barber

const Alexa = require('alexa-sdk');
const moment = require('moment');

const languageStrings = {
    'en-GB': {
        'translation': {
            'WELCOME_MESSAGE' : 'Hello World!',
            'LAST_HAIRCUT'   : 'Your last haircut was %s',
            'HAIRCUT_SAVED_SUCCESSFULLY'   : "Ok, I'll remember this haircut",
            'UNHANDLED'   : "I'm sorry, I didn't catch that. What would you like to do?",
            'GOODBYE'   : "Goodbye",
            'TODAY'   : "Today",
            'ERROR_SAVING_HAIRCUT'   : 'Error saving haircut'
        }
    },
    'en-US': {
        'translation': {
            'WELCOME_MESSAGE' : 'Hello World!',
            'LAST_HAIRCUT'   : 'Your last haircut was %s',
            'HAIRCUT_SAVED_SUCCESSFULLY'   : "Ok, I'll remember this haircut",
            'UNHANDLED'   : "I'm sorry, I didn't catch that. What would you like to do?",
            'GOODBYE'   : "Goodbye",
            'TODAY'   : "Today",
            'ERROR_SAVING_HAIRCUT'   : 'Error saving haircut'
        }
    },
    'de-DE': {
        'translation': {
            'WELCOME_MESSAGE' : 'Hallo Welt!',
            'CONFIRMATION'   : 'Genau'
        }
    }
};

const handlers = {

    'LaunchRequest': function() {
        if(this.attributes && !this.attributes.haircuts ) {
            this.attributes.haircuts = [];
        }
        this.emit(':ask', this.t('WELCOME_MESSAGE'));
    },

    'SaveHaircutIntent' : function() {
        var date = moment(this.event.request.intent.slots.NEW_HAIRCUT_DATE.value);
        if(date.isValid()) {
            // date is ok
            var dateString = date.toJSON();
            this.attributes.last_haircut = dateString;
            if(!Array.isArray(this.attributes.haircuts)) {
                this.attributes.haircuts = [];
            }
            this.attributes.haircuts.push(dateString);
            this.emit(':tell', this.t('HAIRCUT_SAVED_SUCCESSFULLY'));

        } else {
            //invalid date
            this.emit(':ask', this.t('UNHANDLED'));
        }
    },

    'GetLastHaircutIntent' : function() {
        moment.locale(this.event.request.locale);
        var last_haircut = this.attributes.last_haircut;
        var last_haircut_date = moment(last_haircut);

        if(last_haircut && last_haircut_date.isValid()) {
            var diff_string = '';
            if (last_haircut_date.diff(moment().startOf('day')) === 0) {
                diff_string = this.t('TODAY');
            } else if(last_haircut_date.diff(moment().startOf('day'),'days') >= 2){
                diff_string = last_haircut_date.from(moment().startOf('day'));
            } else {
                diff_string = last_haircut_date.from(moment());
            }
            
            this.emit(':tell', this.t('LAST_HAIRCUT', diff_string));
        }
        

    },

    'AMAZON.CancelIntent' : function() {
         this.emit(':tell', this.t('GOODBYE'));
    },

    'AMAZON.HelpIntent' : function() {
         this.emit(':tell', this.t('UNHANDLED'));
    },

    'AMAZON.StopIntent' : function() {
         this.emit(':tell', this.t('GOODBYE'));
    },

    'Unhandled': function() {
        this.emit(':ask', this.t('UNHANDLED'));
    },

    'SessionEndedRequest': function () {
        this.emit(':saveState', true);
    },

};

exports.handler = (event, context, callback) => {
    const alexa = Alexa.handler(event, context, callback);
    alexa.appId = 'amzn1.ask.skill.4364040b-4b88-4dd9-ae42-560141632776';
    alexa.resources = languageStrings;
    alexa.dynamoDBTableName = "barber";
    alexa.registerHandlers(handlers);
    alexa.execute();
}