1 files changed, 73 insertions, 0 deletions
diff --git a/apps/dav/lib/Connector/Sabre/MaintenancePlugin.php b/apps/dav/lib/Connector/Sabre/MaintenancePlugin.php
new file mode 100644
index 00000000000..d5ab7f09dfa
--- /dev/null
+++ b/apps/dav/lib/Connector/Sabre/MaintenancePlugin.php
@@ -0,0 +1,73 @@
+<?php
+
+/**
+ * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+namespace OCA\DAV\Connector\Sabre;
+
+use OCA\DAV\Exception\ServerMaintenanceMode;
+use OCP\IConfig;
+use OCP\IL10N;
+use OCP\Util;
+use Sabre\DAV\Exception\ServiceUnavailable;
+use Sabre\DAV\ServerPlugin;
+
+class MaintenancePlugin extends ServerPlugin {
+
+	/** @var IL10N */
+	private $l10n;
+
+	/**
+	 * Reference to main server object
+	 *
+	 * @var Server
+	 */
+	private $server;
+
+	/**
+	 * @param IConfig $config
+	 */
+	public function __construct(
+		private IConfig $config,
+		IL10N $l10n,
+	) {
+		$this->l10n = \OC::$server->getL10N('dav');
+	}
+
+
+	/**
+	 * This initializes the plugin.
+	 *
+	 * This function is called by \Sabre\DAV\Server, after
+	 * addPlugin is called.
+	 *
+	 * This method should set up the required event subscriptions.
+	 *
+	 * @param \Sabre\DAV\Server $server
+	 * @return void
+	 */
+	public function initialize(\Sabre\DAV\Server $server) {
+		$this->server = $server;
+		$this->server->on('beforeMethod:*', [$this, 'checkMaintenanceMode'], 1);
+	}
+
+	/**
+	 * This method is called before any HTTP method and returns http status code 503
+	 * in case the system is in maintenance mode.
+	 *
+	 * @throws ServiceUnavailable
+	 * @return bool
+	 */
+	public function checkMaintenanceMode() {
+		if ($this->config->getSystemValueBool('maintenance')) {
+			throw new ServerMaintenanceMode($this->l10n->t('System is in maintenance mode.'));
+		}
+		if (Util::needUpgrade()) {
+			throw new ServerMaintenanceMode($this->l10n->t('Upgrade needed'));
+		}
+
+		return true;
+	}
+}