Add repair step for invalid paths

Signed-off-by: Robin Appelman <robin@icewind.nl>

2 files changed, 125 insertions, 2 deletions

diff --git a/lib/private/Repair.php b/lib/private/Repair.php
index 4d14bf2550c..ca8dbd98758 100644
--- a/lib/private/Repair.php
+++ b/lib/private/Repair.php
@@ -42,6 +42,7 @@ use OC\Repair\NC12\UpdateLanguageCodes;
 use OC\Repair\OldGroupMembershipShares;
 use OC\Repair\Owncloud\SaveAccountsTableData;
 use OC\Repair\RemoveRootShares;
+use OC\Repair\RepairInvalidPaths;
 use OC\Repair\SqliteAutoincrement;
 use OC\Repair\RepairMimeTypes;
 use OC\Repair\RepairInvalidShares;
@@ -143,7 +144,8 @@ class Repair implements IOutput{
 				\OC::$server->query(BundleFetcher::class),
 				\OC::$server->getConfig(),
 				\OC::$server->query(Installer::class)
-			)
+			),
+			new RepairInvalidPaths(\OC::$server->getDatabaseConnection())
 		];
 	}
 
@@ -155,7 +157,7 @@ class Repair implements IOutput{
 	 */
 	public static function getExpensiveRepairSteps() {
 		return [
-			new OldGroupMembershipShares(\OC::$server->getDatabaseConnection(), \OC::$server->getGroupManager()),
+			new OldGroupMembershipShares(\OC::$server->getDatabaseConnection(), \OC::$server->getGroupManager())
 		];
 	}
 
diff --git a/lib/private/Repair/RepairInvalidPaths.php b/lib/private/Repair/RepairInvalidPaths.php
new file mode 100644
index 00000000000..cdd0906295f
--- /dev/null
+++ b/lib/private/Repair/RepairInvalidPaths.php
@@ -0,0 +1,121 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * 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
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OC\Repair;
+
+
+use OCP\IDBConnection;
+use OCP\Migration\IOutput;
+use OCP\Migration\IRepairStep;
+
+class RepairInvalidPaths implements IRepairStep {
+	/** @var IDBConnection */
+	private $connection;
+
+	public function __construct(IDBConnection $connection) {
+		$this->connection = $connection;
+	}
+
+
+	public function getName() {
+		return 'Repair invalid paths in file cache';
+	}
+
+	private function getInvalidEntries() {
+		$builder = $this->connection->getQueryBuilder();
+
+		$computedPath = $builder->func()->concat(
+			'p.path',
+			$builder->func()->concat($builder->createNamedParameter('/'), 'f.name')
+		);
+
+		//select f.path, f.parent,p.path from oc_filecache f inner join oc_filecache p on f.parent=p.fileid and p.path!='' where f.path != p.path || '/' || f.name;
+		$query = $builder->select('f.fileid', 'f.path', 'p.path AS parent_path', 'f.name', 'f.parent', 'f.storage')
+			->from('filecache', 'f')
+			->innerJoin('f', 'filecache', 'p', $builder->expr()->andX(
+				$builder->expr()->eq('f.parent', 'p.fileid'),
+				$builder->expr()->neq('p.name', $builder->createNamedParameter(''))
+			))
+			->where($builder->expr()->neq('f.path', $computedPath));
+
+		return $query->execute()->fetchAll();
+	}
+
+	private function getId($storage, $path) {
+		$builder = $this->connection->getQueryBuilder();
+
+		$query = $builder->select('fileid')
+			->from('filecache')
+			->where($builder->expr()->eq('storage', $builder->createNamedParameter($storage)))
+			->andWhere($builder->expr()->eq('path', $builder->createNamedParameter($path)));
+
+		return $query->execute()->fetchColumn();
+	}
+
+	private function update($fileid, $newPath) {
+		$builder = $this->connection->getQueryBuilder();
+
+		$query = $builder->update('filecache')
+			->set('path', $builder->createNamedParameter($newPath))
+			->set('path_hash', $builder->createNamedParameter(md5($newPath)))
+			->where($builder->expr()->eq('fileid', $builder->createNamedParameter($fileid)));
+
+		$query->execute();
+	}
+
+	private function reparent($from, $to) {
+		$builder = $this->connection->getQueryBuilder();
+
+		$query = $builder->update('filecache')
+			->set('parent', $builder->createNamedParameter($to))
+			->where($builder->expr()->eq('fileid', $builder->createNamedParameter($from)));
+		$query->execute();
+	}
+
+	private function delete($fileid) {
+		$builder = $this->connection->getQueryBuilder();
+
+		$query = $builder->delete('filecache')
+			->where($builder->expr()->eq('fileid', $builder->createNamedParameter($fileid)));
+		$query->execute();
+	}
+
+	private function repair() {
+		$entries = $this->getInvalidEntries();
+		foreach ($entries as $entry) {
+			$calculatedPath = $entry['parent_path'] . '/' . $entry['name'];
+			if ($newId = $this->getId($entry['storage'], $calculatedPath)) {
+				// a new entry with the correct path has already been created, reuse that one and delete the incorrect entry
+				$this->reparent($entry['fileid'], $newId);
+				$this->delete($entry['fileid']);
+			} else {
+				$this->update($entry['fileid'], $calculatedPath);
+			}
+		}
+		return count($entries);
+	}
+
+	public function run(IOutput $output) {
+		$count = $this->repair();
+
+		$output->info('Repaired ' . $count . ' paths');
+	}
+}