Implement compose items

src/main/java/emu/lunarcore/data/GameData.java

@@ -29,6 +29,7 @@ public class GameData {
     @Getter private static Int2ObjectMap<MapEntranceExcel> mapEntranceExcelMap = new Int2ObjectOpenHashMap<>();
     @Getter private static Int2ObjectMap<HeroExcel> heroExcelMap = new Int2ObjectOpenHashMap<>();
     @Getter private static Int2ObjectMap<ShopExcel> shopExcelMap = new Int2ObjectOpenHashMap<>();
+    @Getter private static Int2ObjectMap<ItemComposeExcel> itemComposeExcelMap = new Int2ObjectOpenHashMap<>();
     
     @Getter private static Int2ObjectMap<ChallengeExcel> challengeExcelMap = new Int2ObjectOpenHashMap<>();
     @Getter private static Int2ObjectMap<ChallengeTargetExcel> challengeTargetExcelMap = new Int2ObjectOpenHashMap<>();

src/main/java/emu/lunarcore/data/excel/ItemComposeExcel.java

@@ -0,0 +1,31 @@
+package emu.lunarcore.data.excel;
+
+import java.util.List;
+
+import emu.lunarcore.data.GameResource;
+import emu.lunarcore.data.ResourceType;
+import emu.lunarcore.data.common.ItemParam;
+
+import lombok.Getter;
+
+@Getter
+@ResourceType(name = {"ItemComposeConfig.json"})
+public class ItemComposeExcel extends GameResource {
+    private int ID;
+    private int ItemID;
+    private FormulaType FormulaType;
+    private List<ItemParam> MaterialCost;
+    private int[] SpecialMaterialCost;
+    private int CoinCost;
+    private int WorldLevelRequire;
+    private int[] RelicList;
+    
+    @Override
+    public int getId() {
+        return ID;
+    }
+
+    public enum FormulaType {
+        Unknown, Normal, Sepcial, SelectedRelic;
+    }
+}

src/main/java/emu/lunarcore/game/service/InventoryService.java

@@ -7,6 +7,7 @@ import java.util.List;
 import emu.lunarcore.data.GameData;
 import emu.lunarcore.data.common.ItemParam;
 import emu.lunarcore.data.excel.*;
+import emu.lunarcore.data.excel.ItemComposeExcel.FormulaType;
 import emu.lunarcore.game.avatar.GameAvatar;
 import emu.lunarcore.game.inventory.GameItem;
 import emu.lunarcore.game.player.Player;
@@ -585,4 +586,42 @@ public class InventoryService extends BaseGameService {
         
         return items;
     }
+    
+    public List<GameItem> composeItem(Player player, int composeId, int count) {
+        // Sanity check
+        if (count <= 0) return null;
+        
+        // Get item compose excel data
+        ItemComposeExcel excel = GameData.getItemComposeExcelMap().get(composeId);
+        if (excel == null || excel.getFormulaType() != FormulaType.Normal) {
+            return null;
+        }
+        
+        // Verify items
+        for (ItemParam param : excel.getMaterialCost()) {
+            GameItem item = player.getInventory().getItemByParam(param);
+            if (item == null || item.getCount() < param.getCount() * count) {
+                return null;
+            }
+        }
+
+        // Verify credits
+        if (player.getScoin() < excel.getCoinCost() * count) {
+            return null;
+        }
+        
+        // Pay items
+        player.getInventory().removeItemsByParams(excel.getMaterialCost(), count);
+        player.addSCoin(-excel.getCoinCost() * count);
+        
+        // Compose item
+        List<GameItem> items = new ArrayList<>();
+        GameItem item = new GameItem(excel.getItemID(), count);
+        items.add(item);
+        
+        // Add items to inventory
+        player.getInventory().addItems(items);
+        
+        return items;
+    }
 }

src/main/java/emu/lunarcore/server/packet/recv/HandlerComposeItemCsReq.java

@@ -0,0 +1,29 @@
+package emu.lunarcore.server.packet.recv;
+
+import java.util.List;
+
+import emu.lunarcore.game.inventory.GameItem;
+import emu.lunarcore.proto.ComposeItemCsReqOuterClass.ComposeItemCsReq;
+import emu.lunarcore.server.game.GameSession;
+import emu.lunarcore.server.packet.CmdId;
+import emu.lunarcore.server.packet.Opcodes;
+import emu.lunarcore.server.packet.PacketHandler;
+import emu.lunarcore.server.packet.send.PacketComposeItemScRsp;
+
+@Opcodes(CmdId.ComposeItemCsReq)
+public class HandlerComposeItemCsReq extends PacketHandler {
+
+    @Override
+    public void handle(GameSession session, byte[] header, byte[] data) throws Exception {
+        var req = ComposeItemCsReq.parseFrom(data);
+        
+        List<GameItem> returnList = session.getServer().getInventoryService().composeItem(
+                session.getPlayer(), 
+                req.getComposeId(), 
+                req.getCount()
+        );
+        
+        session.send(new PacketComposeItemScRsp(req.getComposeId(), req.getCount(), returnList));
+    }
+
+}

src/main/java/emu/lunarcore/server/packet/send/PacketComposeItemScRsp.java

@@ -0,0 +1,29 @@
+package emu.lunarcore.server.packet.send;
+
+import java.util.Collection;
+
+import emu.lunarcore.game.inventory.GameItem;
+import emu.lunarcore.proto.ComposeItemScRspOuterClass.ComposeItemScRsp;
+import emu.lunarcore.server.packet.BasePacket;
+import emu.lunarcore.server.packet.CmdId;
+
+public class PacketComposeItemScRsp extends BasePacket {
+
+    public PacketComposeItemScRsp(int composeId, int count, Collection<GameItem> returnList) {
+        super(CmdId.ComposeItemScRsp);
+
+        var data = ComposeItemScRsp.newInstance()
+                .setComposeId(composeId)
+                .setCount(count);
+        
+        if (returnList != null) {
+            for (var item : returnList) {
+                data.getMutableReturnItemList().addItemList(item.toProto());
+            }
+        } else {
+            data.getMutableReturnItemList();
+        }
+        
+        this.setData(data);
+    }
+}