<?php



namespace FW\IO;



class Dir extends FileSystemItem implements \Iterator {

	private $data;

	private $dir = 0;

	private $no = 0;



	function __destruct() {

	    if ($this->dir) $this->dir->close();

	}



	function create($mode = 0755, $user = '') {

		if ($this->exists) 

			chmod($this->name, $mode);

		else

			mkdir($this->name, $mode, true);

		if ($user) chown($this->name, $user);

	}



	function createChild($name) {

		$d = new Dir($this->name.'/'.$name);

		$d->create();

		return $d;

	}





	function delete() {

		if (!$this->exists) throw new \Exception("Directory $this->name not exists!");

		foreach($this as $item) {

			if (is_link($item->name)) unlink($item->name);

			else $item->delete();

		}

		\rmdir($this->name);

	}

	

	function deleteFiles($mask, $recursive = false) {

		if (!$this->exists) throw new \Exception("Directory $this->name not exists!");

		foreach($this as $item) { 

			if (preg_match($mask, $item->basename)) $item->delete();

			elseif ($recursive && $item instanceof Dir) $item->deleteFiles($mask, true);

		}

	}

	

	public function key() { return $this->no; }

	public function valid() { 

	    do {

			$this->data = $this->dir->read();

	    } while ($this->data && ($this->data == '.' || $this->data == '..'));

		

	    return false !== ($this->data);

	}

	public function rewind() { 

		$this->no = 0;

		if(file_exists($this->name)) {

			if (!$this->dir)  

				$this->dir = \dir($this->name);  

			else 

				$this->dir->rewind(); 

		}

	}

	public function next() { 

	    $this->no++; 

	}

	

	public function current() { 

		$name = "$this->name/$this->data";

		if (is_dir($name)) return new Dir($name);

		return new File($name);

	}



	function copyTo($target) {

		$d = new Dir($target);

		if (!$d->exists) $d->create();

		$stack = array(array($this, $d));

		while ($stack) {

			list($dir, $target) = array_pop($stack);

			foreach ($dir as $item) {

				if (\is_link($item->name)) {

					$source = \readlink($item->name);

				   \symlink($source, $target->name."/".$item->basename);

				}

				elseif ($item instanceof Dir) {

					\array_push ($stack, array($item, $target->createChild($item->basename)));

				}

				else {

					$item->copyTo($target->name."/".$item->basename);

				}

			}

		}

	}

}