nextcloud/apps/files_versions/lib/versions.php

312 lines
9.0 KiB
PHP
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

<?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 $view;
function __construct() {
$this->view = \OCP\Files::getStorage('files_versions');
}
/**
* listen to write event.
*/
public static function write_hook($params) {
if(\OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true') {
$path = $params[\OC_Filesystem::signal_param_path];
if($path<>'') $this->store($path);
}
}
/**
* store a new version of a file.
*/
public function store($filename) {
if(\OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true') {
$files_view = \OCP\Files::getStorage("files");
$users_view = \OCP\Files::getStorage("files_versions");
$users_view->chroot(\OCP\User::getUser().'/');
//FIXME OC_Share no longer exists
//if (\OCP\App::isEnabled('files_sharing') && $source = \OC_Share::getSource('/'.\OCP\User::getUser().'/files'.$filename)) {
// $pos = strpos($source, '/files', 1);
// $uid = substr($source, 1, $pos - 1);
// $filename = substr($source, $pos + 6);
//} else {
$uid = \OCP\User::getUser();
//}
$versionsFolderName=\OCP\Config::getSystemValue('datadirectory') . $this->view->getAbsolutePath('');
//check if source file already exist as version to avoid recursions.
if ($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;
}
}
// 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()) {
$matches=glob($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'],0700,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') {
$users_view = \OCP\Files::getStorage("files_versions");
$users_view->chroot(\OCP\User::getUser().'/');
//FIXME OC_Share no longer exists
//if (\OCP\App::isEnabled('files_sharing') && $source = \OC_Share::getSource('/'.\OCP\User::getUser().'/files'.$filename)) {
// $pos = strpos($source, '/files', 1);
// $uid = substr($source, 1, $pos - 1);
// $filename = substr($source, $pos + 6);
//} else {
$uid = \OCP\User::getUser();
//}
// rollback
if( @$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') {
$versions_fileview = \OCP\Files::getStorage("files_versions");
//FIXME OC_Share no longer exists
//if (\OCP\App::isEnabled('files_sharing') && $source = \OC_Share::getSource('/'.\OCP\User::getUser().'/files'.$filename)) {
// $pos = strpos($source, '/files', 1);
// $filename = substr($source, $pos + 6);
//}
$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' ) {
//FIXME OC_Share no longer exists
//if (\OCP\App::isEnabled('files_sharing') && $source = \OC_Share::getSource('/'.\OCP\User::getUser().'/files'.$filename)) {
// $pos = strpos($source, '/files', 1);
// $uid = substr($source, 1, $pos - 1);
// $filename = substr($source, $pos + 6);
//} else {
$uid = \OCP\User::getUser();
//}
$versions_fileview = \OCP\Files::getStorage('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 = \OCP\Files::getStorage('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') {
//FIXME OC_Share no longer exists
//if (\OCP\App::isEnabled('files_sharing') && $source = \OC_Share::getSource('/'.\OCP\User::getUser().'/files'.$filename)) {
// $pos = strpos($source, '/files', 1);
// $uid = substr($source, 1, $pos - 1);
// $filename = substr($source, $pos + 6);
//} else {
$uid = \OCP\User::getUser();
//}
$versions_fileview = \OCP\Files::getStorage("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() {
return $this->view->deleteAll('', true);
}
}