Player level reward

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

+package emu.grasscutter.server.packet.recv;
+
+import java.util.LinkedList;
+import java.util.List;
+
+import emu.grasscutter.data.GenshinData;
+import emu.grasscutter.data.common.RewardItemData;
+import emu.grasscutter.game.inventory.GenshinItem;
+import emu.grasscutter.game.props.ActionReason;
+import emu.grasscutter.net.packet.Opcodes;
+import emu.grasscutter.net.packet.PacketHandler;
+import emu.grasscutter.net.packet.PacketOpcodes;
+import emu.grasscutter.net.proto.TakePlayerLevelRewardReqOuterClass.TakePlayerLevelRewardReq;
+import emu.grasscutter.server.game.GameSession;
+import emu.grasscutter.server.packet.send.PacketItemAddHintNotify;
+import emu.grasscutter.server.packet.send.PacketTakePlayerLevelRewardRsp;
+
+@Opcodes(PacketOpcodes.TakePlayerLevelRewardReq)
+public class HandlerTakePlayerLevelRewardReq extends PacketHandler {
+    @Override
+    public void handle(GameSession session, byte[] header, byte[] payload) throws Exception {
+        TakePlayerLevelRewardReq req = TakePlayerLevelRewardReq.parseFrom(payload);
+
+        int level = req.getLevel();
+        int rewardId = GenshinData.getPlayerLevelDataMap().get(level).getRewardId();
+
+        if (rewardId != 0) {
+            List<RewardItemData> rewardItems = GenshinData.getRewardDataMap().get(rewardId).getRewardItemList();
+            List<GenshinItem> items = new LinkedList<>();
+            for (RewardItemData rewardItem : rewardItems) {
+                if (rewardItem != null) {
+                    if (rewardItem.getItemId() != 0) {
+                        items.add(new GenshinItem(rewardItem.getItemId(), rewardItem.getItemCount()));
+                    }
+                }
+            }
+            session.getPlayer().getInventory().addItems(items);
+            session.getPlayer().sendPacket(new PacketItemAddHintNotify(items, ActionReason.PlayerUpgradeReward));
+        }
+
+        session.send(new PacketTakePlayerLevelRewardRsp(level, rewardId));
+    }
+}

src/main/java/emu/grasscutter/server/packet/send/PacketTakePlayerLevelRewardRsp.java

+package emu.grasscutter.server.packet.send;
+
+import emu.grasscutter.net.packet.GenshinPacket;
+import emu.grasscutter.net.packet.PacketOpcodes;
+import emu.grasscutter.net.proto.TakePlayerLevelRewardRspOuterClass.TakePlayerLevelRewardRsp;
+
+public class PacketTakePlayerLevelRewardRsp extends GenshinPacket {
+
+    public PacketTakePlayerLevelRewardRsp(int level, int rewardId) {
+		super(PacketOpcodes.TakePlayerLevelRewardRsp);
+        
+        int retcode = 0;
+
+        if (rewardId == 0) {
+            retcode = 1;
+        }
+
+        TakePlayerLevelRewardRsp proto = TakePlayerLevelRewardRsp.newBuilder()
+                .setLevel(level)
+                .setRewardId(rewardId)
+                .setRetcode(retcode)
+                .build();
+
+		this.setData(proto);
+	}
+}