Add notification sender and update item routes

pkg/sender/server_chan.py

@@ -0,0 +1,42 @@
+from typing import Literal
+from loguru import logger
+from model import Setting
+from sqlmodel.ext.asyncio.session import AsyncSession
+from pkg.utils import raise_internal_error, raise_service_unavailable
+import aiohttp
+
+class ServerChatBot:
+    async def get_url(session: AsyncSession):
+        server_chan_key = await Setting.get(session, Setting.name == "server_chan_key")
+    
+        if not server_chan_key.value:
+            raise_internal_error("Server酱未配置，请联系管理员")
+        
+        url = f"https://sctapi.ftqq.com/{server_chan_key.value}.send"
+        return url
+    
+    async def send_text(
+        session: AsyncSession,
+        title: str, 
+        description: str, 
+    ) -> None:
+        """发送的 Markdown 消息。
+
+        Args:
+            session (AsyncSession): 数据库会话
+            title (str): 需要发送的标题
+            description (str): 需要发送的文本消息
+        """
+        async with aiohttp.ClientSession() as http_session:
+            async with http_session.post(
+                url=await ServerChatBot.get_url(session),
+                data={
+                    "title": title,
+                    "desp": description
+                }
+            ) as response:
+                if response.status != 200:
+                    logger.error(f"Failed to send to Server Chan: {response.status}")
+                    raise_internal_error("Server酱服务不可用，请稍后再试")
+                else:
+                   logger.info("Server Chan message sent successfully")