aws chaliceとlambda(python)でalexaスキルをサックリ作る話。DialogDelegateも使うでよ。

$ cd !$
$ git init
$ git add remote origin [email protected]:ikegam1/alexa-proglang.git
$ git merge --allow-unrelated-histories origin/master <- git pullしたら.gitignoreがぶつかったのでmergeした
$ git add . && git commit -m 'init' && git push -u origin master
$ source ../venv/bin/activate <- 一つ上にvenv関連のがある

{
  "version": "2.0",
  "app_name": "alexa-proglang",
  "prod": {
      "environment_variables":
      {
          "DEBUG_MODE": "1"
      },
      "lambda_timeout": 120,
      "lambda_memory_size": 128,
      "lambda_functions": {
          "default": {}
      }
  }
}

from chalice import Chalice
import logging
import json
import random
import re
import os
import sys
import alexa-speech

app = Chalice(app_name='alexa-proglang')
logger = logging.getLogger()
debug = os.environ.get('DEBUG_MODE')
if debug == '1':
    logger.setLevel(logging.INFO)
else:
    logger.setLevel(logging.ERROR)


@app.lambda_function()
def default(event, context):
    return welcomeIntent()

def welcomeIntent():
    #何を聞かれてもこんにちはと返しておきます
    return alexa-speech.QuestionSpeech('こんにちは').build()

class BaseSpeech:
    def __init__(self, speech_text, should_end_session, session_attributes=None, reprompt=None):

        """
        引数:
            speech_text: Alexaに喋らせたいテキスト
            should_end_session: このやり取りでスキルを終了させる場合はTrue, 続けるならFalse
            session_attributes: 引き継ぎたいデータが入った辞書
            reprompt:
        """
        if session_attributes is None:
            session_attributes = {}

        self._response = {
            'version': '1.0',
            'sessionAttributes': session_attributes,
            'response': {
                'outputSpeech': {
                    'type': 'SSML',
                    'ssml': '<speak>'+speech_text+'</speak>'
                },
                'shouldEndSession': should_end_session,
            },
        }

        if reprompt is None:
           pass
        else:
           """リプロンプトを追加する"""
           self._response['response']['reprompt'] = {
                'outputSpeech': {
                    'type': 'SSML',
                    'ssml': '<speak>'+reprompt+'</speak>'
                }
           }

        self.speech_text = speech_text
        self.should_end_session = should_end_session
        self.session_attributes = session_attributes

    def build(self):
        return self._response


class OneSpeech(BaseSpeech):
    """1度だけ発話する(ユーザーの返事は待たず、スキル終了)"""

    def __init__(self, speech_text, session_attributes=None):
        super().__init__(speech_text, True, session_attributes)


class QuestionSpeech(BaseSpeech):
    """発話し、ユーザーの返事を待つ"""

    def __init__(self, speech_text, session_attributes=None, reprompt=None):
        super().__init__(speech_text, False, session_attributes, reprompt)

class DialogDelegate(BaseSpeech):

    def __init__(self, speech_text='', session_attributes=None, reprompt=None):
        super().__init__(speech_text, False, session_attributes, reprompt)

    def build(self):
        self._response['response'] = {
                "directives": [{
                    "type": "Dialog.Delegate"
                }]
            }
        return self._response

$ chalice deploy

def onDialogState(request, intent, dialogState):
    if dialogState == 'STARTED':
        return alexa_speech.DialogDelegate().build()
    if dialogState == 'IN_PROGRESS':
        if 'value' not in intent['slots']['emotionSlot']:
            return alexa_speech.DialogDelegate().build()
        elif 'value' not in intent['slots']['hopeSlot']:
            return alexa_speech.DialogDelegate().build()
        elif 'value' not in intent['slots']['statusSlot']:
            return alexa_speech.DialogDelegate().build()
        elif 'value' not in intent['slots']['weatherSlot']:
            return alexa_speech.DialogDelegate().build()
        elif 'value' not in intent['slots']['hangrySlot']:
            return alexa_speech.DialogDelegate().build()
        else:
            return answerIntent(request, intent, intent['slots'])