优化mongodb配置获取逻辑，移动存储基类位置。

database/mongodb_store_base.py

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+# -*- coding: utf-8 -*-
+"""MongoDB存储基类：提供连接管理和通用存储方法"""
+import asyncio
+from typing import Dict, List, Optional
+from motor.motor_asyncio import AsyncIOMotorClient, AsyncIOMotorDatabase, AsyncIOMotorCollection
+from config import db_config
+from tools import utils
+
+
+class MongoDBConnection:
+    """MongoDB连接管理（单例模式）"""
+    _instance = None
+    _client: Optional[AsyncIOMotorClient] = None
+    _db: Optional[AsyncIOMotorDatabase] = None
+    _lock = asyncio.Lock()
+
+    def __new__(cls):
+        if cls._instance is None:
+            cls._instance = super(MongoDBConnection, cls).__new__(cls)
+        return cls._instance
+
+    async def get_client(self) -> AsyncIOMotorClient:
+        """获取客户端"""
+        if self._client is None:
+            async with self._lock:
+                if self._client is None:
+                    await self._connect()
+        return self._client
+
+    async def get_db(self) -> AsyncIOMotorDatabase:
+        """获取数据库"""
+        if self._db is None:
+            async with self._lock:
+                if self._db is None:
+                    await self._connect()
+        return self._db
+
+    async def _connect(self):
+        """建立连接"""
+        try:
+            mongo_config = db_config.mongodb_config
+            host = mongo_config["host"]
+            port = mongo_config["port"]
+            user = mongo_config["user"]
+            password = mongo_config["password"]
+            db_name = mongo_config["db_name"]
+
+            # 构建连接URL（有认证/无认证）
+            if user and password:
+                connection_url = f"mongodb://{user}:{password}@{host}:{port}/"
+            else:
+                connection_url = f"mongodb://{host}:{port}/"
+
+            self._client = AsyncIOMotorClient(connection_url, serverSelectionTimeoutMS=5000)
+            await self._client.server_info()  # 测试连接
+            self._db = self._client[db_name]
+            utils.logger.info(f"[MongoDBConnection] Connected to {host}:{port}/{db_name}")
+        except Exception as e:
+            utils.logger.error(f"[MongoDBConnection] Connection failed: {e}")
+            raise
+
+    async def close(self):
+        """关闭连接"""
+        if self._client is not None:
+            self._client.close()
+            self._client = None
+            self._db = None
+            utils.logger.info("[MongoDBConnection] Connection closed")
+
+
+class MongoDBStoreBase:
+    """MongoDB存储基类：提供通用的CRUD操作"""
+
+    def __init__(self, collection_prefix: str):
+        """初始化存储基类
+        Args:
+            collection_prefix: 平台前缀（xhs/douyin/bilibili等）
+        """
+        self.collection_prefix = collection_prefix
+        self._connection = MongoDBConnection()
+
+    async def get_collection(self, collection_suffix: str) -> AsyncIOMotorCollection:
+        """获取集合：{prefix}_{suffix}"""
+        db = await self._connection.get_db()
+        collection_name = f"{self.collection_prefix}_{collection_suffix}"
+        return db[collection_name]
+
+    async def save_or_update(self, collection_suffix: str, query: Dict, data: Dict) -> bool:
+        """保存或更新数据（upsert）"""
+        try:
+            collection = await self.get_collection(collection_suffix)
+            await collection.update_one(query, {"$set": data}, upsert=True)
+            return True
+        except Exception as e:
+            utils.logger.error(f"[MongoDBStoreBase] Save failed ({self.collection_prefix}_{collection_suffix}): {e}")
+            return False
+
+    async def find_one(self, collection_suffix: str, query: Dict) -> Optional[Dict]:
+        """查询单条数据"""
+        try:
+            collection = await self.get_collection(collection_suffix)
+            return await collection.find_one(query)
+        except Exception as e:
+            utils.logger.error(f"[MongoDBStoreBase] Find one failed ({self.collection_prefix}_{collection_suffix}): {e}")
+            return None
+
+    async def find_many(self, collection_suffix: str, query: Dict, limit: int = 0) -> List[Dict]:
+        """查询多条数据（limit=0表示不限制）"""
+        try:
+            collection = await self.get_collection(collection_suffix)
+            cursor = collection.find(query)
+            if limit > 0:
+                cursor = cursor.limit(limit)
+            return await cursor.to_list(length=None)
+        except Exception as e:
+            utils.logger.error(f"[MongoDBStoreBase] Find many failed ({self.collection_prefix}_{collection_suffix}): {e}")
+            return []
+
+    async def create_index(self, collection_suffix: str, keys: List[tuple], unique: bool = False):
+        """创建索引：keys=[("field", 1)]"""
+        try:
+            collection = await self.get_collection(collection_suffix)
+            await collection.create_index(keys, unique=unique)
+            utils.logger.info(f"[MongoDBStoreBase] Index created on {self.collection_prefix}_{collection_suffix}")
+        except Exception as e:
+            utils.logger.error(f"[MongoDBStoreBase] Create index failed: {e}")
+
+