1 files changed, 232 insertions, 0 deletions
diff --git a/lib/private/files/config/usermountcache.php b/lib/private/files/config/usermountcache.php
new file mode 100644
index 00000000000..e3a494e93a1
--- /dev/null
+++ b/lib/private/files/config/usermountcache.php
@@ -0,0 +1,232 @@
+<?php
+/**
+ * @author Robin Appelman <icewind@owncloud.com>
+ *
+ * @copyright Copyright (c) 2015, 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\Config;
+
+use Doctrine\DBAL\Exception\UniqueConstraintViolationException;
+use OCP\Files\Config\ICachedMountInfo;
+use OCP\Files\Config\IUserMountCache;
+use OCP\Files\Mount\IMountPoint;
+use OCP\ICache;
+use OCP\IDBConnection;
+use OCP\ILogger;
+use OCP\IUser;
+use OCP\IUserManager;
+
+/**
+ * Cache mounts points per user in the cache so we can easilly look them up
+ */
+class UserMountCache implements IUserMountCache {
+	/**
+	 * @var IDBConnection
+	 */
+	private $connection;
+
+	/**
+	 * @var IUserManager
+	 */
+	private $userManager;
+
+	/** @var ICachedMountInfo[][] [$userId => [$cachedMountInfo, ....], ...] */
+	private $mountsForUsers = [];
+
+	/**
+	 * @var ILogger
+	 */
+	private $logger;
+
+	/**
+	 * UserMountCache constructor.
+	 *
+	 * @param IDBConnection $connection
+	 * @param IUserManager $userManager
+	 * @param ILogger $logger
+	 */
+	public function __construct(IDBConnection $connection, IUserManager $userManager, ILogger $logger) {
+		$this->connection = $connection;
+		$this->userManager = $userManager;
+		$this->logger = $logger;
+	}
+
+	public function registerMounts(IUser $user, array $mounts) {
+		// filter out non-proper storages coming from unit tests
+		$mounts = array_filter($mounts, function (IMountPoint $mount) {
+			return $mount->getStorage()->getCache();
+		});
+		/** @var ICachedMountInfo[] $newMounts */
+		$newMounts = array_map(function (IMountPoint $mount) use ($user) {
+			$storage = $mount->getStorage();
+			$rootId = (int)$storage->getCache()->getId('');
+			$storageId = (int)$storage->getStorageCache()->getNumericId();
+			// filter out any storages which aren't scanned yet since we aren't interested in files from those storages (yet)
+			if ($rootId === -1) {
+				return null;
+			} else {
+				return new CachedMountInfo($user, $storageId, $rootId, $mount->getMountPoint());
+			}
+		}, $mounts);
+		$newMounts = array_values(array_filter($newMounts));
+
+		$cachedMounts = $this->getMountsForUser($user);
+		$mountDiff = function (ICachedMountInfo $mount1, ICachedMountInfo $mount2) {
+			// since we are only looking for mounts for a specific user comparing on root id is enough
+			return $mount1->getRootId() - $mount2->getRootId();
+		};
+
+		/** @var ICachedMountInfo[] $addedMounts */
+		$addedMounts = array_udiff($newMounts, $cachedMounts, $mountDiff);
+		/** @var ICachedMountInfo[] $removedMounts */
+		$removedMounts = array_udiff($cachedMounts, $newMounts, $mountDiff);
+
+		$changedMounts = array_uintersect($newMounts, $cachedMounts, function (ICachedMountInfo $mount1, ICachedMountInfo $mount2) {
+			// filter mounts with the same root id and different mountpoints
+			if ($mount1->getRootId() !== $mount2->getRootId()) {
+				return -1;
+			}
+			return ($mount1->getMountPoint() !== $mount2->getMountPoint()) ? 0 : 1;
+		});
+
+		foreach ($addedMounts as $mount) {
+			$this->addToCache($mount);
+			$this->mountsForUsers[$user->getUID()][] = $mount;
+		}
+		foreach ($removedMounts as $mount) {
+			$this->removeFromCache($mount);
+			$index = array_search($mount, $this->mountsForUsers[$user->getUID()]);
+			unset($this->mountsForUsers[$user->getUID()][$index]);
+		}
+		foreach ($changedMounts as $mount) {
+			$this->setMountPoint($mount);
+		}
+	}
+
+	private function addToCache(ICachedMountInfo $mount) {
+		$this->connection->insertIfNotExist('*PREFIX*mounts', [
+			'storage_id' => $mount->getStorageId(),
+			'root_id' => $mount->getRootId(),
+			'user_id' => $mount->getUser()->getUID(),
+			'mount_point' => $mount->getMountPoint()
+		]);
+	}
+
+	private function setMountPoint(ICachedMountInfo $mount) {
+		$builder = $this->connection->getQueryBuilder();
+
+		$query = $builder->update('mounts')
+			->set('mount_point', $builder->createNamedParameter($mount->getMountPoint()))
+			->where($builder->expr()->eq('user_id', $builder->createNamedParameter($mount->getUser()->getUID())))
+			->andWhere($builder->expr()->eq('root_id', $builder->createNamedParameter($mount->getRootId(), \PDO::PARAM_INT)));
+
+		$query->execute();
+	}
+
+	private function removeFromCache(ICachedMountInfo $mount) {
+		$builder = $this->connection->getQueryBuilder();
+
+		$query = $builder->delete('mounts')
+			->where($builder->expr()->eq('user_id', $builder->createNamedParameter($mount->getUser()->getUID())))
+			->andWhere($builder->expr()->eq('root_id', $builder->createNamedParameter($mount->getRootId(), \PDO::PARAM_INT)));
+		$query->execute();
+	}
+
+	private function dbRowToMountInfo(array $row) {
+		$user = $this->userManager->get($row['user_id']);
+		return new CachedMountInfo($user, (int)$row['storage_id'], (int)$row['root_id'], $row['mount_point']);
+	}
+
+	/**
+	 * @param IUser $user
+	 * @return ICachedMountInfo[]
+	 */
+	public function getMountsForUser(IUser $user) {
+		if (!isset($this->mountsForUsers[$user->getUID()])) {
+			$builder = $this->connection->getQueryBuilder();
+			$query = $builder->select('storage_id', 'root_id', 'user_id', 'mount_point')
+				->from('mounts')
+				->where($builder->expr()->eq('user_id', $builder->createPositionalParameter($user->getUID())));
+
+			$rows = $query->execute()->fetchAll();
+
+			$this->mountsForUsers[$user->getUID()] = array_map([$this, 'dbRowToMountInfo'], $rows);
+		}
+		return $this->mountsForUsers[$user->getUID()];
+	}
+
+	/**
+	 * @param int $numericStorageId
+	 * @return CachedMountInfo[]
+	 */
+	public function getMountsForStorageId($numericStorageId) {
+		$builder = $this->connection->getQueryBuilder();
+		$query = $builder->select('storage_id', 'root_id', 'user_id', 'mount_point')
+			->from('mounts')
+			->where($builder->expr()->eq('storage_id', $builder->createPositionalParameter($numericStorageId, \PDO::PARAM_INT)));
+
+		$rows = $query->execute()->fetchAll();
+
+		return array_map([$this, 'dbRowToMountInfo'], $rows);
+	}
+
+	/**
+	 * @param int $rootFileId
+	 * @return CachedMountInfo[]
+	 */
+	public function getMountsForRootId($rootFileId) {
+		$builder = $this->connection->getQueryBuilder();
+		$query = $builder->select('storage_id', 'root_id', 'user_id', 'mount_point')
+			->from('mounts')
+			->where($builder->expr()->eq('root_id', $builder->createPositionalParameter($rootFileId, \PDO::PARAM_INT)));
+
+		$rows = $query->execute()->fetchAll();
+
+		return array_map([$this, 'dbRowToMountInfo'], $rows);
+	}
+
+	/**
+	 * Remove all cached mounts for a user
+	 *
+	 * @param IUser $user
+	 */
+	public function removeUserMounts(IUser $user) {
+		$builder = $this->connection->getQueryBuilder();
+
+		$query = $builder->delete('mounts')
+			->where($builder->expr()->eq('user_id', $builder->createNamedParameter($user->getUID())));
+		$query->execute();
+	}
+
+	public function removeUserStorageMount($storageId, $userId) {
+		$builder = $this->connection->getQueryBuilder();
+
+		$query = $builder->delete('mounts')
+			->where($builder->expr()->eq('user_id', $builder->createNamedParameter($userId)))
+			->andWhere($builder->expr()->eq('storage_id', $builder->createNamedParameter($storageId, \PDO::PARAM_INT)));
+		$query->execute();
+	}
+
+	public function remoteStorageMounts($storageId) {
+		$builder = $this->connection->getQueryBuilder();
+
+		$query = $builder->delete('mounts')
+			->where($builder->expr()->eq('storage_id', $builder->createNamedParameter($storageId, \PDO::PARAM_INT)));
+		$query->execute();
+	}
+}