Create player creation event & move join event to player

src/main/java/emu/grasscutter/game/player/Player.java

@@ -37,6 +37,7 @@ import emu.grasscutter.net.proto.PlayerWorldLocationInfoOuterClass;
 import emu.grasscutter.net.proto.ProfilePictureOuterClass.ProfilePicture;
 import emu.grasscutter.net.proto.SocialDetailOuterClass.SocialDetail;
 import emu.grasscutter.net.proto.SocialShowAvatarInfoOuterClass;
+import emu.grasscutter.server.event.game.PlayerJoinEvent;
 import emu.grasscutter.server.event.game.PlayerQuitEvent;
 import emu.grasscutter.server.event.player.PlayerReceiveMailEvent;
 import emu.grasscutter.server.game.GameServer;
@@ -1014,6 +1015,11 @@ public class Player {
 
 		// First notify packets sent
 		this.setHasSentAvatarDataNotify(true);
+
+		// Call join event.
+		PlayerJoinEvent event = new PlayerJoinEvent(this); event.call();
+		if(event.isCanceled()) // If event is not cancelled, continue.
+			session.close();
 	}
 
 	public void onLogout() {

src/main/java/emu/grasscutter/server/event/game/PlayerCreationEvent.java

@@ -0,0 +1,27 @@
+package emu.grasscutter.server.event.game;
+
+import emu.grasscutter.game.player.Player;
+import emu.grasscutter.server.event.types.GameEvent;
+import emu.grasscutter.server.game.GameSession;
+
+public final class PlayerCreationEvent extends GameEvent {
+    private final GameSession session;
+    private Class<? extends Player> playerClass;
+    
+    public PlayerCreationEvent(GameSession session, Class<? extends Player> playerClass) {
+        this.session = session;
+        this.playerClass = playerClass;
+    }
+    
+    public GameSession getSession() {
+        return this.session;
+    }
+    
+    public void setPlayerClass(Class<? extends Player> playerClass) {
+        this.playerClass = playerClass;
+    }
+    
+    public Class<? extends Player> getPlayerClass() {
+        return this.playerClass;
+    }
+}

src/main/java/emu/grasscutter/server/packet/recv/HandlerSetPlayerBornDataReq.java

@@ -13,7 +13,7 @@ import emu.grasscutter.net.packet.Opcodes;
 import emu.grasscutter.net.packet.PacketOpcodes;
 import emu.grasscutter.net.proto.SetPlayerBornDataReqOuterClass.SetPlayerBornDataReq;
 import emu.grasscutter.net.packet.PacketHandler;
-import emu.grasscutter.server.event.game.PlayerJoinEvent;
+import emu.grasscutter.server.event.game.PlayerCreationEvent;
 import emu.grasscutter.server.game.GameSession;
 import emu.grasscutter.server.game.GameSession.SessionState;
 
@@ -40,8 +40,10 @@ public class HandlerSetPlayerBornDataReq extends PacketHandler {
 			nickname = "Traveler";
 		}
 		
-		// Create character
+		// Call creation event.
-		Player player = new Player(session);
+		PlayerCreationEvent event = new PlayerCreationEvent(session, Player.class); event.call();
+		// Create player instance from event.
+		Player player = event.getPlayerClass().getDeclaredConstructor(GameSession.class).newInstance(session);
 		player.setNickname(nickname);
 		
 		try {
@@ -92,10 +94,5 @@ public class HandlerSetPlayerBornDataReq extends PacketHandler {
 			Grasscutter.getLogger().error("Error creating player object: ", e);
 			session.close();
 		}
-
-		// Call join event.
-		PlayerJoinEvent event = new PlayerJoinEvent(player); event.call();
-		if(event.isCanceled()) // If event is not cancelled, continue.
-			session.close();
 	}
 }