Notify client of unlocked recipies on login.

src/main/java/emu/grasscutter/game/managers/CookingManager.java

+package emu.grasscutter.game.managers;
+
+import java.util.ArrayList;
+import java.util.Dictionary;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+import emu.grasscutter.data.GameData;
+import emu.grasscutter.game.player.Player;
+import emu.grasscutter.net.proto.CookRecipeDataOuterClass;
+import emu.grasscutter.server.packet.send.PacketCookDataNotify;
+
+public class CookingManager {
+    private static Set<Integer> defaultUnlockedRecipies;
+    private final Player player;
+
+    public CookingManager(Player player) {
+        this.player = player;
+    }
+
+    public static void initialize() {
+        // Initialize the set of recipies that are unlocked by default.
+        defaultUnlockedRecipies = new HashSet<>();
+
+        for (var recipe : GameData.getCookRecipeDataMap().values()) {
+            if (recipe.isDefaultUnlocked()) {
+                defaultUnlockedRecipies.add(recipe.getId());
+            }
+        }
+    }
+
+    /********************
+     * Perform cooking.
+     ********************/
+    
+
+     /********************
+     * Notify unlocked recipies.
+     ********************/
+    private void addDefaultUnlocked() {
+        // Get recipies that are already unlocked.
+        var unlockedRecipies = this.player.getUnlockedRecipies();
+
+        // Get recipies that should be unlocked by default but aren't.
+        var additionalRecipies = new HashSet<>(defaultUnlockedRecipies);
+        additionalRecipies.removeAll(unlockedRecipies.keySet());
+
+        // Add them to the player.
+        for (int id : additionalRecipies) {
+            unlockedRecipies.put(id, 0);
+        }
+    }
+
+    public void sendCookDataNofity() {
+        // Default unlocked recipies to player if they don't have them yet.
+        this.addDefaultUnlocked();
+
+        // Get unlocked recipies.
+        var unlockedRecipies = this.player.getUnlockedRecipies();
+
+        // Construct CookRecipeData protos.
+        List<CookRecipeDataOuterClass.CookRecipeData> data = new ArrayList<>();
+        for (var recipe : unlockedRecipies.entrySet()) {
+            int recipeId = recipe.getKey();
+            int proficiency = recipe.getValue();
+
+            CookRecipeDataOuterClass.CookRecipeData proto = CookRecipeDataOuterClass.CookRecipeData.newBuilder()
+                .setRecipeId(recipeId)
+                .setProficiency(proficiency)
+                .build();
+            data.add(proto);
+        }
+
+        // Send packet.
+        this.player.sendPacket(new PacketCookDataNotify(data));
+    }
+}

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

@@ -30,6 +30,7 @@ import emu.grasscutter.game.inventory.GameItem;
 import emu.grasscutter.game.inventory.Inventory;
 import emu.grasscutter.game.mail.Mail;
 import emu.grasscutter.game.mail.MailHandler;
+import emu.grasscutter.game.managers.CookingManager;
 import emu.grasscutter.game.managers.FurnitureManager;
 import emu.grasscutter.game.managers.InsectCaptureManager;
 import emu.grasscutter.game.managers.ResinManager;
@@ -113,6 +114,7 @@ public class Player {
 	private Set<Integer> unlockedFurniture;
 	private Set<Integer> unlockedFurnitureSuite;
 	private List<ActiveForgeData> activeForges;
+	private Map<Integer, Integer> unlockedRecipies;
 
 	private Integer widgetId;
 
@@ -184,6 +186,8 @@ public class Player {
 	@Transient private GameHome home;
 	@Transient private FurnitureManager furnitureManager;
 	@Transient private BattlePassManager battlePassManager;
+	@Transient private CookingManager cookingManager;
+	// @Transient private 
 	@Getter @Transient private ActivityManager activityManager;
 
 	@Transient private CollectionManager collectionManager;
@@ -228,6 +232,7 @@ public class Player {
 		this.unlockedFurniture = new HashSet<>();
 		this.unlockedFurnitureSuite = new HashSet<>();
 		this.activeForges = new ArrayList<>();
+		this.unlockedRecipies = new HashMap<>();
 
 		this.setSceneId(3);
 		this.setRegionId(1);
@@ -254,6 +259,7 @@ public class Player {
 		this.resinManager = new ResinManager(this);
 		this.forgingManager = new ForgingManager(this);
 		this.furnitureManager = new FurnitureManager(this);
+		this.cookingManager = new CookingManager(this);
 	}
 
 	// On player creation
@@ -288,6 +294,7 @@ public class Player {
 		this.deforestationManager = new DeforestationManager(this);
 		this.forgingManager = new ForgingManager(this);
 		this.furnitureManager = new FurnitureManager(this);
+		this.cookingManager = new CookingManager(this);
 	}
 
 	public int getUid() {
@@ -666,6 +673,10 @@ public class Player {
 		return this.activeForges;
 	}
 
+	public Map<Integer, Integer> getUnlockedRecipies() {
+		return this.unlockedRecipies;
+	}
+
 	public MpSettingType getMpSetting() {
 		return MpSettingType.MP_SETTING_TYPE_ENTER_AFTER_APPLY; // TEMP
 	}
@@ -1298,6 +1309,10 @@ public class Player {
 		return battlePassManager;
 	}
 
+	public CookingManager getCookingManager() {
+		return cookingManager;
+	}
+
 	public void loadBattlePassManager() {
 		if (this.battlePassManager != null) return;
 		this.battlePassManager = DatabaseHelper.loadBattlePass(this);
@@ -1506,6 +1521,7 @@ public class Player {
 		session.send(new PacketCombineDataNotify(this.unlockedCombines));
 		this.forgingManager.sendForgeDataNotify();
 		this.resinManager.onPlayerLogin();
+		this.cookingManager.sendCookDataNofity();
 		getTodayMoonCard(); // The timer works at 0:0, some users log in after that, use this method to check if they have received a reward today or not. If not, send the reward.
 
 		// Battle Pass trigger

src/main/java/emu/grasscutter/server/game/GameServer.java

@@ -12,6 +12,7 @@ import emu.grasscutter.game.dungeons.DungeonManager;
 import emu.grasscutter.game.dungeons.challenge.DungeonChallenge;
 import emu.grasscutter.game.expedition.ExpeditionManager;
 import emu.grasscutter.game.gacha.GachaManager;
+import emu.grasscutter.game.managers.CookingManager;
 import emu.grasscutter.game.managers.InventoryManager;
 import emu.grasscutter.game.managers.MultiplayerManager;
 import emu.grasscutter.game.managers.chat.ChatManager;
@@ -88,6 +89,7 @@ public final class GameServer extends KcpServer {
 		DungeonChallenge.initialize();
 		EnergyManager.initialize();
 		StaminaManager.initialize();
+		CookingManager.initialize();
 
 		this.address = address;
 		this.packetHandler = new GameServerPacketHandler(PacketHandler.class);

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

+package emu.grasscutter.server.packet.send;
+
+import java.util.List;
+
+import emu.grasscutter.net.packet.BasePacket;
+import emu.grasscutter.net.packet.PacketOpcodes;
+import emu.grasscutter.net.proto.CookDataNotifyOuterClass.CookDataNotify;
+import emu.grasscutter.net.proto.CookRecipeDataOuterClass.CookRecipeData;
+
+public class PacketCookDataNotify extends BasePacket {
+    
+    public PacketCookDataNotify(List<CookRecipeData> recipies) {
+        super(PacketOpcodes.CookDataNotify);
+
+        CookDataNotify proto = CookDataNotify.newBuilder()
+                .addAllRecipeDataList(recipies)
+                .build();
+        
+        this.setData(proto);
+    }
+}