263 lines
8.2 KiB
PHP
263 lines
8.2 KiB
PHP
<?php
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/**
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* Copyright (c) 2012 Frank Karlitschek <frank@owncloud.org>
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* This file is licensed under the Affero General Public License version 3 or
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* later.
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* See the COPYING-README file.
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*/
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/**
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* Versions
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*
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* A class to handle the versioning of files.
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*/
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namespace OCA_Versions;
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class Storage {
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// config.php configuration:
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// - files_versions
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// - files_versionsfolder
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// - files_versionsblacklist
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// - files_versionsmaxfilesize
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// - files_versionsinterval
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// - files_versionmaxversions
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//
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// todo:
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// - port to oc_filesystem to enable network transparency
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// - check if it works well together with encryption
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// - implement expire all function. And find a place to call it ;-)
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// - add transparent compression. first test if it´s worth it.
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const DEFAULTENABLED=true;
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const DEFAULTFOLDER='versions';
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const DEFAULTBLACKLIST='avi mp3 mpg mp4 ctmp';
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const DEFAULTMAXFILESIZE=1048576; // 10MB
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const DEFAULTMININTERVAL=120; // 2 min
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const DEFAULTMAXVERSIONS=50;
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/**
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* init the versioning and create the versions folder.
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*/
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public static function init() {
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if(\OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true') {
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// create versions folder
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$foldername=\OCP\Config::getSystemValue('datadirectory').'/'. \OCP\USER::getUser() .'/'.\OCP\Config::getSystemValue('files_versionsfolder', Storage::DEFAULTFOLDER);
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if(!is_dir($foldername)){
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mkdir($foldername);
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}
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}
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}
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/**
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* listen to write event.
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*/
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public static function write_hook($params) {
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if(\OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true') {
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$path = $params[\OC_Filesystem::signal_param_path];
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if($path<>'') Storage::store($path);
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}
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}
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/**
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* store a new version of a file.
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*/
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public static function store($filename) {
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if(\OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true') {
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if (\OCP\App::isEnabled('files_sharing') && $source = \OC_Share::getSource('/'.\OCP\User::getUser().'/files'.$filename)) {
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$pos = strpos($source, '/files', 1);
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$uid = substr($source, 1, $pos - 1);
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$filename = substr($source, $pos + 6);
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} else {
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$uid = \OCP\User::getUser();
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}
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$versionsfoldername=\OCP\Config::getSystemValue('datadirectory').'/'. $uid .'/'.\OCP\Config::getSystemValue('files_versionsfolder', Storage::DEFAULTFOLDER);
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$filesfoldername=\OCP\Config::getSystemValue('datadirectory').'/'. $uid .'/files';
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Storage::init();
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// check if filename is a directory
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if(is_dir($filesfoldername.'/'.$filename)){
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return false;
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}
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// check filetype blacklist
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$blacklist=explode(' ',\OCP\Config::getSystemValue('files_versionsblacklist', Storage::DEFAULTBLACKLIST));
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foreach($blacklist as $bl) {
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$parts=explode('.', $filename);
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$ext=end($parts);
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if(strtolower($ext)==$bl) {
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return false;
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}
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}
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// check filesize
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if(filesize($filesfoldername.'/'.$filename)>\OCP\Config::getSystemValue('files_versionsmaxfilesize', Storage::DEFAULTMAXFILESIZE)){
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return false;
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}
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// check mininterval if the file is being modified by the owner (all shared files should be versioned despite mininterval)
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if ($uid == \OCP\User::getUser()) {
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$matches=glob($versionsfoldername.'/'.$filename.'.v*');
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sort($matches);
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$parts=explode('.v',end($matches));
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if((end($parts)+Storage::DEFAULTMININTERVAL)>time()){
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return false;
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}
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}
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// create all parent folders
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$info=pathinfo($filename);
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@mkdir($versionsfoldername.'/'.$info['dirname'],0700,true);
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// store a new version of a file
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copy($filesfoldername.'/'.$filename,$versionsfoldername.'/'.$filename.'.v'.time());
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// expire old revisions
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Storage::expire($filename);
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}
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}
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/**
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* rollback to an old version of a file.
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*/
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public static function rollback($filename,$revision) {
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if(\OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true') {
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if (\OCP\App::isEnabled('files_sharing') && $source = \OC_Share::getSource('/'.\OCP\User::getUser().'/files'.$filename)) {
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$pos = strpos($source, '/files', 1);
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$uid = substr($source, 1, $pos - 1);
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$filename = substr($source, $pos + 6);
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} else {
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$uid = \OCP\User::getUser();
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}
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$versionsfoldername=\OCP\Config::getSystemValue('datadirectory').'/'.$uid .'/'.\OCP\Config::getSystemValue('files_versionsfolder', Storage::DEFAULTFOLDER);
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$filesfoldername=\OCP\Config::getSystemValue('datadirectory').'/'. $uid .'/files';
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// rollback
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if ( @copy($versionsfoldername.'/'.$filename.'.v'.$revision,$filesfoldername.'/'.$filename) ) {
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return true;
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}else{
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return false;
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}
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}
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}
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/**
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* check if old versions of a file exist.
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*/
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public static function isversioned($filename) {
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if(\OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true') {
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if (\OCP\App::isEnabled('files_sharing') && $source = \OC_Share::getSource('/'.\OCP\User::getUser().'/files'.$filename)) {
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$pos = strpos($source, '/files', 1);
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$uid = substr($source, 1, $pos - 1);
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$filename = substr($source, $pos + 6);
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} else {
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$uid = \OCP\User::getUser();
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}
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$versionsfoldername=\OCP\Config::getSystemValue('datadirectory').'/'. $uid .'/'.\OCP\Config::getSystemValue('files_versionsfolder', Storage::DEFAULTFOLDER);
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// check for old versions
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$matches=glob($versionsfoldername.'/'.$filename.'.v*');
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if(count($matches)>1){
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return true;
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}else{
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return false;
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}
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}else{
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return(false);
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}
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}
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/**
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* get a list of old versions of a file.
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*/
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public static function getversions($filename,$count=0) {
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if(\OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true') {
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if (\OCP\App::isEnabled('files_sharing') && $source = \OC_Share::getSource('/'.\OCP\User::getUser().'/files'.$filename)) {
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$pos = strpos($source, '/files', 1);
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$uid = substr($source, 1, $pos - 1);
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$filename = substr($source, $pos + 6);
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} else {
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$uid = \OCP\User::getUser();
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}
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$versionsfoldername=\OCP\Config::getSystemValue('datadirectory').'/'. $uid .'/'.\OCP\Config::getSystemValue('files_versionsfolder', Storage::DEFAULTFOLDER);
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$versions=array();
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// fetch for old versions
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$matches=glob($versionsfoldername.'/'.$filename.'.v*');
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sort($matches);
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foreach($matches as $ma) {
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$parts=explode('.v',$ma);
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$versions[]=(end($parts));
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}
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// only show the newest commits
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if($count<>0 and (count($versions)>$count)) {
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$versions=array_slice($versions,count($versions)-$count);
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}
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return($versions);
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}else{
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return(array());
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}
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}
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/**
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* expire old versions of a file.
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*/
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public static function expire($filename) {
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if(\OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true') {
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if (\OCP\App::isEnabled('files_sharing') && $source = \OC_Share::getSource('/'.\OCP\User::getUser().'/files'.$filename)) {
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$pos = strpos($source, '/files', 1);
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$uid = substr($source, 1, $pos - 1);
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$filename = substr($source, $pos + 6);
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} else {
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$uid = \OCP\User::getUser();
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}
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$versionsfoldername=\OCP\Config::getSystemValue('datadirectory').'/'. $uid .'/'.\OCP\Config::getSystemValue('files_versionsfolder', Storage::DEFAULTFOLDER);
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// check for old versions
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$matches=glob($versionsfoldername.'/'.$filename.'.v*');
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if(count($matches)>\OCP\Config::getSystemValue('files_versionmaxversions', Storage::DEFAULTMAXVERSIONS)){
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$numbertodelete=count($matches-\OCP\Config::getSystemValue('files_versionmaxversions', Storage::DEFAULTMAXVERSIONS));
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// delete old versions of a file
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$deleteitems=array_slice($matches,0,$numbertodelete);
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foreach($deleteitems as $de){
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unlink($versionsfoldername.'/'.$filename.'.v'.$de);
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}
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}
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}
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}
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/**
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* expire all old versions.
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*/
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public static function expireall($filename) {
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// todo this should go through all the versions directories and delete all the not needed files and not needed directories.
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// useful to be included in a cleanup cronjob.
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}
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}
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