nextcloud/apps/files_sharing/sharedstorage.php

499 lines
14 KiB
PHP

<?php
/**
* ownCloud
*
* @author Michael Gapczynski
* @copyright 2011 Michael Gapczynski GapczynskiM@gmail.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library 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 along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
require_once( 'lib_share.php' );
/**
* Convert target path to source path and pass the function call to the correct storage provider
*/
class OC_Filestorage_Shared extends OC_Filestorage_Common {
private $datadir;
private $sourcePaths = array();
public function __construct($arguments) {
$this->datadir = $arguments['datadir'];
$this->datadir .= "/";
}
public function getInternalPath($path) {
$mountPoint = OC_Filesystem::getMountPoint($path);
$internalPath = substr($path, strlen($mountPoint));
return $internalPath;
}
public function getSource($target) {
$target = $this->datadir.$target;
if (array_key_exists($target, $this->sourcePaths)) {
return $this->sourcePaths[$target];
} else {
$source = OC_Share::getSource($target);
$this->sourcePaths[$target] = $source;
return $source;
}
}
public function mkdir($path) {
if ($path == "" || $path == "/" || !$this->is_writable($path)) {
return false;
} else {
$source = $this->getSource($path);
if ($source) {
$storage = OC_Filesystem::getStorage($source);
return $storage->mkdir($this->getInternalPath($source));
}
}
}
public function rmdir($path) {
// The folder will be removed from the database, but won't be deleted from the owner's filesystem
OC_Share::unshareFromMySelf($this->datadir.$path);
}
public function opendir($path) {
if ($path == "" || $path == "/") {
$path = $this->datadir.$path;
$sharedItems = OC_Share::getItemsInFolder($path);
$files = array();
foreach ($sharedItems as $item) {
// If item is in the root of the shared storage provider and the item exists add it to the fakedirs
if (dirname($item['target'])."/" == $path && $this->file_exists(basename($item['target']))) {
$files[] = basename($item['target']);
}
}
OC_FakeDirStream::$dirs['shared'.$path] = $files;
return opendir('fakedir://shared'.$path);
} else {
$source = $this->getSource($path);
if ($source) {
$storage = OC_Filesystem::getStorage($source);
$dh = $storage->opendir($this->getInternalPath($source));
$modifiedItems = OC_Share::getItemsInFolder($source);
if ($modifiedItems && $dh) {
$sources = array();
$targets = array();
// Remove any duplicate or trailing '/'
$path = preg_replace('{(/)\1+}', "/", $path);
$targetFolder = rtrim($this->datadir.$path, "/");
foreach ($modifiedItems as $item) {
// If the item is in the current directory and the item exists add it to the arrays
if (dirname($item['target']) == $targetFolder && $this->file_exists($path."/".basename($item['target']))) {
// If the item was unshared from self, add it it to the arrays
if ($item['permissions'] == OC_Share::UNSHARED) {
$sources[] = basename($item['source']);
$targets[] = "";
} else {
$sources[] = basename($item['source']);
$targets[] = basename($item['target']);
}
}
}
// Don't waste time if there aren't any modified items in the current directory
if (empty($sources)) {
return $dh;
} else {
global $FAKEDIRS;
$files = array();
while (($filename = readdir($dh)) !== false) {
if ($filename != "." && $filename != "..") {
// If the file isn't in the sources array it isn't modified and can be added as is
if (!in_array($filename, $sources)) {
$files[] = $filename;
// The file has a different name than the source and is added to the fakedirs
} else {
$target = $targets[array_search($filename, $sources)];
// Don't add the file if it was unshared from self by the user
if ($target != "") {
$files[] = $target;
}
}
}
}
$FAKEDIRS['shared'] = $files;
return opendir('fakedir://shared');
}
} else {
return $dh;
}
}
}
}
public function is_dir($path) {
if ($path == "" || $path == "/") {
return true;
} else {
$source = $this->getSource($path);
if ($source) {
$storage = OC_Filesystem::getStorage($source);
return $storage->is_dir($this->getInternalPath($source));
}
}
}
public function is_file($path) {
$source = $this->getSource($path);
if ($source) {
$storage = OC_Filesystem::getStorage($source);
return $storage->is_file($this->getInternalPath($source));
}
}
// TODO fill in other components of array
public function stat($path) {
if ($path == "" || $path == "/") {
$stat["size"] = $this->filesize($path);
$stat["mtime"] = $this->filemtime($path);
$stat["ctime"] = $this->filectime($path);
return $stat;
} else {
$source = $this->getSource($path);
if ($source) {
$storage = OC_Filesystem::getStorage($source);
return $storage->stat($this->getInternalPath($source));
}
}
}
public function filetype($path) {
if ($path == "" || $path == "/") {
return "dir";
} else {
$source = $this->getSource($path);
if ($source) {
$storage = OC_Filesystem::getStorage($source);
return $storage->filetype($this->getInternalPath($source));
}
}
}
public function filesize($path) {
if ($path == "" || $path == "/" || $this->is_dir($path)) {
return 0;
} else {
$source = $this->getSource($path);
if ($source) {
$storage = OC_Filesystem::getStorage($source);
return $storage->filesize($this->getInternalPath($source));
}
}
}
public function is_readable($path) {
return true;
}
public function is_writable($path) {
if($path == "" || $path == "/"){
return false;
}elseif (OC_Share::getPermissions($this->datadir.$path) & OC_Share::WRITE) {
return true;
} else {
return false;
}
}
public function file_exists($path) {
if ($path == "" || $path == "/") {
return true;
} else {
$source = $this->getSource($path);
if ($source) {
$storage = OC_Filesystem::getStorage($source);
return $storage->file_exists($this->getInternalPath($source));
}
}
}
public function filectime($path) {
if ($path == "" || $path == "/") {
$ctime = 0;
if ($dh = $this->opendir($path)) {
while (($filename = readdir($dh)) !== false) {
$tempctime = $this->filectime($filename);
if ($tempctime < $ctime) {
$ctime = $tempctime;
}
}
}
return $ctime;
} else {
$source = $this->getSource($path);
if ($source) {
$storage = OC_Filesystem::getStorage($source);
return $storage->filectime($this->getInternalPath($source));
}
}
}
public function filemtime($path) {
if ($path == "" || $path == "/") {
$mtime = 0;
if ($dh = $this->opendir($path)) {
while (($filename = readdir($dh)) !== false) {
$tempmtime = $this->filemtime($filename);
if ($tempmtime > $mtime) {
$mtime = $tempmtime;
}
}
}
return $mtime;
} else {
$source = $this->getSource($path);
if ($source) {
$storage = OC_Filesystem::getStorage($source);
return $storage->filemtime($this->getInternalPath($source));
}
}
}
public function file_get_contents($path) {
$source = $this->getSource($path);
if ($source) {
$info = array(
'target' => $this->datadir.$path,
'source' => $source,
);
OCP\Util::emitHook('OC_Filestorage_Shared', 'file_get_contents', $info);
$storage = OC_Filesystem::getStorage($source);
return $storage->file_get_contents($this->getInternalPath($source));
}
}
public function file_put_contents($path, $data) {
if ($this->is_writable($path)) {
$source = $this->getSource($path);
if ($source) {
$info = array(
'target' => $this->datadir.$path,
'source' => $source,
);
OCP\Util::emitHook('OC_Filestorage_Shared', 'file_put_contents', $info);
$storage = OC_Filesystem::getStorage($source);
$result = $storage->file_put_contents($this->getInternalPath($source), $data);
return $result;
}
}
}
public function unlink($path) {
// The item will be removed from the database, but won't be touched on the owner's filesystem
$target = $this->datadir.$path;
// Check if the item is inside a shared folder
if (OC_Share::getParentFolders($target)) {
// If entry for item already exists
if (OC_Share::getItem($target)) {
OC_Share::unshareFromMySelf($target, false);
} else {
OC_Share::pullOutOfFolder($target, $target);
OC_Share::unshareFromMySelf($target, false);
}
// Delete the database entry
} else {
OC_Share::unshareFromMySelf($target);
}
return true;
}
public function rename($path1, $path2) {
$oldTarget = $this->datadir.$path1;
$newTarget = $this->datadir.$path2;
// Check if the item is inside a shared folder
if ($folders = OC_Share::getParentFolders($oldTarget)) {
$root1 = substr($path1, 0, strpos($path1, "/"));
$root2 = substr($path1, 0, strpos($path2, "/"));
// Prevent items from being moved into different shared folders until versioning (cut and paste) and prevent items going into 'Shared'
if ($root1 !== $root2) {
return false;
// Check if both paths have write permission
} else if ($this->is_writable($path1) && $this->is_writable($path2)) {
$oldSource = $this->getSource($path1);
$newSource = $folders['source'].substr($newTarget, strlen($folders['target']));
if ($oldSource) {
$storage = OC_Filesystem::getStorage($oldSource);
return $storage->rename($this->getInternalPath($oldSource), $this->getInternalPath($newSource));
}
// If the user doesn't have write permission, items can only be renamed and not moved
} else if (dirname($path1) !== dirname($path2)) {
return false;
// The item will be renamed in the database, but won't be touched on the owner's filesystem
} else {
OC_Share::pullOutOfFolder($oldTarget, $newTarget);
// If this is a folder being renamed, call setTarget in case there are any database entries inside the folder
if (self::is_dir($path1)) {
OC_Share::setTarget($oldTarget, $newTarget);
}
}
} else {
OC_Share::setTarget($oldTarget, $newTarget);
}
return true;
}
public function copy($path1, $path2) {
if ($path2 == "" || $path2 == "/") {
// TODO Construct new shared item or should this not be allowed?
} else {
if ($this->is_writable($path2)) {
$tmpFile = $this->toTmpFile($path1);
$result = $this->fromTmpFile($tmpFile, $path2);
return $result;
} else {
return false;
}
}
}
public function fopen($path, $mode) {
$source = $this->getSource($path);
if ($source) {
switch ($mode) {
case 'r+':
case 'rb+':
case 'w+':
case 'wb+':
case 'x+':
case 'xb+':
case 'a+':
case 'ab+':
case 'w':
case 'wb':
case 'x':
case 'xb':
case 'a':
case 'ab':
if (!$this->is_writable($path)) {
return false;
}
}
$info = array(
'target' => $this->datadir.$path,
'source' => $source,
'mode' => $mode,
);
OCP\Util::emitHook('OC_Filestorage_Shared', 'fopen', $info);
$storage = OC_Filesystem::getStorage($source);
return $storage->fopen($this->getInternalPath($source), $mode);
}
}
public function toTmpFile($path) {
$source = $this->getSource($path);
if ($source) {
$storage = OC_Filesystem::getStorage($source);
return $storage->toTmpFile($this->getInternalPath($source));
}
}
public function fromTmpFile($tmpFile, $path) {
if ($this->is_writable($path)) {
$source = $this->getSource($path);
if ($source) {
$storage = OC_Filesystem::getStorage($source);
$result = $storage->fromTmpFile($tmpFile, $this->getInternalPath($source));
return $result;
}
} else {
return false;
}
}
public function getMimeType($path) {
if ($path == "" || $path == "/") {
return 'httpd/unix-directory';
}
$source = $this->getSource($path);
if ($source) {
$storage = OC_Filesystem::getStorage($source);
return $storage->getMimeType($this->getInternalPath($source));
}
}
public function hash($type, $path, $raw = false) {
$source = $this->getSource($path);
if ($source) {
$storage = OC_Filesystem::getStorage($source);
return $storage->hash($type, $this->getInternalPath($source), $raw);
}
}
public function free_space($path) {
$source = $this->getSource($path);
if ($source) {
$storage = OC_Filesystem::getStorage($source);
return $storage->free_space($this->getInternalPath($source));
}
}
public function search($query) {
return $this->searchInDir($query);
}
protected function searchInDir($query, $path = "") {
$files = array();
if ($dh = $this->opendir($path)) {
while (($filename = readdir($dh)) !== false) {
if ($filename != "." && $filename != "..") {
if (strstr(strtolower($filename), strtolower($query))) {
$files[] = $path."/".$filename;
}
if ($this->is_dir($path."/".$filename)) {
$files = array_merge($files, $this->searchInDir($query, $path."/".$filename));
}
}
}
}
return $files;
}
public function getLocalFile($path) {
$source = $this->getSource($path);
if ($source) {
$storage = OC_Filesystem::getStorage($source);
return $storage->getLocalFile($this->getInternalPath($source));
}
}
public function touch($path, $mtime=null){
$source = $this->getSource($path);
if ($source) {
$storage = OC_Filesystem::getStorage($source);
return $storage->touch($this->getInternalPath($source),$mtime);
}
}
public static function setup($options) {
$user_dir = $options['user_dir'];
OC_Filesystem::mount('OC_Filestorage_Shared', array('datadir' => $user_dir.'/Shared'), $user_dir.'/Shared/');
}
/**
* check if a file or folder has been updated since $time
* @param int $time
* @return bool
*/
public function hasUpdated($path,$time){
//TODO
return $this->filemtime($path)>$time;
}
}