feat: add summary and search commands (#54)

* feat: add summary and search commands

Signed-off-by: Frost Ming <me@frostming.com>

* fix formats

Signed-off-by: Frost Ming <me@frostming.com>

* fix: clean up

Signed-off-by: Frost Ming <me@frostming.com>

handlers/summary/__main__.py

@@ -0,0 +1,49 @@
+from __future__ import annotations
+
+import asyncio
+import os
+import sys
+
+from .messages import ChatMessage, MessageStore
+
+
+async def fetch_messages(chat_id: int) -> None:
+    from telethon import TelegramClient
+    from telethon.tl.types import Message
+
+    store = MessageStore("data/messages.db")
+
+    api_id = int(os.getenv("TELEGRAM_API_ID"))
+    api_hash = os.getenv("TELEGRAM_API_HASH")
+    async with TelegramClient("test", api_id, api_hash) as client:
+        assert isinstance(client, TelegramClient)
+        with store.connect() as conn:
+            async for message in client.iter_messages(chat_id, reverse=True):
+                if not isinstance(message, Message) or not message.message:
+                    continue
+                if not message.from_id:
+                    continue
+                print(message.pretty_format(message))
+                user = await client.get_entity(message.from_id)
+                fullname = user.first_name
+                if user.last_name:
+                    fullname += f" {user.last_name}"
+                store.add_message(
+                    ChatMessage(
+                        chat_id=chat_id,
+                        message_id=message.id,
+                        content=message.message,
+                        user_id=message.from_id.user_id,
+                        user_name=fullname,
+                        timestamp=message.date,
+                    ),
+                    conn=conn,
+                )
+
+
+if __name__ == "__main__":
+    if len(sys.argv) != 2:
+        print("Usage: python -m handlers.summary <chat_id>")
+        sys.exit(1)
+    chat_id = int(sys.argv[1])
+    asyncio.run(fetch_messages(chat_id))  # 替换为实际的群组ID