From f9ed48eab93884b3b76ecd254d7c79a716bbcf24 Mon Sep 17 00:00:00 2001
From: Côme Chilliet <come.chilliet@nextcloud.com>
Date: Thu, 20 Jul 2023 16:44:25 +0200
Subject: Add check-group command
MIME-Version: 1.0
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Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>
---
 apps/user_ldap/lib/Command/CheckGroup.php | 142 ++++++++++++++++++++++++++++++
 1 file changed, 142 insertions(+)
 create mode 100644 apps/user_ldap/lib/Command/CheckGroup.php

(limited to 'apps/user_ldap/lib/Command')

diff --git a/apps/user_ldap/lib/Command/CheckGroup.php b/apps/user_ldap/lib/Command/CheckGroup.php
new file mode 100644
index 00000000000..8617b06c57f
--- /dev/null
+++ b/apps/user_ldap/lib/Command/CheckGroup.php
@@ -0,0 +1,142 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ *
+ * @author Arthur Schiwon <blizzz@arthur-schiwon.de>
+ * @author Christoph Wurst <christoph@winzerhof-wurst.at>
+ * @author Côme Chilliet <come.chilliet@nextcloud.com>
+ * @author Joas Schilling <coding@schilljs.com>
+ * @author Morris Jobke <hey@morrisjobke.de>
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @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 OCA\User_LDAP\Command;
+
+use OCA\User_LDAP\Helper;
+use OCA\User_LDAP\Mapping\GroupMapping;
+use OCA\User_LDAP\Group_Proxy;
+use OCA\User_LDAP\Service\UpdateGroupsService;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+
+class CheckGroup extends Command {
+	public function __construct(
+		private UpdateGroupsService $service,
+		protected Group_Proxy $backend,
+		protected Helper $helper,
+		protected GroupMapping $mapping,
+	) {
+		parent::__construct();
+	}
+
+	protected function configure(): void {
+		$this
+			->setName('ldap:check-group')
+			->setDescription('checks whether a group exists on LDAP.')
+			->addArgument(
+				'ocName',
+				InputArgument::REQUIRED,
+				'the group name as used in Nextcloud, or the LDAP DN'
+			)
+			->addOption(
+				'force',
+				null,
+				InputOption::VALUE_NONE,
+				'ignores disabled LDAP configuration'
+			)
+			->addOption(
+				'update',
+				null,
+				InputOption::VALUE_NONE,
+				'syncs values from LDAP'
+			)
+		;
+	}
+
+	protected function execute(InputInterface $input, OutputInterface $output): int {
+		try {
+			$this->assertAllowed($input->getOption('force'));
+			$gid = $input->getArgument('ocName');
+			if ($this->backend->getLDAPAccess($gid)->stringResemblesDN($gid)) {
+				$groupname = $this->backend->dn2GroupName($gid);
+				if ($groupname !== false) {
+					$gid = $groupname;
+				}
+			}
+			$wasMapped = $this->groupWasMapped($gid);
+			$exists = $this->backend->groupExistsOnLDAP($gid, true);
+			if ($exists === true) {
+				$output->writeln('The group is still available on LDAP.');
+				if ($input->getOption('update')) {
+					$this->updateGroup($gid, $output, $wasMapped);
+				}
+				return 0;
+			} elseif ($wasMapped) {
+				$output->writeln('The group does not exists on LDAP anymore.');
+				return 0;
+			} else {
+				throw new \Exception('The given group is not a recognized LDAP group.');
+			}
+		} catch (\Exception $e) {
+			$output->writeln('<error>' . $e->getMessage(). '</error>');
+			return 1;
+		}
+	}
+
+	/**
+	 * checks whether a group is actually mapped
+	 * @param string $ocName the groupname as used in Nextcloud
+	 */
+	protected function groupWasMapped(string $ocName): bool {
+		$dn = $this->mapping->getDNByName($ocName);
+		return $dn !== false;
+	}
+
+	/**
+	 * checks whether the setup allows reliable checking of LDAP group existence
+	 * @throws \Exception
+	 */
+	protected function assertAllowed(bool $force): void {
+		if ($this->helper->haveDisabledConfigurations() && !$force) {
+			throw new \Exception('Cannot check group existence, because '
+				. 'disabled LDAP configurations are present.');
+		}
+
+		// we don't check ldapUserCleanupInterval from config.php because this
+		// action is triggered manually, while the setting only controls the
+		// background job.
+	}
+
+	private function updateGroup(string $gid, OutputInterface $output, bool $wasMapped): void {
+		try {
+			if ($wasMapped) {
+				$this->service->handleKnownGroups([$gid]);
+			} else {
+				$this->service->handleCreatedGroups([$gid]);
+			}
+		} catch (\Exception $e) {
+			$output->writeln('<error>Error while trying to lookup and update attributes from LDAP</error>');
+		}
+	}
+}
-- 
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