Alexa Sample Code

Here's the sample code we'll be using to start our project. It's written in Python 3.6 and based off of the blueprint found in Alexa.

"""
This sample demonstrates a simple skill built with the Amazon Alexa Skills Kit.
The Intent Schema, Custom Slots, and Sample Utterances for this skill, as well
as testing instructions are located at http://amzn.to/1LzFrj6
"""

import urllib.request

POKEDEX_LOC = 'https://s3.amazonaws.com/alexa-skills-pokemon-workshop/pokemonList'
POKEMON_SLOT_NAME = 'PokedexNumber'

# --------------- 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
    }


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

def get_welcome_response():
    """
    If we wanted to initialize the session to have some attributes we could
    add those here
    """
    session_attributes = {}
    card_title = "Welcome"
    speech_output = "Welcome to the Echomon skill. "
    # If the user either does not reply to the welcome message or says something
    # that is not understood, they will be prompted again with this text.

    #TODO: Give a welcome response.
    reprompt_text = "Please try asking for a pokemon's name by, "
    return build_response(session_attributes, build_speechlet_response(
        card_title, speech_output, reprompt_text, should_end_session))

def get_fallback_response():
    card_title = "Sorry"
    speech_output = "I haven't heard of that Pokemon before. Try again."
    return build_response({}, build_speechlet_response)

def handle_session_end_request():
    card_title = "Session Ended"
    speech_output = "Thank you for trying the Pokemon Info skill. " \
                    "Have a nice day! "
    # Setting this to true ends the session and exits the skill.
    should_end_session = True
    return build_response({}, build_speechlet_response(
        card_title, speech_output, None, should_end_session))

def get_pokemon_name(intent, session):
    session_attributes = {}

    reprompt_text = None

    #TODO: Get the pokemon's name

    return build_response(session_attributes, build_speechlet_response(
        intent['name'], speech_output, reprompt_text, should_end_session))



# --------------- Events ------------------


def on_launch(launch_request, session):
    """
    Called when the user launches the skill without specifying what they
    want
    """
    print("on_launch requestId=" + launch_request['requestId'] +
          ", sessionId=" + session['sessionId'])
    # Dispatch to your skill's launch
    return get_welcome_response()


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']

    # TODO: Dispatch to your skill's intent handlers
    if intent_name == "":
        return get_pokemon_name(intent, session)
    elif intent_name == "AMAZON.FallbackIntent":
        return get_fallback_response()
    elif intent_name == "AMAZON.HelpIntent":
        return get_welcome_response()
    elif intent_name == "AMAZON.CancelIntent" or intent_name == "AMAZON.StopIntent":
        return handle_session_end_request()
    else:
        raise ValueError("Invalid intent")


# --------------- Main handler ------------------

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.
    """
    # if (event['session']['application']['applicationId'] !=
    #         "amzn1.echo-sdk-ams.app.[unique-value-here]"):
    #     raise ValueError("Invalid Application ID")

    if event['request']['type'] == "LaunchRequest":
        return on_launch(event['request'], event['session'])
    elif event['request']['type'] == "IntentRequest":
        return on_intent(event['request'], event['session'])


# --------------- Read Pokemon Data ----------------------

POKEMON_DICT = {}
POKEMON_PARSED = False

def parse_pokemon():
    """
    Parse pokemon information from the S3 store
    """
    with urllib.request.urlopen(POKEDEX_LOC) as pokedex:
        for pokemon in pokedex.readlines():
            index, name = pokemon.decode('utf-8')[:-1].split(',')
            POKEMON_DICT[index] = name

    POKEMON_PARSED = True

def get_pokemon(index):
    """
    Given a pokemon index, return the pokemon name.
    """
    if not POKEMON_PARSED:
        parse_pokemon()

    return POKEMON_DICT[str(index)]

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