add LDAP ConfigHandler for external storages and "$home" var

* handler registered upon OCA\\Files_External::loadAdditionalBackends
  event as user_ldap is loaded before files_external
* new configuration field "ldapExtStorageHomeAttribute" (not in GUI yet)

Signed-off-by: Arthur Schiwon <blizzz@arthur-schiwon.de>

1 files changed, 74 insertions, 0 deletions

diff --git a/apps/user_ldap/lib/Handler/ExtStorageConfigHandler.php b/apps/user_ldap/lib/Handler/ExtStorageConfigHandler.php
new file mode 100644
index 00000000000..98a3cc71263
--- /dev/null
+++ b/apps/user_ldap/lib/Handler/ExtStorageConfigHandler.php
@@ -0,0 +1,74 @@
+<?php
+/**
+ * @copyright Copyright (c) 2019 Arthur Schiwon <blizzz@arthur-schiwon.de>
+ *
+ * @author Arthur Schiwon <blizzz@arthur-schiwon.de>
+ *
+ * @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\User_LDAP\Handler;
+
+use OCA\Files_External\Config\IConfigHandler;
+use OCA\Files_External\Config\SimpleSubstitutionTrait;
+use OCA\User_LDAP\User_Proxy;
+use OCP\IUserSession;
+
+class ExtStorageConfigHandler implements IConfigHandler {
+	use SimpleSubstitutionTrait;
+
+	/** @var IUserSession */
+	private $session;
+
+	public function __construct(IUserSession $session) {
+		$this->placeholder = 'home';
+		$this->session = $session;
+	}
+
+	/**
+	 * @param mixed $optionValue
+	 * @return mixed the same type as $optionValue
+	 * @since 16.0.0
+	 * @throws \Exception
+	 */
+	public function handle($optionValue) {
+		$user = $this->session->getUser();
+		if($user === null) {
+			return $optionValue;
+		}
+
+		$backend = $user->getBackend();
+		if(!$backend instanceof User_Proxy) {
+			return $optionValue;
+		}
+
+		$access = $backend->getLDAPAccess($user->getUID());
+		if(!$access) {
+			return $optionValue;
+		}
+
+		$attribute = $access->connection->ldapExtStorageHomeAttribute;
+		if(empty($attribute)) {
+			return $optionValue;
+		}
+
+		$ldapUser = $access->userManager->get($user->getUID());
+		$extHome = $ldapUser->getExtStorageHome();
+
+		return $this->processInput($optionValue, $extHome);
+	}
+}