libs/js/jquery-mobile-1.0.1pre/experiments/converter/storage.js

   1 (function() {
   2
   3 var defaults = [
   4         {
   5                 type: "currency",
   6                 from: "USD",
   7                 to: "EUR"
   8         },
   9         {
  10                 type: "currency",
  11                 from: "GBP",
  12                 to: "EUR"
  13         }
  14         // TODO add back in as defaults once its possible to add other conversions, not just currencies
  15         /*,
  16         {
  17                 type: "distance",
  18                 from: "Miles",
  19                 to: "Kilometer",
  20                 rate: 1.609344
  21         },
  22         {
  23                 type: "distance",
  24                 from: "inch",
  25                 to: "centimeter",
  26                 rate: 2.54
  27         }*/
  28 ];
  29
  30 // TODO fallback to whatever else when localStorage isn't available
  31 function get() {
  32         return JSON.parse( localStorage.getItem( "conversions" ) );
  33 }
  34 function set( value ) {
  35         localStorage.setItem( "conversions", JSON.stringify( value ) );
  36 }
  37
  38 var conversions = get( "conversions" );
  39 if ( !conversions ) {
  40         conversions = defaults.slice();
  41         set( conversions );
  42 }
  43 window.conversions = {
  44         store: function() {
  45                 set( conversions );
  46         },
  47         all: function() {
  48                 return conversions;
  49         },
  50         clear: function() {
  51                 conversions.length = 0;
  52                 this.store();
  53         },
  54         restore: function() {
  55                 conversions.length = 0;
  56                 $.extend( conversions, defaults );
  57                 this.store();
  58         },
  59         remove: function( tofrom ) {
  60                 $.each( conversions, function( index, conversion ) {
  61                         if ( ( conversion.from + conversion.to ) === tofrom ) {
  62                                 conversions.splice( index, 1 );
  63                                 return false;
  64                         }
  65                 });
  66                 this.store();
  67         }
  68 };
  69
  70 })();