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lambda_function.py
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lambda_function.py
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import logging
import os
import time
logger = logging.getLogger()
logger.setLevel(logging.DEBUG)
FAVORITEANIMAL = ['monkey']
# --- Helpers that build all of the responses ---
def elicit_slot(session_attributes, intent_name, slots, slot_to_elicit, message):
return {
'sessionAttributes': session_attributes,
'dialogAction': {
'type': 'ElicitSlot',
'intentName': intent_name,
'slots': slots,
'slotToElicit': slot_to_elicit,
'message': message
}
}
def confirm_intent(session_attributes, intent_name, slots, message):
return {
'sessionAttributes': session_attributes,
'dialogAction': {
'type': 'ConfirmIntent',
'intentName': intent_name,
'slots': slots,
'message': message
}
}
def close(session_attributes, fulfillment_state, message):
response = {
'sessionAttributes': session_attributes,
'dialogAction': {
'type': 'Close',
'fulfillmentState': fulfillment_state,
'message': message
}
}
return response
def delegate(session_attributes, slots):
return {
'sessionAttributes': session_attributes,
'dialogAction': {
'type': 'Delegate',
'slots': slots
}
}
# --- Helper Functions ---
# --- Functions that control the bot's behavior ---
def zoo_chatter(intent_request):
"""
Performs dialog management and chat with the end user.
"""
session_attributes = intent_request['sessionAttributes'] if intent_request['sessionAttributes'] is not None else {}
slots = intent_request['currentIntent']['slots']
weather = slots['Weather']
go_before = slots['GoBefore']
animals = slots['Animals']
favorite_animal = slots['FavoriteAnimal']
eat_food = slots['EatFood']
if (not weather) or (not go_before):
return delegate(session_attributes, intent_request['currentIntent']['slots'])
elif (not animals) and (go_before == 'Yes'):
return elicit_slot(
session_attributes,
intent_request['currentIntent']['name'],
intent_request['currentIntent']['slots'],
'Animals',
{
'contentType': 'PlainText',
'content': 'What animals can you see in the zoo this time?'
}
)
elif (not animals) and (go_before == 'No'):
return elicit_slot(
session_attributes,
intent_request['currentIntent']['name'],
intent_request['currentIntent']['slots'],
'Animals',
{
'contentType': 'PlainText',
'content': 'So it\'s your first time to go to zoo, what animals can you see in the zoo?'
}
)
elif (not favorite_animal) and (animals == 'I don\'t know'):
if session_attributes.has_key('animals_retry'):
# int() is needed because any parameter in session_attributes will be changed to string as transfered
session_attributes['animals_retry'] = int(session_attributes['animals_retry'])
logger.debug('session_attributes.animals_retry={}'.format(session_attributes['animals_retry']))
print (session_attributes['animals_retry'] > 3)
if (session_attributes.has_key('animals_retry')) and (session_attributes['animals_retry'] > 2):
return close(
session_attributes,
'Fulfilled',
{
'contentType': 'PlainText',
'content': 'You need to learn how to describe animals in English. See you.'
}
)
elif session_attributes.has_key('animals_retry'):
session_attributes['animals_retry'] += 1
else:
session_attributes['animals_retry'] = 1
if session_attributes.has_key('animals_retry'):
logger.debug('session_attributes.animals_retry={}'.format(session_attributes['animals_retry']))
print (session_attributes['animals_retry'] > 3)
return elicit_slot(
session_attributes,
intent_request['currentIntent']['name'],
intent_request['currentIntent']['slots'],
'Animals',
{
'contentType': 'PlainText',
'content': 'Normally it could see monkeys, lions, elephants and pandas in the zoo. What animals can you see in the zoo?'
}
)
elif not favorite_animal:
return delegate(session_attributes, intent_request['currentIntent']['slots'])
elif not eat_food:
if favorite_animal in FAVORITEANIMAL:
content = 'My favorite animal is {0} too! Do you know what {0} like to eat?'.format(favorite_animal)
else:
content = 'My favorite animal is monkey! Do you know what monkeys like to eat?'
return elicit_slot(
session_attributes,
intent_request['currentIntent']['name'],
intent_request['currentIntent']['slots'],
'EatFood',
{
'contentType': 'PlainText',
'content': content
}
)
else:
return close(
session_attributes,
'Fulfilled',
{
'contentType': 'PlainText',
'content': 'It\'s really nice to chat with you! See you.'
}
)
# --- Intents ---
def dispatch(intent_request):
"""
Called when the user specifies an intent for this bot.
"""
logger.debug('dispatch userId={}, intentName={}'.format(intent_request['userId'], intent_request['currentIntent']['name']))
intent_name = intent_request['currentIntent']['name']
# Dispatch to your bot's intent handlers
if intent_name == 'Zoo':
return zoo_chatter(intent_request)
raise Exception('Intent with name ' + intent_name + ' not supported')
# --- Main handler ---
def lambda_handler(event, context):
"""
Route the incoming request based on intent.
The JSON body of the request is provided in the event slot.
"""
# By default, treat the user request as coming from the America/New_York time zone.
os.environ['TZ'] = 'America/New_York'
time.tzset()
logger.debug('event.bot.name={}'.format(event['bot']['name']))
return dispatch(event)