1 files changed, 77 insertions, 0 deletions
diff --git a/ncp-previewgenerator/lib/Watcher.php b/ncp-previewgenerator/lib/Watcher.php
new file mode 100644
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--- /dev/null
+++ b/ncp-previewgenerator/lib/Watcher.php
@@ -0,0 +1,77 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2016, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.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 OCA\PreviewGenerator;
+
+use OCP\Files\Folder;
+use OCP\Files\Node;
+use OCP\IDBConnection;
+use OCP\IUserManager;
+
+class Watcher {
+
+	/** @var IDBConnection */
+	private $connection;
+
+	/** @var IUserManager */
+	private $userManager;
+
+	public function __construct(IDBConnection $connection,
+								IUserManager $userManager) {
+		$this->connection = $connection;
+		$this->userManager = $userManager;
+	}
+
+	public function postWrite(Node $node) {
+		$absPath = ltrim($node->getPath(), '/');
+		$owner = explode('/', $absPath)[0];
+
+		if ($node instanceof Folder || !$this->userManager->userExists($owner)) {
+			return;
+		}
+
+		$qb = $this->connection->getQueryBuilder();
+		$qb->select('id')
+			->from('preview_generation')
+			->where(
+				$qb->expr()->andX(
+					$qb->expr()->eq('uid', $qb->createNamedParameter($owner)),
+					$qb->expr()->eq('file_id', $qb->createNamedParameter($node->getId()))
+				)
+			)->setMaxResults(1);
+		$cursor = $qb->execute();
+		$inTable = $cursor->fetch() !== false;
+		$cursor->closeCursor();
+
+		// Don't insert if there is already such an entry
+		if ($inTable) {
+			return;
+		}
+
+		$qb = $this->connection->getQueryBuilder();
+		$qb->insert('preview_generation')
+			->setValue('uid', $qb->createNamedParameter($owner))
+			->setValue('file_id', $qb->createNamedParameter($node->getId()));
+		$qb->execute();
+	}
+}