post.py

# if the request was not get, it must be POST and we can just proceed with sending a message back to user
    else:
        # get whatever message a user sent the bot
        output = request.get_json()
        for event in output['entry']:
            messaging = event['messaging']
            for message in messaging:
                if message.get('message'):
                    # Facebook Messenger ID for user so we know where to send response back to
                    recipient_id = message['sender']['id']
                    if message['message'].get('text'):
                        # NLP detection
                        if message['message'].get('nlp'):
                            try:
                                # detected English
                                if 'en' in message['message']['nlp']['detected_locales'][0]['locale']:
                                    # greeting detected
                                    if message['message']['nlp']['entities'].get('greetings') and \
                                            message['message']['nlp']['entities']['greetings'][0]['confidence'] >= 0.9:
                                        response = "Hello! Nice to meet you!"
                                        bot.send_text_message(recipient_id, response)
                                        continue
                                    # bye detected
                                    elif message['message']['nlp']['entities'].get('bye') and \
                                            message['message']['nlp']['entities']['bye'][0]['confidence'] >= 0.9:
                                        response = "See you next time!"
                                        bot.send_text_message(recipient_id, response)
                                        continue
                                    # thank detected
                                    elif message['message']['nlp']['entities'].get('thanks') and \
                                            message['message']['nlp']['entities']['thanks'][0]['confidence'] >= 0.9:
                                        response = "You are welcome!"
                                        bot.send_text_message(recipient_id, response)
                                        continue
                                # detected Spanish
                                elif 'es' in message['message']['nlp']['detected_locales'][0]['locale']:
                                    # greeting detected
                                    if message['message']['nlp']['entities'].get('greetings') and \
                                            message['message']['nlp']['entities']['greetings'][0]['confidence'] >= 0.6:
                                        response = "¡Mucho gusto! ¿Cómo estás?"
                                        bot.send_text_message(recipient_id, response)
                                        continue
                                    elif message['message']['nlp']['entities'].get('bye') and \
                                            message['message']['nlp']['entities']['bye'][0]['confidence'] >= 0.6:
                                        response = "¡Adíos!"
                                        bot.send_text_message(recipient_id, response)
                                        continue
                                    elif message['message']['nlp']['entities'].get('thanks') and \
                                            message['message']['nlp']['entities']['thanks'][0]['confidence'] >= 0.6:
                                        response = "¡De nada!"
                                        bot.send_text_message(recipient_id, response)
                                        continue
                            except KeyError:
                                print('NLP is not deployed.')