From dbe316f3c5b27f15f34ac8534f47dae491ef8e6b Mon Sep 17 00:00:00 2001
From: Roeland Jago Douma <rullzer@owncloud.com>
Date: Thu, 21 Apr 2016 19:22:58 +0200
Subject: Move \OC\Repair to PSR-4

---
 lib/private/Repair/RepairInvalidShares.php | 121 +++++++++++++++++++++++++++++
 1 file changed, 121 insertions(+)
 create mode 100644 lib/private/Repair/RepairInvalidShares.php

(limited to 'lib/private/Repair/RepairInvalidShares.php')

diff --git a/lib/private/Repair/RepairInvalidShares.php b/lib/private/Repair/RepairInvalidShares.php
new file mode 100644
index 00000000000..beef5e37798
--- /dev/null
+++ b/lib/private/Repair/RepairInvalidShares.php
@@ -0,0 +1,121 @@
+<?php
+/**
+ * @author Joas Schilling <nickvergessen@owncloud.com>
+ * @author Morris Jobke <hey@morrisjobke.de>
+ * @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\Repair;
+
+use OC\Hooks\BasicEmitter;
+
+/**
+ * Repairs shares with invalid data
+ */
+class RepairInvalidShares extends BasicEmitter implements \OC\RepairStep {
+
+	const CHUNK_SIZE = 200;
+
+	/**
+	 * @var \OCP\IConfig
+	 */
+	protected $config;
+
+	/**
+	 * @var \OCP\IDBConnection
+	 */
+	protected $connection;
+
+	/**
+	 * @param \OCP\IConfig $config
+	 * @param \OCP\IDBConnection $connection
+	 */
+	public function __construct($config, $connection) {
+		$this->connection = $connection;
+		$this->config = $config;
+	}
+
+	public function getName() {
+		return 'Repair invalid shares';
+	}
+
+	/**
+	 * Past bugs would make it possible to set an expiration date on user shares even
+	 * though it is not supported. This functions removes the expiration date from such entries.
+	 */
+	private function removeExpirationDateFromNonLinkShares() {
+		$builder = $this->connection->getQueryBuilder();
+		$builder
+			->update('share')
+			->set('expiration', 'null')
+			->where($builder->expr()->isNotNull('expiration'))
+			->andWhere($builder->expr()->neq('share_type', $builder->expr()->literal(\OC\Share\Constants::SHARE_TYPE_LINK)));
+
+		$updatedEntries = $builder->execute();
+		if ($updatedEntries > 0) {
+			$this->emit('\OC\Repair', 'info', array('Removed invalid expiration date from ' . $updatedEntries . ' shares'));
+		}
+	}
+
+	/**
+	 * Remove shares where the parent share does not exist anymore
+	 */
+	private function removeSharesNonExistingParent() {
+		$deletedEntries = 0;
+
+		$query = $this->connection->getQueryBuilder();
+		$query->select('s1.parent')
+			->from('share', 's1')
+			->where($query->expr()->isNotNull('s1.parent'))
+				->andWhere($query->expr()->isNull('s2.id'))
+			->leftJoin('s1', 'share', 's2', $query->expr()->eq('s1.parent', 's2.id'))
+			->groupBy('s1.parent')
+			->setMaxResults(self::CHUNK_SIZE);
+
+		$deleteQuery = $this->connection->getQueryBuilder();
+		$deleteQuery->delete('share')
+			->where($deleteQuery->expr()->eq('parent', $deleteQuery->createParameter('parent')));
+
+		$deletedInLastChunk = self::CHUNK_SIZE;
+		while ($deletedInLastChunk === self::CHUNK_SIZE) {
+			$deletedInLastChunk = 0;
+			$result = $query->execute();
+			while ($row = $result->fetch()) {
+				$deletedInLastChunk++;
+				$deletedEntries += $deleteQuery->setParameter('parent', (int) $row['parent'])
+					->execute();
+			}
+			$result->closeCursor();
+		}
+
+		if ($deletedEntries) {
+			$this->emit('\OC\Repair', 'info', array('Removed ' . $deletedEntries . ' shares where the parent did not exist'));
+		}
+	}
+
+	public function run() {
+		$ocVersionFromBeforeUpdate = $this->config->getSystemValue('version', '0.0.0');
+		if (version_compare($ocVersionFromBeforeUpdate, '8.2.0.7', '<')) {
+			// this situation was only possible before 8.2
+			$this->removeExpirationDateFromNonLinkShares();
+		}
+
+		$this->removeSharesNonExistingParent();
+	}
+}
-- 
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