gaf-mobile/app/scripts/ext/localStorage.custom.js

GAF mobile Web site

// This is a custom version of hasdavidc's storage polyfill
// https://gist.github.com/hasdavidc/8527456

(function () {

  'use strict';

  function createCookie(name, value, days) {
    var date, expires;

    if (days) {
      date = new Date();
      date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
      expires = '; expires=' + date.toGMTString();
    } else {
      expires = '';
    }
    document.cookie = name + '=' + value + expires +'; path=/';
  }

  function readCookie(name) {
    var nameEQ = name + '=',
        ca = document.cookie.split(';'),
        i, c;

    for (i = 0; i < ca.length; i++) {
      c = ca[i];
      while (c.charAt(0) === ' ') {
        c = c.substring(1, c.length);
      }

      if (c.indexOf(nameEQ) === 0) {
        return c.substring(nameEQ.length, c.length);
      }
    }
    return null;
  }
  
  function setData(data) {
    data = JSON.stringify(data);
    createCookie('localStorage', data, 365);
  }
  
  function clearData() {
    createCookie('localStorage', '', 365);
  }
  
  function getData() {
    var data = readCookie('localStorage');
    return data ? JSON.parse(data) : {};
  }

  if (window.hasOwnProperty('localStorage')) {
    // Handle private browsers (Safari and Firefox) that have
    // localStorages defined but do not support writing to 
    // localStorage and cookies
    // http://stackoverflow.com/questions/14555347
    try {
      var key = 'fl-' + Math.round(Math.random());
      window.localStorage.setItem(key, 'test');
      window.localStorage.removeItem(key); 
    }
    catch (e) {
      console.warn('LocalStorage/Cookies not usable, please disable ' + 
        'Private Browsing or enable local date to be set');
      window.privateBrowser = true;
    }
  }
  else {
    var data = getData();

    window.localStorage = {
      length: 0,
      setItem: function(key, value) {
        data[key] = value + ''; // forces the value to a string
        this.length++;
        setData(data);
      },
      getItem: function(key) {
        return data[key] === undefined ? null : data[key];
      },
      removeItem: function(key) {
        delete data[key];
        this.length--;
        setData(data);
      },
      clear: function() {
        data = {};
        this.length = 0;
        clearData();
      }
    };
  }
}());