service: flood-watch

provider:
  name: aws
  runtime: nodejs4.3
  region: eu-west-1
  iamRoleStatements:
  - Effect: "Allow"
    Action:
      - "s3:PutObject"
      - ...
    Resource: "arn:aws:s3:::floods/*"

functions:
  floodsOverview:
    handler: handler.getFloodsData
    events:
      - schedule: rate(15 minutes)
  floodWatch:
    handler: handler.floodWatchSkill
    events:
      - alexaSkill

module.exports.getFloodsData = function(event, context, callback) {
    request('https://api.ffc-environment-agency.fgs.metoffice.gov.uk/api/public/statements')
      .then((floodsData) => {
        let floodWarnings = JSON.parse(floodsData).statements;

        let warning = floodWarnings.filter(function(floodWarning) {
            let parsedDate = Date.parse(floodWarning.issued_at);

            return moment(parsedDate).format('DDMMYYYY') == 
            moment().format('DDMMYYYY');
        })[0];

        if (typeof warning == 'object') {
            let filesystem = new S3FS('floods', {region: 'eu-west-1'});

            filesystem.writeFile(
                'current.json', 
                JSON.stringify(warning), 
                function (err) {
                    if (err) throw err;
                }
            );
        }
    });
}

module.exports.floodWatchSkill = function(event, context, callback) {
    let alexa = Alexa.handler(event, context);
    alexa.appId = 'amzn1.ask.skill.88bf3bae-SECRET-APP-ID';
    alexa.registerHandlers(handlers);
    alexa.execute();
};

let handlers = {
    'LaunchRequest': function () {
        this.emit('GetOverviewIntent');
    },
    'GetOverviewIntent': function () {
        let filesystem = new S3FS('floods', {region: 'eu-west-1'});

        filesystem.exists('current.json', (fileExists) => {
            if (fileExists) {
                filesystem.readFile('current.json', "utf-8", (err, warning) => {
                    if (err) throw err;

                    let floodWarning = JSON.parse(warning);

                    this.emit(':tell', 
                        floodWarning.public_forecast.english_forecast
                    );
                });
            }
        });
    },
    'Unhandled': function() {
        this.emit(':ask', 
            'Sorry, I didn\'t get that. Please try again.', 'Please try again.'
        );
    }
};