SharedMount.php

<?php
/**
 * @author Björn Schießle <bjoern@schiessle.org>
 * @author Joas Schilling <nickvergessen@owncloud.com>
 * @author Morris Jobke <hey@morrisjobke.de>
 * @author Robin Appelman <icewind@owncloud.com>
 * @author Roeland Jago Douma <rullzer@owncloud.com>
 *
 * @copyright Copyright (c) 2016, ownCloud, Inc.
 * @license AGPL-3.0
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * This program 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, version 3,
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 *
 */

namespace OCA\Files_Sharing;

use OC\Files\Filesystem;
use OC\Files\Mount\MountPoint;
use OC\Files\Mount\MoveableMount;
use OC\Files\View;

/**
 * Shared mount points can be moved by the user
 */
class SharedMount extends MountPoint implements MoveableMount {
    /**
     * @var \OC\Files\Storage\Shared $storage
     */
    protected $storage = null;

    /**
     * @var \OC\Files\View
     */
    private $recipientView;

    /**
     * @var string
     */
    private $user;

    /** @var \OCP\Share\IShare */
    private $superShare;

    /** @var \OCP\Share\IShare[] */
    private $groupedShares;

    /**
     * @param string $storage
     * @param SharedMount[] $mountpoints
     * @param array|null $arguments
     * @param \OCP\Files\Storage\IStorageFactory $loader
     */
    public function __construct($storage, array $mountpoints, $arguments = null, $loader = null) {
        $this->user = $arguments['user'];
        $this->recipientView = new View('/' . $this->user . '/files');

        $this->superShare = $arguments['superShare'];
        $this->groupedShares = $arguments['groupedShares'];

        $newMountPoint = $this->verifyMountPoint($this->superShare, $mountpoints);
        $absMountPoint = '/' . $this->user . '/files' . $newMountPoint;
        $arguments['ownerView'] = new View('/' . $this->superShare->getShareOwner() . '/files');
        parent::__construct($storage, $absMountPoint, $arguments, $loader);
    }

    /**
     * check if the parent folder exists otherwise move the mount point up
     *
     * @param \OCP\Share\IShare $share
     * @param SharedMount[] $mountpoints
     * @return string
     */
    private function verifyMountPoint(\OCP\Share\IShare $share, array $mountpoints) {

        $mountPoint = basename($share->getTarget());
        $parent = dirname($share->getTarget());

        if (!$this->recipientView->is_dir($parent)) {
            $parent = Helper::getShareFolder($this->recipientView);
        }

        $newMountPoint = $this->generateUniqueTarget(
            \OC\Files\Filesystem::normalizePath($parent . '/' . $mountPoint),
            $this->recipientView,
            $mountpoints
        );

        if ($newMountPoint !== $share->getTarget()) {
            $this->updateFileTarget($newMountPoint, $share);
        }

        return $newMountPoint;
    }

    /**
     * update fileTarget in the database if the mount point changed
     *
     * @param string $newPath
     * @param \OCP\Share\IShare $share
     * @return bool
     */
    private function updateFileTarget($newPath, &$share) {
        $share->setTarget($newPath);

        foreach ($this->groupedShares as $share) {
            $share->setTarget($newPath);
            \OC::$server->getShareManager()->moveShare($share, $this->user);
        }
    }


    /**
     * @param string $path
     * @param View $view
     * @param SharedMount[] $mountpoints
     * @return mixed
     */
    private function generateUniqueTarget($path, $view, array $mountpoints) {
        $pathinfo = pathinfo($path);
        $ext = (isset($pathinfo['extension'])) ? '.'.$pathinfo['extension'] : '';
        $name = $pathinfo['filename'];
        $dir = $pathinfo['dirname'];


// INFO SUR LE BUG DES 2
$targets = array_map(function($mountPoint) {
return $mountPoint->getShare()->getTarget();
}, $mountpoints);
// INFO SUR LE BUG DES 2


        // Helper function to find existing mount points
        $mountpointExists = function($path) use ($mountpoints) {
            foreach ($mountpoints as $mountpoint) {
//DEBUG 2 ?
                if ($mountpoint->getShare()->getTarget() === $path) {
//DEBUG 2 ?
//              if ($mountpoint->getShare()->getTarget() === $path && $mountpoint->getShare()->getId() !== $this->superShare->getId()) {
//DEBUG 2 ?
                    return true;
                }
            }
            return false;
        };

//DEBUG 2 ?
//return $path;
//DEBUG 2 ?


        $i = 2;
        while ($view->file_exists($path) || $mountpointExists($path)) {



// INFO SUR LE BUG DES 2
/*$debugInfo = [
'user' => $this->user,
'path' => $path,
'file_exists' => $view->file_exists($path),
'mountpointExists' => $mountpointExists($path),
'targets' => $targets,
];
\OC::$server->getLogger()->debug('SharedMount:: ' . json_encode($debugInfo), array('app' => 'DEBUG'));*/
// INFO SUR LE BUG DES 2



            $path = Filesystem::normalizePath($dir . '/' . $name . ' ('.$i.')' . $ext);
            $i++;
        }

        return $path;
    }

    /**
     * Format a path to be relative to the /user/files/ directory
     *
     * @param string $path the absolute path
     * @return string e.g. turns '/admin/files/test.txt' into '/test.txt'
     * @throws \OCA\Files_Sharing\Exceptions\BrokenPath
     */
    protected function stripUserFilesPath($path) {
        $trimmed = ltrim($path, '/');
        $split = explode('/', $trimmed);

        // it is not a file relative to data/user/files
        if (count($split) < 3 || $split[1] !== 'files') {
            \OCP\Util::writeLog('file sharing',
                'Can not strip userid and "files/" from path: ' . $path,
                \OCP\Util::ERROR);
            throw new \OCA\Files_Sharing\Exceptions\BrokenPath('Path does not start with /user/files', 10);
        }

        // skip 'user' and 'files'
        $sliced = array_slice($split, 2);
        $relPath = implode('/', $sliced);

        return '/' . $relPath;
    }

    /**
     * Move the mount point to $target
     *
     * @param string $target the target mount point
     * @return bool
     */
    public function moveMount($target) {

        $relTargetPath = $this->stripUserFilesPath($target);
        $share = $this->storage->getShare();

        $result = true;

        try {
            $this->updateFileTarget($relTargetPath, $share);
            $this->setMountPoint($target);
            $this->storage->setMountPoint($relTargetPath);
        } catch (\Exception $e) {
            \OCP\Util::writeLog('file sharing',
                'Could not rename mount point for shared folder "' . $this->getMountPoint() . '" to "' . $target . '"',
                \OCP\Util::ERROR);
        }

        return $result;
    }

    /**
     * Remove the mount points
     *
     * @return bool
     */
    public function removeMount() {
        $mountManager = \OC\Files\Filesystem::getMountManager();
        /** @var $storage \OC\Files\Storage\Shared */
        $storage = $this->getStorage();
        $result = $storage->unshareStorage();
        $mountManager->removeMount($this->mountPoint);

        return $result;
    }

    /**
     * @return \OCP\Share\IShare
     */
    public function getShare() {
        return $this->superShare;
    }

    /**
     * Get the file id of the root of the storage
     *
     * @return int
     */
    public function getStorageRootId() {
        return $this->getShare()->getNodeId();
    }

    public function getStorageNumericId() {
        $query = \OC::$server->getDatabaseConnection()->getQueryBuilder();
        $query->select('storage')
            ->from('filecache')
            ->where($query->expr()->eq('fileid', $query->createNamedParameter($this->getStorageRootId())));

        $result = $query->execute();
        $row = $result->fetch();
        $result->closeCursor();
        if ($row) {
            return $row['storage'];
        }
        return -1;
    }
}