feat:初版

database/keyvalDB.py

@@ -0,0 +1,54 @@
+"""
+KeyvalDB - 键值数据库（简化版，仅使用 aiosqlite）
+"""
+
+import aiosqlite
+from loguru import logger
+from utils.singleton import Singleton
+
+
+class KeyvalDB(metaclass=Singleton):
+    """键值存储数据库"""
+
+    def __init__(self):
+        self.db_path = "database/keyval.db"
+        self.conn = None
+
+    async def initialize(self):
+        """初始化数据库"""
+        self.conn = await aiosqlite.connect(self.db_path)
+        await self.conn.execute("""
+            CREATE TABLE IF NOT EXISTS keyval (
+                key TEXT PRIMARY KEY,
+                value TEXT
+            )
+        """)
+        await self.conn.commit()
+        logger.debug("KeyvalDB 初始化完成")
+
+    async def set(self, key: str, value: str):
+        """设置键值"""
+        await self.conn.execute(
+            "INSERT OR REPLACE INTO keyval (key, value) VALUES (?, ?)",
+            (key, value)
+        )
+        await self.conn.commit()
+
+    async def get(self, key: str):
+        """获取值"""
+        cursor = await self.conn.execute(
+            "SELECT value FROM keyval WHERE key = ?",
+            (key,)
+        )
+        row = await cursor.fetchone()
+        return row[0] if row else None
+
+    async def delete(self, key: str):
+        """删除键"""
+        await self.conn.execute("DELETE FROM keyval WHERE key = ?", (key,))
+        await self.conn.commit()
+
+    async def close(self):
+        """关闭连接"""
+        if self.conn:
+            await self.conn.close()