280 lines
7.6 KiB
PHP
280 lines
7.6 KiB
PHP
<?php
|
||
/**
|
||
* Copyright (c) 2012 Frank Karlitschek <frank@owncloud.org>
|
||
* This file is licensed under the Affero General Public License version 3 or
|
||
* later.
|
||
* See the COPYING-README file.
|
||
*/
|
||
|
||
/**
|
||
* Versions
|
||
*
|
||
* A class to handle the versioning of files.
|
||
*/
|
||
|
||
namespace OCA_Versions;
|
||
|
||
class Storage {
|
||
|
||
|
||
// config.php configuration:
|
||
// - files_versions
|
||
// - files_versionsfolder
|
||
// - files_versionsblacklist
|
||
// - files_versionsmaxfilesize
|
||
// - files_versionsinterval
|
||
// - files_versionmaxversions
|
||
//
|
||
// todo:
|
||
// - finish porting to OC_FilesystemView to enable network transparency
|
||
// - add transparent compression. first test if it´s worth it.
|
||
|
||
const DEFAULTENABLED=true;
|
||
const DEFAULTBLACKLIST='avi mp3 mpg mp4 ctmp';
|
||
const DEFAULTMAXFILESIZE=1048576; // 10MB
|
||
const DEFAULTMININTERVAL=60; // 1 min
|
||
const DEFAULTMAXVERSIONS=50;
|
||
|
||
private static function getUidAndFilename($filename)
|
||
{
|
||
if (\OCP\App::isEnabled('files_sharing')
|
||
&& substr($filename, 0, 7) == '/Shared'
|
||
&& $source = \OCP\Share::getItemSharedWith('file',
|
||
substr($filename, 7),
|
||
\OC_Share_Backend_File::FORMAT_SHARED_STORAGE)) {
|
||
$filename = $source['path'];
|
||
$pos = strpos($filename, '/files', 1);
|
||
$uid = substr($filename, 1, $pos - 1);
|
||
$filename = substr($filename, $pos + 6);
|
||
} else {
|
||
$uid = \OCP\User::getUser();
|
||
}
|
||
return array($uid, $filename);
|
||
}
|
||
|
||
/**
|
||
* store a new version of a file.
|
||
*/
|
||
public function store($filename) {
|
||
if(\OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true') {
|
||
list($uid, $filename) = self::getUidAndFilename($filename);
|
||
$files_view = new \OC_FilesystemView('/'.$uid.'/files');
|
||
$users_view = new \OC_FilesystemView('/'.$uid);
|
||
|
||
//check if source file already exist as version to avoid recursions.
|
||
// todo does this check work?
|
||
if ($users_view->file_exists($filename)) {
|
||
return false;
|
||
}
|
||
|
||
// check if filename is a directory
|
||
if($files_view->is_dir($filename)) {
|
||
return false;
|
||
}
|
||
|
||
// check filetype blacklist
|
||
$blacklist=explode(' ',\OCP\Config::getSystemValue('files_versionsblacklist', Storage::DEFAULTBLACKLIST));
|
||
foreach($blacklist as $bl) {
|
||
$parts=explode('.', $filename);
|
||
$ext=end($parts);
|
||
if(strtolower($ext)==$bl) {
|
||
return false;
|
||
}
|
||
}
|
||
// we should have a source file to work with
|
||
if (!$files_view->file_exists($filename)) {
|
||
return false;
|
||
}
|
||
|
||
// check filesize
|
||
if($files_view->filesize($filename)>\OCP\Config::getSystemValue('files_versionsmaxfilesize', Storage::DEFAULTMAXFILESIZE)) {
|
||
return false;
|
||
}
|
||
|
||
|
||
// check mininterval if the file is being modified by the owner (all shared files should be versioned despite mininterval)
|
||
if ($uid == \OCP\User::getUser()) {
|
||
$versions_fileview = new \OC_FilesystemView('/'.$uid.'/files_versions');
|
||
$versionsFolderName=\OCP\Config::getSystemValue('datadirectory'). $versions_fileview->getAbsolutePath('');
|
||
$matches=glob($versionsFolderName.'/'.$filename.'.v*');
|
||
sort($matches);
|
||
$parts=explode('.v',end($matches));
|
||
if((end($parts)+Storage::DEFAULTMININTERVAL)>time()) {
|
||
return false;
|
||
}
|
||
}
|
||
|
||
|
||
// create all parent folders
|
||
$info=pathinfo($filename);
|
||
if(!file_exists($versionsFolderName.'/'.$info['dirname'])) {
|
||
mkdir($versionsFolderName.'/'.$info['dirname'],0750,true);
|
||
}
|
||
|
||
// store a new version of a file
|
||
$users_view->copy('files'.$filename, 'files_versions'.$filename.'.v'.time());
|
||
|
||
// expire old revisions if necessary
|
||
Storage::expire($filename);
|
||
}
|
||
}
|
||
|
||
|
||
/**
|
||
* rollback to an old version of a file.
|
||
*/
|
||
public static function rollback($filename,$revision) {
|
||
|
||
if(\OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true') {
|
||
list($uid, $filename) = self::getUidAndFilename($filename);
|
||
$users_view = new \OC_FilesystemView('/'.$uid);
|
||
|
||
// rollback
|
||
if( @$users_view->copy('files_versions'.$filename.'.v'.$revision, 'files'.$filename) ) {
|
||
|
||
return true;
|
||
|
||
}else{
|
||
|
||
return false;
|
||
|
||
}
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* check if old versions of a file exist.
|
||
*/
|
||
public static function isversioned($filename) {
|
||
if(\OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true') {
|
||
list($uid, $filename) = self::getUidAndFilename($filename);
|
||
$versions_fileview = new \OC_FilesystemView('/'.$uid.'/files_versions');
|
||
|
||
$versionsFolderName=\OCP\Config::getSystemValue('datadirectory'). $versions_fileview->getAbsolutePath('');
|
||
|
||
// check for old versions
|
||
$matches=glob($versionsFolderName.$filename.'.v*');
|
||
if(count($matches)>0) {
|
||
return true;
|
||
}else{
|
||
return false;
|
||
}
|
||
}else{
|
||
return(false);
|
||
}
|
||
}
|
||
|
||
|
||
|
||
/**
|
||
* @brief get a list of all available versions of a file in descending chronological order
|
||
* @param $filename file to find versions of, relative to the user files dir
|
||
* @param $count number of versions to return
|
||
* @returns array
|
||
*/
|
||
public static function getVersions( $filename, $count = 0 ) {
|
||
|
||
if( \OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true' ) {
|
||
list($uid, $filename) = self::getUidAndFilename($filename);
|
||
$versions_fileview = new \OC_FilesystemView('/'.$uid.'/files_versions');
|
||
|
||
$versionsFolderName = \OCP\Config::getSystemValue('datadirectory'). $versions_fileview->getAbsolutePath('');
|
||
$versions = array();
|
||
|
||
// fetch for old versions
|
||
$matches = glob( $versionsFolderName.'/'.$filename.'.v*' );
|
||
|
||
sort( $matches );
|
||
|
||
$i = 0;
|
||
|
||
$files_view = new \OC_FilesystemView('/'.$uid.'/files');
|
||
$local_file = $files_view->getLocalFile($filename);
|
||
foreach( $matches as $ma ) {
|
||
|
||
$i++;
|
||
$versions[$i]['cur'] = 0;
|
||
$parts = explode( '.v', $ma );
|
||
$versions[$i]['version'] = ( end( $parts ) );
|
||
|
||
// if file with modified date exists, flag it in array as currently enabled version
|
||
( \md5_file( $ma ) == \md5_file( $local_file ) ? $versions[$i]['fileMatch'] = 1 : $versions[$i]['fileMatch'] = 0 );
|
||
|
||
}
|
||
|
||
$versions = array_reverse( $versions );
|
||
|
||
foreach( $versions as $key => $value ) {
|
||
|
||
// flag the first matched file in array (which will have latest modification date) as current version
|
||
if ( $value['fileMatch'] ) {
|
||
|
||
$value['cur'] = 1;
|
||
break;
|
||
|
||
}
|
||
|
||
}
|
||
|
||
$versions = array_reverse( $versions );
|
||
|
||
// only show the newest commits
|
||
if( $count != 0 and ( count( $versions )>$count ) ) {
|
||
|
||
$versions = array_slice( $versions, count( $versions ) - $count );
|
||
|
||
}
|
||
|
||
return( $versions );
|
||
|
||
|
||
} else {
|
||
|
||
// if versioning isn't enabled then return an empty array
|
||
return( array() );
|
||
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* @brief Erase a file's versions which exceed the set quota
|
||
*/
|
||
public static function expire($filename) {
|
||
if(\OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true') {
|
||
list($uid, $filename) = self::getUidAndFilename($filename);
|
||
$versions_fileview = new \OC_FilesystemView('/'.$uid.'/files_versions');
|
||
|
||
$versionsFolderName=\OCP\Config::getSystemValue('datadirectory'). $versions_fileview->getAbsolutePath('');
|
||
|
||
// check for old versions
|
||
$matches = glob( $versionsFolderName.'/'.$filename.'.v*' );
|
||
|
||
if( count( $matches ) > \OCP\Config::getSystemValue( 'files_versionmaxversions', Storage::DEFAULTMAXVERSIONS ) ) {
|
||
|
||
$numberToDelete = count($matches) - \OCP\Config::getSystemValue( 'files_versionmaxversions', Storage::DEFAULTMAXVERSIONS );
|
||
|
||
// delete old versions of a file
|
||
$deleteItems = array_slice( $matches, 0, $numberToDelete );
|
||
|
||
foreach( $deleteItems as $de ) {
|
||
|
||
unlink( $versionsFolderName.'/'.$filename.'.v'.$de );
|
||
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* @brief Erase all old versions of all user files
|
||
* @return true/false
|
||
*/
|
||
public function expireAll() {
|
||
$view = \OCP\Files::getStorage('files_versions');
|
||
return $view->deleteAll('', true);
|
||
}
|
||
}
|