent<Message.EmittedEvent.TrackStartEvent>(node, event)
 
 data class TrackEndEvent(override val node: LavalinkNode, override val event: Message.EmittedEvent.TrackEndEvent)
-    : ClientEvent<Message.EmittedEvent.TrackEndEvent>(node, event)
+    : EmittedEvent<Message.EmittedEvent.TrackEndEvent>(node, event)
 
 data class TrackExceptionEvent(override val node: LavalinkNode, override val event: Message.EmittedEvent.TrackExceptionEvent)
-    : ClientEvent<Message.EmittedEvent.TrackExceptionEvent>(node, event)
+    : EmittedEvent<Message.EmittedEvent.TrackExceptionEvent>(node, event)
 
 data class TrackStuckEvent(override val node: LavalinkNode, override val event: Message.EmittedEvent.TrackStuckEvent)
-    : ClientEvent<Message.EmittedEvent.TrackStuckEvent>(node, event)
+    : EmittedEvent<Message.EmittedEvent.TrackStuckEvent>(node, event)
 
 data class WebSocketClosedEvent(override val node: LavalinkNode, override val event: Message.EmittedEvent.WebSocketClosedEvent)
-    : ClientEvent<Message.EmittedEvent.WebSocketClosedEvent>(node, event)
+    : EmittedEvent<Message.EmittedEvent.WebSocketClosedEvent>(node, event)

src/test/java/JavaJDAExample.java

@@ -101,6 +101,21 @@ private void registerLavalinkListeners() {
                     event.getPlayers()
             );
         });
+
+        this.client.on(EmittedEvent.class).subscribe((data) -> {
+            if (data instanceof TrackStartEvent) {
+                System.out.println("Is a track start event!");
+            }
+
+            final var node = data.getNode();
+            final var event = data.getEvent();
+
+            System.out.printf(
+                    "Node '%s' emitted event: %s%n",
+                    node.getName(),
+                    event
+            );
+        });
     }
 
     @Override

src/test/kotlin/testScript.kt

@@ -33,6 +33,18 @@ fun main() {
             println("Node '${node.name}' has stats, current players: ${event.playingPlayers}/${event.players}")
         }
 
+    client.on<EmittedEvent<*>>()
+        .subscribe { raw ->
+            if (raw is TrackStartEvent) {
+                println("Is a track start event!")
+            }
+
+            val node = raw.node
+            val event = raw.event
+
+            println("Node '${node.name}' emitted event: $event")
+        }
+
     JDABuilder.createDefault(token)
         .setVoiceDispatchInterceptor(JDAVoiceUpdateListener(client))
         .enableIntents(