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lambda_function.py
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lambda_function.py
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# Copyright 2018 Conversant Design LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from ask_sdk_core.skill_builder import SkillBuilder
from ask_sdk_model.ui import SimpleCard
from ask_sdk_model.slu.entityresolution.status_code import StatusCode
from ask_sdk_core.utils import is_request_type, is_intent_name
import unlocker, json, sys, os
# Constants/format strings used as part of message responses
INVOCATION_NAME = "Channel Unlocker"
LAUNCH_WELCOME_MESSAGE = "Welcome to {}! Do you want to unlock Disney or Nick Jr?".format(INVOCATION_NAME)
CHANNEL_REPROMPT_MESSAGE = "Do you want to unlock Disney or Nick Jr?"
CHANNEL_ERROR_MESSAGE = "Please choose either Disney or Nick Jr."
CODE_MESSAGE = "Ok, what's the activation code?"
CODE_REPROMPT_MESSAGE = "What's the activation code?"
CODE_ERROR_MESSAGE = "That's an invalid code. Please try again."
GOODBYE_MESSAGE = "Goodbye!"
HELP_MESSAGE = "Choose the channel and provide the activation code."
ERROR_MESSAGE = "Sorry, I didn't understand that, what did you say?"
CARD_TITLE = INVOCATION_NAME
CARD_TITLE_DONE = GOODBYE_MESSAGE
CARD_TITLE_HELP = "Help"
SESSION_STATE_KEY = "STATE"
CHANNEL_SLOT_NAME = "Channel"
CODE_SLOT_NAMES = ["DigitOne", "DigitTwo", "DigitThree", "DigitFour", "DigitFive", "DigitSix", "DigitSeven"]
CODE_NUMBER_MAP = { "ZERO": "0", "ONE": "1", "TWO": "2", "THREE": "3", "FOUR": "4", "FIVE": "5", "SIX": "6", "SEVEN": "7", "EIGHT": "8", "NINE": "9"}
UNLOCK_SUCCESS_MESSAGE = "Done. Goodbye!"
UNLOCK_FAILURE_MESSAGE = "The channel could not be unlocked. Please try again. Goodbye!"
USERNAME = "USERNAME"
PASSWORD = "PASSWORD"
# Helper function
def launch(handler_input):
"""Start skill"""
# set empty state
handler_input.attributes_manager.session_attributes[SESSION_STATE_KEY] = {}
handler_input.response_builder.speak(LAUNCH_WELCOME_MESSAGE).ask(CHANNEL_REPROMPT_MESSAGE).set_card(SimpleCard(CARD_TITLE, CHANNEL_REPROMPT_MESSAGE)).set_should_end_session(False)
return handler_input.response_builder.response
# Request handlers, covering the following intents:
# LaunchRequest
# IntentRequest: ChannelIntent, CodeIntent, HelpIntent, StopIntent, CancelIntent, FallbackIntent
# SessionEndedRequest
sb = SkillBuilder()
@sb.request_handler(can_handle_func=is_request_type("LaunchRequest"))
def launch_request_handler(handler_input):
"""Launch Request"""
return launch(handler_input)
@sb.request_handler(can_handle_func=is_intent_name("ChannelIntent"))
def channel_intent_handler(handler_input):
"""Accept name of channel to unlock"""
channel = handler_input.request_envelope.request.intent.slots[CHANNEL_SLOT_NAME].value.lower()
if channel.startswith("nick"):
channel = "nickjr"
if channel not in unlocker.CHANNEL_SETTINGS:
# unrecognized channel, ask for channel again
handler_input.response_builder.speak(CHANNEL_ERROR_MESSAGE).ask(CHANNEL_REPROMPT_MESSAGE).set_card(SimpleCard(CARD_TITLE, CHANNEL_REPROMPT_MESSAGE)).set_should_end_session(False)
else:
# save channel in session and ask for activation code
handler_input.attributes_manager.session_attributes[SESSION_STATE_KEY] = {"channel": channel }
handler_input.response_builder.speak(CODE_MESSAGE).ask(CODE_REPROMPT_MESSAGE).set_card(SimpleCard(CARD_TITLE, CODE_REPROMPT_MESSAGE)).set_should_end_session(False)
return handler_input.response_builder.response
@sb.request_handler(can_handle_func=is_intent_name("CodeIntent"))
def code_intent_handler(handler_input):
"""Get user's activation code and use it to unlock previously provided channel to account"""
try:
state = handler_input.attributes_manager.session_attributes[SESSION_STATE_KEY]
except:
# out of session request, launch the skill
return launch(handler_input)
# channel is missing, ask for it again
if 'channel' not in state:
handler_input.response_builder.speak(CHANNEL_ERROR_MESSAGE).ask(CHANNEL_REPROMPT_MESSAGE).set_card(SimpleCard(CARD_TITLE, CHANNEL_REPROMPT_MESSAGE)).set_should_end_session(False)
return handler_input.response_builder.response
# build activation code from code intent slots
code = ''
try:
for slot in CODE_SLOT_NAMES:
code_digit_slot = handler_input.request_envelope.request.intent.slots[slot]
code_digit_resolution = code_digit_slot.resolutions.resolutions_per_authority[0]
code_digit = ''
if code_digit_resolution.status.code == StatusCode.ER_SUCCESS_MATCH:
code_digit = code_digit_resolution.values[0].value.name.upper()
if code_digit in CODE_NUMBER_MAP:
code_digit = CODE_NUMBER_MAP[code_digit]
elif len(code_digit) > 1:
code_digit = code_digit[0]
if code_digit.isupper() or code_digit.isdigit():
code += code_digit
except:
# invalid code digit or missing slot value
pass
# invalid code, ask for code again
if len(code) != 7:
handler_input.response_builder.speak(CODE_ERROR_MESSAGE).ask(CODE_REPROMPT_MESSAGE).set_card(SimpleCard(CARD_TITLE, CODE_REPROMPT_MESSAGE)).set_should_end_session(False)
return handler_input.response_builder.response
# try to unlock account now
try:
unlocker.unlock(state['channel'], code, os.environ[USERNAME], os.environ[PASSWORD])
card_message = "Channel {} was unlocked with activation code {}".format(state['channel'], code)
handler_input.response_builder.speak(UNLOCK_SUCCESS_MESSAGE).set_card(SimpleCard(CARD_TITLE_DONE, card_message)).set_should_end_session(True)
except:
card_message = "Channel {} could not be unlocked with activation code {}".format(state['channel'], code)
handler_input.response_builder.speak(UNLOCK_FAILURE_MESSAGE).set_card(SimpleCard(CARD_TITLE_DONE, card_message)).set_should_end_session(True)
return handler_input.response_builder.response
@sb.request_handler(can_handle_func=is_intent_name("AMAZON.FallbackIntent"))
def fallback_intent_handler(handler_input):
""" Fallback intent handler """
try:
_ = handler_input.attributes_manager.session_attributes[SESSION_STATE_KEY]
handler_input.response_builder.speak(ERROR_MESSAGE).ask(ERROR_MESSAGE).set_should_end_session(False)
return handler_input.response_builder.response
except:
# out of session request, launch skill
return launch(handler_input)
@sb.request_handler(can_handle_func=is_intent_name("AMAZON.HelpIntent"))
def help_intent_handler(handler_input):
""" Help intent handler """
try:
_ = handler_input.attributes_manager.session_attributes[SESSION_STATE_KEY]
handler_input.response_builder.speak(HELP_MESSAGE).set_card(SimpleCard(CARD_TITLE_HELP, HELP_MESSAGE)).set_should_end_session(False)
return handler_input.response_builder.response
except:
# out of session request, launch skill
return launch(handler_input)
@sb.request_handler(
can_handle_func=lambda input:
is_intent_name("AMAZON.CancelIntent")(input) or
is_intent_name("AMAZON.StopIntent")(input))
def cancel_and_stop_intent_handler(handler_input):
""" Cancel and stop intents: just say goodbye."""
handler_input.response_builder.speak(GOODBYE_MESSAGE).set_card(
SimpleCard(INVOCATION_NAME, GOODBYE_MESSAGE))
return handler_input.response_builder.response
@sb.request_handler(can_handle_func=is_request_type("SessionEndedRequest"))
def session_ended_handler(handler_input):
return handler_input.response_builder.response
# Global exception handler
@sb.exception_handler(can_handle_func=lambda i, e: True)
def all_exception_handler(handler_input, exception):
"""Log the exception to CloudWatch, and return a generic error response."""
print("Encountered following exception: {}".format(exception))
handler_input.response_builder.speak(ERROR_MESSAGE).ask(ERROR_MESSAGE)
return handler_input.response_builder.response
# Interceptors for request and response logging
@sb.global_request_interceptor()
def log_request(handler_input):
"""Log request to CloudWatch"""
print("Skill request: {}\n".format(handler_input.request_envelope.request))
@sb.global_response_interceptor()
def log_response(handler_input, response):
"""Log response to CloudWatch"""
print("Skill response: {}\n".format(response))
# handler is the lambda function entry point.
handler = sb.lambda_handler()
# For testing only: Invoke lambda handler on event contained in a file in JSON format.
if __name__ == '__main__':
with open(sys.argv[1]) as f:
event = json.load(f)
handler(event, None)