Weather.js

/**
 * @class Utils.Weather
 * @author Steven House <[email protected]>
 *
 * This retrieves weather information
 */

// Include underscore awesomness
var _ = require('alloy/underscore')._;
var Alloy = require('alloy');

// Include logging utility
var log = Alloy.Globals.log;
log.debug('[Weather] : Opened Library');

var xhr = require('network/httpClient');


/**
 * Get current weather information given a lat and lng
 * @method getCurrentWeather
 * @param {Object} args
 */
exports.getCurrentWeather = function(args) {
    log.debug('[Weather] : createNode() with args: ', args);
    args = args || {};

    // Callbacks
    var success = args.success ? args.success : function() {};
    var error = args.error ? args.error : function() {};

    // Lat and Lng Paramaters
    var lat = args.lat ? args.lat : false;
    var lng = args.lng ? args.lng : false;

    // Bail if lat and lng not provided
    if (!lat || !lng) {
        log.warn(
            "[weather] : Attempted to get current weather w/o Lan / Lng"
        );
        return false;
    }

    var url = "http://api.openweathermap.org/data/2.5/find?lat=" + lng +
        "&lon=" + lat + "&cnt=1";

    // Setup for xhr call via httpClient.js
    var xhrSetup = {};

    xhrSetup.requestType = "GET";
    xhrSetup.parseJSON = true;
    xhrSetup.url = url;

    xhrSetup.data = {};

    xhrSetup.success = function(resp) {
        if (resp.cod) {

        }

        success(resp);
        done(resp);
    };

    xhrSetup.error = function(err, context) {
        error(err, context);
        done(err, context);
    };

    xhr.request(xhrSetup);

};

/**
 * Convert Kelvin to Fahrenheit
 * (K - 273.15)* 1.8000 + 32.00
 * @method kelvinToFahrenheit
 */
function kelvinToFahrenheit(degKelvin) {
    var degF = (degKelvin - 273.15) * 1.8000 + 32.00;
    return degF;
}

// An example response for current weather conditions
var exampleResp = {
    message: "accurate",
    cod: "200",
    count: 1,
    list: [{
        id: 4393217,
        name: "Kansas City",
        coord: {
            lon: -94.578568,
            lat: 39.099731
        },
        main: {
            temp: 295.34,
            pressure: 1002,
            humidity: 53,
            temp_min: 295.15,
            temp_max: 296.15
        },
        dt: 1414428840,
        wind: {
            speed: 5.7,
            deg: 200,
            gust: 10.8
        },
        sys: {
            country: ""
        },
        clouds: {
            all: 1
        },
        weather: [{
            id: 800,
            main: "Clear",
            description: "Sky is Clear",
            icon: "01d"
                //http://openweathermap.org/img/w/01d.png
        }]
    }]
}