Adds Basic user search / filter bar to GoG.com forums for use in Mafia Games

gogMafiaSearch.user.js

// ==UserScript==
// @name         GoG Mafia Search
// @namespace    https://gist.github.com/adaliabooks/
// @version      0.1
// @description  Adds Basic user search / filter bar to GoG.com forums for use in Mafia Games
// @author       adaliabooks
// @match        https://gist.github.com/adaliabooks/c72b36bc3d85aa5764a3
// @grant        none
// @include http://www.gog.com/forum/*
// ==/UserScript==

jQuery.expr[':'].Contains = function(a, i, m) {
  			return jQuery(a).text().toUpperCase()
      			.indexOf(m[3].toUpperCase()) >= 0;
		}; 		

function FolderDepthFunction(the_url)
		{
	    		var the_arr = the_url.split('/');
	    		return the_arr.length;
		}
function RemoveLastDirectoryPartOf(the_url)
		{
	    		var the_arr = the_url.split('/');
    			the_arr.pop();
	    		return( the_arr.join('/') );
		}
function RemoveLastDirIfLonger(the_url, length)
        {
		if (FolderDepthFunction(the_url) > length)
		{
                	return RemoveLastDirectoryPartOf(the_url);
                }
                else
                {
			return the_url;
                }
        }
function GetFirstPartOfDirectory(the_url)
		{
	    		var the_arr = the_url.split('/');
	    		return the_arr[0];
		}
function addGlobalStyle(css) {
    var head, style;
    head = document.getElementsByTagName('head')[0];
    if (!head) { return; }
    style = document.createElement('style');
    style.type = 'text/css';
    style.innerHTML = css;
    head.appendChild(style);
}

addGlobalStyle('#gogSearchBox {   background-color: #474747;  padding: 15px 17px 0 10px;  height: 29px; color: #a1a1a1;  font-size: 12px; }');
addGlobalStyle('div.nav_bar_top_h {  width: 950px; height: 105px; margin: 0 23px 0 23px;  padding: 28px 0 0 0;  position: relative;}');

var $filterbar = $( '<div id="gogSearchBox"><p style="display: inline;">Username: </p><input type="text"value="" id="username_box" style="display: inline; margin-right: 10px;"><p style="display:inline;">First Page: </p><input type="text" value="" id="startpage_box" style="display:inline; margin-right: 10px;"><p style="display: inline;">End Page: </p><input type="text" value="" id="endpage_box" style="display: inline; margin-right: 10px;"><a id="filter_go" style="display: inline; margin-right:20px;">Go</a><a id="filter_votes" style="display: inline;">Filter Votes</a></div>' );

	$( ".nav_bar_top_h" ).prepend($filterbar);
	$( "#filter_go" ).on("click", function () {
	jQuery('.spot_h').remove();
	var endpage = parseInt($("#endpage_box").val());
	var startpage = parseInt($("#startpage_box").val());
	for (var i = endpage; i > startpage; i--) 
	{
		var fullURL = window.location.pathname;
		var threadURL = RemoveLastDirIfLonger(fullURL, 4) + "/page" + i + " .spot_h";
		if (!$(".page" + i + "posts").length)
		{
		var $newdiv = $( "<div class='page" + i + "posts'/>" )
		}
		$( ".list_h" ).prepend($newdiv)
		$( ".page" + i + "posts").load(threadURL, function() {
            if ($("#username_box").val())
            {
  			   $( ".b_u_name" )
	  		   .contents()
	    		 .filter(function() {
      			 return this.nodeType === 3;
    			 })
	      		 .wrap( "<a></a>" )
      			 .end()
               jQuery('.b_u_name a:not(:Contains(' + $("#username_box").val() + '))').parents('.spot_h').remove();
            }
		})
	}
	});
	
	$( "#filter_votes" ).on("click", function () {
	jQuery('.spot_h').remove();
	var endpage = parseInt($("#endpage_box").val());
	var startpage = parseInt($("#startpage_box").val());
	for (var i = endpage; i > startpage; i--) 
	{
		var fullURL = window.location.pathname;
		var threadURL = RemoveLastDirIfLonger(fullURL, 4) + "/page" + i + " .spot_h";
		if (!$(".page" + i + "posts").length)
		{
			var $newdiv = $( "<div class='page" + i + "posts'/>" )
		}
		$( ".list_h" ).prepend($newdiv)
		$( ".page" + i + "posts").load(threadURL, function() {
			jQuery('.post_text_c:not(:has(span.bold:Contains(vote)))').parents('.spot_h').remove();
		})
	}
	});