feat: Rotate internal log file

Decided to rotate instead of truncate for future use with possible feature that also supports reading the rotated log file.

Signed-off-by: Ferdinand Thiessen <[email protected]>

Author: susnux

lib/BackgroundJobs/Rotate.php

@@ -0,0 +1,71 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2018 Arthur Schiwon <[email protected]>
+ *
+ * @author Arthur Schiwon <[email protected]>
+ * @author Christoph Wurst <[email protected]>
+ * @author Roeland Jago Douma <[email protected]>
+ *
+ * @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\LogReader\BackgroundJobs;
+
+use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\BackgroundJob\TimedJob;
+use OCP\Files\IAppData;
+use OCP\Files\NotFoundException;
+use OCP\IConfig;
+
+class Rotate extends TimedJob {
+
+	public function __construct(
+		ITimeFactory $time,
+		private IConfig $config,
+		private IAppData $appData,
+	) {
+		parent::__construct($time);
+
+		$this->setInterval(60 * 60 * 3);
+	}
+
+	protected function run($argument): void {
+		try {
+			$folder = $this->appData->getFolder('logreader');
+			$file = $folder->getFile('nextcloud.log');
+		} catch (NotFoundException $e) {
+			// Nothing to do if there is no log
+			return;
+		}
+
+		$maxSize = $this->config->getSystemValue('log_rotate_size', 100 * 1024 * 1024);
+		if ($file->getSize() < $maxSize) {
+			// nothing to do
+			return;
+		}
+
+		if ($folder->fileExists('nextcloud.1.log')) {
+			$rotatedFile = $folder->getFile('nextcloud.1.log');
+		} else {
+			$rotatedFile = $folder->newFile('nextcloud.1.log');
+		}
+		$rotatedFile->putContent($file->getContent());
+		$file->putContent('');
+	}
+}