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<?php
/**
* @author Bart Visscher <bartv@thisnet.nl>
* @author Felix Moeller <mail@felixmoeller.de>
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Robin Appelman <icewind@owncloud.com>
* @author Robin McCorkell <rmccorkell@karoshi.org.uk>
* @author Scrutinizer Auto-Fixer <auto-fixer@scrutinizer-ci.com>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Vincent Petry <pvince81@owncloud.com>
*
* @copyright Copyright (c) 2015, ownCloud, Inc.
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
class OC_FileProxy{
private static $proxies=array();
public static $enabled=true;
/**
* fallback function when a proxy operation is not implemented
* @param string $function the name of the proxy operation
* @param mixed $arguments
*
* this implements a dummy proxy for all operations
*/
public function __call($function, $arguments) {
if(substr($function, 0, 3)=='pre') {
return true;
}else{
return $arguments[1];
}
}
/**
* register a proxy to be used
* @param OC_FileProxy $proxy
*/
public static function register($proxy) {
self::$proxies[]=$proxy;
}
/**
* @param string $operation
*/
public static function getProxies($operation = null) {
if ($operation === null) {
// return all
return self::$proxies;
}
$proxies=array();
foreach(self::$proxies as $proxy) {
if(method_exists($proxy, $operation)) {
$proxies[]=$proxy;
}
}
return $proxies;
}
/**
* @param string $operation
* @param string|boolean $filepath
*/
public static function runPreProxies($operation,&$filepath,&$filepath2=null) {
if(!self::$enabled) {
return true;
}
$operation='pre'.$operation;
$proxies=self::getProxies($operation);
foreach($proxies as $proxy) {
if(!is_null($filepath2)) {
if($proxy->$operation($filepath, $filepath2)===false) {
return false;
}
}else{
if($proxy->$operation($filepath)===false) {
return false;
}
}
}
return true;
}
/**
* @param string $operation
* @param string|boolean $path
*
* @return string
*/
public static function runPostProxies($operation, $path, $result) {
if(!self::$enabled) {
return $result;
}
$operation='post'.$operation;
$proxies=self::getProxies($operation);
foreach($proxies as $proxy) {
$result=$proxy->$operation($path, $result);
}
return $result;
}
public static function clearProxies() {
self::$proxies=array();
}
}
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