feat: linbot

restruct the project

app/Line/Router.py

@@ -0,0 +1,59 @@
+from fastapi import APIRouter, Request, HTTPException
+from linebot.v3 import WebhookHandler
+from linebot.v3.messaging import (
+    Configuration,
+    ApiClient,
+    MessagingApi,
+    ReplyMessageRequest,
+    TextMessage,
+)
+from linebot.v3.webhooks import MessageEvent, TextMessageContent, FollowEvent
+from linebot.v3.exceptions import InvalidSignatureError
+from app.config import LINE_CHANNEL_ACCESS_TOKEN, LINE_CHANNEL_SECRET
+from app.line.handlers import handle_text, handle_captcha
+
+router = APIRouter()
+configuration = Configuration(access_token=LINE_CHANNEL_ACCESS_TOKEN)
+handler = WebhookHandler(LINE_CHANNEL_SECRET)
+
+
+@router.post("/webhook")
+async def webhook(request: Request):
+    signature = request.headers.get("X-Line-Signature", "")
+    body = await request.body()
+    try:
+        handler.handle(body.decode(), signature)
+    except InvalidSignatureError:
+        raise HTTPException(status_code=400, detail="Invalid signature")
+    return "OK"
+
+
+def _reply(reply_token: str, text: str):
+    with ApiClient(configuration) as api_client:
+        MessagingApi(api_client).reply_message(
+            ReplyMessageRequest(
+                reply_token=reply_token,
+                messages=[TextMessage(text=text)]
+            )
+        )
+
+
+@handler.add(MessageEvent, message=TextMessageContent)
+def on_message(event):
+    line_user_id = event.source.user_id
+    msg = event.message.text.strip()
+
+    if handle_captcha(msg):
+        _reply(event.reply_token, "✅ 驗證碼已送出！")
+    else:
+        _reply(event.reply_token, handle_text(line_user_id, msg))
+
+
+@handler.add(FollowEvent)
+def on_follow(event):
+    _reply(event.reply_token, (
+        "👋 歡迎使用 Myfinance 記帳 Bot！\n\n"
+        "📝 點下方「記帳」開始記帳\n"
+        "📊 點「查今天」或「查本月」查詢\n\n"
+        "開始記帳吧！💪"
+    ))