fix: resolve event emitter not emitting because of missing call to setChanged

src/main/java/uulm/teamname/marvelous/gamelibrary/gamelogic/EventEmitter.java

@@ -1,8 +1,17 @@
 package uulm.teamname.marvelous.gamelibrary.gamelogic;
 
+import uulm.teamname.marvelous.gamelibrary.events.Event;
+
 import java.util.Observable;
 
 /** Represents an event emitter for game events fired by a game instance. */
 class EventEmitter extends Observable {
-
+    /**
+     * Emits an array of {@link Event}s. This method is necessary because {@link Observable#setChanged} is protected.
+     * @param events The events to emit
+     */
+    public void update(Event... events) {
+        setChanged();
+        notifyObservers(events);
+    }
 }

src/main/java/uulm/teamname/marvelous/gamelibrary/gamelogic/EventObserver.java

@@ -0,0 +1,22 @@
+package uulm.teamname.marvelous.gamelibrary.gamelogic;
+
+import uulm.teamname.marvelous.gamelibrary.events.Event;
+
+import java.util.Observable;
+import java.util.Observer;
+
+/** Represents an event observer for game events emitted by an {@link EventEmitter}. */
+public class EventObserver implements Observer {
+    @Override
+    public void update(Observable o, Object arg) {
+        handle((Event)arg);
+    }
+
+    /**
+     * Gets called with incoming {@link Event}s. Override this method to handle events.
+     * @param event The event that got emitted
+     */
+    protected void handle(Event event) {
+
+    }
+}

src/main/java/uulm/teamname/marvelous/gamelibrary/gamelogic/GameInstance.java

@@ -83,10 +83,10 @@ public class GameInstance {
     }
 
     /**
-     * Emits an array of {@link Event}s.
+     * Instructs the emitter to emit an array of {@link Event}s.
      * @param events The events to emit
      */
     private void emit(Event... events) {
-        emitter.notifyObservers(events);
+        emitter.update(events);
     }
 }

src/main/java/uulm/teamname/marvelous/gamelibrary/gamelogic/GameLogic.java

@@ -28,7 +28,6 @@ class GameLogic {
     public static ArrayList<Event> executeRequest(GameState state, Request request) {
         ArrayList<Event> result = new ArrayList<>();
 
-        //TODO: refactor for EventBuilder in GameLogic.executeRequest
         switch(request.type) {
             case MeleeAttackRequest, RangedAttackRequest -> {
                 CharacterRequest data = (CharacterRequest)request;

src/main/java/uulm/teamname/marvelous/gamelibrary/gamelogic/GameStateView.java

@@ -14,7 +14,7 @@ public class GameStateView {
 
     /**
      * Constructs a new {@link GameStateView}.
-     * @param state A reference to the state to be viewable
+     * @param state A reference to the {@link GameState} to be viewable
      */
     public GameStateView(GameState state) {
         this.state = state;