爬取一个themeForest的模版

@version1.0
这个只能爬取静态的网站模版，代码逻辑需要优化。
正确的逻辑应该是从首页开始爬，
获取HTML,JS,IMAGE，CSS,然后从CSS中分析额外加载的CSS，最后分析所有的CSS中包含的图片引用。

 
<?php
class NetworkReptiles
{
    // 正则解析图片、JS、CSS、等资源文件
    protected $href_patten = "/<a href=[\\'\\"]?([^\\'\\" ]+).*?>/";
    protected $script_pattern = "/<script src=[\\'\\"]?([^\\'\\" ]+).*?>/";
    protected $image_pattern = "/<img src=[\\'\\"]?([^\\'\\" ]+).*?>/";
  
    protected $link_pattern = "/<link href=[\\'\\"]?([^\\'\\" ]+).*?>/";
  
    // 样式名称
    private $theme_name = null;
    // 样式的地址
    private $theme_base_url = null;
  
    // 本地样式存储地址
    private $themeDir = null;
    // 当前解析的html数据
    private $current_data = null;
  
    public function __construct($name=false, $url=false){
        $this->theme_name = ($name) ? $name : false;
        $this->theme_base_url = ($url) ? $url : false;
    }
  
    public function setTheme($opt)
    {
        $this->theme_name = $opt['name'];
        $this->theme_base_url = $opt['url'];
    }
  
    public function getTheme()
    {
        set_time_limit(0); 
        // 从首页开始爬                                       
        $this->themeDir = getcwd().'/theme/'.$this->theme_name."/";
        // 创建目录
        if (! file_exists($this->themeDir)) {
            @mkdir($this->themeDir, 0755);
        }
                      
        //$this->getStyleImages();
          
        // 获取首页
        $this->current_data = $this->getHtmlData("index.html");
        // 下载所有的HTML
        $this->getHtml();
  
        // 下载首页的资源文件
        $this->showMsg("index.html");
        $this->downloadResource();
  
        foreach ($this->_html_resource as $key => $html) {
            $this->showMsg($html);
            // 下载每一个html文件的资源
            unset($this->current_data);
            $this->current_data = $this->getHtmlData($html);
            $this->downloadResource();
        }       
    }
  
    private function showMsg($html)
    {
        echo "download resource $html\\n";
        echo str_repeat("-", 30)."\\n";
    }
  
    private function getHtmlData($file_name)
    {
        $data = false;
        $file_path = $this->themeDir.$file_name;
        if (file_exists($file_path)) {
            $data = file_get_contents($file_path);
        } else {
            $data = file_get_contents($this->theme_base_url.$file_name);
            file_put_contents($file_path, $data);           
        }
        return $data;
    }
  
    private function getHtml()
    {       
        preg_match_all($this->href_patten, $this->current_data, $href_match);         
        foreach ($href_match[1] as $key => $value) {
            if (preg_match("/^(.*)?\\.(html)$/", $value)) {
                array_push($this->_html_resource, $value);               
                $file_path = $this->themeDir.$value;
                if (! file_exists($file_path)) {                    
                    $this->downloadFile($value);                                 
                }               
            }
        }
    }
  
    private function downloadResource()
    {
        // 下载JS脚本
        preg_match_all($this->script_pattern, $this->current_data, $script_match);    
  
        foreach ($script_match[1] as $key => $value) {
            $this->createDirectory($value);
            $this->downloadFile($value);             
        }
  
        // 下载图片
        preg_match_all($this->image_pattern, $this->current_data, $image_match);  
  
        foreach ($image_match[1] as $key => $value) {
            $this->createDirectory($value);
            $this->downloadFile($value);         
        }
  
        // 下载CSS样式
        preg_match_all($this->link_pattern, $this->current_data, $link_match);    
  
        foreach ($link_match[1] as $key => $value) {
            $this->createDirectory($value);
            $this->downloadFile($value);         
        }
  
    }
  
    private function downloadFile($filename)
    {       
        $file_location = $this->themeDir.$filename;
        if (file_exists($this->themeDir.$filename))
        {
            echo "file already download $file_location\\n";
            return;
        }
  
        $curl = curl_init($this->theme_base_url.$filename);      
        curl_setopt($curl,CURLOPT_RETURNTRANSFER,1);
        $resourceData = curl_exec($curl);
        curl_close($curl);      
          
        $fh = fopen($file_location, 'a');
        if (is_resource($fh))
        {
            fwrite($fh, $resourceData);
            fclose($fh);
            echo "download file ".$file_location."\\n";
        }               
        echo "fail download file ".$file_location."\\n";
    }
  
    private function createDirectory($str)
    {   
        $str = substr($str, 0, strrpos($str, "/"));     
        $dir = explode("/", $str);
        $tmp_dir = $this->themeDir;
        foreach ($dir as $key => $value) {       
            $tmp_dir = $tmp_dir."/".$value;
            if (!file_exists($tmp_dir)) {
                @mkdir($tmp_dir, 0755);
            }       
        }       
    }
    /*@todo 下载css中额外加载的CSS文件*/
    private function getStyleImages()
    {
        $style_path = array(
            "css/style.default.css",
            "css/prettyPhoto.css",  
            'css/bootstrap.min.css',
            'css/bootstrap-override.css',
            'css/weather-icons.min.css',
            'css/jquery-ui-1.10.3.css',
            'css/font-awesome.min.css',
            'css/animate.min.css',
            'css/animate.delay.css',
            'css/toggles.css',
            'css/select2.css',
            'css/lato.css',
            'css/roboto.css'
            );
  
        foreach ($style_path as $value) {                       
            $data = $this->getHtmlData($value);
  
            preg_match_all("/url[\\(]?(.*)[\\)]/", $data, $match);
            foreach ($match[1] as $image) {
                $realImagePath = substr($image, 3);
  
                if (preg_match("/^(.*)?\\.(png)|(jpg)$/", $realImagePath))
                {
                    $this->createDirectory($realImagePath);
                    $this->downloadFile($realImagePath);
                }               
            }
            unset($data);
        }       
    }
  
}
  
//"bracket","http://themepixels.com/demo/webpage/bracket/"
  
$nr = new NetworkReptiles("bracket", "http://themepixels.com/demo/webpage/bracket/");
$nr->getTheme();