<?
/*
- author: Skakunov Alexander [hide@address.com]
- filename: FileSystemManager.class.php
- date: 28.05.2007
- description: FileSystemManager allows to work with folders at the disk
*/

class FileSystemManager
{
  public $folder_src;
  public $folder_dst;
  public $compare_mtime = true;
  public $verbose = false;
  public $verbose_separator="<br/>";
  
  public function FileSystemManager($folder_src, $folder_dst="")
  {
    $this->folder_src = $folder_src;
    $this->folder_dst = $folder_dst;
  }

  public function flush_folder($folder)
  {
    if(!is_dir($folder)) 
      if(!mkdir($folder))
        throw new Exception('Cannot create folder :['.$folder.']');

    return true;
  }
  
  public function copy_folder($srcdir="", $dstdir="")
  {
    if(empty($srcdir))
      $srcdir = $this->folder_src;
    if(empty($dstdir))
      $dstdir = $this->folder_dst;
    if(empty($dstdir))
      return false;
    $num = 0;
    clearstatcache();
    try
    {
      $this->flush_folder($dstdir);
    }
    catch(Exception $e)
    {
      return false;
    }
    if($curdir = opendir($srcdir)) 
    {
      while($file = readdir($curdir)) 
      {
        if($file != '.' && $file != '..') 
        {
          $srcfile = $srcdir . DIRECTORY_SEPARATOR . $file;
          $dstfile = $dstdir . DIRECTORY_SEPARATOR . $file;
          if(is_file($srcfile)) 
          {
            if($compare_mtime)
            {
              if(is_file($dstfile)) 
              {
                $ow = filemtime($srcfile) - filemtime($dstfile); 
              }
              else 
              {
                $ow = 1;
              }
            }
            if(!$compare_mtime || $ow > 0) //true if 1) don't compare mtime, 2) compare mtime AND $ow > 0
            {
              $this->verbose("Copying '".htmlspecialchars($srcfile)."' to '".htmlspecialchars($dstfile)."'...");
              if(copy($srcfile, $dstfile)) 
              {
                touch($dstfile, filemtime($srcfile)); 
                $num++;
                $this->verbose("OK");
              }
              else
              {
                $this->verbose("Error: File '".htmlspecialchars($srcfile)."' could not be copied!");
              }
            }                  
          }
          else if(is_dir($srcfile)) 
          {
            $num += $this->copy_folder($srcfile, $dstfile);
          }
        }
      }
      closedir($curdir);
    }
    return $num;
  }
  
  protected function verbose($message)
  {
    if($this->verbose) 
      echo $message . $this->verbose_separator;
  }
}
?>