Implement quest rewards

src/main/java/emu/grasscutter/data/common/ItemParamData.java

 package emu.grasscutter.data.common;
 
+import com.google.gson.annotations.SerializedName;
+
 public class ItemParamData {
+	@SerializedName(value="Id", alternate={"ItemId"})
 	private int Id;
+	
+	@SerializedName(value="Count", alternate={"ItemCount"})
     private int Count;
 
     public ItemParamData() {}
@@ -14,7 +19,15 @@ public class ItemParamData {
 		return Id;
 	}
 	
+	public int getItemId() {
+		return Id;
+	}
+	
 	public int getCount() {
 		return Count;
 	}
+	
+	public int getItemCount() {
+		return Count;
+	}
 }

src/main/java/emu/grasscutter/data/common/RewardItemData.java

-package emu.grasscutter.data.common;
-
-public class RewardItemData {
-    private int ItemId;
-    private int ItemCount;
-
-    public int getItemId() {
-        return ItemId;
-    }
-
-    public void setItemId(int itemId) {
-        ItemId = itemId;
-    }
-
-    public int getItemCount() {
-        return ItemCount;
-    }
-
-    public void setItemCount(int itemCount) {
-        ItemCount = itemCount;
-    }
-}

src/main/java/emu/grasscutter/data/def/RewardData.java

@@ -4,24 +4,24 @@ import java.util.List;
 
 import emu.grasscutter.data.GameResource;
 import emu.grasscutter.data.ResourceType;
-import emu.grasscutter.data.common.RewardItemData;
+import emu.grasscutter.data.common.ItemParamData;
 
 @ResourceType(name = "RewardExcelConfigData.json")
 public class RewardData extends GameResource {
     public int RewardId;
-    public List<RewardItemData> RewardItemList;
+    public List<ItemParamData> RewardItemList;
 
     @Override
 	public int getId() {
 		return RewardId;
 	}
 
-    public List<RewardItemData> getRewardItemList() {
+    public List<ItemParamData> getRewardItemList() {
         return RewardItemList;
     }
 
     @Override
     public void onLoad() {
-
+    	RewardItemList = RewardItemList.stream().filter(i -> i.getId() > 0).toList();
     }
 }

src/main/java/emu/grasscutter/game/inventory/Inventory.java

@@ -150,6 +150,14 @@ public class Inventory implements Iterable<GameItem> {
 		addItems(items.stream().map(param -> new GameItem(param.getItemId(), param.getCount())).toList(), null);
 	}
 	
+	public void addItemParamDatas(Collection<ItemParamData> items) {
+		addItemParamDatas(items, null);
+	}
+	
+	public void addItemParamDatas(Collection<ItemParamData> items, ActionReason reason) {
+		addItems(items.stream().map(param -> new GameItem(param.getItemId(), param.getCount())).toList(), reason);
+	}
+	
 	private synchronized GameItem putItem(GameItem item) {
 		// Dont add items that dont have a valid item definition.
 		if (item.getItemData() == null) {

src/main/java/emu/grasscutter/game/quest/GameMainQuest.java

@@ -11,8 +11,11 @@ import dev.morphia.annotations.Id;
 import dev.morphia.annotations.Indexed;
 import dev.morphia.annotations.Transient;
 import emu.grasscutter.data.GameData;
+import emu.grasscutter.data.custom.MainQuestData;
+import emu.grasscutter.data.def.RewardData;
 import emu.grasscutter.database.DatabaseHelper;
 import emu.grasscutter.game.player.Player;
+import emu.grasscutter.game.props.ActionReason;
 import emu.grasscutter.game.quest.enums.ParentQuestState;
 import emu.grasscutter.game.quest.enums.QuestState;
 import emu.grasscutter.net.proto.ChildQuestOuterClass.ChildQuest;
@@ -91,9 +94,23 @@ public class GameMainQuest {
 	public void finish() {
 		this.isFinished = true;
 		this.state = ParentQuestState.PARENT_QUEST_STATE_FINISHED;
+		
 		this.getOwner().getSession().send(new PacketFinishedParentQuestUpdateNotify(this));
 		this.getOwner().getSession().send(new PacketCodexDataUpdateNotify(this));
+		
 		this.save();
+		
+		// Add rewards
+		MainQuestData mainQuestData = GameData.getMainQuestDataMap().get(this.getParentQuestId());
+		for (int rewardId : mainQuestData.getRewardIdList()) {
+			RewardData rewardData = GameData.getRewardDataMap().get(rewardId);
+			
+			if (rewardData == null) {
+				continue;
+			}
+			
+			getOwner().getInventory().addItemParamDatas(rewardData.getRewardItemList(), ActionReason.QuestReward);
+		}
 	}
 
 	public void save() {

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

@@ -6,7 +6,8 @@ import java.util.Set;
 
 import emu.grasscutter.Grasscutter;
 import emu.grasscutter.data.GameData;
-import emu.grasscutter.data.common.RewardItemData;
+import emu.grasscutter.data.common.ItemParamData;
+
 import emu.grasscutter.game.inventory.GameItem;
 import emu.grasscutter.game.props.ActionReason;
 import emu.grasscutter.net.packet.Opcodes;
@@ -27,17 +28,8 @@ public class HandlerTakePlayerLevelRewardReq extends PacketHandler {
         int rewardId = GameData.getPlayerLevelDataMap().get(level).getRewardId();
 
         if (rewardId != 0) {
-            List<RewardItemData> rewardItems = GameData.getRewardDataMap().get(rewardId).getRewardItemList();
-            List<GameItem> items = new LinkedList<>();
-            for (RewardItemData rewardItem : rewardItems) {
-                if (rewardItem != null) {
-                    if (rewardItem.getItemId() != 0) {
-                        items.add(new GameItem(rewardItem.getItemId(), rewardItem.getItemCount()));
-                    }
-                }
-            }
-            session.getPlayer().getInventory().addItems(items);
-            session.getPlayer().sendPacket(new PacketItemAddHintNotify(items, ActionReason.PlayerUpgradeReward));
+            List<ItemParamData> rewardItems = GameData.getRewardDataMap().get(rewardId).getRewardItemList();
+            session.getPlayer().getInventory().addItemParamDatas(rewardItems, ActionReason.PlayerUpgradeReward);
             Set<Integer> rewardedLevels = session.getPlayer().getRewardedLevels();
             rewardedLevels.add(level);
             session.getPlayer().setRewardedLevels(rewardedLevels);