feat(multiplayer): 增加房间用户添加功能并优化房间模型

- 新增 APIUser 模型用于表示房间内的用户
- 扩展 MultiplayerRoom 模型以支持更多房间相关功能
- 添加用户加入房间的路由和相关逻辑
- 优化 Room 模型，增加从 MultiplayerRoom 转换的方法

app/router/room.py

@@ -2,7 +2,11 @@ from __future__ import annotations
 
 from app.database.room import RoomIndex
 from app.dependencies.database import get_db, get_redis
-from app.models.room import Room
+from app.models.room import (
+    MultiplayerRoom,
+    MultiplayerRoomUser,
+    Room,
+)
 
 from .api_router import router
 
@@ -27,9 +31,37 @@ async def get_all_rooms(
         for room_index in all_room_ids:
             dumped_room = redis.get(str(room_index.id))
             if dumped_room:
-                actual_room = Room.model_validate_json(str(dumped_room))
+                actual_room = MultiplayerRoom.model_validate_json(str(dumped_room))
+                actual_room = Room.from_MultiplayerRoom(actual_room)
                 if actual_room.status == status and actual_room.category == category:
                     roomsList.append(actual_room)
         return roomsList
     else:
         raise HTTPException(status_code=500, detail="Redis Error")
+
+
+@router.put("/rooms/{room}/users/{user}", tags=["rooms"], response_model=Room)
+async def add_user_to_room(
+    room: int, user: int, password: str, db: AsyncSession = Depends(dependency=get_db)
+):
+    redis = get_redis()
+    if redis:
+        dumped_room = redis.get(str(room))
+        if not dumped_room:
+            raise HTTPException(status_code=404, detail="房间不存在")
+        actual_room = MultiplayerRoom.model_validate_json(str(dumped_room))
+
+        # 验证密码
+        if password != actual_room.settings.password:
+            raise HTTPException(status_code=403, detail="Invalid password")
+
+        # 继续处理加入房间的逻辑
+        actual_room.users.append(
+            MultiplayerRoomUser(
+                id=user, matchState=None, rulesetId=None, beatmapId=None
+            )
+        )
+        actual_room = Room.from_MultiplayerRoom(actual_room)
+        return actual_room
+    else:
+        raise HTTPException(status_code=500, detail="Redis Error")