1 files changed, 70 insertions, 0 deletions
diff --git a/apps/files_external/lib/Lib/LegacyDependencyCheckPolyfill.php b/apps/files_external/lib/Lib/LegacyDependencyCheckPolyfill.php
new file mode 100644
index 00000000000..7d6c0c4b45b
--- /dev/null
+++ b/apps/files_external/lib/Lib/LegacyDependencyCheckPolyfill.php
@@ -0,0 +1,70 @@
+<?php
+/**
+ * @author Robin McCorkell <robin@mccorkell.me.uk>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @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\Files_External\Lib;
+
+use \OCA\Files_External\Lib\MissingDependency;
+
+/**
+ * Polyfill for checking dependencies using legacy Storage::checkDependencies()
+ */
+trait LegacyDependencyCheckPolyfill {
+
+	/**
+	 * @return string
+	 */
+	abstract public function getStorageClass();
+
+	/**
+	 * Check if object is valid for use
+	 *
+	 * @return MissingDependency[] Unsatisfied dependencies
+	 */
+	public function checkDependencies() {
+		$ret = [];
+
+		$result = call_user_func([$this->getStorageClass(), 'checkDependencies']);
+		if ($result !== true) {
+			if (!is_array($result)) {
+				$result = [$result];
+			}
+			foreach ($result as $key => $value) {
+				if (!($value instanceof MissingDependency)) {
+					$module = null;
+					$message = null;
+					if (is_numeric($key)) {
+						$module = $value;
+					} else {
+						$module = $key;
+						$message = $value;
+					}
+					$value = new MissingDependency($module, $this);
+					$value->setMessage($message);
+				}
+				$ret[] = $value;
+			}
+		}
+
+		return $ret;
+	}
+
+}
+