How to create a facebook bot which echoes user input infinite number of times and stops only when the user types a specific command (e.g. bye)?

Question

I have created a fb bot which simply echoes the user input. I want it to echo the user inputs continuously and stop when the user types in "bye". How do I do that? Please help out. Code : ```import os import sys import json

import requests
import time
from flask import Flask, request

app = Flask(__name__)

@app.route('/', methods=['GET'])
def verify():
    if request.args.get("hub.mode") == "subscribe" and request.args.get("hub.challenge"):
        if not request.args.get("hub.verify_token") == os.environ["VERIFY_TOKEN"]:
            return "Verification token mismatch", 403
        return request.args["hub.challenge"], 200

    return "Hello world", 200


@app.route('/', methods=['POST'])
def webhook():
    data = request.get_json()
    if data["object"] == "page":
        for entry in data["entry"]:
            for messaging_event in entry["messaging"]:
                if messaging_event.get("message"):  # someone sent us a message
                    sender_id = messaging_event["sender"]["id"]        
                    recipient_id = messaging_event["recipient"]["id"]  
                    message_text = messaging_event["message"]["text"]  

                    reply = "Received : " + message_text

                    if "bye" in message_text.lower():
                        reply = "Good-bye"
                    send_message(sender_id, reply)

    return "ok", 200


def send_message(recipient_id, message_text):

    log("sending message to {recipient}: {text}".format(recipient=recipient_id, text=message_text))

    params = {
        "access_token": os.environ["PAGE_ACCESS_TOKEN"]
    }
    headers = {
        "Content-Type": "application/json"
    }
    data = json.dumps({
        "recipient": {
            "id": recipient_id
        },
        "message": {
            "text": message_text
        }
    })
    r = requests.post("https://graph.facebook.com/v2.6/me/messages", params=params, headers=headers, data=data)
    if r.status_code != 200:
        log(r.status_code)
        log(r.text)



if __name__ == '__main__':
    app.run(debug=True) ```

I have created a fb bot which simply echoes the user input. I want it to echo the user inputs continuously and stop when the user types in "bye". What I mean by this is that the user input is echoed back infinite number of times and the infinite loop breaks only when a "bye" is encountered. — Kaustabh Datta Choudhury, Nov 12 '16 at 18:06

score 0 · Answer 1 · answered Nov 12 '16 at 17:47

0

How about return without send_message(sender_id, reply) function? Like this

if "bye" in message_text.lower():
     return "bye", 200

answered Nov 12 '16 at 17:47

dohvis

164
2
7

In that case, the user cannot see the "Goodbye" message. Also, when I am making this into a infinite echo, it doesn't break the infinite loop. Breaking the infinite loop as soon as a bye is sent, is the purpose of the question. – Kaustabh Datta Choudhury Nov 12 '16 at 18:03

Bhavani Ravi · Answer 2 · 2016-11-12T18:28:43.700

0

This code is very similar to yours, except the fact that I used class based view

To break the loop add fbid of the user in a file or a DB after he/she says bye. Everytime a message is posted check fbid to see whether user had already said "bye". If yes return empty response

def post_facebook_message(fbid, recevied_message):
    """
    takes a user fb id and posts the bot message as response
    """
    post_message_url = 'https://graph.facebook.com/v2.6/me/messages?access_token='+PAGE_ACCESS_TOKEN
    response_msg = json.dumps({"recipient":{"id":fbid}, "message":{"text":recevied_message}})
    status = requests.post(post_message_url, headers={"Content-Type": "application/json"},data=response_msg)
    print status.json()

class FBBotView(generic.View):
    #this is to verify your FB account with your program
    #use ythe same verify token used while registering the bot
    @method_decorator(csrf_exempt)
    def get(self, request, *args, **kwargs):
        if self.request.GET['hub.verify_token'] == VERIFY_TOKEN:
            return HttpResponse(self.request.GET['hub.challenge'])
        else:
            return HttpResponse('Error, invalid token')
    @method_decorator(csrf_exempt)
    def dispatch(self, request, *args, **kwargs):
        return generic.View.dispatch(self, request, *args, **kwargs)

    # Post function to handle Facebook messages
    def post(self, request, *args, **kwargs):
        # Converts the text payload into a python dictionary
        incoming_message = json.loads(self.request.body.decode('utf-8'))
        # Facebook recommends going through every entry since they might send
        # multiple messages in a single call during high load
        for entry in incoming_message['entry']:
            for message in entry['messaging']:
                # Check to make sure the received call is a message call
                # This might be delivery, optin, postback for other events
                if 'message' in message:
                    if recieved_message.lower() == "bye":
                         #sends an empty response
                         message = "Good bye"

                    post_facebook_message(message['sender']['id'],message)
        #this line is important because many times FB checks validity of webhook.
        return HttpResponse()

edited Nov 12 '16 at 18:28

answered Nov 12 '16 at 17:56

Bhavani Ravi

2,130
3
18
41

In that case, the user cannot see the "Goodbye" message. Also, when I am making this into a infinite echo, it doesn't break the infinite loop. Breaking the infinite loop as soon as a bye is sent, is the purpose of the question – Kaustabh Datta Choudhury Nov 12 '16 at 18:06
@KaustabhDattaChoudhury what do you mean by breaking the loop, Do you mean the bot should not reply anything after user says Bye ?? – Bhavani Ravi Nov 12 '16 at 18:20
if that is the case add those fbid's to a DB or a file. – Bhavani Ravi Nov 12 '16 at 18:23
This is what I mean. You send. "hello" The bot keeps sending back hello. "hello" "hello" "hello" The bot stops as soon as you send a "bye" – Kaustabh Datta Choudhury Nov 12 '16 at 18:35
To break the loop add fbid of the user in a file or a DB after he/she says bye. Everytime a message is posted check fbid to see whether user had already said "bye". If yes return empty response – Bhavani Ravi Nov 12 '16 at 18:44
I don't want to stop communication after a "bye" is sent. I just want to break the infinite loop. – Kaustabh Datta Choudhury Nov 12 '16 at 18:51
So next time when the user says hi what should happen ?? – Bhavani Ravi Nov 12 '16 at 18:53
"hi" should start echoing back infinitely. – Kaustabh Datta Choudhury Nov 12 '16 at 18:57
Just a simple echo. You send something, the bot sends back the same. You send bye, the bot says Good-bye. – Kaustabh Datta Choudhury Nov 12 '16 at 19:35
And once you say 'hi' again it goes back to echoing again the way you asked – Bhavani Ravi Nov 13 '16 at 04:42

How to create a facebook bot which echoes user input infinite number of times and stops only when the user types a specific command (e.g. bye)?

2 Answers2