<?php
/********************************************************************\
* GoSquared ltd.                                    |css_checker.php *
* Authors: Main code by Geoff http://www.gosquared.com               *
* Extended by Damian http://level0.ch/                               *
* Adapted to OOP by Geoff                                            *
* Date: 10/07                                                        *
* Version: 1.2.0                                                     *
*--------------------------------------------------------------------*
* THIS SCRIPT IS OPEN SOURCE AND MAY BE USED BY ANYONE. SUBSEQUENTLY,*
* THE AUTHORS ACCEPT NO RESPONSIBILITY FOR ITS USAGE NOR GURANTEE ITS*
* RELIABILITY. NONE OF THE AUTHORS STATED ABOVE CAN BE HELD RESPONSI-*
* BLE FOR PROBLEMS RESULTING FROM THE USAGE OF THIS SCRIPT           *
*********************************************************************/
 
class css_scanner{
	public $helptext = "<p>
		<h3>Identify unused CSS</h3>
		Main code: <a href=\"http://www.gosquared.com/liquidicity/archives/203\">http://www.gosquared.com/liquidicity/archives/203</a> by Geoff<br />
		Bug fix & more: <a href=\"http://level0.ch/fileserv/csschecker.php.html\">http://level0.ch/fileserv/csschecker.php.html</a> by Damian<br />
		Further development, bug fixes and additions by Geoff<br />
		<b>Usage:</b><br />
		<ul>
		  <li>http://www.myserver.com/csschecker.php?page=index.html</li>
		  <li>http://www.myserver.com/csschecker.php?page=http://www.another-server.net/index.html</li>
		  <li>http://www.myserver.com/csschecker.php?page=index.html,about.html,download.html</li>
		  <li>http://www.myserver.com/csschecker.php?page=index.html&visual=inline</li>
		  <li>http://www.myserver.com/csschecker.php?page=index.html&visual=iframe</li>
		</ul><br />
		CSS Scanner will look for and scan any embedded or external CSS files in your HTML code.
		  </p>";
	public $page_content = '';
	public $unused = array();
	public $multi_page;
	public $page;
	public $page_content_visual;
 
	function __construct($page){
		//$multi_css = explode(',', $css);
		if(empty($page)){
			echo "No page specified to scan" . $this->helptext;
			exit;
		}
 
		$this->multi_page = explode(',', $page);
		//$css_content = '';
 
		if(count($this->multi_page) > 1){
			$i = 0;
			$this->page_content = array();
			foreach ($this->multi_page as $page) {
			    $this->page_content[$i] = file_get_contents($page);
			    $i++;
			}
		}
		else{
			//$css_content .= file_get_contents($css);
			$this->page = $page;
			$this->page_content = file_get_contents($page);
		}
 
		if(is_array($this->page_content)){
			$i=0;
			foreach($this->page_content as $page_content){
				$this->page = $this->multi_page[$i];
				$this->page_content_visual = $page_content;
				$this->unused = $this->scan($page_content);
				$this->print_report();
				$i++;
			}
		}
		else{
			$this->page_content_visual = $this->page_content;
			$this->unused = $this->scan($this->page_content);
			$this->print_report();
		}
	}
 
	function scan($page_content){
		$i = 0;
		if(ereg("<style( *[\n]*.*)>\n*(.\n*)*<\/style>", $page_content)){
	        if(preg_match_all("/(@\s*import\s* (url((\"|')?)?((\"|')?)|(\"|'){1}).+(\"|')?\)?)/", $page_content, $ext_stylesheets)){
	            foreach($ext_stylesheets[0] as $stylesheet){
	                $css_content[$i] = preg_replace("/(@\s*import\s*)|(url\(?((\"|')?))|(\"|'){1}|\)?(\"|')?;|(\s)/", "", $stylesheet);
	                $i++;
	            }
	            $array = 1;
	        }
	        $inline_notused = $this->check_file($page_content, $page_content);
	    }
	    else die("No page styles, sorry!".$this->helptext);
 
	    $unused = array('internal' => array(), 'external' => array());
 
		if(isset($array) && $array == 1){
			foreach($css_content as $css_file){
				$css = file_get_contents($css_file);
				if(!empty($css)){
				    $not_used = $this->check_file($css, $page_content);
				    array_push($unused['external'], array('css_file' => $css_file, 'external' => $not_used));
				}
			}
		}
		if($inline_notused != false){
			$unused['internal'] = $inline_notused;
		}
		return $unused;
	}
 
	function print_report(){
		echo "<h1>Report for page: ".$this->page.'</h1>';
		foreach($this->unused['external'] as $unused){
			echo 'CSS entries not used from external CSS file '.$unused['css_file'].':<br />';
		    if(count($unused['external']) > 0){
		    foreach($unused['external'] as $entry){
		        echo $entry.'<br />';
		    }
		    }else echo 'None, good job!';
		    echo '<br /><br />';
		}
	    if(count($this->unused['internal'] > 0)){
		    echo 'CSS entries not used from internal CSS code block:<br />';
		    foreach($this->unused['internal'] as $entry){
		        echo $entry.'<br />';
		    }
		    echo '<br /><br />';
		}
		if(isset($_GET["visual"]) && $_GET['visual'] == 'iframe'){
		   echo "<hr><iframe src = \"$this->page\" width=\"100%\" height=\"100%\"></iframe>";
		}
		elseif(isset($_GET["visual"]) && $_GET['visual'] == 'inline'){
			echo "<hr>",
			    $this->page_content_visual;
		}
	}
 
	function check_file($css, $page_content){
		preg_match_all("/\.([a-zA-Z-_][a-zA-Z0-9-_]+)({|[\s].*{)/", $css, $css_classes);
		preg_match_all("/#([a-zA-Z-_][a-zA-Z0-9-_]+)({|[\s][^;]*{)/", $css, $css_ids );
		preg_match_all("/<[a-zA-z0-9][^>]*class\s*=\s*[\"'](.+?)[\"']/", $page_content, $page_classes);
		preg_match_all("/<[a-zA-z0-9][^>]*id\s*=\s*[\"'](.+?)[\"']/", $page_content, $page_ids);
 
		$clean_page_classes = array();
		$clean_page_ids = array();
		foreach($page_classes[1] as $s) {
		    $classes = explode(" ", $s);
		    foreach($classes as $class) {
		        array_push($clean_page_classes, $class);
		    }
		}
		foreach($page_ids[1] as $s) {
		    $ids = explode(" ", $s);
		    foreach($ids as $id) {
		        array_push($clean_page_ids, $id);
		    }
		}
 
		$not_used = array();
		foreach($css_classes[1] as $css){
		    if(!in_array($css, $clean_page_classes) && !in_array('.'.$css, $not_used)){
		        array_push($not_used, '.'.$css);
		    }
		}
		foreach($css_ids[1] as $css){
		    if(!in_array($css, $clean_page_ids) && !in_array('#'.$css, $not_used)){
		        array_push($not_used, '#'.$css);
		    }
		}
		return (count($not_used) > 0) ? $not_used : false;
	}
}
 
$scanner = new css_scanner($_GET['page']);
?>