migration to nextcloud app v3.0.0

Signed-off-by: Biermair Martin <martin.biermair@wimbergerhaus.at>

lib/WebDavAuth.php

@@ -0,0 +1,51 @@
+<?php
+/**
+ * Copyright (c) 2015 Thomas Müller <thomas.mueller@tmit.eu>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+namespace OCA\UserExternal;
+
+class WebDavAuth extends Base {
+
+	private $webDavAuthUrl;
+
+	public function __construct($webDavAuthUrl) {
+		parent::__construct($webDavAuthUrl);
+		$this->webDavAuthUrl =$webDavAuthUrl;
+	}
+
+	/**
+	 * Check if the password is correct without logging in the user
+	 *
+	 * @param string $uid      The username
+	 * @param string $password The password
+	 *
+	 * @return true/false
+	 */
+	public function checkPassword($uid, $password) {
+		$arr = explode('://', $this->webDavAuthUrl, 2);
+		if( ! isset($arr) OR count($arr) !== 2) {
+			\OC::$server->getLogger()->error('ERROR: Invalid WebdavUrl: "'.$this->webDavAuthUrl.'" ', ['app' => 'user_external']);
+			return false;
+		}
+		list($protocol, $path) = $arr;
+		$url= $protocol.'://'.urlencode($uid).':'.urlencode($password).'@'.$path;
+		$headers = get_headers($url);
+		if($headers === false) {
+			\OC::$server->getLogger()->error('ERROR: Not possible to connect to WebDAV Url: "'.$protocol.'://'.$path.'" ', ['app' => 'user_external']);
+			return false;
+
+		}
+		$returnCode= substr($headers[0], 9, 3);
+
+		if(substr($returnCode, 0, 1) === '2') {
+			$this->storeUser($uid);
+			return $uid;
+		} else {
+			return false;
+		}
+	}
+}