Voice - Send a TTS message and collect digits

from base64 import b64encode

import requests

customer_id = 'Your Customer ID goes here.'
api_key = 'Your API key goes here.'

destination_number = 'The complete phone number you want to call, including country code, with no special characters or spaces.'
caller_id_number = 'The phone number you purchased from Telesign goes here.'
external_id = 'An external ID you generated for this transaction.' # Optional parameter

url = "https://rest-ww.telesign.com/v2/voice"

payload = {
  "method": "dial",
  "params": {
    "to": destination_number,
    "caller_id_number": caller_id_number,
    "external_id": external_id
  }
}


headers = {
  'Accept': "application/json",
  'Content-Type': "application/json",
  'Authorization': "Basic {}".format(b64encode(customer_id + ":" + api_key).decode('utf-8'))
}

response = requests.request("POST", url, data=json.dumps(payload), headers=headers)

print(response.text)

{
  "method": "speak",
  "params": {
    "tts": {
      "message": "<speak>Press <prosody volume='loud'>1</prosody> for your account balance. Press <prosody volume='loud'>2</prosody> to speak with a customer service representative.</speak>",
      "language": "en-US",
      "type": "ssml"
    },
    "collect_digits": {
      "max": 1,
      "timeout": 10000,
      "inter_digit_timeout": 3000,
      "terminators": "*"
    }
  }
}

from json import dumps, loads

from bottle import route, run, request, post

# This is an example response to a dial_completed event that will play a message and collect digits during play.
# {
#     "method": "speak",
#     "params": {
#     "tts": {
#				"message": "Press 1 for your account balance. Press 2 to speak with a customer service 
# representative",
#				"language": "en-US"
# }, 
#    "collect_digits": {
#    		"max": 1,,
#    		"timeout": 10000,
#    		"inter_digit_timeout": 3000,
#				"terminators": "*"
#   }
#  }
# }

class Response:

    def __init__(self, method, params=None):
        if params is None:
            params = {}

        self.json_rpc = "2.0"
        self.method = method
        self.params = params

    def to_json(self):
        return dumps(self.__dict__)

@post('/')
def telesign_event():
    # Throughout a call session Telesign will notify you of all events.
    # Each event requires you to send us an appropriate action defined in our documentation.
    # This endpoint needs to match the URL stored in our system to properly communicate.
    #
    # In this example, the server will respond to the dial_completed event.

    # First extract the event from the JSON body in the request.
    event = request.json.get('event')

    if event == 'dial_completed':
        # Check for an 'answered' status. For 'answered' fill out your parameters:
        message = "Press 1 for your account balance. Press 2 to speak with a customer service representative."
        language = "en-US" 
        max = 1
        timeout = 10000 # How long to wait for the first digit before ending collection. 
        inter_digit_timeout = 3000 # How long to wait for the next digit before ending collection, after at least one digit has been entered. 
        terminators = "*" # The characters to use as terminators for end user entry of digits.

        # Generate the command in the JSON format used by TeleSign.
        return Response(method='speak',
          params={
            'tts': { 'message': message, 'language': language },
            'collect_digits': { 'max': max, 'timeout': timeout, 'inter_digit_timeout': inter_digit_timeout, 'terminators': terminators }
          }
       	).to_json()
    else:

        return Response(method='hangup').to_json()

run(host='localhost', port=8080, debug=True)