<?php
/**
 * Copyright (c) 2012 Robin Appelman <icewind@owncloud.com>
 * This file is licensed under the Affero General Public License version 3 or
 * later.
 * See the COPYING-README file.
 */

namespace OC\Files\Storage;

/**
 * for local filestore, we only have to map the paths
 */
class Local extends \OC\Files\Storage\Common{
	protected $datadir;
	public function __construct($arguments) {
		$this->datadir=$arguments['datadir'];
		if(substr($this->datadir,-1)!=='/') {
			$this->datadir.='/';
		}
	}
	public function getId(){
		return 'local::'.$this->datadir;
	}
	public function mkdir($path) {
		return @mkdir($this->datadir.$path);
	}
	public function rmdir($path) {
		return @rmdir($this->datadir.$path);
	}
	public function opendir($path) {
		return opendir($this->datadir.$path);
	}
	public function is_dir($path) {
		if(substr($path,-1)=='/') {
			$path=substr($path,0,-1);
		}
		return is_dir($this->datadir.$path);
	}
	public function is_file($path) {
		return is_file($this->datadir.$path);
	}
	public function stat($path) {
		return stat($this->datadir.$path);
	}
	public function filetype($path) {
		$filetype=filetype($this->datadir.$path);
		if($filetype=='link') {
			$filetype=filetype(realpath($this->datadir.$path));
		}
		return $filetype;
	}
	public function filesize($path) {
		if($this->is_dir($path)) {
			return 0;
		}else{
			return filesize($this->datadir.$path);
		}
	}
	public function isReadable($path) {
		return is_readable($this->datadir.$path);
	}
	public function isUpdatable($path) {
		return is_writable($this->datadir.$path);
	}
	public function file_exists($path) {
		return file_exists($this->datadir.$path);
	}
	public function filectime($path) {
		return filectime($this->datadir.$path);
	}
	public function filemtime($path) {
		return filemtime($this->datadir.$path);
	}
	public function touch($path, $mtime=null) {
		// sets the modification time of the file to the given value.
		// If mtime is nil the current time is set.
		// note that the access time of the file always changes to the current time.
		if(!is_null($mtime)) {
			$result=touch( $this->datadir.$path, $mtime );
		}else{
			$result=touch( $this->datadir.$path);
		}
		if( $result ) {
			clearstatcache( true, $this->datadir.$path );
		}

		return $result;
	}
	public function file_get_contents($path) {
		return file_get_contents($this->datadir.$path);
	}
	public function file_put_contents($path,$data) {
		return file_put_contents($this->datadir.$path,$data);
	}
	public function unlink($path) {
		return $this->delTree($path);
	}
	public function rename($path1,$path2) {
		if (!$this->isUpdatable($path1)) {
			\OC_Log::write('core','unable to rename, file is not writable : '.$path1,\OC_Log::ERROR);
			return false;
		}
		if(! $this->file_exists($path1)) {
			\OC_Log::write('core','unable to rename, file does not exists : '.$path1,\OC_Log::ERROR);
			return false;
		}

		if($return=rename($this->datadir.$path1,$this->datadir.$path2)) {
		}
		return $return;
	}
	public function copy($path1,$path2) {
		if($this->is_dir($path2)) {
			if(!$this->file_exists($path2)) {
				$this->mkdir($path2);
			}
			$source=substr($path1,strrpos($path1,'/')+1);
			$path2.=$source;
		}
		return copy($this->datadir.$path1,$this->datadir.$path2);
	}
	public function fopen($path,$mode) {
		if($return=fopen($this->datadir.$path,$mode)) {
			switch($mode) {
				case 'r':
					break;
				case 'r+':
				case 'w+':
				case 'x+':
				case 'a+':
					break;
				case 'w':
				case 'x':
				case 'a':
					break;
			}
		}
		return $return;
	}

	public function getMimeType($path) {
		if($this->isReadable($path)) {
			return \OC_Helper::getMimeType($this->datadir.$path);
		}else{
			return false;
		}
	}

	private function delTree($dir) {
		$dirRelative=$dir;
		$dir=$this->datadir.$dir;
		if (!file_exists($dir)) return true;
		if (!is_dir($dir) || is_link($dir)) return unlink($dir);
		foreach (scandir($dir) as $item) {
			if ($item == '.' || $item == '..') continue;
			if(is_file($dir.'/'.$item)) {
				if(unlink($dir.'/'.$item)) {
				}
			}elseif(is_dir($dir.'/'.$item)) {
				if (!$this->delTree($dirRelative. "/" . $item)) {
					return false;
				};
			}
		}
		if($return=rmdir($dir)) {
		}
		return $return;
	}

	public function hash($path,$type,$raw=false) {
		return hash_file($type,$this->datadir.$path,$raw);
	}

	public function free_space($path) {
		return @disk_free_space($this->datadir.$path);
	}

	public function search($query) {
		return $this->searchInDir($query);
	}
	public function getLocalFile($path) {
		return $this->datadir.$path;
	}
	public function getLocalFolder($path) {
		return $this->datadir.$path;
	}

	protected function searchInDir($query,$dir='') {
		$files=array();
		foreach (scandir($this->datadir.$dir) as $item) {
			if ($item == '.' || $item == '..') continue;
			if(strstr(strtolower($item),strtolower($query))!==false) {
				$files[]=$dir.'/'.$item;
			}
			if(is_dir($this->datadir.$dir.'/'.$item)) {
				$files=array_merge($files,$this->searchInDir($query,$dir.'/'.$item));
			}
		}
		return $files;
	}

	/**
	 * check if a file or folder has been updated since $time
	 * @param int $time
	 * @return bool
	 */
	public function hasUpdated($path,$time) {
		return $this->filemtime($path)>$time;
	}
}