Implement new event

src/main/java/emu/nebula/server/handlers/HandlerActivityLevelsApplyReq.java

@@ -0,0 +1,36 @@
+package emu.nebula.server.handlers;
+
+import emu.nebula.net.NetHandler;
+import emu.nebula.net.NetMsgId;
+import emu.nebula.proto.ActivityLevelsApply.ActivityLevelsApplyReq;
+import emu.nebula.net.HandlerId;
+import emu.nebula.game.activity.type.LevelsActivity;
+import emu.nebula.net.GameSession;
+
+@HandlerId(NetMsgId.activity_levels_apply_req)
+public class HandlerActivityLevelsApplyReq extends NetHandler {
+
+    @Override
+    public byte[] handle(GameSession session, byte[] message) throws Exception {
+        // Parse req
+        var req = ActivityLevelsApplyReq.parseFrom(message);
+        
+        // Get activity
+        var activity = session.getPlayer().getActivityManager().getActivity(LevelsActivity.class, req.getActivityId());
+        
+        if (activity == null) {
+            return session.encodeMsg(NetMsgId.activity_levels_apply_failed_ack);
+        }
+        
+        // Apply
+        boolean success = activity.apply(req.getLevelId(), req.getBuildId());
+
+        if (success == false) {
+            return session.encodeMsg(NetMsgId.activity_levels_apply_failed_ack);
+        }
+        
+        // Encode and send
+        return session.encodeMsg(NetMsgId.activity_levels_apply_succeed_ack);
+    }
+
+}