Slack Bot プラグインの開発

dify plugin init

settings:
  - name: bot_token
    type: secret-input
    required: true
    label:
      en_US: Bot Token
      zh_Hans: Bot Token
      pt_BR: Token do Bot
      ja_JP: Bot Token
    placeholder:
      en_US: Please input your Bot Token
      zh_Hans: 请输入你的 Bot Token
      pt_BR: Por favor, insira seu Token do Bot
      ja_JP: ボットトークンを入力してください
  - name: allow_retry
    type: boolean
    required: false
    label:
      en_US: Allow Retry
      zh_Hans: 允许重试
      pt_BR: Permitir Retentativas
      ja_JP: 再試行を許可
    default: false
  - name: app
    type: app-selector
    required: true
    label:
      en_US: App
      zh_Hans: 应用
      pt_BR: App
      ja_JP: アプリ
    placeholder:
      en_US: the app you want to use to answer Slack messages
      zh_Hans: 你想要用来回答 Slack 消息的应用
      pt_BR: o app que você deseja usar para responder mensagens do Slack
      ja_JP: あなたが Slack メッセージに回答するために使用するアプリ
endpoints:
  - endpoints/slack.yaml

  - name: app
    type: app-selector
    scope: chat

path: "/"
method: "POST"
extra:
  python:
    source: "endpoints/slack.py"

import json
import traceback
from typing import Mapping
from werkzeug import Request, Response
from dify_plugin import Endpoint
from slack_sdk import WebClient
from slack_sdk.errors import SlackApiError


class SlackEndpoint(Endpoint):
    def _invoke(self, r: Request, values: Mapping, settings: Mapping) -> Response:
        """
        Invokes the endpoint with the given request.
        """
        retry_num = r.headers.get("X-Slack-Retry-Num")
        if (not settings.get("allow_retry") and (r.headers.get("X-Slack-Retry-Reason") == "http_timeout" or ((retry_num is not None and int(retry_num) > 0)))):
            return Response(status=200, response="ok")
        data = r.get_json()

        # Handle Slack URL verification challenge
        if data.get("type") == "url_verification":
            return Response(
                response=json.dumps({"challenge": data.get("challenge")}),
                status=200,
                content_type="application/json"
            )
        
        if (data.get("type") == "event_callback"):
            event = data.get("event")
            if (event.get("type") == "app_mention"):
                message = event.get("text", "")
                if message.startswith("<@"):
                    message = message.split("> ", 1)[1] if "> " in message else message
                    channel = event.get("channel", "")
                    blocks = event.get("blocks", [])
                    blocks[0]["elements"][0]["elements"] = blocks[0].get("elements")[0].get("elements")[1:]
                    token = settings.get("bot_token")
                    client = WebClient(token=token)
                    try: 
                        response = self.session.app.chat.invoke(
                            app_id=settings["app"]["app_id"],
                            query=message,
                            inputs={},
                            response_mode="blocking",
                        )
                        try:
                            blocks[0]["elements"][0]["elements"][0]["text"] = response.get("answer")
                            result = client.chat_postMessage(
                                channel=channel,
                                text=response.get("answer"),
                                blocks=blocks
                            )
                            return Response(
                                status=200,
                                response=json.dumps(result),
                                content_type="application/json"
                            )
                        except SlackApiError as e:
                            raise e
                    except Exception as e:
                        err = traceback.format_exc()
                        return Response(
                            status=200,
                            response="Sorry, I'm having trouble processing your request. Please try again later." + str(err),
                            content_type="text/plain",
                        )
                else:
                    return Response(status=200, response="ok")
            else:
                return Response(status=200, response="ok")
        else:
            return Response(status=200, response="ok")

```

INSTALL_METHOD=remote
REMOTE_INSTALL_HOST=remote
REMOTE_INSTALL_PORT=5003
REMOTE_INSTALL_KEY=****-****-****-****-****

python -m main

# ./slack_bot を実際のプラグインプロジェクトパスに置き換えてください。
dify plugin package ./slack_bot