1 files changed, 308 insertions, 0 deletions
diff --git a/lib/private/Files/Cache/Wrapper/CacheJail.php b/lib/private/Files/Cache/Wrapper/CacheJail.php
new file mode 100644
index 00000000000..3148d1412f4
--- /dev/null
+++ b/lib/private/Files/Cache/Wrapper/CacheJail.php
@@ -0,0 +1,308 @@
+<?php
+/**
+ * @author Morris Jobke <hey@morrisjobke.de>
+ * @author Robin Appelman <icewind@owncloud.com>
+ * @author Robin McCorkell <robin@mccorkell.me.uk>
+ * @author Vincent Petry <pvince81@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 OC\Files\Cache\Wrapper;
+use OC\Files\Cache\Cache;
+
+/**
+ * Jail to a subdirectory of the wrapped cache
+ */
+class CacheJail extends CacheWrapper {
+	/**
+	 * @var string
+	 */
+	protected $root;
+
+	/**
+	 * @param \OCP\Files\Cache\ICache $cache
+	 * @param string $root
+	 */
+	public function __construct($cache, $root) {
+		parent::__construct($cache);
+		$this->root = $root;
+	}
+
+	protected function getSourcePath($path) {
+		if ($path === '') {
+			return $this->root;
+		} else {
+			return $this->root . '/' . ltrim($path, '/');
+		}
+	}
+
+	/**
+	 * @param string $path
+	 * @return null|string the jailed path or null if the path is outside the jail
+	 */
+	protected function getJailedPath($path) {
+		$rootLength = strlen($this->root) + 1;
+		if ($path === $this->root) {
+			return '';
+		} else if (substr($path, 0, $rootLength) === $this->root . '/') {
+			return substr($path, $rootLength);
+		} else {
+			return null;
+		}
+	}
+
+	/**
+	 * @param array $entry
+	 * @return array
+	 */
+	protected function formatCacheEntry($entry) {
+		if (isset($entry['path'])) {
+			$entry['path'] = $this->getJailedPath($entry['path']);
+		}
+		return $entry;
+	}
+
+	protected function filterCacheEntry($entry) {
+		$rootLength = strlen($this->root) + 1;
+		return ($entry['path'] === $this->root) or (substr($entry['path'], 0, $rootLength) === $this->root . '/');
+	}
+
+	/**
+	 * get the stored metadata of a file or folder
+	 *
+	 * @param string /int $file
+	 * @return array|false
+	 */
+	public function get($file) {
+		if (is_string($file) or $file == '') {
+			$file = $this->getSourcePath($file);
+		}
+		return parent::get($file);
+	}
+
+	/**
+	 * insert meta data for a new file or folder
+	 *
+	 * @param string $file
+	 * @param array $data
+	 *
+	 * @return int file id
+	 * @throws \RuntimeException
+	 */
+	public function insert($file, array $data) {
+		return $this->cache->insert($this->getSourcePath($file), $data);
+	}
+
+	/**
+	 * update the metadata in the cache
+	 *
+	 * @param int $id
+	 * @param array $data
+	 */
+	public function update($id, array $data) {
+		$this->cache->update($id, $data);
+	}
+
+	/**
+	 * get the file id for a file
+	 *
+	 * @param string $file
+	 * @return int
+	 */
+	public function getId($file) {
+		return $this->cache->getId($this->getSourcePath($file));
+	}
+
+	/**
+	 * get the id of the parent folder of a file
+	 *
+	 * @param string $file
+	 * @return int
+	 */
+	public function getParentId($file) {
+		if ($file === '') {
+			return -1;
+		} else {
+			return $this->cache->getParentId($this->getSourcePath($file));
+		}
+	}
+
+	/**
+	 * check if a file is available in the cache
+	 *
+	 * @param string $file
+	 * @return bool
+	 */
+	public function inCache($file) {
+		return $this->cache->inCache($this->getSourcePath($file));
+	}
+
+	/**
+	 * remove a file or folder from the cache
+	 *
+	 * @param string $file
+	 */
+	public function remove($file) {
+		$this->cache->remove($this->getSourcePath($file));
+	}
+
+	/**
+	 * Move a file or folder in the cache
+	 *
+	 * @param string $source
+	 * @param string $target
+	 */
+	public function move($source, $target) {
+		$this->cache->move($this->getSourcePath($source), $this->getSourcePath($target));
+	}
+
+	/**
+	 * remove all entries for files that are stored on the storage from the cache
+	 */
+	public function clear() {
+		$this->cache->remove($this->root);
+	}
+
+	/**
+	 * @param string $file
+	 *
+	 * @return int Cache::NOT_FOUND, Cache::PARTIAL, Cache::SHALLOW or Cache::COMPLETE
+	 */
+	public function getStatus($file) {
+		return $this->cache->getStatus($this->getSourcePath($file));
+	}
+
+	private function formatSearchResults($results) {
+		$results = array_filter($results, array($this, 'filterCacheEntry'));
+		$results = array_values($results);
+		return array_map(array($this, 'formatCacheEntry'), $results);
+	}
+
+	/**
+	 * search for files matching $pattern
+	 *
+	 * @param string $pattern
+	 * @return array an array of file data
+	 */
+	public function search($pattern) {
+		$results = $this->cache->search($pattern);
+		return $this->formatSearchResults($results);
+	}
+
+	/**
+	 * search for files by mimetype
+	 *
+	 * @param string $mimetype
+	 * @return array
+	 */
+	public function searchByMime($mimetype) {
+		$results = $this->cache->searchByMime($mimetype);
+		return $this->formatSearchResults($results);
+	}
+
+	/**
+	 * search for files by mimetype
+	 *
+	 * @param string|int $tag name or tag id
+	 * @param string $userId owner of the tags
+	 * @return array
+	 */
+	public function searchByTag($tag, $userId) {
+		$results = $this->cache->searchByTag($tag, $userId);
+		return $this->formatSearchResults($results);
+	}
+
+	/**
+	 * update the folder size and the size of all parent folders
+	 *
+	 * @param string|boolean $path
+	 * @param array $data (optional) meta data of the folder
+	 */
+	public function correctFolderSize($path, $data = null) {
+		if ($this->cache instanceof Cache) {
+			$this->cache->correctFolderSize($this->getSourcePath($path), $data);
+		}
+	}
+
+	/**
+	 * get the size of a folder and set it in the cache
+	 *
+	 * @param string $path
+	 * @param array $entry (optional) meta data of the folder
+	 * @return int
+	 */
+	public function calculateFolderSize($path, $entry = null) {
+		if ($this->cache instanceof Cache) {
+			return $this->cache->calculateFolderSize($this->getSourcePath($path), $entry);
+		} else {
+			return 0;
+		}
+
+	}
+
+	/**
+	 * get all file ids on the files on the storage
+	 *
+	 * @return int[]
+	 */
+	public function getAll() {
+		// not supported
+		return array();
+	}
+
+	/**
+	 * find a folder in the cache which has not been fully scanned
+	 *
+	 * If multiply incomplete folders are in the cache, the one with the highest id will be returned,
+	 * use the one with the highest id gives the best result with the background scanner, since that is most
+	 * likely the folder where we stopped scanning previously
+	 *
+	 * @return string|bool the path of the folder or false when no folder matched
+	 */
+	public function getIncomplete() {
+		// not supported
+		return false;
+	}
+
+	/**
+	 * get the path of a file on this storage by it's id
+	 *
+	 * @param int $id
+	 * @return string|null
+	 */
+	public function getPathById($id) {
+		$path = $this->cache->getPathById($id);
+		return $this->getJailedPath($path);
+	}
+
+	/**
+	 * Move a file or folder in the cache
+	 *
+	 * Note that this should make sure the entries are removed from the source cache
+	 *
+	 * @param \OCP\Files\Cache\ICache $sourceCache
+	 * @param string $sourcePath
+	 * @param string $targetPath
+	 */
+	public function moveFromCache(\OCP\Files\Cache\ICache $sourceCache, $sourcePath, $targetPath) {
+		if ($sourceCache === $this) {
+			return $this->move($sourcePath, $targetPath);
+		}
+		return $this->cache->moveFromCache($sourceCache, $sourcePath, $targetPath);
+	}
+}