INWX.de Domain-"price sorter"

inwx-pricesorter.user.js

// ==UserScript==
// @name       inwx.de price-sorter
// @namespace  inwx.de-price-sorter-SD12
// @version    0.1
// @description  appends buttons to the domain list to sort the list after prices
// @match      http://www.inwx.de/de/domain/*
// @copyright  2012+, Stefan Dietz <dev@stefan-dietz.eu>
// ==/UserScript==

var appendControls = function() {

    var fd_result = document.getElementById('fd_result');

    var sortWrapper = document.createElement('div');
        sortWrapper.id = 'sortWrapper';
        sortWrapper.style.marginBottom = '35px';
        sortWrapper.style.clear = 'both';

    var btn_upward = document.createElement('button');
        btn_upward.style.float = 'right';
        btn_upward.innerHTML = '▲ price upward'
        btn_upward.addEventListener('click', sort_upward);
    
    var btn_downward = document.createElement('button');
        btn_downward.style.float = 'right';
        btn_downward.innerHTML = '▼ price downward';
        btn_downward.addEventListener('click', sort_downward);


    sortWrapper.appendChild(btn_downward);    
    sortWrapper.appendChild(btn_upward);

    fd_result.parentNode.insertBefore(sortWrapper, fd_result);
}

window.onload = function() {
    appendControls();    
}

var sort_downward = function() {
    sort(true);
}

var sort_upward = function() {
    sort(false);
}
    
var sort = function(reverse) {
    var domainList = document.querySelectorAll('div[id^=domain_container_]:not(.check_domain_row_taken)');
    var items = new Array();
    
    for( var i in domainList ) {
        if (domainList[i].nodeType !== 1) {
            continue;
        }
       
        var node = domainList[i].cloneNode(true);
        var priceSpan = node.querySelector('.domain_extra span');
        if(priceSpan === null) {
            continue;
        }
        var originalPrice = priceSpan.querySelector('font');
        
        if( originalPrice != null ) {
            priceSpan.removeChild(originalPrice);
        }

        var price = parseFloat(priceSpan.innerText.replace('.', '').match(/[0-9]+(,)?[0-9]+/)[0].replace(',', '.'))
        items.push({
            'node': domainList[i],
            'price': price
        });
    }

    items.sort(function(a, b) {
        return a.price == b.price
          ? 0
          : (a.price > b.price ? 1 : -1);
    });
    
    if( reverse === true ) {
        items = items.reverse();
    }
    
    var unavailableDomains = document.querySelectorAll('div[id^=domain_container_].check_domain_row_taken');

    var newList = document.getElementById('fd_result').cloneNode();
        
    items.forEach(function(item) {
        newList.appendChild(item.node);
    });


    unavailableDomains = Array.prototype.slice.call(unavailableDomains);
    unavailableDomains.forEach(function(item) {
        newList.appendChild(item);
    });

    var oldNode = document.getElementById('fd_result');
        oldNode.parentNode.replaceChild(newList, oldNode);
}
    
Array.prototype.reverse = function () {  
  var tmp_arr = new Array();
  for (var i = this.length - 1; i >= 0; i--)
  {      
    tmp_arr.push (this[i]);
  }
  return tmp_arr;
}