lambda_function.py

"""
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

For additional samples, visit the Alexa Skills Kit Getting Started guide at
http://amzn.to/1LGWsLG
"""
from __future__ import print_function
from urllib2 import urlopen
from urllib import urlencode
import json
import re
import random

# --------------- 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 Alexa Skills Kit sample. " \
                    "Please tell me your favorite color by saying, " \
                    "my favorite color is red"
    # 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.
    reprompt_text = "Please tell me your favorite color by saying, " \
                    "my favorite color is red."
    should_end_session = False
    return build_response(session_attributes, build_speechlet_response(
        card_title, speech_output, reprompt_text, should_end_session))


def handle_session_end_request():
    card_title = "Session Ended"
    speech_output = "Thank you for trying the Alexa Skills Kit sample. " \
                    "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 set_color_in_session(intent, session):
    """ Sets the color in the session and prepares the speech to reply to the
    user.
    """

    card_title = intent['name']
    session_attributes = {}
    should_end_session = False

    if 'Color' in intent['slots']:
        favorite_color = intent['slots']['Color']['value']
        session_attributes = create_favorite_color_attributes(favorite_color)
        speech_output = "I now know your favorite color is " + \
                        favorite_color + \
                        ". You can ask me your favorite color by saying, " \
                        "what's my favorite color?"
        reprompt_text = "You can ask me your favorite color by saying, " \
                        "what's my favorite color?"
    else:
        speech_output = "I'm not sure what your favorite color is. " \
                        "Please try again."
        reprompt_text = "I'm not sure what your favorite color is. " \
                        "You can tell me your favorite color by saying, " \
                        "my favorite color is red."
    return build_response(session_attributes, build_speechlet_response(
        card_title, speech_output, reprompt_text, should_end_session))


def get_color_from_session(intent, session):
    session_attributes = {}
    reprompt_text = None

    if session.get('attributes', {}) and "favoriteColor" in session.get('attributes', {}):
        favorite_color = session['attributes']['favoriteColor']
        speech_output = "Your favorite color is " + favorite_color + \
                        ". Goodbye."
        should_end_session = True
    else:
        speech_output = "I'm not sure what your favorite color is. " \
                        "You can say, my favorite color is red."
        should_end_session = False

    # Setting reprompt_text to None signifies that we do not want to reprompt
    # the user. If the user does not respond or says something that is not
    # understood, the session will end.
    return build_response(session_attributes, build_speechlet_response(
        intent['name'], speech_output, reprompt_text, should_end_session))

def get_allergies(intent,session):
    session_attributes = {}
    reprompt_text = None
    
    speech_output = "Nuts"
    #speech_output = requests.get('https://www.google.com').text
    should_end_session = False
    
    return build_response(session_attributes, build_speechlet_response(
        intent['name'], speech_output, reprompt_text, should_end_session))

def request_server(first_name, last_name, category, meta={}):
    data = {'firstName': first_name, 'lastName': last_name, 'category': category, 'meta': meta}
    return json.loads(urlopen("http://ec2-34-242-70-107.eu-west-1.compute.amazonaws.com:3006/alexa/voice",
        data = urlencode(data)).read())
    
def name_is_here_intent(intent, session):
    session_attributes = {}
    
    try:
        session_attributes["firstName"] = intent['slots']['firstName']['value'].lower()
        session_attributes["lastName"] = intent['slots']['lastName']['value'].lower()
    except:
        speech_output = "I could not understand the full name."
        
        return build_response(session_attributes, build_speechlet_response(
            intent['name'], speech_output, reprompt_text=None, should_end_session=False))
    
    response = request_server(session_attributes["firstName"], session_attributes["lastName"], 'TEST_NAME')
    if ("error" in response):
        speech_output = str(response)
    else:
        speech_output = "Ok."
    
    return build_response(session_attributes, build_speechlet_response(
        intent['name'], speech_output, reprompt_text=None, should_end_session=False))

category_mapping = {
    'prescriptions': 'PRESCRIPTIONS',
    'prescription': 'PRESCRIPTIONS',
    'allergy': 'ALLERGIES',
    'allergies': 'ALLERGIES',
    'conditions': 'CONDITIONS',
    'condition': 'CONDITIONS',
    'medical': 'CONDITIONS',
    'past conditions': 'PAST_CONDITIONS',
    'past condition': 'PAST_CONDITIONS',
    'goals': 'GOALS',
    'goal': 'GOALS'
}
def information_intent(intent, session):
    session_attributes = session['attributes']
    try:
        firstName = session_attributes["firstName"]
        lastName = session_attributes["lastName"]
    except: 
        return build_response(session_attributes, build_speechlet_response(
            intent['name'], output = "Which patient is here?", reprompt_text=None, should_end_session=False))
    try:
        category = intent['slots']['category']['value'].strip(".")
        category = category_mapping[category.lower()]
    except:
        return build_response(session_attributes, build_speechlet_response(
            intent['name'], output = "I don't know.", reprompt_text=None, should_end_session=False))
    
    response = request_server(session_attributes["firstName"], session_attributes["lastName"], category)
    
    if "error" in response:
        return build_response(session_attributes, build_speechlet_response(
            intent['name'], output = "Something went wrong.", reprompt_text=None, should_end_session=False))
    category_output = category.lower().replace('_', ' ')
    response = [re.sub(r'\s\(.*\)', '', item).replace('<', 'smaller than').replace('>', 'larger than') for item in response]
    if len(response) == 0:
        output = 'I found no %s' % category_output
    else:
        if random.random() > 0.5:
            output = 'I found the following %s: %s' % (category_output, ', '.join(response))
        else:
            output = 'Here are the %s: %s' % (category_output, ', '.join(response))
    
    return build_response(session_attributes, build_speechlet_response(
            intent['name'], output, reprompt_text=None, should_end_session=False))

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

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):
    raise ValueError("Invalid intent")
    
    """ 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']

    # raise ValueError(intent_name)

    # Dispatch to your skill's intent handlers
    if intent_name == "NameIsHereIntent":
        return name_is_here_intent(intent,session)
    elif intent_name == "InformationIntent":
        return information_intent(intent, session)
    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: %s" % intent_name)


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.echo-sdk-ams.app.[unique-value-here]"):
    #     raise ValueError("Invalid Application ID")
    if event['session']['new']:
        on_session_started({'requestId': event['request']['requestId']},
                           event['session'])

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