Show available story dungeons to the player

src/main/java/emu/grasscutter/game/dungeons/DungeonSystem.java

@@ -61,16 +61,27 @@ public class DungeonSystem extends BaseGameSystem {
         }
     }
 
-    public void getEntryInfo(Player player, int pointId) {
-        ScenePointEntry entry = GameData.getScenePointEntryById(player.getScene().getId(), pointId);
-
+    /**
+     * Sends the entry info for the given dungeon point to the player.
+     *
+     * @param player The player to send the entry info to.
+     * @param pointId The dungeon point ID.
+     */
+    public void sendEntryInfoFor(Player player, int pointId) {
+        var entry = GameData.getScenePointEntryById(player.getScene().getId(), pointId);
         if (entry == null) {
-            // Error
+            // An invalid point ID was sent.
             player.sendPacket(new PacketDungeonEntryInfoRsp());
             return;
         }
 
-        player.sendPacket(new PacketDungeonEntryInfoRsp(player, entry.getPointData()));
+        // Check if the player has quests with dungeon IDs.
+        var questDungeons = player.getQuestManager().questsForDungeon(entry);
+        if (questDungeons.size() > 0) {
+            player.sendPacket(new PacketDungeonEntryInfoRsp(entry.getPointData(), questDungeons));
+        } else {
+            player.sendPacket(new PacketDungeonEntryInfoRsp(entry.getPointData()));
+        }
     }
 
     public boolean triggerCondition(

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

@@ -21,8 +21,11 @@ import emu.grasscutter.server.packet.send.PacketDelQuestNotify;
 import emu.grasscutter.server.packet.send.PacketQuestListUpdateNotify;
 import emu.grasscutter.utils.Utils;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import javax.script.Bindings;
+
+import it.unimi.dsi.fastutil.ints.IntIntImmutablePair;
 import lombok.Getter;
 import lombok.Setter;
 import lombok.val;
@@ -281,6 +284,26 @@ public class GameQuest {
         return true;
     }
 
+    /**
+     * @return A list of dungeon IDs associated with the quest's 'QUEST_CONTENT_ENTER_DUNGEON' triggers.
+     *    The first element of the pair is the dungeon ID.
+     *    The second element of the pair is the dungeon's scene point.
+     */
+    public List<IntIntImmutablePair> getDungeonIds() {
+        var conditions = this.getQuestData().getFinishCond().stream()
+            .filter(cond -> cond.getType() == QuestContent.QUEST_CONTENT_ENTER_DUNGEON)
+            .toList();
+
+        return conditions.stream()
+            .map(condition -> {
+                var params = condition.getParam();
+                // The first parameter is the ID of the dungeon.
+                // The second parameter is the dungeon entry's scene point.
+                // ex. [1, 1] = dungeon ID 1, scene point 1 or 'KaeyaDungeon'.
+                return new IntIntImmutablePair(params[0], params[1]);
+            }).toList();
+    }
+
     public void save() {
         getMainQuest().save();
     }

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

@@ -3,6 +3,7 @@ package emu.grasscutter.game.quest;
 import emu.grasscutter.Grasscutter;
 import emu.grasscutter.data.GameData;
 import emu.grasscutter.data.binout.MainQuestData;
+import emu.grasscutter.data.binout.ScenePointEntry;
 import emu.grasscutter.data.excels.QuestData;
 import emu.grasscutter.database.DatabaseHelper;
 import emu.grasscutter.game.player.BasePlayerManager;
@@ -13,6 +14,7 @@ import emu.grasscutter.utils.Position;
 import io.netty.util.concurrent.FastThreadLocalThread;
 import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
 import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
+import it.unimi.dsi.fastutil.ints.IntIntImmutablePair;
 import lombok.Getter;
 import lombok.val;
 
@@ -443,4 +445,35 @@ public class QuestManager extends BasePlayerManager {
     public List<GameMainQuest> getActiveMainQuests() {
         return getMainQuests().values().stream().filter(p -> !p.isFinished()).toList();
     }
+
+    /**
+     * Fetches dungeon IDs for quests which have a dungeon.
+     *
+     * @param point The associated scene point of the dungeon.
+     * @return A list of dungeon IDs, or an empty list if none are found.
+     */
+    public List<Integer> questsForDungeon(ScenePointEntry point) {
+        var pointId = point.getPointData().getId();
+        // Get the active quests.
+        return this.getActiveMainQuests().stream()
+            // Get the sub-quests of the main quest.
+            .map(GameMainQuest::getChildQuests)
+            // Get the values of the sub-quests map.
+            .map(Map::values)
+            .map(quests -> quests.stream()
+                // Get the dungeon IDs of each quest.
+                .map(GameQuest::getDungeonIds)
+                .map(ids -> ids.stream()
+                    // Find entry points which match this dungeon.
+                    .filter(id -> id.rightInt() == pointId)
+                    .toList())
+                .map(ids -> ids.stream()
+                    // Of the remaining dungeons, find the ID of the quest dungeon.
+                    .map(IntIntImmutablePair::leftInt)
+                    .toList())
+                .flatMap(Collection::stream)
+                .toList())
+            .flatMap(Collection::stream)
+            .toList();
+    }
 }