cardsforscience/js/helpers.js

/** @module Helpers
 * Define some useful helpers that are used throughout the game.
 */
var ObjectStorage = require("js/storage");
var Helpers = (function (ObjectStorage) {
    'use strict';
    /** Load a file (usually JSON).
     */
    var loadFile = function (filename) {
        var res;
        $.ajax({
            async: false,
            url: filename,
            success: function (data) {
                res = data;
            }
        });
        return res;
    };

    /** Format a number with proper postfix.
     */
    var formatNumberPostfix = function (number) {
        if (typeof number !== "number") {
            return 0;
        }

        var prefixes = [{
            magnitude: 1e24,
            label: 'Y'
        }, {
            magnitude: 1e21,
            label: 'Z'
        }, {
            magnitude: 1e18,
            label: 'E'
        }, {
            magnitude: 1e15,
            label: 'P'
        }, {
            magnitude: 1e12,
            label: 'T'
        }, {
            magnitude: 1e9,
            label: 'B'
        }, {
            magnitude: 1e6,
            label: 'M'
        }, {
            magnitude: 1e3,
            label: 'k'
        }];

        var abs = Math.abs(number);
        for (var i = 0; i < prefixes.length; i++) {
            if (abs >= prefixes[i].magnitude) {
                return (number / prefixes[i].magnitude).toFixed(1) + prefixes[i].label;
            }
        }
        return number;
    }

    var formatTime = function (msec) {
        var totals = Math.ceil(msec / 1000);
        var days = Math.floor(totals / (24 * 60 * 60));
        var hours = Math.floor((totals % (24 * 60 * 60)) / (60 * 60));
        var totalmin = (totals % (24 * 60 * 60)) % (60 * 60);
        var mins = Math.floor(totalmin / 60);
        var secs = totalmin % 60;

        var str = [];
        if (days > 0) {
            str.push(days + ' day' + (days % 100 == 1 ? '' : 's'));
        }
        if (hours > 0) {
            str.push(hours + ' h');
        }
        if (mins > 0) {
            str.push(mins + ' min');
        }
        if (secs > 0) {
            str.push(secs + ' s');
        }

        return str.join(', ');
    };

    var saveVersion = '1.0';
    var validateSaveVersion = function () {
        var ver = ObjectStorage.load('saveVersion');
        if (typeof ver === 'undefined' || ver != saveVersion) {
            ObjectStorage.clear();
            ObjectStorage.save('saveVersion', saveVersion);
        }
    };

    return {
        loadFile: loadFile,
        formatNumberPostfix: formatNumberPostfix,
        formatTime: formatTime,
        validateSaveVersion: validateSaveVersion,
        analytics: ''
    };
})(ObjectStorage);
module.exports=Helpers;