addition of PlayerGameModeChangeEvent

By: sunkid <sunkid@iminurnetz.com>

paper-api/src/main/java/org/bukkit/event/Event.java

@@ -301,6 +301,13 @@ public abstract class Event implements Serializable {
          */
         PLAYER_FISH(Category.PLAYER),
 
+        /**
+         * Called when the game mode of a player is changed
+         * 
+         * @see org.bukkit.event.player.PlayerGameModeChangeEvent
+         */
+        PLAYER_GAME_MODE_CHANGE(Category.PLAYER),
+
         /**
          * BLOCK EVENTS
          */

paper-api/src/main/java/org/bukkit/event/player/PlayerGameModeChangeEvent.java

@@ -0,0 +1,28 @@
+package org.bukkit.event.player;
+
+import org.bukkit.GameMode;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
+
+public class PlayerGameModeChangeEvent extends PlayerEvent implements Cancellable {
+
+    private boolean cancelled;
+    private GameMode newGameMode;
+
+    public PlayerGameModeChangeEvent(Player player, GameMode newGameMode) {
+        super(Type.PLAYER_GAME_MODE_CHANGE, player);
+        this.newGameMode = newGameMode;
+    }
+
+    public boolean isCancelled() {
+        return cancelled;
+    }
+
+    public void setCancelled(boolean cancel) {
+        this.cancelled = cancel;
+    }
+
+    public GameMode getNewGameMode() {
+        return newGameMode;
+    }
+}

paper-api/src/main/java/org/bukkit/event/player/PlayerListener.java

@@ -191,4 +191,11 @@ public class PlayerListener implements Listener {
      * @param event Relevant event details
      */
     public void onPlayerFish(PlayerFishEvent event) {}
+    
+    /**
+     * Called when a player's game mode is changed
+     * 
+     * @param event Relevant event details
+     */
+    public void onPlayerGameModeChange(PlayerGameModeChangeEvent event) {}
 }