utils.js

/* module for utilities functions */

define(['jquery'],function($){

  // to check the start of a string
  if (typeof String.prototype.startsWith != 'function') {
    String.prototype.startsWith = function (str){
      return this.indexOf(str) == 0;
    };
  }

  return {

    // log a message to the console if it exists else discard
    log: function(m){
      if (typeof console !== 'undefined'){
        console.log(m);        
      }
    },

    // clean up a dom object (article to display)
    cleanArticle: function(content, domain){
      var data = "<article>" + content + "</article>";
      var $dom = $(data);

      /* ARS Technica styles DIVs */
      $dom.find('div').removeAttr('style');
      
      /* ARS technica bookmarks */
      $dom.find('div.feedflare').remove();
      
      /* Feedburner images */
      $dom.find('img[href~="feedburner"]').remove();
      
      
      var $toClean = $dom.find('img,object,iframe');
      $toClean.removeAttr('height');
        
      $toClean.each(
        function(index, e){
             
          // if relativeURL, add domain
          var src = $(e).attr('src');
          if ($.mobile.path.isRelativeUrl(src)){
            var newsrc = $.mobile.path.makeUrlAbsolute(
              src,
              domain
            );
            $(e).attr('src', newsrc);
          }      
        }
      );

      // make all links open in a new tab
      $toClean = $dom.find('a');
      $toClean.each(
        function(index, e){
          $(e).attr('target', '_blank');
        }
      );

      return $dom;
    }, //cleanArticle



    /* returns a valid formatted string of the update
       time representation of Tiny Tiny RSS */
    updateTimeToString: function(time){
      var date = new Date(time * 1000); 
      var now = new Date(Date.now());

      // date in YYYY-MM-DD
      var year = date.getFullYear();
      var month = date.getMonth() + 1;
      month = (month < 10 ? "0" : "") + month;
      var day = date.getDate();
      day = (day < 10 ? "0" : "") + day;
      var dateStr = year + "-" + month + "-" + day;

      // time in HH:MM
      var hour = date.getHours();
      hour = (hour < 10 ? "0" : "") + hour;
      var min = date.getMinutes();
      min = (min < 10 ? "0" : "") + min;
      var  timeStr = hour + ":" + min;

      // now in YYYY-MM-DD
      year = now.getFullYear();
      month = now.getMonth() + 1;
      month = (month < 10 ? "0" : "") + month;
      day = now.getDate();
      day = (day < 10 ? "0" : "") + day;
      var nowStr = year + "-" + month + "-" + day;

      // if today, puts the time of day
      if (dateStr == nowStr){
        // only time if it's today
        dateStr = timeStr;
      } else {
        dateStr = dateStr + " " + timeStr;
      }

      return dateStr;
    }, //updateTimeToString


    localStorageSupport: function(){

      //taken from https://developer.mozilla.org/en-US/docs/DOM/Storage#localStorage
      if (!window.localStorage) {
        window.localStorage = {
          getItem: function (sKey) {
            if (!sKey || !this.hasOwnProperty(sKey)) { return null; }
            return unescape(document.cookie.replace(new RegExp("(?:^|.*;\\s*)" + escape(sKey).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*"), "$1"));
          },
          key: function (nKeyId) {
            return unescape(document.cookie.replace(/\s*\=(?:.(?!;))*$/, "").split(/\s*\=(?:[^;](?!;))*[^;]?;\s*/)[nKeyId]);
          },
          setItem: function (sKey, sValue) {
            if(!sKey) { return; }
            document.cookie = escape(sKey) + "=" + escape(sValue) + "; expires=Tue, 19 Jan 2038 03:14:07 GMT; path=/";
            this.length = document.cookie.match(/\=/g).length;
          },
          length: 0,
          removeItem: function (sKey) {
            if (!sKey || !this.hasOwnProperty(sKey)) { return; }
            document.cookie = escape(sKey) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/";
            this.length--;
          },
          hasOwnProperty: function (sKey) {
            return (new RegExp("(?:^|;\\s*)" + escape(sKey).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=")).test(document.cookie);
          }
        };
        window.localStorage.length = (document.cookie.match(/\=/g) || window.localStorage).length;
      } //if
    }, // localStorageSupport

    removeAllAttributes: function(element){

      while (element.attributes.length > 0){
        element.removeAttribute(
          element.attributes[0].name
        );
      }

    }, //removeAllAttributes

    // to get the current article ID from the fragment
    getCurrentArtId: function(){
      var f  = Backbone.history.fragment;
      var re = /^cat-?\d+\/feed-?\d+\/art(\d+)$/;
      var id = f.replace(re, "$1");

      return parseInt(id);
    },

    // to get the current feed ID from the fragment
    getCurrentFeedId: function(){
      var f  = Backbone.history.fragment;
      var re = /^cat-?\d+\/feed(-?\d+)(\/.*)?$/;
      var id = f.replace(re, "$1");

      return parseInt(id);
    },       

    // to get the current feed ID from the fragment
    getCurrentCatId: function(){
      var f  = Backbone.history.fragment;
      var re = /^cat(-?\d+)(\/.*)?$/;
      var id = f.replace(re, "$1");

      return parseInt(id);
    }

  } //return

}); //define