nextcloud/apps/files_versions/lib/versions.php

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<?php
/**
* Copyright (c) 2012 Frank Karlitschek <frank@owncloud.org>
* 2013 Bjoern Schiessle <schiessle@owncloud.com>
* 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\Files_Versions;
class Storage {
const DEFAULTENABLED=true;
const DEFAULTMAXSIZE=50; // unit: percentage; 50% of available disk space/quota
const VERSIONS_ROOT = 'files_versions/';
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// files for which we can remove the versions after the delete operation was successful
private static $deletedFiles = array();
private static $max_versions_per_interval = array(
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//first 10sec, one version every 2sec
1 => array('intervalEndsAfter' => 10, 'step' => 2),
//next minute, one version every 10sec
2 => array('intervalEndsAfter' => 60, 'step' => 10),
//next hour, one version every minute
3 => array('intervalEndsAfter' => 3600, 'step' => 60),
//next 24h, one version every hour
4 => array('intervalEndsAfter' => 86400, 'step' => 3600),
//next 30days, one version per day
5 => array('intervalEndsAfter' => 2592000, 'step' => 86400),
//until the end one version per week
6 => array('intervalEndsAfter' => -1, 'step' => 604800),
);
public static function getUidAndFilename($filename) {
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$uid = \OC\Files\Filesystem::getOwner($filename);
\OC\Files\Filesystem::initMountPoints($uid);
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if ( $uid != \OCP\User::getUser() ) {
$info = \OC\Files\Filesystem::getFileInfo($filename);
$ownerView = new \OC\Files\View('/'.$uid.'/files');
$filename = $ownerView->getPath($info['fileid']);
}
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return array($uid, $filename);
}
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/**
* get current size of all versions from a given user
*
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* @param $user user who owns the versions
* @return mixed versions size or false if no versions size is stored
*/
private static function getVersionsSize($user) {
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$query = \OC_DB::prepare('SELECT `size` FROM `*PREFIX*files_versions` WHERE `user`=?');
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$result = $query->execute(array($user))->fetchAll();
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if ($result) {
return $result[0]['size'];
}
return false;
}
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/**
* write to the database how much space is in use for versions
*
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* @param $user owner of the versions
* @param $size size of the versions
*/
private static function setVersionsSize($user, $size) {
if ( self::getVersionsSize($user) === false) {
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$query = \OC_DB::prepare('INSERT INTO `*PREFIX*files_versions` (`size`, `user`) VALUES (?, ?)');
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}else {
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$query = \OC_DB::prepare('UPDATE `*PREFIX*files_versions` SET `size`=? WHERE `user`=?');
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}
$query->execute(array($size, $user));
}
/**
* store a new version of a file.
*/
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public static function store($filename) {
if(\OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true') {
// if the file gets streamed we need to remove the .part extension
// to get the right target
$ext = pathinfo($filename, PATHINFO_EXTENSION);
if ($ext === 'part') {
$filename = substr($filename, 0, strlen($filename)-5);
}
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list($uid, $filename) = self::getUidAndFilename($filename);
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$files_view = new \OC\Files\View('/'.$uid .'/files');
$users_view = new \OC\Files\View('/'.$uid);
// check if filename is a directory
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if($files_view->is_dir($filename)) {
return false;
}
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// we should have a source file to work with, and the file shouldn't
// be empty
$fileExists = $files_view->file_exists($filename);
if (!($fileExists && $files_view->filesize($filename) > 0)) {
return false;
}
// create all parent folders
self::createMissingDirectories($filename, $users_view);
$versionsSize = self::getVersionsSize($uid);
if ( $versionsSize === false || $versionsSize < 0 ) {
$versionsSize = self::calculateSize($uid);
}
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// assumption: we need filesize($filename) for the new version +
// some more free space for the modified file which might be
// 1.5 times as large as the current version -> 2.5
$neededSpace = $files_view->filesize($filename) * 2.5;
$versionsSize = self::expire($filename, $versionsSize, $neededSpace);
// disable proxy to prevent multiple fopen calls
$proxyStatus = \OC_FileProxy::$enabled;
\OC_FileProxy::$enabled = false;
// store a new version of a file
$mtime = $users_view->filemtime('files'.$filename);
$users_view->copy('files'.$filename, 'files_versions'.$filename.'.v'. $mtime);
// call getFileInfo to enforce a file cache entry for the new version
$users_view->getFileInfo('files_versions'.$filename.'.v'.$mtime);
// reset proxy state
\OC_FileProxy::$enabled = $proxyStatus;
$versionsSize += $users_view->filesize('files'.$filename);
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self::setVersionsSize($uid, $versionsSize);
}
}
/**
* @brief mark file as deleted so that we can remove the versions if the file is gone
* @param string $path
*/
public static function markDeletedFile($path) {
list($uid, $filename) = self::getUidAndFilename($path);
self::$deletedFiles[$path] = array(
'uid' => $uid,
'filename' => $filename);
}
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/**
* Delete versions of a file
*/
public static function delete($path) {
$deletedFile = self::$deletedFiles[$path];
$uid = $deletedFile['uid'];
$filename = $deletedFile['filename'];
if (!\OC\Files\Filesystem::file_exists($path)) {
$versions_fileview = new \OC\Files\View('/' . $uid . '/files_versions');
$abs_path = $versions_fileview->getLocalFile($filename . '.v');
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$versions = self::getVersions($uid, $filename);
if (!empty($versions)) {
$versionsSize = self::getVersionsSize($uid);
if ($versionsSize === false || $versionsSize < 0) {
$versionsSize = self::calculateSize($uid);
}
foreach ($versions as $v) {
\OC_Hook::emit('\OCP\Versions', 'preDelete', array('path' => $abs_path . $v['version']));
unlink($abs_path . $v['version']);
\OC_Hook::emit('\OCP\Versions', 'delete', array('path' => $abs_path . $v['version']));
$versionsSize -= $v['size'];
}
self::setVersionsSize($uid, $versionsSize);
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}
}
unset(self::$deletedFiles[$path]);
}
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/**
* rename versions of a file
*/
public static function rename($old_path, $new_path) {
list($uid, $oldpath) = self::getUidAndFilename($old_path);
list($uidn, $newpath) = self::getUidAndFilename($new_path);
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$versions_view = new \OC\Files\View('/'.$uid .'/files_versions');
$files_view = new \OC\Files\View('/'.$uid .'/files');
// if the file already exists than it was a upload of a existing file
// over the web interface -> store() is the right function we need here
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if ($files_view->file_exists($newpath)) {
return self::store($new_path);
}
self::expire($newpath);
if ( $files_view->is_dir($oldpath) && $versions_view->is_dir($oldpath) ) {
$versions_view->rename($oldpath, $newpath);
} else if ( ($versions = Storage::getVersions($uid, $oldpath)) ) {
// create missing dirs if necessary
self::createMissingDirectories($newpath, new \OC\Files\View('/'. $uidn));
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foreach ($versions as $v) {
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$versions_view->rename($oldpath.'.v'.$v['version'], $newpath.'.v'.$v['version']);
}
}
}
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/**
* rollback to an old version of a file.
*/
public static function rollback($file, $revision) {
if(\OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true') {
list($uid, $filename) = self::getUidAndFilename($file);
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$users_view = new \OC\Files\View('/'.$uid);
$files_view = new \OC\Files\View('/'.\OCP\User::getUser().'/files');
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$versionCreated = false;
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//first create a new version
$version = 'files_versions'.$filename.'.v'.$users_view->filemtime('files'.$filename);
if ( !$users_view->file_exists($version)) {
// disable proxy to prevent multiple fopen calls
$proxyStatus = \OC_FileProxy::$enabled;
\OC_FileProxy::$enabled = false;
$users_view->copy('files'.$filename, 'files_versions'.$filename.'.v'.$users_view->filemtime('files'.$filename));
// reset proxy state
\OC_FileProxy::$enabled = $proxyStatus;
$versionCreated = true;
}
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// rollback
if( @$users_view->rename('files_versions'.$filename.'.v'.$revision, 'files'.$filename) ) {
$files_view->touch($file, $revision);
Storage::expire($file);
return true;
}else if ( $versionCreated ) {
$users_view->unlink($version);
}
}
return false;
}
/**
* @brief get a list of all available versions of a file in descending chronological order
* @param string $uid user id from the owner of the file
* @param string $filename file to find versions of, relative to the user files dir
* @param string $userFullPath
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* @returns array versions newest version first
*/
public static function getVersions($uid, $filename, $userFullPath = '') {
$versions = array();
// fetch for old versions
$view = new \OC\Files\View('/' . $uid . '/' . self::VERSIONS_ROOT);
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$pathinfo = pathinfo($filename);
$files = $view->getDirectoryContent($pathinfo['dirname']);
$versionedFile = $pathinfo['basename'];
foreach ($files as $file) {
if ($file['type'] === 'file') {
$pos = strrpos($file['path'], '.v');
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$currentFile = substr($file['name'], 0, strrpos($file['name'], '.v'));
if ($currentFile === $versionedFile) {
$version = substr($file['path'], $pos + 2);
$key = $version . '#' . $filename;
$versions[$key]['cur'] = 0;
$versions[$key]['version'] = $version;
$versions[$key]['humanReadableTimestamp'] = self::getHumanReadableTimestamp($version);
if (empty($userFullPath)) {
$versions[$key]['preview'] = '';
} else {
$versions[$key]['preview'] = \OCP\Util::linkToRoute('core_ajax_versions_preview', array('file' => $userFullPath, 'version' => $version));
}
$versions[$key]['path'] = $filename;
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$versions[$key]['name'] = $versionedFile;
$versions[$key]['size'] = $file['size'];
}
}
}
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// sort with newest version first
krsort($versions);
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return $versions;
}
new version drop down Squashed commit of the following: commit 0dc404a557fa8253e3a87c7babefba6de8e6dab5 Author: Björn Schießle <schiessle@owncloud.com> Date: Thu Jul 25 10:26:48 2013 +0200 fix 'more versions' button for IE8 commit 5836e652857204d68dfdfa8b3318de8e2fe02493 Author: Björn Schießle <schiessle@owncloud.com> Date: Wed Jul 24 16:56:46 2013 +0200 clean-up some unused code commit ac83e53fa24073783a165796fc3016dc7beca293 Author: Björn Schießle <schiessle@owncloud.com> Date: Wed Jul 24 16:49:03 2013 +0200 fix order of the versions, newest version should come first commit f150a88843af316ff505728941287406f25a0751 Merge: bc713c7 b8e399b Author: Jan-Christoph Borchardt <hey@jancborchardt.net> Date: Wed Jul 24 16:19:36 2013 +0200 Merge branch 'new_versions_dropdown' of github.com:owncloud/core into new_versions_dropdown commit bc713c7b0c3207d00d2f19b10a905a82724c0709 Author: Jan-Christoph Borchardt <hey@jancborchardt.net> Date: Wed Jul 24 16:11:07 2013 +0200 fix position of more versions button commit b8e399b1754ae7656c3cb8cef2c53f6976a83d61 Merge: 24825b0 7b6e39d Author: Björn Schießle <schiessle@owncloud.com> Date: Wed Jul 24 16:04:08 2013 +0200 Merge branch 'new_versions_dropdown' of github.com:owncloud/core into new_versions_dropdown commit 24825b02004efa953197e72b470b9b033030aeee Author: Björn Schießle <schiessle@owncloud.com> Date: Wed Jul 24 16:02:53 2013 +0200 umark previous row if a new row gets selected commit 7b6e39d2939f1b3bba4fff37ca9087dbc7795f03 Merge: 5bfb0ac 7b54644 Author: Jan-Christoph Borchardt <hey@jancborchardt.net> Date: Wed Jul 24 15:37:19 2013 +0200 Merge branch 'new_versions_dropdown' of github.com:owncloud/core into new_versions_dropdown commit 5bfb0ac5c102bdfd3b27a37cea8c792f69b3b803 Author: Jan-Christoph Borchardt <hey@jancborchardt.net> Date: Wed Jul 24 15:37:09 2013 +0200 more style adjustments for version dropdown commit 7b54644d3036ffba448f0525ca09f6e8898b9950 Author: Björn Schießle <schiessle@owncloud.com> Date: Wed Jul 24 15:12:53 2013 +0200 remove debug output commit a75662bcfdce34d4f14020a539172c7ef1b894d3 Author: Jan-Christoph Borchardt <hey@jancborchardt.net> Date: Wed Jul 24 15:12:26 2013 +0200 reword Revert to Restore commit e784644daeac12bc6fa6844f24214a039266ae86 Merge: d07abfd 9978c96 Author: Björn Schießle <schiessle@owncloud.com> Date: Wed Jul 24 15:00:11 2013 +0200 Merge branch 'new_versions_dropdown' of github.com:owncloud/core into new_versions_dropdown commit d07abfdbb49778a8be30b2a6adbe326e1b1f238f Author: Björn Schießle <schiessle@owncloud.com> Date: Wed Jul 24 14:59:17 2013 +0200 if another drop-down is already open, always close it first commit 9978c967a6ecbd2d0e5003df3cf4cdba09dab468 Author: Jan-Christoph Borchardt <hey@jancborchardt.net> Date: Wed Jul 24 14:49:47 2013 +0200 more style improvements for versions commit a13355f16e6172c02069930a60a49aba4ebfa227 Author: Jan-Christoph Borchardt <hey@jancborchardt.net> Date: Wed Jul 24 14:44:13 2013 +0200 position fixes for versioning commit 02c1d6b5eabc4075749c2a7a852c9ed7bbb3644d Merge: c5a9462 203f544 Author: Jan-Christoph Borchardt <hey@jancborchardt.net> Date: Wed Jul 24 14:31:16 2013 +0200 merge versions style changes commit c5a946231a3d011748248db13b6b95ce51eb3e4c Author: Jan-Christoph Borchardt <hey@jancborchardt.net> Date: Wed Jul 24 14:29:56 2013 +0200 bigger clickable area for versions commit 203f544825bd49b168f2316cf2a04caca75438c8 Author: Björn Schießle <schiessle@owncloud.com> Date: Wed Jul 24 14:15:38 2013 +0200 changes visual changes, as suggested by Jan commit 90b1e93676d235a61f318768661b25e5815a9784 Author: Jan-Christoph Borchardt <hey@jancborchardt.net> Date: Wed Jul 24 14:12:23 2013 +0200 remove superfluous selector from ID commit 9768254fe3b2469293fca23151e54cde69bd4661 Merge: c961278 b91c682 Author: Björn Schießle <schiessle@owncloud.com> Date: Wed Jul 24 12:28:06 2013 +0200 Merge branch 'master' into new_versions_dropdown commit c9612781e10a4de9e9405244f87c4e29428a0d3f Author: Björn Schießle <schiessle@owncloud.com> Date: Wed Jul 24 11:05:25 2013 +0200 replace modal dialog with a OC.Notification commit 3dc7508a4c271818247afbaed0ce0b03706a8db6 Author: Björn Schießle <schiessle@owncloud.com> Date: Wed Jul 24 10:33:05 2013 +0200 use image path without extension for proper svg to png fallback commit 23ea7ad46c73fa4b86021070eb58a3b92bc8362e Author: Björn Schießle <schiessle@owncloud.com> Date: Tue Jul 23 17:53:58 2013 +0200 some css fixes commit 8d01499ae17e43a7d7960841a7c2127fa6de5a56 Author: Björn Schießle <schiessle@owncloud.com> Date: Tue Jul 23 17:40:16 2013 +0200 small fixes and improvements according to @Kondou-ger comments commit 985b6461e81035967959659fab8ea59c733e00eb Author: Björn Schießle <schiessle@owncloud.com> Date: Tue Jul 23 15:58:19 2013 +0200 replace == with === commit bc8fc3b4a664db2d819e0a7091f31207ffcfe44a Merge: c1da183 a94c55b Author: Björn Schießle <schiessle@owncloud.com> Date: Tue Jul 23 13:55:45 2013 +0200 Merge branch 'master' into new_versions_dropdown commit c1da183d13b8098eb33e708d4fdd04111bdc33a5 Author: Björn Schießle <schiessle@owncloud.com> Date: Tue Jul 23 13:53:37 2013 +0200 translate timestamps into strings like "X minutes ago" for the versions drop-down commit c78d2b4bfb0a6800ab8516ac115ba42268be019a Author: Björn Schießle <schiessle@owncloud.com> Date: Tue Jul 23 12:52:44 2013 +0200 download versions directly from the versions drop-down commit 14aaf9907625fc76bc153cd846704b7efd15db46 Author: Björn Schießle <schiessle@owncloud.com> Date: Tue Jul 23 11:01:21 2013 +0200 only show 'more versions' button of necessary commit a0d8cb46b2255be3d9b3f9bd5f835a173c9665b8 Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 22 17:49:17 2013 +0200 remove unneeded code commit 47eec0679ce16ece0b7890e9b41bf28d7613b131 Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 22 17:44:58 2013 +0200 add title for revert and download action commit df87ccb24327b5c2770f7c23c97e41b143d65ec3 Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 22 17:36:40 2013 +0200 add download button to versions drop-down commit 622c87ec37c14b7b3237bc9ca980b7f35689a933 Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 22 17:36:08 2013 +0200 adapt css file for the new versions drop-down commit 300699024fe74a9f0f998c1cce4024484311f50c Author: Björn Schießle <schiessle@owncloud.com> Date: Fri Jun 7 17:28:34 2013 +0200 revert on click commit 6673ae6ed45bbda1e0d962e9b32e943afc7123c0 Author: Björn Schießle <schiessle@owncloud.com> Date: Fri Jun 7 16:50:08 2013 +0200 new versions list, show the latest 5 with a button to retrieve more versions if needed
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/**
* @brief translate a timestamp into a string like "5 days ago"
* @param int $timestamp
* @return string for example "5 days ago"
*/
private static function getHumanReadableTimestamp($timestamp) {
$diff = time() - $timestamp;
if ($diff < 60) { // first minute
return $diff . " seconds ago";
} elseif ($diff < 3600) { //first hour
return round($diff / 60) . " minutes ago";
} elseif ($diff < 86400) { // first day
return round($diff / 3600) . " hours ago";
} elseif ($diff < 604800) { //first week
return round($diff / 86400) . " days ago";
} elseif ($diff < 2419200) { //first month
return round($diff / 604800) . " weeks ago";
} elseif ($diff < 29030400) { // first year
return round($diff / 2419200) . " months ago";
} else {
return round($diff / 29030400) . " years ago";
}
}
/**
* @brief deletes used space for files versions in db if user was deleted
*
* @param type $uid id of deleted user
* @return \OC_DB_StatementWrapper of db delete operation
*/
public static function deleteUser($uid) {
$query = \OC_DB::prepare('DELETE FROM `*PREFIX*files_versions` WHERE `user`=?');
return $query->execute(array($uid));
}
/**
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* @brief get the size of all stored versions from a given user
* @param $uid id from the user
* @return size of vesions
*/
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private static function calculateSize($uid) {
if (\OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED) == 'true') {
$view = new \OC\Files\View('/' . $uid . '/files_versions');
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$size = 0;
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$dirContent = $view->getDirectoryContent('/');
while (!empty($dirContent)) {
$path = reset($dirContent);
if ($path['type'] === 'dir') {
$dirContent = array_merge($dirContent, $view->getDirectoryContent(substr($path['path'], strlen('files_versions'))));
} else {
$size += $view->filesize(substr($path['path'], strlen('files_versions')));
}
unset($dirContent[key($dirContent)]);
}
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return $size;
}
}
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/**
* @brief returns all stored file versions from a given user
* @param string $uid id of the user
* @return array with contains two arrays 'all' which contains all versions sorted by age and 'by_file' which contains all versions sorted by filename
*/
private static function getAllVersions($uid) {
$view = new \OC\Files\View('/' . $uid . '/');
$dirs = array(self::VERSIONS_ROOT);
while (!empty($dirs)) {
$dir = array_pop($dirs);
$files = $view->getDirectoryContent($dir);
foreach ($files as $file) {
if ($file['type'] === 'dir') {
array_push($dirs, $file['path']);
} else {
$versionsBegin = strrpos($file['path'], '.v');
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$relPathStart = strlen(self::VERSIONS_ROOT);
$version = substr($file['path'], $versionsBegin + 2);
$relpath = substr($file['path'], $relPathStart, $versionsBegin - $relPathStart);
$key = $version . '#' . $relpath;
$versions[$key] = array('path' => $relpath, 'timestamp' => $version);
}
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}
}
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// newest version first
krsort($versions);
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$result = array();
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foreach ($versions as $key => $value) {
$size = $view->filesize(self::VERSIONS_ROOT.'/'.$value['path'].'.v'.$value['timestamp']);
$filename = $value['path'];
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$result['all'][$key]['version'] = $value['timestamp'];
$result['all'][$key]['path'] = $filename;
$result['all'][$key]['size'] = $size;
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$result['by_file'][$filename][$key]['version'] = $value['timestamp'];
$result['by_file'][$filename][$key]['path'] = $filename;
$result['by_file'][$filename][$key]['size'] = $size;
}
return $result;
}
/**
* @brief get list of files we want to expire
* @param array $versions list of versions
* @param integer $time
* @return array containing the list of to deleted versions and the size of them
*/
protected static function getExpireList($time, $versions) {
$size = 0;
$toDelete = array(); // versions we want to delete
$interval = 1;
$step = Storage::$max_versions_per_interval[$interval]['step'];
if (Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'] == -1) {
$nextInterval = -1;
} else {
$nextInterval = $time - Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'];
}
$firstVersion = reset($versions);
$firstKey = key($versions);
$prevTimestamp = $firstVersion['version'];
$nextVersion = $firstVersion['version'] - $step;
unset($versions[$firstKey]);
foreach ($versions as $key => $version) {
$newInterval = true;
while ($newInterval) {
if ($nextInterval == -1 || $prevTimestamp > $nextInterval) {
if ($version['version'] > $nextVersion) {
//distance between two version too small, mark to delete
$toDelete[$key] = $version['path'] . '.v' . $version['version'];
$size += $version['size'];
\OCP\Util::writeLog('files_versions', 'Mark to expire '. $version['path'] .' next version should be ' . $nextVersion . " or smaller. (prevTimestamp: " . $prevTimestamp . "; step: " . $step, \OCP\Util::DEBUG);
} else {
$nextVersion = $version['version'] - $step;
$prevTimestamp = $version['version'];
}
$newInterval = false; // version checked so we can move to the next one
} else { // time to move on to the next interval
$interval++;
$step = Storage::$max_versions_per_interval[$interval]['step'];
$nextVersion = $prevTimestamp - $step;
if (Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'] == -1) {
$nextInterval = -1;
} else {
$nextInterval = $time - Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'];
}
$newInterval = true; // we changed the interval -> check same version with new interval
}
}
}
return array($toDelete, $size);
}
/**
* @brief Erase a file's versions which exceed the set quota
*/
private static function expire($filename, $versionsSize = null, $offset = 0) {
if(\OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true') {
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list($uid, $filename) = self::getUidAndFilename($filename);
$versionsFileview = new \OC\Files\View('/'.$uid.'/files_versions');
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// get available disk space for user
$softQuota = true;
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$quota = \OC_Preferences::getValue($uid, 'files', 'quota');
if ( $quota === null || $quota === 'default') {
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$quota = \OC::$server->getAppConfig()->getValue('files', 'default_quota');
}
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if ( $quota === null || $quota === 'none' ) {
$quota = \OC\Files\Filesystem::free_space('/');
$softQuota = false;
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} else {
$quota = \OCP\Util::computerFileSize($quota);
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}
// make sure that we have the current size of the version history
if ( $versionsSize === null ) {
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$versionsSize = self::getVersionsSize($uid);
if ( $versionsSize === false || $versionsSize < 0 ) {
$versionsSize = self::calculateSize($uid);
}
}
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// calculate available space for version history
// subtract size of files and current versions size from quota
if ($softQuota) {
$files_view = new \OC\Files\View('/'.$uid.'/files');
$rootInfo = $files_view->getFileInfo('/', false);
$free = $quota-$rootInfo['size']; // remaining free space for user
if ( $free > 0 ) {
$availableSpace = ($free * self::DEFAULTMAXSIZE / 100) - ($versionsSize + $offset); // how much space can be used for versions
} else {
$availableSpace = $free - $versionsSize - $offset;
}
} else {
$availableSpace = $quota - $offset;
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}
$allVersions = Storage::getVersions($uid, $filename);
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$time = time();
list($toDelete, $sizeOfDeletedVersions) = self::getExpireList($time, $allVersions);
$availableSpace = $availableSpace + $sizeOfDeletedVersions;
$versionsSize = $versionsSize - $sizeOfDeletedVersions;
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// if still not enough free space we rearrange the versions from all files
if ($availableSpace <= 0) {
$result = Storage::getAllVersions($uid);
$allVersions = $result['all'];
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foreach ($result['by_file'] as $versions) {
list($toDeleteNew, $size) = self::getExpireList($time, $versions);
$toDelete = array_merge($toDelete, $toDeleteNew);
$sizeOfDeletedVersions += $size;
}
$availableSpace = $availableSpace + $sizeOfDeletedVersions;
$versionsSize = $versionsSize - $sizeOfDeletedVersions;
}
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foreach($toDelete as $key => $path) {
\OC_Hook::emit('\OCP\Versions', 'preDelete', array('path' => $path));
$versionsFileview->unlink($path);
\OC_Hook::emit('\OCP\Versions', 'delete', array('path' => $path));
unset($allVersions[$key]); // update array with the versions we keep
\OCP\Util::writeLog('files_versions', "Expire: " . $path, \OCP\Util::DEBUG);
}
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// Check if enough space is available after versions are rearranged.
// If not we delete the oldest versions until we meet the size limit for versions,
// but always keep the two latest versions
$numOfVersions = count($allVersions) -2 ;
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$i = 0;
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while ($availableSpace < 0 && $i < $numOfVersions) {
$version = current($allVersions);
\OC_Hook::emit('\OCP\Versions', 'preDelete', array('path' => $version['path'].'.v'.$version['version']));
$versionsFileview->unlink($version['path'].'.v'.$version['version']);
\OC_Hook::emit('\OCP\Versions', 'delete', array('path' => $version['path'].'.v'.$version['version']));
\OCP\Util::writeLog('files_versions', 'running out of space! Delete oldest version: ' . $version['path'].'.v'.$version['version'] , \OCP\Util::DEBUG);
$versionsSize -= $version['size'];
$availableSpace += $version['size'];
next($allVersions);
$i++;
}
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return $versionsSize; // finally return the new size of the version history
}
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return false;
}
/**
* @brief create recursively missing directories
* @param string $filename $path to a file
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* @param \OC\Files\View $view view on data/user/
*/
private static function createMissingDirectories($filename, $view) {
$dirname = \OC\Files\Filesystem::normalizePath(dirname($filename));
$dirParts = explode('/', $dirname);
$dir = "/files_versions";
foreach ($dirParts as $part) {
$dir = $dir . '/' . $part;
if (!$view->file_exists($dir)) {
$view->mkdir($dir);
}
}
}
}