Netpincer Sorting

Adds option to sort by various informations.
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// ==UserScript==
// @name          Netpincer Sorting
// @namespace     http://userscripts.org/users/20715
// @description   Adds option to sort by various informations.
// @include       http://www.netpincer.hu/*hazhozszallitas*
// @version       2.0
// ==/UserScript==

$(function () {
  var
    doc = document,
    options = {
      'positive': 'Ízlett',
      'negative': 'Nem ízlett',
      'time':     'Kiszállítási idő',
      'min':      'Minimális rendelés',
      'delivery': 'Szállítási költség',
      'percent':  'Százalék'
    },
    orders = { '↑': false, '↓': true },
    $container = $('div.shop-list-content'),
    $caterers = $('div.shop-list-row', $container);

  function parseTime(timeText) {
    var timeValues = timeText.split('-');
    return (parseInt(timeValues[0], 10) + parseInt(timeValues[1], 10)) / 2;
  }

  function parseCurrency(currencyText) {
    var currencyValue = currencyText.replace(/\D/g, '');
    return parseFloat(currencyValue);
  }

  /*
   * this method sorts the caterers in the selected order
   */
  function changeOrder(sortType, sortOrder) {

    /* this is needed because the double causes errors */
    $('script', $caterers).remove();

    var caterers = $caterers.map(function () {
      var
        node = this,
        name = $('h2[itemprop="name"]', node).text().toLowerCase(),
        value = 0;

      switch(sortType) {
        case 'percent':
          value = parseInt($('a.show-reviews span.percent', node).text(), 10);
          break;

        case 'positive':
          value = parseInt($('a.show-reviews img[src*="icon_liked"]', node).parent().text(), 10);
          break;

        case 'negative':
          value = parseInt($('a.show-reviews img[src*="icon_not_liked"]', node).parent().text(), 10);
          break;

        case 'time':
          value = parseTime($('div.shop-delivery-time', node).text());
          break;

        case 'min':
          value = parseCurrency($('div.shop-minimum-order', node).text());
          break;

        case 'delivery':
          value = parseCurrency($('div.shop-delivery-cost', node).text());
          break;
      }

      return { node: node, name: name, value: value };
    });

    /* sort it */
    var sorted = caterers.sort(function ( a, b ) {
      var sortValue = (sortOrder) ? (a.value - b.value) : (b.value - a.value);
      return (sortValue !== 0) ? sortValue : a.name.localeCompare(b.name);
    });

    $caterers.detach();

    /* add items in the sorted order */
    $.each(sorted, function ( i, object ) {
      $(object.node).appendTo($container);
    });

    return false;
  }

  if ($caterers.length === 0) {
    return;
  }

  /*
   * Add options to the header
   */
  var
    $header = $('div.general-title'),
    $ul = $(doc.createElement('ul'))
      .css({
        clear:      'both',
        padding:    '0.5em 0'
      }).appendTo($header);

  $.each(options, function (sortType, sortDescription) {
    var $li = $(doc.createElement('li'))
      .css({
        display:   'inline',
        fontSize:  '0.7em',
        padding:   '0 0.5em'
      })
      .appendTo($ul);
      $(doc.createTextNode(' ')).appendTo($ul);

    $.each(orders, function (sortSign, sortOrder) {
      var sortText = sortDescription.concat(' ', sortSign, ' ');

      $(doc.createElement('a')).css('cursor', 'pointer').text(sortText).bind('click', function ( e ) {
        e.stopPropagation();
        return changeOrder.apply(this, [ sortType, sortOrder ]);
      }).appendTo($li);

    });
  });
});

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