Implement vampire survivor reward chest

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

@@ -0,0 +1,43 @@
+package emu.nebula.server.handlers;
+
+import emu.nebula.net.NetHandler;
+import emu.nebula.net.NetMsgId;
+import emu.nebula.proto.Public.CardInfo;
+import emu.nebula.proto.VampireSurvivorRewardChest.VampireSurvivorRewardChestReq;
+import emu.nebula.proto.VampireSurvivorRewardChest.VampireSurvivorRewardChestResp;
+import emu.nebula.net.HandlerId;
+import emu.nebula.net.GameSession;
+
+@HandlerId(NetMsgId.vampire_survivor_reward_chest_req)
+public class HandlerVampireSurvivorRewardChestReq extends NetHandler {
+
+    @Override
+    public byte[] handle(GameSession session, byte[] message) throws Exception {
+        // Parse req
+        var req = VampireSurvivorRewardChestReq.parseFrom(message);
+        
+        // Sanity check
+        var game = session.getPlayer().getVampireSurvivorManager().getGame();
+        if (game == null) {
+            return session.encodeMsg(NetMsgId.vampire_survivor_reward_chest_failed_ack);
+        }
+        
+        // Calculate rewards from chest
+        var chest = game.calcRewardChest(req.getEventType(), req.getNumber());
+        
+        // Build response
+        var rsp = VampireSurvivorRewardChestResp.newInstance();
+        
+        for (int cardId : chest) {
+            var card = CardInfo.newInstance()
+                    .setId(cardId)
+                    .setNew(true);
+            
+            rsp.addChestCards(card);
+        }
+        
+        // Encode and send
+        return session.encodeMsg(NetMsgId.vampire_survivor_reward_chest_succeed_ack, rsp);
+    }
+
+}