jarvis-handler.py

"""
This code sample is a part of a simple demo to show beginners how to create a skill (app) for the Amazon Echo using AWS Lambda and the Alexa Skills Kit.

"""

from __future__ import print_function

def lambda_handler(event, context):
    """ Route the incoming request based on type (LaunchRequest, IntentRequest,
    etc.) The JSON body of the request is provided in the event parameter.
    """
    print("event.session.application.applicationId=" +
          event['session']['application']['applicationId'])

    """
    Uncomment this if statement and populate with your skill's application ID to
    prevent someone else from configuring a skill that sends requests to this
    function.
    """
    #This event fill come when alexa connected to lambda.
    if event['session']['new']:
        on_session_started({'requestId': event['request']['requestId']},
                           event['session'])
    """
        This function will be called when you launch your skill.
        So if you want to customize the welcome message go to get_welcome_response function 
        change this line -->  speech_output = "Welcom to the Jarvis."
        just edit the string whatever message you want.
    """
    if event['request']['type'] == "LaunchRequest":
        return on_launch(event['request'], event['session'])
    if event['request']['type'] == "IntentRequest":
        return on_intent(event['request'], event['session'])


def on_session_started(session_started_request, session):
    """ Called when the session starts """

    print("on_session_started requestId=" + session_started_request['requestId']
          + ", sessionId=" + session['sessionId'])


def on_launch(launch_request, session):
    """ Called when the user launches the skill without specifying what they
    want
    """

    # Dispatch to your skill's launch
    return get_welcome_response()

"""
    Whenver you ask something to alexa this fucnction will be called
"""
def on_intent(intent_request, session):
    """ Called when the user specifies an intent for this skill """

    print("on_intent requestId=" + intent_request['requestId'] +
          ", sessionId=" + session['sessionId'])

    intent = intent_request['intent']
    intent_name = intent_request['intent']['name']

    # Dispatch to your skill's intent handlers
    """
        put you condition here to respond to your intent
    """
    if intent_name == "iron_man_intro":  # change intent name here whatever your intent name is. You can if elif ladder for multiple intents
        return handle_iron_man_intro_request() #Either create your new function or just go to this function and edit the speech_output value
    else:
        raise ValueError("Invalid intent")


def on_session_ended(session_ended_request, session):
    """ Called when the user ends the session.

    Is not called when the skill returns should_end_session=true
    """
    print("on_session_ended requestId=" + session_ended_request['requestId'] +
          ", sessionId=" + session['sessionId'])
    # add cleanup logic here

# --------------- Functions that control the skill's behavior ------------------


def handle_iron_man_intro_request():

    session_attributes = {}
    card_title = "Welcome"
    speech_output = "Iron Man is a fictional superhero appearing in American comic books published by Marvel Comics."
    reprompt_text = speech_output
    should_end_session = False
    return build_response(session_attributes, build_speechlet_response(
        card_title, speech_output, reprompt_text, should_end_session))

        
def get_welcome_response():

    session_attributes = {}
    card_title = "Welcome"
    speech_output = "Welcom to the Jarvis." #Change here for your custom welcome message
    # If the user either does not reply to the welcome message or says something
    # that is not understood, they will be prompted again with the same text.
    reprompt_text = speech_output
    should_end_session = False
    return build_response(session_attributes, build_speechlet_response(
        card_title, speech_output, reprompt_text, should_end_session))


# --------------- Helpers that build all of the responses ----------------------


def build_speechlet_response(title, output, reprompt_text, should_end_session):
    return {
        'outputSpeech': {
            'type': 'PlainText',
            'text': output
        },
        'card': {
            'type': 'Simple',
            'title': 'SessionSpeechlet - ' + title,
            'content': 'SessionSpeechlet - ' + output
        },
        'reprompt': {
            'outputSpeech': {
                'type': 'PlainText',
                'text': reprompt_text
            }
        },
        'shouldEndSession': should_end_session
    }


def build_response(session_attributes, speechlet_response):
    return {
        'version': '1.0',
        'sessionAttributes': session_attributes,
        'response': speechlet_response
    }