AWS Lambda code for Alexa skill handler for WS2811 control via Octoblu

lambda.py

from __future__ import print_function
import urllib
import urllib2

octoblu_trigger = "https://triggers.octoblu.com/v2/flows/3791898c-6234-4c57-a860-92a8e6c616fc/triggers/6b5c0082-37ab-459b-9912-8228ccb43a15"

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

def build_speechlet_response(output):
    return {
        'outputSpeech': {
            'type': 'PlainText',
            'text': output
        }
    }


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





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

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']
    
    mode = None
    color = None
    text = None

    session_attributes = {}
    speech_output = None

    # Dispatch to your skill's intent handlers
    if intent_name == "ModeIntent":
        if ('mode' in intent['slots']) and ('value' in intent['slots']['mode']):
            mode = intent['slots']['mode']['value']
    elif intent_name == "ColorIntent":
        if ('color' in intent['slots']) and ('value' in intent['slots']['color']):
            color = intent['slots']['color']['value']
            mode = "solid"
    elif intent_name == "TextIntent":
        if ('text' in intent['slots']) and ('value' in intent['slots']['text']):
            text = intent['slots']['text']['value']
            mode = "dotmatrix"
    elif intent_name == "AskOctobluIntent":
        mode = "octoblu"
    elif intent_name == "SorryIntent":
        speech_output = "I'm sorry James, I can't do that"
    else:
        raise ValueError("Invalid intent")

    obmsg = {"debug":intent}
    if mode:
        obmsg["mode"] = mode
    if color:
        obmsg["color"] = color
    if text:
        obmsg["text"] = text
    url = octoblu_trigger
    data = urllib.urlencode(obmsg)
    req = urllib2.Request(url, data)
    response = urllib2.urlopen(req)
    the_page = response.read()
    
    if not speech_output:
        speech_output = "OK"
    return build_response(session_attributes, build_speechlet_response(speech_output))


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


# --------------- 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.ask.skill.fb304a19-98ab-4a2b-9cc5-7608e933cf1c"):
        raise ValueError("Invalid Application ID")

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