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August 28, 2020 10:00
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Lambda function for the Amazon Alexa Tutorial
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""" | |
This is a Python template for Alexa to get you building skills (conversations) quickly. | |
""" | |
from __future__ import print_function | |
from iota import Iota | |
api = Iota('https://nodes.devnet.iota.org:443') | |
# --------------- 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_balance(address): | |
gb_result = api.get_balances([address]) | |
balance = gb_result['balances'] | |
return (balance[0]) | |
def get_personal_balance(): | |
""" An example of a custom intent. Same structure as welcome message, just make sure to add this intent | |
in your alexa skill in order for it to work. | |
""" | |
# Insert your personal IOTA address here | |
address = "XUGOERAHKXQCVPPVVIPIJGLUTLTKFHYGMBBLOXJFYGSARLOTYFFSDZNYCOBOCNPGRMJWZCQBNOROUCE9G" | |
balance = get_balance(address) | |
session_attributes = {} | |
card_title = "Pesonal Balance" | |
speech_output = "Your personal balance is " + str(balance) + " iota" | |
reprompt_text = "You never responded to the first test message. Sending another one." | |
should_end_session = False | |
return build_response(session_attributes, build_speechlet_response( | |
card_title, speech_output, reprompt_text, should_end_session)) | |
def get_hotel_balance(): | |
""" An example of a custom intent. Same structure as welcome message, just make sure to add this intent | |
in your alexa skill in order for it to work. | |
""" | |
# Insert the Hotel IOTA address here... | |
address = 'YOURADDRESSFROMTHEPREVIOUSTUTORIAL' | |
balance = get_balance(address) | |
session_attributes = {} | |
card_title = "Hotel Balance" | |
speech_output = "Your hotel balance is " + str(balance) + " iota" | |
reprompt_text = "You never responded to the first test message. Sending another one." | |
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(): | |
""" 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 iota balance application, what can i do for you?" | |
# 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 = "I don't know if you heard me, welcome to the iota balance application!" | |
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 using the iota balance application. " \ | |
"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)) | |
# --------------- Events ------------------ | |
def on_session_started(session_started_request, session): | |
""" Called when the session starts. | |
One possible use of this function is to initialize specific | |
variables from a previous state stored in an external database | |
""" | |
# Add additional code here as needed | |
pass | |
def on_launch(launch_request, session): | |
""" Called when the user launches the skill without specifying what they | |
want | |
""" | |
# Dispatch to your skill's launch message | |
return get_welcome_response() | |
def on_intent(intent_request, session): | |
""" Called when the user specifies an intent for this skill """ | |
intent = intent_request['intent'] | |
intent_name = intent_request['intent']['name'] | |
# Dispatch to your skill's intent handlers | |
if intent_name == "PersonalBalance": | |
return get_personal_balance() | |
elif intent_name == "HotelBalance": | |
return get_hotel_balance() | |
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") | |
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("Incoming request...") | |
""" | |
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']) |
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