Implement food buffs

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

@@ -76,6 +76,7 @@ public class GameData {
 	private static final ArrayList<CodexReliquaryData> codexReliquaryArrayList = new ArrayList<>();
 	private static final Int2ObjectMap<FetterCharacterCardData> fetterCharacterCardDataMap = new Int2ObjectOpenHashMap<>();
 	private static final Int2ObjectMap<RewardData> rewardDataMap = new Int2ObjectOpenHashMap<>();
+	
 	private static final Int2ObjectMap<WorldAreaData> worldAreaDataMap = new Int2ObjectOpenHashMap<>();
 	private static final Int2ObjectMap<WorldLevelData> worldLevelDataMap = new Int2ObjectOpenHashMap<>();
 	private static final Int2ObjectMap<DailyDungeonData> dailyDungeonDataMap = new Int2ObjectOpenHashMap<>();
@@ -90,6 +91,7 @@ public class GameData {
 	private static final Int2ObjectMap<TowerFloorData> towerFloorDataMap = new Int2ObjectOpenHashMap<>();
 	private static final Int2ObjectMap<TowerLevelData> towerLevelDataMap = new Int2ObjectOpenHashMap<>();
 	private static final Int2ObjectMap<TowerScheduleData> towerScheduleDataMap = new Int2ObjectOpenHashMap<>();
+	private static final Int2ObjectMap<BuffData> buffDataMap = new Int2ObjectOpenHashMap<>();
 	private static final Int2ObjectMap<ForgeData> forgeDataMap = new Int2ObjectOpenHashMap<>();
 	private static final Int2ObjectMap<HomeWorldLevelData> homeWorldLevelDataMap = new Int2ObjectOpenHashMap<>();
 	private static final Int2ObjectMap<FurnitureMakeConfigData> furnitureMakeConfigDataMap = new Int2ObjectOpenHashMap<>();
@@ -448,4 +450,8 @@ public class GameData {
 	public static Int2ObjectMap<CookBonusData> getCookBonusDataMap() {
 		return cookBonusDataMap;
 	}
+
+    public static Int2ObjectMap<BuffData> getBuffDataMap() {
+        return buffDataMap;
+    }
 }

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

@@ -7,6 +7,9 @@ public class ItemUseData {
 	private String[] useParam;
 
 	public ItemUseOp getUseOp() {
+	    if (useOp == null) {
+	        useOp = ItemUseOp.ITEM_USE_NONE;
+	    }
 		return useOp;
 	}
 

src/main/java/emu/grasscutter/data/excels/BuffData.java

@@ -0,0 +1,25 @@
+package emu.grasscutter.data.excels;
+
+import emu.grasscutter.data.GameResource;
+import emu.grasscutter.data.ResourceType;
+import emu.grasscutter.game.props.ServerBuffType;
+import lombok.Getter;
+
+@ResourceType(name = "BuffExcelConfigData.json")
+@Getter
+public class BuffData extends GameResource {
+    private int groupId;
+	private int serverBuffId;
+	private float time;
+	private boolean isPersistent;
+	private ServerBuffType serverBuffType;
+	
+	@Override
+	public int getId() {
+		return this.serverBuffId;
+	}
+	
+	public void onLoad() {
+	    this.serverBuffType = this.serverBuffType != null ? this.serverBuffType : ServerBuffType.SERVER_BUFF_NONE;
+	}
+}

src/main/java/emu/grasscutter/game/player/Player.java

@@ -150,7 +150,8 @@ public class Player {
     @Getter private transient BattlePassManager battlePassManager;
     @Getter private transient CookingManager cookingManager;
     @Getter private transient ActivityManager activityManager;
-
+    @Getter private transient PlayerBuffManager buffManager;
+    
     // Manager data (Save-able to the database)
     private PlayerProfile playerProfile;
     private TeamManager teamManager;
@@ -195,6 +196,7 @@ public class Player {
         this.abilityManager = new AbilityManager(this);
         this.deforestationManager = new DeforestationManager(this);
         this.questManager = new QuestManager(this);
+        this.buffManager = new PlayerBuffManager(this);
         this.position = new Position(GameConstants.START_POSITION);
         this.rotation = new Position(0, 307, 0);
         this.sceneId = 3;
@@ -1182,6 +1184,8 @@ public class Player {
                 it.remove();
             }
         }
+        // Handle buff
+        this.getBuffManager().onTick();
         // Ping
         if (this.getWorld() != null) {
             // RTT notify - very important to send this often

src/main/java/emu/grasscutter/game/player/PlayerBuffManager.java

@@ -0,0 +1,176 @@
+package emu.grasscutter.game.player;
+
+import java.util.LinkedList;
+import java.util.List;
+
+import emu.grasscutter.data.GameData;
+import emu.grasscutter.data.excels.BuffData;
+import emu.grasscutter.net.proto.ServerBuffChangeNotifyOuterClass.ServerBuffChangeNotify.ServerBuffChangeType;
+import emu.grasscutter.net.proto.ServerBuffOuterClass.ServerBuff;
+import emu.grasscutter.server.packet.send.PacketServerBuffChangeNotify;
+
+import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
+import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
+
+import lombok.AccessLevel;
+import lombok.Getter;
+
+@Getter(AccessLevel.PRIVATE)
+public class PlayerBuffManager extends BasePlayerManager {
+    private int nextBuffUid;
+    
+    private final List<PlayerBuff> pendingBuffs;
+    private final Int2ObjectMap<PlayerBuff> buffs; // Server buffs
+    
+    public PlayerBuffManager(Player player) {
+        super(player);
+        this.buffs = new Int2ObjectOpenHashMap<>();
+        this.pendingBuffs = new LinkedList<>();
+    }
+    
+    /**
+     * Gets a new uid for a server buff
+     * @return New integer buff uid
+     */
+    private int getNextBuffUid() {
+        return ++nextBuffUid;
+    }
+    
+    /**
+     * Returns true if the player has a buff with this group id
+     * @param groupId Buff group id
+     * @return True if a buff with this group id exists
+     */
+    public synchronized boolean hasBuff(int groupId) {
+        return this.getBuffs().containsKey(groupId);
+    }
+    
+    /**
+     * Clears all player buffs
+     */
+    public synchronized void clearBuffs() {
+        // Remove from player
+        getPlayer().sendPacket(
+            new PacketServerBuffChangeNotify(getPlayer(), ServerBuffChangeType.SERVER_BUFF_CHANGE_TYPE_DEL_SERVER_BUFF, getBuffs().values())
+        );
+        
+        // Clear
+        getBuffs().clear();
+    }
+    
+    /**
+     * Adds a server buff to the player.
+     * @param buffId Server buff id
+     * @return True if a buff was added
+     */
+    public boolean addBuff(int buffId) {
+        return addBuff(buffId, -1f);
+    }
+    
+    /**
+     * Adds a server buff to the player.
+     * @param buffId Server buff id
+     * @param duration Duration of the buff in seconds. Set to 0 for an infinite buff.
+     * @return True if a buff was added
+     */
+    public synchronized boolean addBuff(int buffId, float duration) {
+        // Get buff excel data
+        BuffData buffData = GameData.getBuffDataMap().get(buffId);
+        if (buffData == null) return false;
+        
+        // Set duration
+        if (duration < 0f) {
+            duration = buffData.getTime();
+        }
+        
+        // Dont add buff if duration is equal or less than 0
+        if (duration <= 0) {
+            return false;
+        }
+        
+        // Clear previous buff if it exists
+        if (this.hasBuff(buffData.getGroupId())) {
+            this.removeBuff(buffData.getGroupId());
+        }
+        
+        // Create and store buff
+        PlayerBuff buff = new PlayerBuff(getNextBuffUid(), buffData, duration);
+        getBuffs().put(buff.getGroupId(), buff);
+        
+        // Packet
+        getPlayer().sendPacket(new PacketServerBuffChangeNotify(getPlayer(), ServerBuffChangeType.SERVER_BUFF_CHANGE_TYPE_ADD_SERVER_BUFF, buff));
+        
+        return true;
+    }
+    
+    /**
+     * Removes a buff by its group id
+     * @param buffGroupId Server buff group id
+     * @return True if a buff was remove
+     */
+    public synchronized boolean removeBuff(int buffGroupId) {
+        PlayerBuff buff = this.getBuffs().get(buffGroupId);
+        
+        if (buff != null) {
+            getPlayer().sendPacket(
+                new PacketServerBuffChangeNotify(getPlayer(), ServerBuffChangeType.SERVER_BUFF_CHANGE_TYPE_DEL_SERVER_BUFF, buff)
+            );
+            return true;
+        }
+        
+        return false;
+    }
+    
+    public synchronized void onTick() {
+        // Skip if no buffs
+        if (getBuffs().size() == 0) return;
+        
+        long currentTime = System.currentTimeMillis();
+        
+        // Add to pending buffs to remove if buff has expired
+        for (PlayerBuff buff : getBuffs().values()) {
+            if (currentTime > buff.getEndTime()) {
+                this.getPendingBuffs().add(buff);
+            }
+        }
+        
+        if (this.getPendingBuffs().size() > 0) {
+            // Send packet
+            getPlayer().sendPacket(
+                new PacketServerBuffChangeNotify(getPlayer(), ServerBuffChangeType.SERVER_BUFF_CHANGE_TYPE_DEL_SERVER_BUFF, this.pendingBuffs)
+            );
+            
+            // Remove buff from player buff map
+            for (PlayerBuff buff : this.getPendingBuffs()) {
+                getBuffs().remove(buff.getGroupId());
+            }
+            this.getPendingBuffs().clear();
+        }
+    }
+    
+    @Getter
+    public static class PlayerBuff {
+        private final int uid;
+        private final BuffData buffData;
+        private final long endTime;
+        
+        public PlayerBuff(int uid, BuffData buffData, float duration) {
+            this.uid = uid;
+            this.buffData = buffData;
+            this.endTime = System.currentTimeMillis() + ((long) duration * 1000);
+        }
+        
+        public int getGroupId() {
+            return getBuffData().getGroupId();
+        }
+
+        public ServerBuff toProto() {
+            return ServerBuff.newBuilder()
+                .setServerBuffUid(this.getUid())
+                .setServerBuffId(this.getBuffData().getId())
+                .setServerBuffType(this.getBuffData().getServerBuffType().getValue())
+                .setInstancedModifierId(1)
+                .build();
+        }
+    }
+}

src/main/java/emu/grasscutter/game/props/ServerBuffType.java

@@ -0,0 +1,34 @@
+package emu.grasscutter.game.props;
+
+import java.util.stream.Stream;
+
+import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
+import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
+
+public enum ServerBuffType {
+    SERVER_BUFF_NONE (0),
+    SERVER_BUFF_AVATAR (1),
+    SERVER_BUFF_TEAM (2),
+    SERVER_BUFF_TOWER (3);
+	
+	private final int value;
+	private static final Int2ObjectMap<ServerBuffType> map = new Int2ObjectOpenHashMap<>();
+	
+	static {
+		Stream.of(values()).forEach(e -> {
+			map.put(e.getValue(), e);
+		});
+	}
+	
+	private ServerBuffType(int value) {
+		this.value = value;
+	}
+
+	public int getValue() {
+		return value;
+	}
+	
+	public static ServerBuffType getTypeByValue(int value) {
+		return map.getOrDefault(value, SERVER_BUFF_NONE);
+	}
+}

src/main/java/emu/grasscutter/game/systems/InventorySystem.java

@@ -10,6 +10,7 @@ import emu.grasscutter.data.GameData;
 import emu.grasscutter.data.binout.OpenConfigEntry;
 import emu.grasscutter.data.binout.OpenConfigEntry.SkillPointModifier;
 import emu.grasscutter.data.common.ItemParamData;
+import emu.grasscutter.data.common.ItemUseData;
 import emu.grasscutter.data.excels.AvatarPromoteData;
 import emu.grasscutter.data.excels.AvatarSkillData;
 import emu.grasscutter.data.excels.AvatarSkillDepotData;
@@ -821,6 +822,8 @@ public class InventorySystem extends BaseGameSystem {
                     }
 
                     used = player.getTeamManager().reviveAvatar(target) ? 1 : 0;
+                } else {
+                    used = 1;
                 }
                 break;
             case MATERIAL_NOTICE_ADD_HP:
@@ -940,9 +943,24 @@ public class InventorySystem extends BaseGameSystem {
         // If we used at least one item, or one of the methods called here reports using the item successfully,
         // we return the item to make UseItemRsp a success.
         if (used > 0) {
+            // Handle use params, mainly server buffs
+            for (ItemUseData useData : useItem.getItemData().getItemUse()) {
+                switch (useData.getUseOp()) {
+                    case ITEM_USE_ADD_SERVER_BUFF -> {
+                        int buffId = Integer.parseInt(useData.getUseParam()[0]);
+                        float time = Float.parseFloat(useData.getUseParam()[1]);
+                        
+                        player.getBuffManager().addBuff(buffId, time);
+                    }
+                    default -> {}
+                }
+            }
+            
+            // Remove item from inventory since we used it
             player.getInventory().removeItem(useItem, used);
             return useItem;
         }
+        
         if (useSuccess) {
             return useItem;
         }

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

@@ -0,0 +1,44 @@
+package emu.grasscutter.server.packet.send;
+
+import java.util.Collection;
+
+import emu.grasscutter.game.entity.EntityAvatar;
+import emu.grasscutter.game.player.Player;
+import emu.grasscutter.game.player.PlayerBuffManager.PlayerBuff;
+import emu.grasscutter.net.packet.BasePacket;
+import emu.grasscutter.net.packet.PacketOpcodes;
+import emu.grasscutter.net.proto.ServerBuffChangeNotifyOuterClass.ServerBuffChangeNotify;
+import emu.grasscutter.net.proto.ServerBuffChangeNotifyOuterClass.ServerBuffChangeNotify.ServerBuffChangeType;
+
+public class PacketServerBuffChangeNotify extends BasePacket {
+	
+	public PacketServerBuffChangeNotify(Player player, ServerBuffChangeType changeType, PlayerBuff buff) {
+		super(PacketOpcodes.ServerBuffChangeNotify);
+
+		var proto = ServerBuffChangeNotify.newBuilder();
+		
+		for (EntityAvatar entity : player.getTeamManager().getActiveTeam()) {
+		    proto.addAvatarGuidList(entity.getAvatar().getGuid());
+		}
+		
+		proto.setServerBuffChangeType(changeType);
+		proto.addServerBuffList(buff.toProto());
+		
+		this.setData(proto);
+	}
+	
+	public PacketServerBuffChangeNotify(Player player, ServerBuffChangeType changeType, Collection<PlayerBuff> buffs) {
+        super(PacketOpcodes.ServerBuffChangeNotify);
+
+        var proto = ServerBuffChangeNotify.newBuilder();
+        
+        for (EntityAvatar entity : player.getTeamManager().getActiveTeam()) {
+            proto.addAvatarGuidList(entity.getAvatar().getGuid());
+        }
+        
+        proto.setServerBuffChangeType(changeType);
+        proto.addAllServerBuffList(buffs.stream().map(PlayerBuff::toProto).toList());
+        
+        this.setData(proto);
+    }
+}