log_nest.js

/*
Handle a push from IFTTT when my Nest goes into Home / Away
mode, and log the date with current (outside) weather conditions.
*/

var date = new Date();
var MongoClient = require('mongodb').MongoClient;
var Request = require('request');

module.exports = function (input, bail) {
    // Pass the api key in with the request.
    var WeatherUnderground = 'https://api.wunderground.com/api/' +
        input.data.WU_API_KEY +
        '/conditions/q/zmw:23456.1.99999.json';

    Request(WeatherUnderground, function (error, response, body) {
        if (!error && response.statusCode == 200) {
            // parse the json response from WU api
            var weather = JSON.parse(body).current_observation;
            // console.log(weather.relative_humidity);
            // console.log(weather.temp_f);
            // console.log(weather.pressure_in);
            // console.log(weather.weather);
        };
        MongoClient.connect(input.data.MONGO_URL, function (err, db) {
            if(err) return done(err);
            var collection = db.collection('home_and_away');
            collection.insert({
                "date":date,
                "change":input.data.change,
                "outside_temp":weather.temp_f,
                "outside_humidity":weather.relative_humidity,
                "pressure":weather.pressure_in,
                "conditions":weather.weather
            });
        });

        bail(null, 'Logged with location conditions: ' +
            weather.temp_f + 'F, ' +
            weather.relative_humidity + ' humidity, ' +
            weather.pressure_in + ' pressure, ' +
            'under ' + weather.weather + ' conditions.'
        );
    })
}