add: WhatsApp, Slack and Telegram bots (#438)

examples/whatsapp_bot/.gitignore

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+__pycache__
+db
+database
+pyenv
+venv
+.env
+trash_files/
+.ideas.md

examples/whatsapp_bot/README.md

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

examples/whatsapp_bot/requirements.txt

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+Flask==2.3.2
+twilio==8.5.0
+embedchain

examples/whatsapp_bot/variables.env

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+OPENAI_API_KEY=""

examples/whatsapp_bot/whatsapp_bot.py

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+from flask import Flask, request
+from twilio.twiml.messaging_response import MessagingResponse
+
+from embedchain import App
+
+app = Flask(__name__)
+chat_bot = App()
+
+
+@app.route("/chat", methods=["POST"])
+def chat():
+    incoming_message = request.values.get("Body", "").lower()
+    response = handle_message(incoming_message)
+    twilio_response = MessagingResponse()
+    twilio_response.message(response)
+    return str(twilio_response)
+
+
+def handle_message(message):
+    if message.startswith("add "):
+        response = add_sources(message)
+    else:
+        response = query(message)
+    return response
+
+
+def add_sources(message):
+    message_parts = message.split(" ", 2)
+    if len(message_parts) == 3:
+        data_type = message_parts[1]
+        url_or_text = message_parts[2]
+        try:
+            chat_bot.add(data_type, url_or_text)
+            response = f"Added {data_type}: {url_or_text}"
+        except Exception as e:
+            response = f"Failed to add {data_type}: {url_or_text}.\nError: {str(e)}"
+    else:
+        response = "Invalid 'add' command format.\nUse: add <data_type> <url_or_text>"
+    return response
+
+
+def query(message):
+    try:
+        response = chat_bot.chat(message)
+    except Exception:
+        response = "An error occurred. Please try again!"
+    return response
+
+
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=5000, debug=False)