feat: Slack bot (#469)

Co-authored-by: Taranjeet Singh <reachtotj@gmail.com>

examples/slack_bot/.gitignore

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-__pycache__
-db
-database
-pyenv
-venv
-.env
-trash_files/

examples/slack_bot/README.md

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-# Slack Bot
-
-This is a replit template to create your own Slack bot using the embedchain package. To know more about the bot and how to use it, go [here](https://docs.embedchain.ai/examples/slack_bot).

examples/slack_bot/requirements.txt

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-flask==2.3.2
-slackeventsapi==3.0.1
-slacksdk==3.21.3
-python-dotenv==1.0.0
-embedchain

examples/slack_bot/slack_bot.py

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-import os
-
-from dotenv import load_dotenv
-from flask import Flask
-from slack_sdk import WebClient
-from slackeventsapi import SlackEventAdapter
-
-from embedchain import App
-
-load_dotenv()
-app = Flask(__name__)
-
-slack_signing_secret = os.environ.get("SLACK_SIGNING_SECRET")
-slack_events_adapter = SlackEventAdapter(slack_signing_secret, "/chat", app)
-
-slack_bot_token = os.environ.get("SLACK_BOT_TOKEN")
-client = WebClient(token=slack_bot_token)
-
-chat_bot = App()
-recent_message = {"ts": 0, "channel": ""}
-
-
-@slack_events_adapter.on("message")
-def handle_message(event_data):
-    message = event_data["event"]
-    if "text" in message and message.get("subtype") != "bot_message":
-        text = message["text"]
-        if float(message.get("ts")) > float(recent_message["ts"]):
-            recent_message["ts"] = message["ts"]
-            recent_message["channel"] = message["channel"]
-            if text.startswith("query"):
-                _, question = text.split(" ", 1)
-                try:
-                    response = chat_bot.chat(question)
-                    send_slack_message(message["channel"], response)
-                    print("Query answered successfully!")
-                except Exception as e:
-                    send_slack_message(message["channel"], "An error occurred. Please try again!")
-                    print("Error occurred during 'query' command:", e)
-            elif text.startswith("add"):
-                _, data_type, url_or_text = text.split(" ", 2)
-                if url_or_text.startswith("<") and url_or_text.endswith(">"):
-                    url_or_text = url_or_text[1:-1]
-                try:
-                    chat_bot.add(data_type, url_or_text)
-                    send_slack_message(message["channel"], f"Added {data_type} : {url_or_text}")
-                except Exception as e:
-                    send_slack_message(message["channel"], f"Failed to add {data_type} : {url_or_text}")
-                    print("Error occurred during 'add' command:", e)
-
-
-def send_slack_message(channel, message):
-    response = client.chat_postMessage(channel=channel, text=message)
-    return response
-
-
-if __name__ == "__main__":
-    app.run(host="0.0.0.0", port=5000, debug=False)

examples/slack_bot/variables.env

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-SLACK_SIGNING_SECRET=""
-SLACK_BOT_TOKEN=""
-OPENAI_API_KEY=""