grommunio / grommunio-web

plugins/files/php/Files/Backend/class.backendstore.php

Indentation +164 added lines, -164 removed lines

@@ -7,174 +7,174 @@
 
 // For backward compatibility we must check if the file exists
 if (file_exists(BASE_PATH . 'server/includes/core/class.encryptionstore.php')) {
-	require_once BASE_PATH . 'server/includes/core/class.encryptionstore.php';
+    require_once BASE_PATH . 'server/includes/core/class.encryptionstore.php';
 }
 
 use Files\Core\Util\Logger;
 use Files\Core\Util\StringUtil;
 
 class BackendStore {
-	public const EXTERNAL_BACKEND_PREFIX = "filesbackend"; // folder prefix for external backends
-	private $EXTERNAL_BACKEND_DIR = ""; // path to search for external plugins (should be grommunio-web/plugins)
-	public const BACKEND_DIR = "/"; // path to search for core backends, relative to current path
-	public const LOG_CONTEXT = "BackendStore"; // Context for the Logger
-
-	/**
-	 * Feature variables.
-	 */
-	public const FEATURE_QUOTA = "Quota";
-	public const FEATURE_VERSION = "VersionInfo";
-	public const FEATURE_SHARING = "Sharing";
-	public const FEATURE_STREAMING = "Streaming";
-	public const FEATURE_OAUTH = "OAUTH";
-
-	/**
-	 * @var AbstractBackend
-	 */
-	private $backends = [];
-	protected static $_instance;
-
-	// Make it a singleton
-	private function __construct() {
-		$this->EXTERNAL_BACKEND_DIR = BASE_PATH . PATH_PLUGIN_DIR . "/";
-
-		Logger::debug(self::LOG_CONTEXT, "Searching for external backends in " . $this->EXTERNAL_BACKEND_DIR);
-	}
-
-	/**
-	 * Call this method to get singleton.
-	 *
-	 * @return BackendStore
-	 */
-	public static function getInstance() {
-		if (self::$_instance === null) {
-			self::$_instance = new self();
-			self::$_instance->initialize();
-			self::$_instance->initializeExternal();
-		}
-
-		return self::$_instance;
-	}
-
-	/**
-	 * Search the backend folder for backends and register them.
-	 */
-	public function initialize() {
-		$list = [];    // this hold our plugin folders
-		$workdir = __DIR__ . self::BACKEND_DIR;
-
-		// Populate the list of directories to check against
-		if (($directoryHandle = opendir($workdir)) !== false) {
-			while (($file = readdir($directoryHandle)) !== false) {
-				// Make sure we're not dealing with a file or a link to the parent directory
-				if (is_dir($workdir . $file) && ($file == '.' || $file == '..') !== true) {
-					array_push($list, $file);
-				}
-			}
-		}
-		else {
-			Logger::error(self::LOG_CONTEXT, "Error opening the backend directory: " . $workdir);
-		}
-
-		// Register the backends
-		foreach ($list as $backend) {
-			Logger::debug(self::LOG_CONTEXT, "Registering backend: " . $backend);
-			$this->register($backend);
-		}
-	}
-
-	/**
-	 * Search the backend folder for external backends and register them.
-	 */
-	public function initializeExternal() {
-		$list = [];    // this hold our plugin folders
-		$workdir = $this->EXTERNAL_BACKEND_DIR;
-
-		// Populate the list of directories to check against
-		if (($directoryHandle = opendir($workdir)) !== false) {
-			while (($file = readdir($directoryHandle)) !== false) {
-				// Make sure we're not dealing with a file or a link to the parent directory
-				if (is_dir($workdir . $file) && ($file == '.' || $file == '..') !== true && StringUtil::startsWith($file, self::EXTERNAL_BACKEND_PREFIX)) {
-					$backendName = substr($file, strlen(self::EXTERNAL_BACKEND_PREFIX));
-					array_push($list, $backendName);
-				}
-			}
-		}
-		else {
-			Logger::error(self::LOG_CONTEXT, "Error opening the external backend directory: " . $workdir);
-		}
-
-		// Register the backends
-		foreach ($list as $backend) {
-			Logger::debug(self::LOG_CONTEXT, "Registering external backend: " . $backend);
-			$this->registerExternal($backend);
-		}
-	}
-
-	/**
-	 * Registration adds the backend to the list of plugins, and also
-	 * includes it's code into our runtime.
-	 *
-	 * @param $backend
-	 */
-	private function register($backend) {
-		require_once __DIR__ . self::BACKEND_DIR . $backend . "/class.backend.php";
-		array_push($this->backends, $backend);
-	}
-
-	/**
-	 * Registration adds the external backend to the list of plugins, and also
-	 * includes it's code into our runtime.
-	 *
-	 * @param $backend
-	 */
-	private function registerExternal($backend) {
-		require_once $this->EXTERNAL_BACKEND_DIR . self::EXTERNAL_BACKEND_PREFIX . $backend . "/php/class.backend.php";
-		array_push($this->backends, $backend);
-	}
-
-	/**
-	 * Check if a backend is registered.
-	 *
-	 * @param $backend
-	 *
-	 * @return bool
-	 */
-	public function backendExists($backend) {
-		foreach ($this->backends as $registeredbackend) {
-			if ($backend === $registeredbackend) {
-				return true;
-			}
-		}
-
-		Logger::log(self::LOG_CONTEXT, "Backend does not exist: " . $backend);
-
-		return false;
-	}
-
-	/**
-	 * Creates a new Instance of the given backendtype.
-	 *
-	 * @param $backend
-	 *
-	 * @return AbstractBackend
-	 */
-	public function getInstanceOfBackend($backend) {
-		if ($this->backendExists($backend)) {
-			$class = "\\Files\\Backend\\{$backend}\\Backend";
-
-			return new $class();
-		}
-
-		return false; // return false if the backend does not exist
-	}
-
-	/**
-	 * Return all registered backend internal names.
-	 *
-	 * @return array
-	 */
-	public function getRegisteredBackendNames() {
-		return $this->backends;
-	}
+    public const EXTERNAL_BACKEND_PREFIX = "filesbackend"; // folder prefix for external backends
+    private $EXTERNAL_BACKEND_DIR = ""; // path to search for external plugins (should be grommunio-web/plugins)
+    public const BACKEND_DIR = "/"; // path to search for core backends, relative to current path
+    public const LOG_CONTEXT = "BackendStore"; // Context for the Logger
+
+    /**
+     * Feature variables.
+     */
+    public const FEATURE_QUOTA = "Quota";
+    public const FEATURE_VERSION = "VersionInfo";
+    public const FEATURE_SHARING = "Sharing";
+    public const FEATURE_STREAMING = "Streaming";
+    public const FEATURE_OAUTH = "OAUTH";
+
+    /**
+     * @var AbstractBackend
+     */
+    private $backends = [];
+    protected static $_instance;
+
+    // Make it a singleton
+    private function __construct() {
+        $this->EXTERNAL_BACKEND_DIR = BASE_PATH . PATH_PLUGIN_DIR . "/";
+
+        Logger::debug(self::LOG_CONTEXT, "Searching for external backends in " . $this->EXTERNAL_BACKEND_DIR);
+    }
+
+    /**
+     * Call this method to get singleton.
+     *
+     * @return BackendStore
+     */
+    public static function getInstance() {
+        if (self::$_instance === null) {
+            self::$_instance = new self();
+            self::$_instance->initialize();
+            self::$_instance->initializeExternal();
+        }
+
+        return self::$_instance;
+    }
+
+    /**
+     * Search the backend folder for backends and register them.
+     */
+    public function initialize() {
+        $list = [];    // this hold our plugin folders
+        $workdir = __DIR__ . self::BACKEND_DIR;
+
+        // Populate the list of directories to check against
+        if (($directoryHandle = opendir($workdir)) !== false) {
+            while (($file = readdir($directoryHandle)) !== false) {
+                // Make sure we're not dealing with a file or a link to the parent directory
+                if (is_dir($workdir . $file) && ($file == '.' || $file == '..') !== true) {
+                    array_push($list, $file);
+                }
+            }
+        }
+        else {
+            Logger::error(self::LOG_CONTEXT, "Error opening the backend directory: " . $workdir);
+        }
+
+        // Register the backends
+        foreach ($list as $backend) {
+            Logger::debug(self::LOG_CONTEXT, "Registering backend: " . $backend);
+            $this->register($backend);
+        }
+    }
+
+    /**
+     * Search the backend folder for external backends and register them.
+     */
+    public function initializeExternal() {
+        $list = [];    // this hold our plugin folders
+        $workdir = $this->EXTERNAL_BACKEND_DIR;
+
+        // Populate the list of directories to check against
+        if (($directoryHandle = opendir($workdir)) !== false) {
+            while (($file = readdir($directoryHandle)) !== false) {
+                // Make sure we're not dealing with a file or a link to the parent directory
+                if (is_dir($workdir . $file) && ($file == '.' || $file == '..') !== true && StringUtil::startsWith($file, self::EXTERNAL_BACKEND_PREFIX)) {
+                    $backendName = substr($file, strlen(self::EXTERNAL_BACKEND_PREFIX));
+                    array_push($list, $backendName);
+                }
+            }
+        }
+        else {
+            Logger::error(self::LOG_CONTEXT, "Error opening the external backend directory: " . $workdir);
+        }
+
+        // Register the backends
+        foreach ($list as $backend) {
+            Logger::debug(self::LOG_CONTEXT, "Registering external backend: " . $backend);
+            $this->registerExternal($backend);
+        }
+    }
+
+    /**
+     * Registration adds the backend to the list of plugins, and also
+     * includes it's code into our runtime.
+     *
+     * @param $backend
+     */
+    private function register($backend) {
+        require_once __DIR__ . self::BACKEND_DIR . $backend . "/class.backend.php";
+        array_push($this->backends, $backend);
+    }
+
+    /**
+     * Registration adds the external backend to the list of plugins, and also
+     * includes it's code into our runtime.
+     *
+     * @param $backend
+     */
+    private function registerExternal($backend) {
+        require_once $this->EXTERNAL_BACKEND_DIR . self::EXTERNAL_BACKEND_PREFIX . $backend . "/php/class.backend.php";
+        array_push($this->backends, $backend);
+    }
+
+    /**
+     * Check if a backend is registered.
+     *
+     * @param $backend
+     *
+     * @return bool
+     */
+    public function backendExists($backend) {
+        foreach ($this->backends as $registeredbackend) {
+            if ($backend === $registeredbackend) {
+                return true;
+            }
+        }
+
+        Logger::log(self::LOG_CONTEXT, "Backend does not exist: " . $backend);
+
+        return false;
+    }
+
+    /**
+     * Creates a new Instance of the given backendtype.
+     *
+     * @param $backend
+     *
+     * @return AbstractBackend
+     */
+    public function getInstanceOfBackend($backend) {
+        if ($this->backendExists($backend)) {
+            $class = "\\Files\\Backend\\{$backend}\\Backend";
+
+            return new $class();
+        }
+
+        return false; // return false if the backend does not exist
+    }
+
+    /**
+     * Return all registered backend internal names.
+     *
+     * @return array
+     */
+    public function getRegisteredBackendNames() {
+        return $this->backends;
+    }
 }

plugins/files/php/Files/Backend/interface.quota.php

Indentation +2 added lines, -2 removed lines

@@ -3,7 +3,7 @@
 namespace Files\Backend;
 
 interface iFeatureQuota {
-	public function getQuotaBytesUsed($dir);
+    public function getQuotaBytesUsed($dir);
 
-	public function getQuotaBytesAvailable($dir);
+    public function getQuotaBytesAvailable($dir);
 }

plugins/files/php/Files/Backend/Webdav/class.backend.php

Indentation +1084 added lines, -1084 removed lines

@@ -21,1088 +21,1088 @@
  * @extends AbstractBackend
  */
 class Backend extends AbstractBackend implements iFeatureQuota, iFeatureVersionInfo {
-	/**
-	 * Error codes
-	 * see @parseErrorCodeToMessage for description.
-	 */
-	public const WD_ERR_UNAUTHORIZED = 401;
-	public const WD_ERR_FORBIDDEN = 403;
-	public const WD_ERR_NOTFOUND = 404;
-	public const WD_ERR_NOTALLOWED = 405;
-	public const WD_ERR_TIMEOUT = 408;
-	public const WD_ERR_LOCKED = 423;
-	public const WD_ERR_FAILED_DEPENDENCY = 423;
-	public const WD_ERR_INTERNAL = 500;
-	public const WD_ERR_UNREACHABLE = 800;
-	public const WD_ERR_TMP = 801;
-	public const WD_ERR_FEATURES = 802;
-	public const WD_ERR_NO_CURL = 803;
-
-	/**
-	 * Configuration data for the extjs metaform.
-	 */
-	protected $formConfig;
-	protected $formFields;
-	protected $metaConfig;
-
-	/**
-	 * @var bool debugging flag, if true, debugging is enabled
-	 */
-	public $debug = false;
-
-	/**
-	 * @var int webdav server port
-	 */
-	public $port = 80;
-
-	/**
-	 * @var string hostname or ip
-	 */
-	public $server = "localhost";
-
-	/**
-	 * @var string global path prefix for all requests
-	 */
-	public $path = "/webdav.php";
-
-	/**
-	 * @var bool if true, ssl is used
-	 */
-	public $ssl = false;
-
-	/**
-	 * @var bool allow self signed certificates
-	 */
-	public $allowselfsigned = true;
-
-	/**
-	 * @var string the username
-	 */
-	public $user = "";
-
-	/**
-	 * @var string the password
-	 */
-	public $pass = "";
-
-	/**
-	 * @var FilesWebDavClient the SabreDAV client object
-	 */
-	public $sabre_client;
-
-	/**
-	 * @constructor
-	 */
-	public function __construct() {
-		// initialization
-		$this->debug = PLUGIN_FILESBROWSER_LOGLEVEL === "DEBUG" ? true : false;
-
-		$this->init_form();
-
-		// set backend description
-		$this->backendDescription = _("With this backend, you can connect to any WebDAV server.");
-
-		// set backend display name
-		$this->backendDisplayName = "Webdav";
-
-		// set backend version
-		// TODO: this should be changed on every release
-		$this->backendVersion = "3.0";
-
-		// Backend name used in translations
-		$this->backendTransName = _('Files WebDAV Backend: ');
-	}
-
-	/**
-	 * Initialise form fields.
-	 */
-	private function init_form() {
-		$this->formConfig = [
-			"labelAlign" => "left",
-			"columnCount" => 1,
-			"labelWidth" => 80,
-			"defaults" => [
-				"width" => 292,
-			],
-		];
-
-		$this->formFields = [
-			[
-				"name" => "server_address",
-				"fieldLabel" => _('Server address'),
-				"editor" => [
-					"allowBlank" => false,
-				],
-			],
-			[
-				"name" => "server_port",
-				"fieldLabel" => _('Server port'),
-				"editor" => [
-					"ref" => "../../portField",
-					"allowBlank" => false,
-				],
-			],
-			[
-				"name" => "server_ssl",
-				"fieldLabel" => _('Use SSL'),
-				"editor" => [
-					"xtype" => "checkbox",
-					"listeners" => [
-						"check" => "Zarafa.plugins.files.data.Actions.onCheckSSL", // this javascript function will be called!
-					],
-				],
-			],
-			[
-				"name" => "server_path",
-				"fieldLabel" => _('Webdav base path'),
-				"editor" => [
-				],
-			],
-			[
-				"name" => "user",
-				"fieldLabel" => _('Username'),
-				"editor" => [
-					"ref" => "../../usernameField",
-				],
-			],
-			[
-				"name" => "password",
-				"fieldLabel" => _('Password'),
-				"editor" => [
-					"ref" => "../../passwordField",
-					"inputType" => "password",
-				],
-			],
-			[
-				"name" => "use_grommunio_credentials",
-				"fieldLabel" => _('Use grommunio credentials'),
-				"editor" => [
-					"xtype" => "checkbox",
-					"listeners" => [
-						"check" => "Zarafa.plugins.files.data.Actions.onCheckCredentials", // this javascript function will be called!
-					],
-				],
-			],
-		];
-
-		$this->metaConfig = [
-			"success" => true,
-			"metaData" => [
-				"fields" => $this->formFields,
-				"formConfig" => $this->formConfig,
-			],
-			"data" => [ // here we can specify the default values.
-				"server_address" => "files.demo.com",
-				"server_port" => "80",
-				"server_path" => "/remote.php/webdav",
-			],
-		];
-	}
-
-	/**
-	 * Initialize backend from $backend_config array.
-	 *
-	 * @param $backend_config
-	 */
-	public function init_backend($backend_config) {
-		$this->set_server($backend_config["server_address"]);
-		$this->set_port($backend_config["server_port"]);
-		$this->set_base($backend_config["server_path"]);
-		$this->set_ssl($backend_config["server_ssl"]);
-
-		// set user and password
-		if ($backend_config["use_grommunio_credentials"] === false) {
-			$this->set_user($backend_config["user"]);
-			$this->set_pass($backend_config["password"]);
-		}
-		else {
-			// For backward compatibility we will check if the Encryption store exists. If not,
-			// we will fall back to the old way of retrieving the password from the session.
-			if (class_exists('EncryptionStore')) {
-				// Get the username and password from the Encryption store
-				$encryptionStore = \EncryptionStore::getInstance();
-				$this->set_user($encryptionStore->get('username'));
-				$this->set_pass($encryptionStore->get('password'));
-			}
-			else {
-				$this->set_user($GLOBALS['mapisession']->getUserName());
-				$password = $_SESSION['password'];
-				if (function_exists('openssl_decrypt')) {
-					$this->set_pass(openssl_decrypt($password, "des-ede3-cbc", PASSWORD_KEY, 0, PASSWORD_IV));
-				}
-			}
-		}
-	}
-
-	/**
-	 * Set webdav server. FQN or IP address.
-	 *
-	 * @param string $server hostname or ip of the ftp server
-	 */
-	public function set_server($server) {
-		$this->server = $server;
-	}
-
-	/**
-	 * Set base path.
-	 *
-	 * @param string $pp the global path prefix
-	 */
-	public function set_base($pp) {
-		$this->path = $pp;
-		$this->log('Base path set to ' . $this->path);
-	}
-
-	/**
-	 * Set ssl.
-	 *
-	 * @param int /bool $ssl (1 = true, 0 = false)
-	 */
-	public function set_ssl($ssl) {
-		$this->ssl = $ssl ? true : false;
-		$this->log('SSL extension was set to ' . $this->ssl);
-	}
-
-	/**
-	 * Allow self signed certificates - unimplemented.
-	 *
-	 * @param bool $allowselfsigned Allow self signed certificates. Not yet implemented.
-	 */
-	public function set_selfsigned($allowselfsigned) {
-		$this->allowselfsigned = $allowselfsigned;
-	}
-
-	/**
-	 * Set tcp port of webdav server. Default is 80.
-	 *
-	 * @param int $port the port of the ftp server
-	 */
-	public function set_port($port) {
-		$this->port = $port;
-	}
-
-	/**
-	 * set user name for authentication.
-	 *
-	 * @param string $user username
-	 */
-	public function set_user($user) {
-		$this->user = $user;
-	}
-
-	/**
-	 * Set password for authentication.
-	 *
-	 * @param string $pass password
-	 */
-	public function set_pass($pass) {
-		$this->pass = $pass;
-	}
-
-	/**
-	 * set debug on (1) or off (0).
-	 * produces a lot of debug messages in webservers error log if set to on (1).
-	 *
-	 * @param bool $debug enable or disable debugging
-	 */
-	public function set_debug($debug) {
-		$this->debug = $debug;
-	}
-
-	/**
-	 * Opens the connection to the webdav server.
-	 *
-	 * @throws BackendException if connection is not successful
-	 *
-	 * @return bool true if action succeeded
-	 */
-	public function open() {
-		// check if curl is available
-		$serverHasCurl = function_exists('curl_version');
-		if (!$serverHasCurl) {
-			$e = new BackendException($this->parseErrorCodeToMessage(self::WD_ERR_NO_CURL), 500);
-			$e->setTitle($this->backendTransName . _('PHP-CURL is not installed'));
-
-			throw $e;
-		}
-
-		$davsettings = [
-			'baseUri' => $this->webdavUrl(),
-			'userName' => $this->user,
-			'password' => $this->pass,
-			'authType' => \Sabre\DAV\Client::AUTH_BASIC,
-		];
-
-		try {
-			$this->sabre_client = new FilesWebDavClient($davsettings);
-			$this->sabre_client->addCurlSetting(CURLOPT_SSL_VERIFYPEER, !$this->allowselfsigned);
-
-			return true;
-		}
-		catch (Exception $e) {
-			$this->log('Failed to open: ' . $e->getMessage());
-			if (intval($e->getHTTPCode()) == 401) {
-				$e = new BackendException($this->parseErrorCodeToMessage(self::WD_ERR_UNAUTHORIZED), $e->getHTTPCode());
-				$e->setTitle($this->backendTransName . _('Access denied'));
-
-				throw $e;
-			}
-			$e = new BackendException($this->parseErrorCodeToMessage(self::WD_ERR_UNREACHABLE), $e->getHTTPCode());
-			$e->setTitle($this->backendTransName . _('Connection failed'));
-
-			throw $e;
-		}
-	}
-
-	/**
-	 * show content of a directory.
-	 *
-	 * @param string $path      directory path
-	 * @param bool   $hidefirst Optional parameter to hide the root entry. Default true
-	 * @param mixed  $dir
-	 *
-	 * @throws BackendException if request is not successful
-	 *
-	 * @return mixed array with directory content
-	 */
-	public function ls($dir, $hidefirst = true) {
-		$time_start = microtime(true);
-		$dir = $this->removeSlash($dir);
-		$lsdata = [];
-		$this->log("[LS] start for dir: {$dir}");
-
-		try {
-			$response = $this->sabre_client->propFind($dir, [
-				'{http://owncloud.org/ns}fileid',
-				'{DAV:}resourcetype',
-				'{DAV:}getcontentlength',
-				'{DAV:}getlastmodified',
-				'{DAV:}getcontenttype',
-				'{DAV:}quota-used-bytes',
-				'{DAV:}quota-available-bytes',
-			], 1);
-			$this->log("[LS] backend fetched in: " . (microtime(true) - $time_start) . " seconds.");
-
-			foreach ($response as $name => $fields) {
-				if ($hidefirst) {
-					$hidefirst = false; // skip the first line - its the requested dir itself
-
-					continue;
-				}
-
-				$name = substr($name, strlen($this->path)); // skip the webdav path
-				$name = urldecode($name);
-
-				// Always fallback to a file resourceType
-				$type = "file";
-				if (isset($fields['{DAV:}resourcetype'])) {
-					$value = $fields['{DAV:}resourcetype']->getValue();
-					if (!empty($value) && $value[0] === "{DAV:}collection") {
-						$type = "collection";
-					}
-				}
-
-				$lsdata[$name] = [
-					"fileid" => isset($fields["{http://owncloud.org/ns}fileid"]) ? $fields["{http://owncloud.org/ns}fileid"] : '-1',
-					"resourcetype" => $type,
-					"getcontentlength" => isset($fields["{DAV:}getcontentlength"]) ? $fields["{DAV:}getcontentlength"] : null,
-					"getlastmodified" => isset($fields["{DAV:}getlastmodified"]) ? $fields["{DAV:}getlastmodified"] : null,
-					"getcontenttype" => isset($fields["{DAV:}getcontenttype"]) ? $fields["{DAV:}getcontenttype"] : null,
-					"quota-used-bytes" => isset($fields["{DAV:}quota-used-bytes"]) ? $fields["{DAV:}quota-used-bytes"] : null,
-					"quota-available-bytes" => isset($fields["{DAV:}quota-available-bytes"]) ? $fields["{DAV:}quota-available-bytes"] : null,
-				];
-			}
-			$time_end = microtime(true);
-			$time = $time_end - $time_start;
-			$this->log("[LS] done in {$time} seconds");
-
-			return $lsdata;
-		}
-		catch (ClientException $e) {
-			$this->log('ls sabre ClientException: ' . $e->getMessage());
-			$e = new BackendException($this->parseErrorCodeToMessage($e->getCode()), $e->getCode());
-			$e->setTitle($this->backendTransName . _('Sabre error'));
-
-			throw $e;
-		}
-		catch (Exception $e) {
-			$this->log('ls general exception: ' . $e->getMessage() . " [" . $e->getHTTPCode() . "]");
-			// THIS IS A FIX FOR OWNCLOUD - It does return 500 instead of 401...
-			$err_code = $e->getHTTPCode();
-			// check if code is 500 - then we should try to parse the error message
-			if ($err_code === 500) {
-				// message example: HTTP-Code: 401
-				$regx = '/[0-9]{3}/';
-				if (preg_match($regx, $e->getMessage(), $found)) {
-					$err_code = $found[0];
-				}
-			}
-			$e = new BackendException($this->parseErrorCodeToMessage($err_code), $err_code);
-			$e->setTitle($this->backendTransName . _('Connection failed'));
-
-			throw $e;
-		}
-	}
-
-	/**
-	 * create a new directory.
-	 *
-	 * @param string $dir directory path
-	 *
-	 * @throws BackendException if request is not successful
-	 *
-	 * @return bool true if action succeeded
-	 */
-	public function mkcol($dir) {
-		$time_start = microtime(true);
-		$dir = $this->removeSlash($dir);
-		$this->log("[MKCOL] start for dir: {$dir}");
-
-		try {
-			$response = $this->sabre_client->request("MKCOL", $dir, null);
-			$time_end = microtime(true);
-			$time = $time_end - $time_start;
-			$this->log("[MKCOL] done in {$time} seconds: " . $response['statusCode']);
-
-			return true;
-		}
-		catch (ClientException $e) {
-			$e = new BackendException($this->parseErrorCodeToMessage($e->getCode()), $e->getCode());
-			$e->setTitle($this->backendTransName . _('Sabre error'));
-
-			throw $e;
-		}
-		catch (Exception $e) {
-			$this->log('[MKCOL] fatal: ' . $e->getMessage());
-			$e = new BackendException($this->parseErrorCodeToMessage($e->getHTTPCode()), $e->getHTTPCode());
-			$e->setTitle($this->backendTransName . _('Directory creation failed'));
-
-			throw $e;
-		}
-	}
-
-	/**
-	 * delete a file or directory.
-	 *
-	 * @param string $path file/directory path
-	 *
-	 * @throws BackendException if request is not successful
-	 *
-	 * @return bool true if action succeeded
-	 */
-	public function delete($path) {
-		$time_start = microtime(true);
-		$path = $this->removeSlash($path);
-		$this->log("[DELETE] start for dir: {$path}");
-
-		try {
-			$response = $this->sabre_client->request("DELETE", $path, null);
-			$time_end = microtime(true);
-			$time = $time_end - $time_start;
-			$this->log("[DELETE] done in {$time} seconds: " . $response['statusCode']);
-
-			return true;
-		}
-		catch (ClientException $e) {
-			$e = new BackendException($this->parseErrorCodeToMessage($e->getCode()), $e->getCode());
-			$e->setTitle($this->backendTransName . _('Sabre error'));
-
-			throw $e;
-		}
-		catch (Exception $e) {
-			$this->log('[DELETE] fatal: ' . $e->getMessage());
-			$e = new BackendException($this->parseErrorCodeToMessage($e->getHTTPCode()), $e->getHTTPCode());
-			$e->setTitle($this->backendTransName . _('Deletion failed'));
-
-			throw $e;
-		}
-	}
-
-	/**
-	 * Move a file or collection on webdav server (serverside)
-	 * If you set param overwrite as true, the target will be overwritten.
-	 *
-	 * @param string $src_path  Source path
-	 * @param string $dest_path Destination path
-	 * @param bool   $overwrite Overwrite file if exists in $dest_path
-	 * @param mixed  $dst_path
-	 *
-	 * @throws BackendException if request is not successful
-	 *
-	 * @return bool true if action succeeded
-	 */
-	public function move($src_path, $dst_path, $overwrite = false) {
-		$time_start = microtime(true);
-		$src_path = $this->removeSlash($src_path);
-		$dst_path = $this->webdavUrl() . $this->removeSlash($dst_path);
-		$this->log("[MOVE] start for dir: {$src_path} -> {$dst_path}");
-		if ($overwrite) {
-			$overwrite = 'T';
-		}
-		else {
-			$overwrite = 'F';
-		}
-
-		try {
-			$response = $this->sabre_client->request("MOVE", $src_path, null, ["Destination" => $dst_path, 'Overwrite' => $overwrite]);
-			$time_end = microtime(true);
-			$time = $time_end - $time_start;
-			$this->log("[MOVE] done in {$time} seconds: " . $response['statusCode']);
-
-			return true;
-		}
-		catch (ClientException $e) {
-			$e = new BackendException($this->parseErrorCodeToMessage($e->getCode()), $e->getCode());
-			$e->setTitle($this->backendTransName . _('Sabre error'));
-
-			throw $e;
-		}
-		catch (Exception $e) {
-			$this->log('[MOVE] fatal: ' . $e->getMessage());
-			$e = new BackendException($this->parseErrorCodeToMessage($e->getHTTPCode()), $e->getHTTPCode());
-			$e->setTitle($this->backendTransName . _('Moving failed'));
-
-			throw $e;
-		}
-	}
-
-	/**
-	 * Puts a file into a collection.
-	 *
-	 * @param string $path Destination path
-	 * @param mixed  $data
-	 *
-	 * @string mixed $data Any kind of data
-	 *
-	 * @throws BackendException if request is not successful
-	 *
-	 * @return bool true if action succeeded
-	 */
-	public function put($path, $data) {
-		$time_start = microtime(true);
-		$path = $this->removeSlash($path);
-		$this->log("[PUT] start for dir: {$path} strlen: " . strlen($data));
-
-		try {
-			$response = $this->sabre_client->request("PUT", $path, $data);
-			$time_end = microtime(true);
-			$time = $time_end - $time_start;
-			$this->log("[PUT] done in {$time} seconds: " . $response['statusCode']);
-
-			return true;
-		}
-		catch (ClientException $e) {
-			$e = new BackendException($this->parseErrorCodeToMessage($e->getCode()), $e->getCode());
-			$e->setTitle($this->backendTransName . _('Sabre error'));
-
-			throw $e;
-		}
-		catch (Exception $e) {
-			$this->log('[PUT] fatal: ' . $e->getMessage());
-			$e = new BackendException($this->parseErrorCodeToMessage($e->getHTTPCode()), $e->getHTTPCode());
-			$e->setTitle($this->backendTransName . _('Connection failed'));
-
-			throw $e;
-		}
-	}
-
-	/**
-	 * Upload a local file.
-	 *
-	 * @param string $path     Destination path on the server
-	 * @param string $filename Local filename for the file that should be uploaded
-	 *
-	 * @throws BackendException if request is not successful
-	 *
-	 * @return bool true if action succeeded
-	 */
-	public function put_file($path, $filename) {
-		$buffer = file_get_contents($filename);
-
-		if ($buffer !== false) {
-			return $this->put($path, $buffer);
-		}
-		$e = new BackendException($this->parseErrorCodeToMessage(self::WD_ERR_TMP), self::WD_ERR_TMP);
-		$e->setTitle($this->backendTransName . _('Temporary directory problems'));
-
-		throw $e;
-	}
-
-	/**
-	 * Gets a file from a webdav collection.
-	 *
-	 * @param string $path   The source path on the server
-	 * @param mixed  $buffer Buffer for the received data
-	 *
-	 * @throws BackendException if request is not successful
-	 *
-	 * @return bool true if action succeeded
-	 */
-	public function get($path, &$buffer) {
-		$tmpfile = tempnam(TMP_PATH, stripslashes(base64_encode($path)));
-
-		$this->log("[GET] buffer path: {$tmpfile}");
-		$this->get_file($path, $tmpfile);
-
-		$buffer = file_get_contents($tmpfile);
-		unlink($tmpfile);
-	}
-
-	/**
-	 * Gets a file from a collection into local filesystem.
-	 *
-	 * @param string $srcpath   Source path on server
-	 * @param string $localpath Destination path on local filesystem
-	 *
-	 * @throws BackendException if request is not successful
-	 *
-	 * @return bool true if action succeeded
-	 */
-	public function get_file($srcpath, $localpath) {
-		$time_start = microtime(true);
-		$path = $this->removeSlash($srcpath);
-		$this->log("[GET_FILE] start for dir: {$path}");
-		$this->log("[GET_FILE] local path (" . $localpath . ") writeable: " . is_writable($localpath));
-
-		try {
-			$response = $this->sabre_client->getFile($path, $localpath);
-			$time_end = microtime(true);
-			$time = $time_end - $time_start;
-			$this->log("[GET_FILE] done in {$time} seconds: " . $response['statusCode']);
-		}
-		catch (ClientException $e) {
-			$e = new BackendException($this->parseErrorCodeToMessage($e->getCode()), $e->getCode());
-			$e->setTitle($this->backendTransName . _('Sabre error'));
-
-			throw $e;
-		}
-		catch (Exception $e) {
-			$this->log('[GET_FILE] - FATAL -' . $e->getMessage());
-			$e = new BackendException($this->parseErrorCodeToMessage($e->getHTTPCode()), $e->getHTTPCode());
-			$e->setTitle($this->backendTransName . _('File or folder not found'));
-
-			throw $e;
-		}
-	}
-
-	/**
-	 * Public method copy_file.
-	 *
-	 * Copy a file on webdav server
-	 * Duplicates a file on the webdav server (serverside).
-	 * All work is done on the webdav server. If you set param overwrite as true,
-	 * the target will be overwritten.
-	 *
-	 * @param string $src_path  Source path
-	 * @param string $dest_path Destination path
-	 * @param bool   $overwrite Overwrite if file exists in $dst_path
-	 * @param mixed  $dst_path
-	 *
-	 * @throws BackendException if request is not successful
-	 *
-	 * @return bool true if action succeeded
-	 */
-	public function copy_file($src_path, $dst_path, $overwrite = false) {
-		return $this->copy($src_path, $dst_path, $overwrite, false);
-	}
-
-	/**
-	 * Public method copy_coll.
-	 *
-	 * Copy a collection on webdav server
-	 * Duplicates a collection on the webdav server (serverside).
-	 * All work is done on the webdav server. If you set param overwrite as true,
-	 * the target will be overwritten.
-	 *
-	 * @param string $src_path  Source path
-	 * @param string $dest_path Destination path
-	 * @param bool   $overwrite Overwrite if collection exists in $dst_path
-	 * @param mixed  $dst_path
-	 *
-	 * @throws BackendException if request is not successful
-	 *
-	 * @return bool true if action succeeded
-	 */
-	public function copy_coll($src_path, $dst_path, $overwrite = false) {
-		return $this->copy($src_path, $dst_path, $overwrite, true);
-	}
-
-	/**
-	 * Gets path information from webdav server for one element.
-	 *
-	 * @param string $path Path to file or folder
-	 *
-	 * @throws BackendException if request is not successful
-	 *
-	 * @return array directory info
-	 */
-	public function gpi($path) {
-		$path = $this->removeSlash($path);
-		$response = $this->sabre_client->propFind($path, [
-			'{http://owncloud.org/ns}fileid',
-			'{DAV:}resourcetype',
-			'{DAV:}getcontentlength',
-			'{DAV:}getlastmodified',
-			'{DAV:}getcontenttype',
-			'{DAV:}quota-used-bytes',
-			'{DAV:}quota-available-bytes',
-		]);
-
-		$type = $response["{DAV:}resourcetype"]->resourceType;
-		if (is_array($type) && !empty($type)) {
-			$type = $type[0] == "{DAV:}collection" ? "collection" : "file";
-		}
-		else {
-			$type = "file"; // fall back to file if detection fails... less harmful
-		}
-
-		return [
-			"fileid" => isset($response["{http://owncloud.org/ns}fileid"]) ? $response["{http://owncloud.org/ns}fileid"] : '-1',
-			"resourcetype" => $type,
-			"getcontentlength" => isset($response["{DAV:}getcontentlength"]) ? $response["{DAV:}getcontentlength"] : null,
-			"getlastmodified" => isset($response["{DAV:}getlastmodified"]) ? $response["{DAV:}getlastmodified"] : null,
-			"getcontenttype" => isset($response["{DAV:}getcontenttype"]) ? $response["{DAV:}getcontenttype"] : null,
-			"quota-used-bytes" => isset($response["{DAV:}quota-used-bytes"]) ? $response["{DAV:}quota-used-bytes"] : null,
-			"quota-available-bytes" => isset($response["{DAV:}quota-available-bytes"]) ? $response["{DAV:}quota-available-bytes"] : null,
-		];
-	}
-
-	/**
-	 * Gets server information.
-	 *
-	 * @throws BackendException if request is not successful
-	 *
-	 * @return array with all header fields returned from webdav server
-	 */
-	public function options() {
-		$features = $this->sabre_client->options();
-
-		// be sure it is an array
-		if (is_array($features)) {
-			return $features;
-		}
-
-		$this->log('[OPTIONS] - ERROR - Error getting server features');
-		$e = new BackendException($this->parseErrorCodeToMessage(self::WD_ERR_FEATURES), self::WD_ERR_FEATURES);
-		$e->setTitle($this->backendTransName . _('Not implemented'));
-
-		throw $e;
-	}
-
-	/**
-	 * Gather whether a path points to a file or not.
-	 *
-	 * @param string $path Path to file or folder
-	 *
-	 * @return bool true if path points to a file, false otherwise
-	 */
-	public function is_file($path) {
-		$item = $this->gpi($path);
-
-		return $item === false ? false : ($item['resourcetype'] != 'collection');
-	}
-
-	/**
-	 * Gather whether a path points to a directory.
-	 *
-	 * @param string $path Path to file or folder
-	 *
-	 * @return bool true if path points to a directory, false otherwise
-	 */
-	public function is_dir($path) {
-		$item = $this->gpi($path);
-
-		return $item === false ? false : ($item['resourcetype'] == 'collection');
-	}
-
-	/**
-	 * check if file/directory exists.
-	 *
-	 * @param string $path Path to file or folder
-	 *
-	 * @return bool true if path exists, false otherwise
-	 */
-	public function exists($path) {
-		return $this->is_dir($path) || $this->is_file($path);
-	}
-
-	/**
-	 * Copy a collection on webdav server
-	 * Duplicates a collection on the webdav server (serverside).
-	 * All work is done on the webdav server. If you set param overwrite as true,
-	 * the target will be overwritten.
-	 *
-	 * @param string $src_path  Source path
-	 * @param string $dest_path Destination path
-	 * @param bool   $overwrite Overwrite if collection exists in $dst_path
-	 * @param bool   $coll      set this to true if you want to copy a folder
-	 * @param mixed  $dst_path
-	 *
-	 * @throws BackendException if request is not successful
-	 *
-	 * @return bool true if action succeeded
-	 */
-	private function copy($src_path, $dst_path, $overwrite, $coll) {
-		$time_start = microtime(true);
-		$src_path = $this->removeSlash($src_path);
-		$dst_path = $this->webdavUrl() . $this->removeSlash($dst_path);
-		$this->log("[COPY] start for dir: {$src_path} -> {$dst_path}");
-		if ($overwrite) {
-			$overwrite = 'T';
-		}
-		else {
-			$overwrite = 'F';
-		}
-
-		["Destination" => $dst_path, 'Overwrite' => $overwrite];
-		if ($coll) {
-			$settings = ["Destination" => $dst_path, 'Depth' => 'Infinity'];
-		}
-
-		try {
-			$response = $this->sabre_client->request("COPY", $src_path, null, $settings);
-			$time_end = microtime(true);
-			$time = $time_end - $time_start;
-			$this->log("[COPY] done in {$time} seconds: " . $response['statusCode']);
-
-			return true;
-		}
-		catch (ClientException $e) {
-			$e = new BackendException($this->parseErrorCodeToMessage($e->getCode()), $e->getCode());
-			$e->setTitle($this->backendTransName . _('Sabre error'));
-
-			throw $e;
-		}
-		catch (Exception $e) {
-			$this->log('[COPY] - FATAL - ' . $e->getMessage());
-			$e = new BackendException($this->parseErrorCodeToMessage($e->getHTTPCode()), $e->getHTTPCode());
-			$e->setTitle($this->backendTransName . _('Copying failed'));
-
-			throw $e;
-		}
-	}
-
-	/**
-	 * Create the base webdav url.
-	 *
-	 * @return string baseURL
-	 */
-	protected function webdavUrl() {
-		if ($this->ssl) {
-			$url = "https://";
-		}
-		else {
-			$url = "http://";
-		}
-
-		// make sure that we do not have any trailing / in our url
-		$server = rtrim($this->server, '/');
-		$path = rtrim($this->path, '/');
-
-		$url .= $server . ":" . $this->port . $path . "/";
-
-		return $url;
-	}
-
-	/**
-	 * Removes the leading slash from the folder path.
-	 *
-	 * @param string $dir directory path
-	 *
-	 * @return string trimmed directory path
-	 */
-	public function removeSlash($dir) {
-		if (strpos($dir, '/') === 0) {
-			$dir = substr($dir, 1);
-		}
-
-		// remove all html entities and urlencode the path...
-		$nohtml = html_entity_decode($dir);
-
-		return implode("/", array_map("rawurlencode", explode("/", $nohtml)));
-	}
-
-	/**
-	 * This function will return a user friendly error string.
-	 *
-	 * @param number $error_code A error code
-	 *
-	 * @return string userfriendly error message
-	 */
-	private function parseErrorCodeToMessage($error_code) {
-		$error = intval($error_code);
-
-		$msg = _('Unknown error');
-		$contactAdmin = _('Please contact your system administrator');
-
-		switch ($error) {
-			case CURLE_BAD_PASSWORD_ENTERED:
-			case self::WD_ERR_UNAUTHORIZED:
-				$msg = _('Unauthorized. Wrong username or password.');
-				break;
-
-			case CURLE_SSL_CONNECT_ERROR:
-			case CURLE_COULDNT_RESOLVE_HOST:
-			case CURLE_COULDNT_CONNECT:
-			case CURLE_OPERATION_TIMEOUTED:
-			case self::WD_ERR_UNREACHABLE:
-				$msg = _('File server is not reachable. Please verify the connection.');
-				break;
-
-			case self::WD_ERR_NOTALLOWED:
-				$msg = _('File server is not reachable. Please verify the file server URL.');
-				break;
-
-			case self::WD_ERR_FORBIDDEN:
-				$msg = _('You don\'t have enough permissions to view this file or folder.');
-				break;
-
-			case self::WD_ERR_NOTFOUND:
-				$msg = _('The file or folder is not available anymore.');
-				break;
-
-			case self::WD_ERR_TIMEOUT:
-				$msg = _('Connection to the file server timed out. Please check again later.');
-				break;
-
-			case self::WD_ERR_LOCKED:
-				$msg = _('This file is locked by another user. Please try again later.');
-				break;
-
-			case self::WD_ERR_FAILED_DEPENDENCY:
-				$msg = _('The request failed.') . ' ' . $contactAdmin;
-				break;
-
-			case self::WD_ERR_INTERNAL:
-				// This is a general error, might be thrown due to a wrong IP, but we don't know.
-				$msg = _('The file server encountered an internal problem.') . ' ' . $contactAdmin;
-				break;
-
-			case self::WD_ERR_TMP:
-				$msg = _('We could not write to temporary directory.') . ' ' . $contactAdmin;
-				break;
-
-			case self::WD_ERR_FEATURES:
-				$msg = _('We could not retrieve list of server features.') . ' ' . $contactAdmin;
-				break;
-
-			case self::WD_ERR_NO_CURL:
-				$msg = _('PHP-Curl is not available.') . ' ' . $contactAdmin;
-				break;
-		}
-
-		return $msg;
-	}
-
-	public function getFormConfig() {
-		$json = json_encode($this->metaConfig);
-
-		if ($json === false) {
-			error_log(json_last_error());
-		}
-
-		return $json;
-	}
-
-	public function getFormConfigWithData() {
-		return json_encode($this->metaConfig);
-	}
-
-	/**
-	 * a simple php error_log wrapper.
-	 *
-	 * @param string $err_string error message
-	 */
-	private function log($err_string) {
-		if ($this->debug) {
-			error_log("[BACKEND_WEBDAV]: " . $err_string);
-		}
-	}
-
-	/**
-	 * ============================ FEATURE FUNCTIONS ========================.
-	 *
-	 * @param mixed $dir
-	 */
-
-	/**
-	 * Returns the bytes that are currently used.
-	 *
-	 * @param string $dir directory to check
-	 *
-	 * @return int bytes that are used or -1 on error
-	 */
-	public function getQuotaBytesUsed($dir) {
-		$lsdata = $this->ls($dir, false);
-
-		if (isset($lsdata) && is_array($lsdata)) {
-			return $lsdata[$dir]["quota-used-bytes"];
-		}
-
-		return -1;
-	}
-
-	/**
-	 * Returns the bytes that are currently available.
-	 *
-	 * @param string $dir directory to check
-	 *
-	 * @return int bytes that are available or -1 on error
-	 */
-	public function getQuotaBytesAvailable($dir) {
-		$lsdata = $this->ls($dir, false);
-
-		if (isset($lsdata) && is_array($lsdata)) {
-			return $lsdata[$dir]["quota-available-bytes"];
-		}
-
-		return -1;
-	}
-
-	/**
-	 * Return the version string of the server backend.
-	 *
-	 * @throws BackendException
-	 *
-	 * @return string
-	 */
-	public function getServerVersion() {
-		// check if curl is available
-		$serverHasCurl = function_exists('curl_version');
-		if (!$serverHasCurl) {
-			$e = new BackendException($this->parseErrorCodeToMessage(self::WD_ERR_NO_CURL), 500);
-			$e->setTitle($this->backendTransName . _('PHP-CURL not installed'));
-
-			throw $e;
-		}
-
-		$webdavurl = $this->webdavUrl();
-
-		$url = substr($webdavurl, 0, strlen($webdavurl) - strlen("remote.php/webdav/")) . "status.php";
-
-		// try to get the contents of the owncloud status page
-		$ch = curl_init();
-		curl_setopt($ch, CURLOPT_AUTOREFERER, true);
-		curl_setopt($ch, CURLOPT_TIMEOUT, 3); // timeout of 3 seconds
-		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
-		curl_setopt($ch, CURLOPT_URL, $url);
-		curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
-		if ($this->allowselfsigned) {
-			curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
-			curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
-		}
-		$versiondata = curl_exec($ch);
-		$httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
-		curl_close($ch);
-
-		if ($httpcode && $httpcode == "200" && $versiondata) {
-			$versions = json_decode($versiondata);
-			$version = $versions->versionstring;
-		}
-		else {
-			$version = "Undetected (no Owncloud?)";
-		}
-
-		return $version;
-	}
+    /**
+     * Error codes
+     * see @parseErrorCodeToMessage for description.
+     */
+    public const WD_ERR_UNAUTHORIZED = 401;
+    public const WD_ERR_FORBIDDEN = 403;
+    public const WD_ERR_NOTFOUND = 404;
+    public const WD_ERR_NOTALLOWED = 405;
+    public const WD_ERR_TIMEOUT = 408;
+    public const WD_ERR_LOCKED = 423;
+    public const WD_ERR_FAILED_DEPENDENCY = 423;
+    public const WD_ERR_INTERNAL = 500;
+    public const WD_ERR_UNREACHABLE = 800;
+    public const WD_ERR_TMP = 801;
+    public const WD_ERR_FEATURES = 802;
+    public const WD_ERR_NO_CURL = 803;
+
+    /**
+     * Configuration data for the extjs metaform.
+     */
+    protected $formConfig;
+    protected $formFields;
+    protected $metaConfig;
+
+    /**
+     * @var bool debugging flag, if true, debugging is enabled
+     */
+    public $debug = false;
+
+    /**
+     * @var int webdav server port
+     */
+    public $port = 80;
+
+    /**
+     * @var string hostname or ip
+     */
+    public $server = "localhost";
+
+    /**
+     * @var string global path prefix for all requests
+     */
+    public $path = "/webdav.php";
+
+    /**
+     * @var bool if true, ssl is used
+     */
+    public $ssl = false;
+
+    /**
+     * @var bool allow self signed certificates
+     */
+    public $allowselfsigned = true;
+
+    /**
+     * @var string the username
+     */
+    public $user = "";
+
+    /**
+     * @var string the password
+     */
+    public $pass = "";
+
+    /**
+     * @var FilesWebDavClient the SabreDAV client object
+     */
+    public $sabre_client;
+
+    /**
+     * @constructor
+     */
+    public function __construct() {
+        // initialization
+        $this->debug = PLUGIN_FILESBROWSER_LOGLEVEL === "DEBUG" ? true : false;
+
+        $this->init_form();
+
+        // set backend description
+        $this->backendDescription = _("With this backend, you can connect to any WebDAV server.");
+
+        // set backend display name
+        $this->backendDisplayName = "Webdav";
+
+        // set backend version
+        // TODO: this should be changed on every release
+        $this->backendVersion = "3.0";
+
+        // Backend name used in translations
+        $this->backendTransName = _('Files WebDAV Backend: ');
+    }
+
+    /**
+     * Initialise form fields.
+     */
+    private function init_form() {
+        $this->formConfig = [
+            "labelAlign" => "left",
+            "columnCount" => 1,
+            "labelWidth" => 80,
+            "defaults" => [
+                "width" => 292,
+            ],
+        ];
+
+        $this->formFields = [
+            [
+                "name" => "server_address",
+                "fieldLabel" => _('Server address'),
+                "editor" => [
+                    "allowBlank" => false,
+                ],
+            ],
+            [
+                "name" => "server_port",
+                "fieldLabel" => _('Server port'),
+                "editor" => [
+                    "ref" => "../../portField",
+                    "allowBlank" => false,
+                ],
+            ],
+            [
+                "name" => "server_ssl",
+                "fieldLabel" => _('Use SSL'),
+                "editor" => [
+                    "xtype" => "checkbox",
+                    "listeners" => [
+                        "check" => "Zarafa.plugins.files.data.Actions.onCheckSSL", // this javascript function will be called!
+                    ],
+                ],
+            ],
+            [
+                "name" => "server_path",
+                "fieldLabel" => _('Webdav base path'),
+                "editor" => [
+                ],
+            ],
+            [
+                "name" => "user",
+                "fieldLabel" => _('Username'),
+                "editor" => [
+                    "ref" => "../../usernameField",
+                ],
+            ],
+            [
+                "name" => "password",
+                "fieldLabel" => _('Password'),
+                "editor" => [
+                    "ref" => "../../passwordField",
+                    "inputType" => "password",
+                ],
+            ],
+            [
+                "name" => "use_grommunio_credentials",
+                "fieldLabel" => _('Use grommunio credentials'),
+                "editor" => [
+                    "xtype" => "checkbox",
+                    "listeners" => [
+                        "check" => "Zarafa.plugins.files.data.Actions.onCheckCredentials", // this javascript function will be called!
+                    ],
+                ],
+            ],
+        ];
+
+        $this->metaConfig = [
+            "success" => true,
+            "metaData" => [
+                "fields" => $this->formFields,
+                "formConfig" => $this->formConfig,
+            ],
+            "data" => [ // here we can specify the default values.
+                "server_address" => "files.demo.com",
+                "server_port" => "80",
+                "server_path" => "/remote.php/webdav",
+            ],
+        ];
+    }
+
+    /**
+     * Initialize backend from $backend_config array.
+     *
+     * @param $backend_config
+     */
+    public function init_backend($backend_config) {
+        $this->set_server($backend_config["server_address"]);
+        $this->set_port($backend_config["server_port"]);
+        $this->set_base($backend_config["server_path"]);
+        $this->set_ssl($backend_config["server_ssl"]);
+
+        // set user and password
+        if ($backend_config["use_grommunio_credentials"] === false) {
+            $this->set_user($backend_config["user"]);
+            $this->set_pass($backend_config["password"]);
+        }
+        else {
+            // For backward compatibility we will check if the Encryption store exists. If not,
+            // we will fall back to the old way of retrieving the password from the session.
+            if (class_exists('EncryptionStore')) {
+                // Get the username and password from the Encryption store
+                $encryptionStore = \EncryptionStore::getInstance();
+                $this->set_user($encryptionStore->get('username'));
+                $this->set_pass($encryptionStore->get('password'));
+            }
+            else {
+                $this->set_user($GLOBALS['mapisession']->getUserName());
+                $password = $_SESSION['password'];
+                if (function_exists('openssl_decrypt')) {
+                    $this->set_pass(openssl_decrypt($password, "des-ede3-cbc", PASSWORD_KEY, 0, PASSWORD_IV));
+                }
+            }
+        }
+    }
+
+    /**
+     * Set webdav server. FQN or IP address.
+     *
+     * @param string $server hostname or ip of the ftp server
+     */
+    public function set_server($server) {
+        $this->server = $server;
+    }
+
+    /**
+     * Set base path.
+     *
+     * @param string $pp the global path prefix
+     */
+    public function set_base($pp) {
+        $this->path = $pp;
+        $this->log('Base path set to ' . $this->path);
+    }
+
+    /**
+     * Set ssl.
+     *
+     * @param int /bool $ssl (1 = true, 0 = false)
+     */
+    public function set_ssl($ssl) {
+        $this->ssl = $ssl ? true : false;
+        $this->log('SSL extension was set to ' . $this->ssl);
+    }
+
+    /**
+     * Allow self signed certificates - unimplemented.
+     *
+     * @param bool $allowselfsigned Allow self signed certificates. Not yet implemented.
+     */
+    public function set_selfsigned($allowselfsigned) {
+        $this->allowselfsigned = $allowselfsigned;
+    }
+
+    /**
+     * Set tcp port of webdav server. Default is 80.
+     *
+     * @param int $port the port of the ftp server
+     */
+    public function set_port($port) {
+        $this->port = $port;
+    }
+
+    /**
+     * set user name for authentication.
+     *
+     * @param string $user username
+     */
+    public function set_user($user) {
+        $this->user = $user;
+    }
+
+    /**
+     * Set password for authentication.
+     *
+     * @param string $pass password
+     */
+    public function set_pass($pass) {
+        $this->pass = $pass;
+    }
+
+    /**
+     * set debug on (1) or off (0).
+     * produces a lot of debug messages in webservers error log if set to on (1).
+     *
+     * @param bool $debug enable or disable debugging
+     */
+    public function set_debug($debug) {
+        $this->debug = $debug;
+    }
+
+    /**
+     * Opens the connection to the webdav server.
+     *
+     * @throws BackendException if connection is not successful
+     *
+     * @return bool true if action succeeded
+     */
+    public function open() {
+        // check if curl is available
+        $serverHasCurl = function_exists('curl_version');
+        if (!$serverHasCurl) {
+            $e = new BackendException($this->parseErrorCodeToMessage(self::WD_ERR_NO_CURL), 500);
+            $e->setTitle($this->backendTransName . _('PHP-CURL is not installed'));
+
+            throw $e;
+        }
+
+        $davsettings = [
+            'baseUri' => $this->webdavUrl(),
+            'userName' => $this->user,
+            'password' => $this->pass,
+            'authType' => \Sabre\DAV\Client::AUTH_BASIC,
+        ];
+
+        try {
+            $this->sabre_client = new FilesWebDavClient($davsettings);
+            $this->sabre_client->addCurlSetting(CURLOPT_SSL_VERIFYPEER, !$this->allowselfsigned);
+
+            return true;
+        }
+        catch (Exception $e) {
+            $this->log('Failed to open: ' . $e->getMessage());
+            if (intval($e->getHTTPCode()) == 401) {
+                $e = new BackendException($this->parseErrorCodeToMessage(self::WD_ERR_UNAUTHORIZED), $e->getHTTPCode());
+                $e->setTitle($this->backendTransName . _('Access denied'));
+
+                throw $e;
+            }
+            $e = new BackendException($this->parseErrorCodeToMessage(self::WD_ERR_UNREACHABLE), $e->getHTTPCode());
+            $e->setTitle($this->backendTransName . _('Connection failed'));
+
+            throw $e;
+        }
+    }
+
+    /**
+     * show content of a directory.
+     *
+     * @param string $path      directory path
+     * @param bool   $hidefirst Optional parameter to hide the root entry. Default true
+     * @param mixed  $dir
+     *
+     * @throws BackendException if request is not successful
+     *
+     * @return mixed array with directory content
+     */
+    public function ls($dir, $hidefirst = true) {
+        $time_start = microtime(true);
+        $dir = $this->removeSlash($dir);
+        $lsdata = [];
+        $this->log("[LS] start for dir: {$dir}");
+
+        try {
+            $response = $this->sabre_client->propFind($dir, [
+                '{http://owncloud.org/ns}fileid',
+                '{DAV:}resourcetype',
+                '{DAV:}getcontentlength',
+                '{DAV:}getlastmodified',
+                '{DAV:}getcontenttype',
+                '{DAV:}quota-used-bytes',
+                '{DAV:}quota-available-bytes',
+            ], 1);
+            $this->log("[LS] backend fetched in: " . (microtime(true) - $time_start) . " seconds.");
+
+            foreach ($response as $name => $fields) {
+                if ($hidefirst) {
+                    $hidefirst = false; // skip the first line - its the requested dir itself
+
+                    continue;
+                }
+
+                $name = substr($name, strlen($this->path)); // skip the webdav path
+                $name = urldecode($name);
+
+                // Always fallback to a file resourceType
+                $type = "file";
+                if (isset($fields['{DAV:}resourcetype'])) {
+                    $value = $fields['{DAV:}resourcetype']->getValue();
+                    if (!empty($value) && $value[0] === "{DAV:}collection") {
+                        $type = "collection";
+                    }
+                }
+
+                $lsdata[$name] = [
+                    "fileid" => isset($fields["{http://owncloud.org/ns}fileid"]) ? $fields["{http://owncloud.org/ns}fileid"] : '-1',
+                    "resourcetype" => $type,
+                    "getcontentlength" => isset($fields["{DAV:}getcontentlength"]) ? $fields["{DAV:}getcontentlength"] : null,
+                    "getlastmodified" => isset($fields["{DAV:}getlastmodified"]) ? $fields["{DAV:}getlastmodified"] : null,
+                    "getcontenttype" => isset($fields["{DAV:}getcontenttype"]) ? $fields["{DAV:}getcontenttype"] : null,
+                    "quota-used-bytes" => isset($fields["{DAV:}quota-used-bytes"]) ? $fields["{DAV:}quota-used-bytes"] : null,
+                    "quota-available-bytes" => isset($fields["{DAV:}quota-available-bytes"]) ? $fields["{DAV:}quota-available-bytes"] : null,
+                ];
+            }
+            $time_end = microtime(true);
+            $time = $time_end - $time_start;
+            $this->log("[LS] done in {$time} seconds");
+
+            return $lsdata;
+        }
+        catch (ClientException $e) {
+            $this->log('ls sabre ClientException: ' . $e->getMessage());
+            $e = new BackendException($this->parseErrorCodeToMessage($e->getCode()), $e->getCode());
+            $e->setTitle($this->backendTransName . _('Sabre error'));
+
+            throw $e;
+        }
+        catch (Exception $e) {
+            $this->log('ls general exception: ' . $e->getMessage() . " [" . $e->getHTTPCode() . "]");
+            // THIS IS A FIX FOR OWNCLOUD - It does return 500 instead of 401...
+            $err_code = $e->getHTTPCode();
+            // check if code is 500 - then we should try to parse the error message
+            if ($err_code === 500) {
+                // message example: HTTP-Code: 401
+                $regx = '/[0-9]{3}/';
+                if (preg_match($regx, $e->getMessage(), $found)) {
+                    $err_code = $found[0];
+                }
+            }
+            $e = new BackendException($this->parseErrorCodeToMessage($err_code), $err_code);
+            $e->setTitle($this->backendTransName . _('Connection failed'));
+
+            throw $e;
+        }
+    }
+
+    /**
+     * create a new directory.
+     *
+     * @param string $dir directory path
+     *
+     * @throws BackendException if request is not successful
+     *
+     * @return bool true if action succeeded
+     */
+    public function mkcol($dir) {
+        $time_start = microtime(true);
+        $dir = $this->removeSlash($dir);
+        $this->log("[MKCOL] start for dir: {$dir}");
+
+        try {
+            $response = $this->sabre_client->request("MKCOL", $dir, null);
+            $time_end = microtime(true);
+            $time = $time_end - $time_start;
+            $this->log("[MKCOL] done in {$time} seconds: " . $response['statusCode']);
+
+            return true;
+        }
+        catch (ClientException $e) {
+            $e = new BackendException($this->parseErrorCodeToMessage($e->getCode()), $e->getCode());
+            $e->setTitle($this->backendTransName . _('Sabre error'));
+
+            throw $e;
+        }
+        catch (Exception $e) {
+            $this->log('[MKCOL] fatal: ' . $e->getMessage());
+            $e = new BackendException($this->parseErrorCodeToMessage($e->getHTTPCode()), $e->getHTTPCode());
+            $e->setTitle($this->backendTransName . _('Directory creation failed'));
+
+            throw $e;
+        }
+    }
+
+    /**
+     * delete a file or directory.
+     *
+     * @param string $path file/directory path
+     *
+     * @throws BackendException if request is not successful
+     *
+     * @return bool true if action succeeded
+     */
+    public function delete($path) {
+        $time_start = microtime(true);
+        $path = $this->removeSlash($path);
+        $this->log("[DELETE] start for dir: {$path}");
+
+        try {
+            $response = $this->sabre_client->request("DELETE", $path, null);
+            $time_end = microtime(true);
+            $time = $time_end - $time_start;
+            $this->log("[DELETE] done in {$time} seconds: " . $response['statusCode']);
+
+            return true;
+        }
+        catch (ClientException $e) {
+            $e = new BackendException($this->parseErrorCodeToMessage($e->getCode()), $e->getCode());
+            $e->setTitle($this->backendTransName . _('Sabre error'));
+
+            throw $e;
+        }
+        catch (Exception $e) {
+            $this->log('[DELETE] fatal: ' . $e->getMessage());
+            $e = new BackendException($this->parseErrorCodeToMessage($e->getHTTPCode()), $e->getHTTPCode());
+            $e->setTitle($this->backendTransName . _('Deletion failed'));
+
+            throw $e;
+        }
+    }
+
+    /**
+     * Move a file or collection on webdav server (serverside)
+     * If you set param overwrite as true, the target will be overwritten.
+     *
+     * @param string $src_path  Source path
+     * @param string $dest_path Destination path
+     * @param bool   $overwrite Overwrite file if exists in $dest_path
+     * @param mixed  $dst_path
+     *
+     * @throws BackendException if request is not successful
+     *
+     * @return bool true if action succeeded
+     */
+    public function move($src_path, $dst_path, $overwrite = false) {
+        $time_start = microtime(true);
+        $src_path = $this->removeSlash($src_path);
+        $dst_path = $this->webdavUrl() . $this->removeSlash($dst_path);
+        $this->log("[MOVE] start for dir: {$src_path} -> {$dst_path}");
+        if ($overwrite) {
+            $overwrite = 'T';
+        }
+        else {
+            $overwrite = 'F';
+        }
+
+        try {
+            $response = $this->sabre_client->request("MOVE", $src_path, null, ["Destination" => $dst_path, 'Overwrite' => $overwrite]);
+            $time_end = microtime(true);
+            $time = $time_end - $time_start;
+            $this->log("[MOVE] done in {$time} seconds: " . $response['statusCode']);
+
+            return true;
+        }
+        catch (ClientException $e) {
+            $e = new BackendException($this->parseErrorCodeToMessage($e->getCode()), $e->getCode());
+            $e->setTitle($this->backendTransName . _('Sabre error'));
+
+            throw $e;
+        }
+        catch (Exception $e) {
+            $this->log('[MOVE] fatal: ' . $e->getMessage());
+            $e = new BackendException($this->parseErrorCodeToMessage($e->getHTTPCode()), $e->getHTTPCode());
+            $e->setTitle($this->backendTransName . _('Moving failed'));
+
+            throw $e;
+        }
+    }
+
+    /**
+     * Puts a file into a collection.
+     *
+     * @param string $path Destination path
+     * @param mixed  $data
+     *
+     * @string mixed $data Any kind of data
+     *
+     * @throws BackendException if request is not successful
+     *
+     * @return bool true if action succeeded
+     */
+    public function put($path, $data) {
+        $time_start = microtime(true);
+        $path = $this->removeSlash($path);
+        $this->log("[PUT] start for dir: {$path} strlen: " . strlen($data));
+
+        try {
+            $response = $this->sabre_client->request("PUT", $path, $data);
+            $time_end = microtime(true);
+            $time = $time_end - $time_start;
+            $this->log("[PUT] done in {$time} seconds: " . $response['statusCode']);
+
+            return true;
+        }
+        catch (ClientException $e) {
+            $e = new BackendException($this->parseErrorCodeToMessage($e->getCode()), $e->getCode());
+            $e->setTitle($this->backendTransName . _('Sabre error'));
+
+            throw $e;
+        }
+        catch (Exception $e) {
+            $this->log('[PUT] fatal: ' . $e->getMessage());
+            $e = new BackendException($this->parseErrorCodeToMessage($e->getHTTPCode()), $e->getHTTPCode());
+            $e->setTitle($this->backendTransName . _('Connection failed'));
+
+            throw $e;
+        }
+    }
+
+    /**
+     * Upload a local file.
+     *
+     * @param string $path     Destination path on the server
+     * @param string $filename Local filename for the file that should be uploaded
+     *
+     * @throws BackendException if request is not successful
+     *
+     * @return bool true if action succeeded
+     */
+    public function put_file($path, $filename) {
+        $buffer = file_get_contents($filename);
+
+        if ($buffer !== false) {
+            return $this->put($path, $buffer);
+        }
+        $e = new BackendException($this->parseErrorCodeToMessage(self::WD_ERR_TMP), self::WD_ERR_TMP);
+        $e->setTitle($this->backendTransName . _('Temporary directory problems'));
+
+        throw $e;
+    }
+
+    /**
+     * Gets a file from a webdav collection.
+     *
+     * @param string $path   The source path on the server
+     * @param mixed  $buffer Buffer for the received data
+     *
+     * @throws BackendException if request is not successful
+     *
+     * @return bool true if action succeeded
+     */
+    public function get($path, &$buffer) {
+        $tmpfile = tempnam(TMP_PATH, stripslashes(base64_encode($path)));
+
+        $this->log("[GET] buffer path: {$tmpfile}");
+        $this->get_file($path, $tmpfile);
+
+        $buffer = file_get_contents($tmpfile);
+        unlink($tmpfile);
+    }
+
+    /**
+     * Gets a file from a collection into local filesystem.
+     *
+     * @param string $srcpath   Source path on server
+     * @param string $localpath Destination path on local filesystem
+     *
+     * @throws BackendException if request is not successful
+     *
+     * @return bool true if action succeeded
+     */
+    public function get_file($srcpath, $localpath) {
+        $time_start = microtime(true);
+        $path = $this->removeSlash($srcpath);
+        $this->log("[GET_FILE] start for dir: {$path}");
+        $this->log("[GET_FILE] local path (" . $localpath . ") writeable: " . is_writable($localpath));
+
+        try {
+            $response = $this->sabre_client->getFile($path, $localpath);
+            $time_end = microtime(true);
+            $time = $time_end - $time_start;
+            $this->log("[GET_FILE] done in {$time} seconds: " . $response['statusCode']);
+        }
+        catch (ClientException $e) {
+            $e = new BackendException($this->parseErrorCodeToMessage($e->getCode()), $e->getCode());
+            $e->setTitle($this->backendTransName . _('Sabre error'));
+
+            throw $e;
+        }
+        catch (Exception $e) {
+            $this->log('[GET_FILE] - FATAL -' . $e->getMessage());
+            $e = new BackendException($this->parseErrorCodeToMessage($e->getHTTPCode()), $e->getHTTPCode());
+            $e->setTitle($this->backendTransName . _('File or folder not found'));
+
+            throw $e;
+        }
+    }
+
+    /**
+     * Public method copy_file.
+     *
+     * Copy a file on webdav server
+     * Duplicates a file on the webdav server (serverside).
+     * All work is done on the webdav server. If you set param overwrite as true,
+     * the target will be overwritten.
+     *
+     * @param string $src_path  Source path
+     * @param string $dest_path Destination path
+     * @param bool   $overwrite Overwrite if file exists in $dst_path
+     * @param mixed  $dst_path
+     *
+     * @throws BackendException if request is not successful
+     *
+     * @return bool true if action succeeded
+     */
+    public function copy_file($src_path, $dst_path, $overwrite = false) {
+        return $this->copy($src_path, $dst_path, $overwrite, false);
+    }
+
+    /**
+     * Public method copy_coll.
+     *
+     * Copy a collection on webdav server
+     * Duplicates a collection on the webdav server (serverside).
+     * All work is done on the webdav server. If you set param overwrite as true,
+     * the target will be overwritten.
+     *
+     * @param string $src_path  Source path
+     * @param string $dest_path Destination path
+     * @param bool   $overwrite Overwrite if collection exists in $dst_path
+     * @param mixed  $dst_path
+     *
+     * @throws BackendException if request is not successful
+     *
+     * @return bool true if action succeeded
+     */
+    public function copy_coll($src_path, $dst_path, $overwrite = false) {
+        return $this->copy($src_path, $dst_path, $overwrite, true);
+    }
+
+    /**
+     * Gets path information from webdav server for one element.
+     *
+     * @param string $path Path to file or folder
+     *
+     * @throws BackendException if request is not successful
+     *
+     * @return array directory info
+     */
+    public function gpi($path) {
+        $path = $this->removeSlash($path);
+        $response = $this->sabre_client->propFind($path, [
+            '{http://owncloud.org/ns}fileid',
+            '{DAV:}resourcetype',
+            '{DAV:}getcontentlength',
+            '{DAV:}getlastmodified',
+            '{DAV:}getcontenttype',
+            '{DAV:}quota-used-bytes',
+            '{DAV:}quota-available-bytes',
+        ]);
+
+        $type = $response["{DAV:}resourcetype"]->resourceType;
+        if (is_array($type) && !empty($type)) {
+            $type = $type[0] == "{DAV:}collection" ? "collection" : "file";
+        }
+        else {
+            $type = "file"; // fall back to file if detection fails... less harmful
+        }
+
+        return [
+            "fileid" => isset($response["{http://owncloud.org/ns}fileid"]) ? $response["{http://owncloud.org/ns}fileid"] : '-1',
+            "resourcetype" => $type,
+            "getcontentlength" => isset($response["{DAV:}getcontentlength"]) ? $response["{DAV:}getcontentlength"] : null,
+            "getlastmodified" => isset($response["{DAV:}getlastmodified"]) ? $response["{DAV:}getlastmodified"] : null,
+            "getcontenttype" => isset($response["{DAV:}getcontenttype"]) ? $response["{DAV:}getcontenttype"] : null,
+            "quota-used-bytes" => isset($response["{DAV:}quota-used-bytes"]) ? $response["{DAV:}quota-used-bytes"] : null,
+            "quota-available-bytes" => isset($response["{DAV:}quota-available-bytes"]) ? $response["{DAV:}quota-available-bytes"] : null,
+        ];
+    }
+
+    /**
+     * Gets server information.
+     *
+     * @throws BackendException if request is not successful
+     *
+     * @return array with all header fields returned from webdav server
+     */
+    public function options() {
+        $features = $this->sabre_client->options();
+
+        // be sure it is an array
+        if (is_array($features)) {
+            return $features;
+        }
+
+        $this->log('[OPTIONS] - ERROR - Error getting server features');
+        $e = new BackendException($this->parseErrorCodeToMessage(self::WD_ERR_FEATURES), self::WD_ERR_FEATURES);
+        $e->setTitle($this->backendTransName . _('Not implemented'));
+
+        throw $e;
+    }
+
+    /**
+     * Gather whether a path points to a file or not.
+     *
+     * @param string $path Path to file or folder
+     *
+     * @return bool true if path points to a file, false otherwise
+     */
+    public function is_file($path) {
+        $item = $this->gpi($path);
+
+        return $item === false ? false : ($item['resourcetype'] != 'collection');
+    }
+
+    /**
+     * Gather whether a path points to a directory.
+     *
+     * @param string $path Path to file or folder
+     *
+     * @return bool true if path points to a directory, false otherwise
+     */
+    public function is_dir($path) {
+        $item = $this->gpi($path);
+
+        return $item === false ? false : ($item['resourcetype'] == 'collection');
+    }
+
+    /**
+     * check if file/directory exists.
+     *
+     * @param string $path Path to file or folder
+     *
+     * @return bool true if path exists, false otherwise
+     */
+    public function exists($path) {
+        return $this->is_dir($path) || $this->is_file($path);
+    }
+
+    /**
+     * Copy a collection on webdav server
+     * Duplicates a collection on the webdav server (serverside).
+     * All work is done on the webdav server. If you set param overwrite as true,
+     * the target will be overwritten.
+     *
+     * @param string $src_path  Source path
+     * @param string $dest_path Destination path
+     * @param bool   $overwrite Overwrite if collection exists in $dst_path
+     * @param bool   $coll      set this to true if you want to copy a folder
+     * @param mixed  $dst_path
+     *
+     * @throws BackendException if request is not successful
+     *
+     * @return bool true if action succeeded
+     */
+    private function copy($src_path, $dst_path, $overwrite, $coll) {
+        $time_start = microtime(true);
+        $src_path = $this->removeSlash($src_path);
+        $dst_path = $this->webdavUrl() . $this->removeSlash($dst_path);
+        $this->log("[COPY] start for dir: {$src_path} -> {$dst_path}");
+        if ($overwrite) {
+            $overwrite = 'T';
+        }
+        else {
+            $overwrite = 'F';
+        }
+
+        ["Destination" => $dst_path, 'Overwrite' => $overwrite];
+        if ($coll) {
+            $settings = ["Destination" => $dst_path, 'Depth' => 'Infinity'];
+        }
+
+        try {
+            $response = $this->sabre_client->request("COPY", $src_path, null, $settings);
+            $time_end = microtime(true);
+            $time = $time_end - $time_start;
+            $this->log("[COPY] done in {$time} seconds: " . $response['statusCode']);
+
+            return true;
+        }
+        catch (ClientException $e) {
+            $e = new BackendException($this->parseErrorCodeToMessage($e->getCode()), $e->getCode());
+            $e->setTitle($this->backendTransName . _('Sabre error'));
+
+            throw $e;
+        }
+        catch (Exception $e) {
+            $this->log('[COPY] - FATAL - ' . $e->getMessage());
+            $e = new BackendException($this->parseErrorCodeToMessage($e->getHTTPCode()), $e->getHTTPCode());
+            $e->setTitle($this->backendTransName . _('Copying failed'));
+
+            throw $e;
+        }
+    }
+
+    /**
+     * Create the base webdav url.
+     *
+     * @return string baseURL
+     */
+    protected function webdavUrl() {
+        if ($this->ssl) {
+            $url = "https://";
+        }
+        else {
+            $url = "http://";
+        }
+
+        // make sure that we do not have any trailing / in our url
+        $server = rtrim($this->server, '/');
+        $path = rtrim($this->path, '/');
+
+        $url .= $server . ":" . $this->port . $path . "/";
+
+        return $url;
+    }
+
+    /**
+     * Removes the leading slash from the folder path.
+     *
+     * @param string $dir directory path
+     *
+     * @return string trimmed directory path
+     */
+    public function removeSlash($dir) {
+        if (strpos($dir, '/') === 0) {
+            $dir = substr($dir, 1);
+        }
+
+        // remove all html entities and urlencode the path...
+        $nohtml = html_entity_decode($dir);
+
+        return implode("/", array_map("rawurlencode", explode("/", $nohtml)));
+    }
+
+    /**
+     * This function will return a user friendly error string.
+     *
+     * @param number $error_code A error code
+     *
+     * @return string userfriendly error message
+     */
+    private function parseErrorCodeToMessage($error_code) {
+        $error = intval($error_code);
+
+        $msg = _('Unknown error');
+        $contactAdmin = _('Please contact your system administrator');
+
+        switch ($error) {
+            case CURLE_BAD_PASSWORD_ENTERED:
+            case self::WD_ERR_UNAUTHORIZED:
+                $msg = _('Unauthorized. Wrong username or password.');
+                break;
+
+            case CURLE_SSL_CONNECT_ERROR:
+            case CURLE_COULDNT_RESOLVE_HOST:
+            case CURLE_COULDNT_CONNECT:
+            case CURLE_OPERATION_TIMEOUTED:
+            case self::WD_ERR_UNREACHABLE:
+                $msg = _('File server is not reachable. Please verify the connection.');
+                break;
+
+            case self::WD_ERR_NOTALLOWED:
+                $msg = _('File server is not reachable. Please verify the file server URL.');
+                break;
+
+            case self::WD_ERR_FORBIDDEN:
+                $msg = _('You don\'t have enough permissions to view this file or folder.');
+                break;
+
+            case self::WD_ERR_NOTFOUND:
+                $msg = _('The file or folder is not available anymore.');
+                break;
+
+            case self::WD_ERR_TIMEOUT:
+                $msg = _('Connection to the file server timed out. Please check again later.');
+                break;
+
+            case self::WD_ERR_LOCKED:
+                $msg = _('This file is locked by another user. Please try again later.');
+                break;
+
+            case self::WD_ERR_FAILED_DEPENDENCY:
+                $msg = _('The request failed.') . ' ' . $contactAdmin;
+                break;
+
+            case self::WD_ERR_INTERNAL:
+                // This is a general error, might be thrown due to a wrong IP, but we don't know.
+                $msg = _('The file server encountered an internal problem.') . ' ' . $contactAdmin;
+                break;
+
+            case self::WD_ERR_TMP:
+                $msg = _('We could not write to temporary directory.') . ' ' . $contactAdmin;
+                break;
+
+            case self::WD_ERR_FEATURES:
+                $msg = _('We could not retrieve list of server features.') . ' ' . $contactAdmin;
+                break;
+
+            case self::WD_ERR_NO_CURL:
+                $msg = _('PHP-Curl is not available.') . ' ' . $contactAdmin;
+                break;
+        }
+
+        return $msg;
+    }
+
+    public function getFormConfig() {
+        $json = json_encode($this->metaConfig);
+
+        if ($json === false) {
+            error_log(json_last_error());
+        }
+
+        return $json;
+    }
+
+    public function getFormConfigWithData() {
+        return json_encode($this->metaConfig);
+    }
+
+    /**
+     * a simple php error_log wrapper.
+     *
+     * @param string $err_string error message
+     */
+    private function log($err_string) {
+        if ($this->debug) {
+            error_log("[BACKEND_WEBDAV]: " . $err_string);
+        }
+    }
+
+    /**
+     * ============================ FEATURE FUNCTIONS ========================.
+     *
+     * @param mixed $dir
+     */
+
+    /**
+     * Returns the bytes that are currently used.
+     *
+     * @param string $dir directory to check
+     *
+     * @return int bytes that are used or -1 on error
+     */
+    public function getQuotaBytesUsed($dir) {
+        $lsdata = $this->ls($dir, false);
+
+        if (isset($lsdata) && is_array($lsdata)) {
+            return $lsdata[$dir]["quota-used-bytes"];
+        }
+
+        return -1;
+    }
+
+    /**
+     * Returns the bytes that are currently available.
+     *
+     * @param string $dir directory to check
+     *
+     * @return int bytes that are available or -1 on error
+     */
+    public function getQuotaBytesAvailable($dir) {
+        $lsdata = $this->ls($dir, false);
+
+        if (isset($lsdata) && is_array($lsdata)) {
+            return $lsdata[$dir]["quota-available-bytes"];
+        }
+
+        return -1;
+    }
+
+    /**
+     * Return the version string of the server backend.
+     *
+     * @throws BackendException
+     *
+     * @return string
+     */
+    public function getServerVersion() {
+        // check if curl is available
+        $serverHasCurl = function_exists('curl_version');
+        if (!$serverHasCurl) {
+            $e = new BackendException($this->parseErrorCodeToMessage(self::WD_ERR_NO_CURL), 500);
+            $e->setTitle($this->backendTransName . _('PHP-CURL not installed'));
+
+            throw $e;
+        }
+
+        $webdavurl = $this->webdavUrl();
+
+        $url = substr($webdavurl, 0, strlen($webdavurl) - strlen("remote.php/webdav/")) . "status.php";
+
+        // try to get the contents of the owncloud status page
+        $ch = curl_init();
+        curl_setopt($ch, CURLOPT_AUTOREFERER, true);
+        curl_setopt($ch, CURLOPT_TIMEOUT, 3); // timeout of 3 seconds
+        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
+        curl_setopt($ch, CURLOPT_URL, $url);
+        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
+        if ($this->allowselfsigned) {
+            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
+            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
+        }
+        $versiondata = curl_exec($ch);
+        $httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+        curl_close($ch);
+
+        if ($httpcode && $httpcode == "200" && $versiondata) {
+            $versions = json_decode($versiondata);
+            $version = $versions->versionstring;
+        }
+        else {
+            $version = "Undetected (no Owncloud?)";
+        }
+
+        return $version;
+    }
 }

plugins/files/php/Files/Backend/Webdav/sabredav/FilesWebDavClient.php

Indentation +111 added lines, -111 removed lines

@@ -9,115 +9,115 @@
 include __DIR__ . "/vendor/autoload.php";
 
 class FilesWebDavClient extends \Sabre\DAV\Client {
-	public function __construct(array $settings) {
-		if (isset($settings['userName'])) {
-			$this->userName = $settings['userName'];
-		}
-		if (isset($settings['password'])) {
-			$this->password = $settings['password'];
-		}
-		parent::__construct($settings);
-	}
-
-	/**
-	 * Performs an actual HTTP request, and returns the result.
-	 *
-	 * If the specified url is relative, it will be expanded based on the base
-	 * url.
-	 *
-	 * The returned array contains 3 keys:
-	 *   * body - the response body
-	 *   * httpCode - a HTTP code (200, 404, etc)
-	 *   * headers - a list of response http headers. The header names have
-	 *     been lowercased.
-	 *
-	 * @param string $url
-	 * @param string $dstpath
-	 * @param array  $headers
-	 *
-	 * @return array
-	 */
-	public function getFile($url = '', $dstpath, $headers = []) {
-		$url = $this->getAbsoluteUrl($url);
-		$file_handle = fopen($dstpath, "w");
-
-		if (!$file_handle) {
-			throw new \Sabre\DAV\Exception('[CURL] Error writing to temporary file! (' . $dstpath . ')');
-		}
-
-		// straight up curl instead of sabredav here, sabredav put's the entire get result in memory
-		$curl = curl_init($url);
-
-		if ($this->verifyPeer !== null) {
-			curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, $this->verifyPeer);
-		}
-		if ($this->trustedCertificates) {
-			curl_setopt($curl, CURLOPT_CAINFO, $this->trustedCertificates);
-		}
-
-		curl_setopt($curl, CURLOPT_USERPWD, $this->userName . ":" . $this->password);
-		curl_setopt($curl, CURLOPT_FILE, $file_handle);
-		curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
-		curl_setopt($curl, CURLOPT_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS);
-		curl_setopt($curl, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS);
-
-		curl_exec($curl);
-
-		$statusCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
-
-		curl_close($curl);
-
-		$response = [
-			'statusCode' => $statusCode,
-		];
-
-		if ($response['statusCode'] >= 400) {
-			switch ($response['statusCode']) {
-				case 400 :
-					throw new \Sabre\DAV\Exception\BadRequest('Bad request');
-
-				case 401 :
-					throw new \Sabre\DAV\Exception\NotAuthenticated('Not authenticated');
-
-				case 402 :
-					throw new \Sabre\DAV\Exception\PaymentRequired('Payment required');
-
-				case 403 :
-					throw new \Sabre\DAV\Exception\Forbidden('Forbidden');
-
-				case 404:
-					throw new \Sabre\DAV\Exception\NotFound('Resource not found.');
-
-				case 405 :
-					throw new \Sabre\DAV\Exception\MethodNotAllowed('Method not allowed');
-
-				case 409 :
-					throw new \Sabre\DAV\Exception\Conflict('Conflict');
-
-				case 412 :
-					throw new \Sabre\DAV\Exception\PreconditionFailed('Precondition failed');
-
-				case 416 :
-					throw new \Sabre\DAV\Exception\RequestedRangeNotSatisfiable('Requested Range Not Satisfiable');
-
-				case 500 :
-					throw new \Sabre\DAV\Exception('Internal server error');
-
-				case 501 :
-					throw new \Sabre\DAV\Exception\NotImplemented('Not Implemented');
-
-				case 507 :
-					throw new \Sabre\DAV\Exception\InsufficientStorage('Insufficient storage');
-
-				default:
-					throw new \Sabre\DAV\Exception('HTTP error response. (errorcode ' . $response['statusCode'] . ')');
-			}
-		}
-
-		return $response;
-	}
-
-	public function uploadChunkedFile($destination, $resource) {
-		return $this->request("PUT", $destination, $resource);
-	}
+    public function __construct(array $settings) {
+        if (isset($settings['userName'])) {
+            $this->userName = $settings['userName'];
+        }
+        if (isset($settings['password'])) {
+            $this->password = $settings['password'];
+        }
+        parent::__construct($settings);
+    }
+
+    /**
+     * Performs an actual HTTP request, and returns the result.
+     *
+     * If the specified url is relative, it will be expanded based on the base
+     * url.
+     *
+     * The returned array contains 3 keys:
+     *   * body - the response body
+     *   * httpCode - a HTTP code (200, 404, etc)
+     *   * headers - a list of response http headers. The header names have
+     *     been lowercased.
+     *
+     * @param string $url
+     * @param string $dstpath
+     * @param array  $headers
+     *
+     * @return array
+     */
+    public function getFile($url = '', $dstpath, $headers = []) {
+        $url = $this->getAbsoluteUrl($url);
+        $file_handle = fopen($dstpath, "w");
+
+        if (!$file_handle) {
+            throw new \Sabre\DAV\Exception('[CURL] Error writing to temporary file! (' . $dstpath . ')');
+        }
+
+        // straight up curl instead of sabredav here, sabredav put's the entire get result in memory
+        $curl = curl_init($url);
+
+        if ($this->verifyPeer !== null) {
+            curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, $this->verifyPeer);
+        }
+        if ($this->trustedCertificates) {
+            curl_setopt($curl, CURLOPT_CAINFO, $this->trustedCertificates);
+        }
+
+        curl_setopt($curl, CURLOPT_USERPWD, $this->userName . ":" . $this->password);
+        curl_setopt($curl, CURLOPT_FILE, $file_handle);
+        curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
+        curl_setopt($curl, CURLOPT_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS);
+        curl_setopt($curl, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS);
+
+        curl_exec($curl);
+
+        $statusCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
+
+        curl_close($curl);
+
+        $response = [
+            'statusCode' => $statusCode,
+        ];
+
+        if ($response['statusCode'] >= 400) {
+            switch ($response['statusCode']) {
+                case 400 :
+                    throw new \Sabre\DAV\Exception\BadRequest('Bad request');
+
+                case 401 :
+                    throw new \Sabre\DAV\Exception\NotAuthenticated('Not authenticated');
+
+                case 402 :
+                    throw new \Sabre\DAV\Exception\PaymentRequired('Payment required');
+
+                case 403 :
+                    throw new \Sabre\DAV\Exception\Forbidden('Forbidden');
+
+                case 404:
+                    throw new \Sabre\DAV\Exception\NotFound('Resource not found.');
+
+                case 405 :
+                    throw new \Sabre\DAV\Exception\MethodNotAllowed('Method not allowed');
+
+                case 409 :
+                    throw new \Sabre\DAV\Exception\Conflict('Conflict');
+
+                case 412 :
+                    throw new \Sabre\DAV\Exception\PreconditionFailed('Precondition failed');
+
+                case 416 :
+                    throw new \Sabre\DAV\Exception\RequestedRangeNotSatisfiable('Requested Range Not Satisfiable');
+
+                case 500 :
+                    throw new \Sabre\DAV\Exception('Internal server error');
+
+                case 501 :
+                    throw new \Sabre\DAV\Exception\NotImplemented('Not Implemented');
+
+                case 507 :
+                    throw new \Sabre\DAV\Exception\InsufficientStorage('Insufficient storage');
+
+                default:
+                    throw new \Sabre\DAV\Exception('HTTP error response. (errorcode ' . $response['statusCode'] . ')');
+            }
+        }
+
+        return $response;
+    }
+
+    public function uploadChunkedFile($destination, $resource) {
+        return $this->request("PUT", $destination, $resource);
+    }
 }

plugins/files/php/Files/Backend/Webdav/cssloader.php

Indentation +24 added lines, -24 removed lines

@@ -7,31 +7,31 @@
 use Files\Backend\AbstractCSSLoader;
 
 class BackendCSSLoader extends AbstractCSSLoader {
-	public function __construct() {
-		$this->CSS_PATH = __DIR__ . "/css/";
-	}
+    public function __construct() {
+        $this->CSS_PATH = __DIR__ . "/css/";
+    }
 
-	/**
-	 * Returns a combined CSS String.
-	 *
-	 * @param bool $debug
-	 *
-	 * @return string
-	 */
-	public function get_combined_css($debug = false) {
-		// Populate the list of directories to check against
-		if (($directoryHandle = opendir($this->CSS_PATH)) !== false) {
-			while (($file = readdir($directoryHandle)) !== false) {
-				// Make sure we're not dealing with a folder or a link to the parent directory
-				if (is_dir($this->CSS_PATH . $file) || ($file == '.' || $file == '..') === true) {
-					continue;
-				}
+    /**
+     * Returns a combined CSS String.
+     *
+     * @param bool $debug
+     *
+     * @return string
+     */
+    public function get_combined_css($debug = false) {
+        // Populate the list of directories to check against
+        if (($directoryHandle = opendir($this->CSS_PATH)) !== false) {
+            while (($file = readdir($directoryHandle)) !== false) {
+                // Make sure we're not dealing with a folder or a link to the parent directory
+                if (is_dir($this->CSS_PATH . $file) || ($file == '.' || $file == '..') === true) {
+                    continue;
+                }
 
-				// Add file content to our buffer
-				$this->cssBuffer .= file_get_contents($this->CSS_PATH . $file);
-			}
-		}
+                // Add file content to our buffer
+                $this->cssBuffer .= file_get_contents($this->CSS_PATH . $file);
+            }
+        }
 
-		return $this->cssBuffer;
-	}
+        return $this->cssBuffer;
+    }
 }

plugins/files/php/Files/Backend/interface.version.php

Indentation +1 added lines, -1 removed lines

@@ -3,5 +3,5 @@
 namespace Files\Backend;
 
 interface iFeatureVersionInfo {
-	public function getServerVersion();
+    public function getServerVersion();
 }

plugins/files/php/Files/Backend/class.abstract_css_loader.php

Indentation +5 added lines, -5 removed lines

@@ -3,11 +3,11 @@
 namespace Files\Backend;
 
 abstract class AbstractCSSLoader {
-	protected $cssBuffer = "";
+    protected $cssBuffer = "";
 
-	// path to css folder
-	protected $CSS_PATH;
+    // path to css folder
+    protected $CSS_PATH;
 
-	// get combined css string
-	abstract public function get_combined_css($debug = false);
+    // get combined css string
+    abstract public function get_combined_css($debug = false);
 }

plugins/files/php/Files/Core/class.exception.php

Indentation +29 added lines, -29 removed lines

@@ -3,36 +3,36 @@
 namespace Files\Core;
 
 class Exception extends \Exception {
-	/**
-	 * The exception title to show as a message box title at client side.
-	 */
-	public $title;
+    /**
+     * The exception title to show as a message box title at client side.
+     */
+    public $title;
 
-	/**
-	 * @constructor
-	 *
-	 * @param string $message The error message
-	 * @param int    $code    The error code
-	 */
-	public function __construct($message, $code = 0) {
-		parent::__construct($message, $code);
-	}
+    /**
+     * @constructor
+     *
+     * @param string $message The error message
+     * @param int    $code    The error code
+     */
+    public function __construct($message, $code = 0) {
+        parent::__construct($message, $code);
+    }
 
-	/**
-	 * Function sets title of an exception that will be sent to the client side
-	 * to show it to user.
-	 *
-	 * @param string $title title of an exception
-	 */
-	public function setTitle($title) {
-		$this->title = $title;
-	}
+    /**
+     * Function sets title of an exception that will be sent to the client side
+     * to show it to user.
+     *
+     * @param string $title title of an exception
+     */
+    public function setTitle($title) {
+        $this->title = $title;
+    }
 
-	/**
-	 * @return string returns title that should be sent to client to display as a message box
-	 *                title
-	 */
-	public function getTitle() {
-		return $this->title;
-	}
+    /**
+     * @return string returns title that should be sent to client to display as a message box
+     *                title
+     */
+    public function getTitle() {
+        return $this->title;
+    }
 }

plugins/files/php/Files/Core/Util/class.arrayutil.php

Indentation +161 added lines, -161 removed lines

@@ -3,165 +3,165 @@
 namespace Files\Core\Util;
 
 class ArrayUtil {
-	/**
-	 * Sort multidimensional array by any key.
-	 *
-	 * @static
-	 *
-	 * @param array  $arr the array to sort
-	 * @param string $key the key to sort
-	 * @param string $dir ASC or DESC sort direction
-	 *
-	 * @return array the sorted array
-	 */
-	public static function sort_by_key($arr, $key, $dir) {
-		global $key2sort;
-		$key2sort = $key;
-
-		if ($dir == "DESC") {
-			usort($arr, ['self', 'invsort']);
-		}
-		else {
-			usort($arr, ['self', 'sort']);
-		}
-
-		return $arr;
-	}
-
-	/**
-	 * Sort multidimensional properties array by any key.
-	 *
-	 * @static
-	 *
-	 * @param array  $arr the array to sort
-	 * @param string $key the key to sort
-	 * @param string $dir ASC or DESC sort direction
-	 *
-	 * @return array the sorted array
-	 */
-	public static function sort_props_by_key($arr, $key, $dir) {
-		global $key2sort;
-		$key2sort = $key;
-
-		if ($dir == "DESC") {
-			usort($arr, ['self', 'invpropsort']);
-		}
-		else {
-			usort($arr, ['self', 'propsort']);
-		}
-
-		return $arr;
-	}
-
-	/**
-	 * compare function for multidimensional array sorting.
-	 *
-	 * @static
-	 *
-	 * @param array $a this argument will be compared with argument $b
-	 * @param array $b this argument will be compared with argument $a
-	 *
-	 * @return int compare value. If $a < $b the return value will be -1.
-	 */
-	public static function sort($a, $b) {
-		global $key2sort;
-
-		if ($a['isFolder'] == $b['isFolder']) {
-			if (is_numeric($a[$key2sort]) && is_numeric($b[$key2sort])) {
-				if ($a[$key2sort] == $b[$key2sort]) {
-					return 0;
-				}
-
-				return ($a[$key2sort] < $b[$key2sort]) ? -1 : 1;
-			}
-
-			return strcasecmp($a[$key2sort], $b[$key2sort]);
-		}
-
-		return (int) $a['isFolder'] - (int) $b['isFolder'];
-	}
-
-	/**
-	 * inverse compare function for multidimensional array sorting.
-	 *
-	 * @static
-	 *
-	 * @param array $a this argument will be compared with argument $b
-	 * @param array $b this argument will be compared with argument $a
-	 *
-	 * @return int compare value. If $a < $b the return value will be 1.
-	 */
-	public static function invsort($a, $b) {
-		global $key2sort;
-
-		if ($a['isFolder'] == $b['isFolder']) {
-			if (is_numeric($a[$key2sort]) && is_numeric($b[$key2sort])) {
-				if ($a[$key2sort] == $b[$key2sort]) {
-					return 0;
-				}
-
-				return ($a[$key2sort] < $b[$key2sort]) ? 1 : -1;
-			}
-
-			return -1 * strcasecmp($a[$key2sort], $b[$key2sort]);
-		}
-
-		return (int) $b['isFolder'] - (int) $a['isFolder'];
-	}
-
-	/**
-	 * compare function for multidimensional array sorting.
-	 *
-	 * @static
-	 *
-	 * @param array $a this argument will be compared with argument $b
-	 * @param array $b this argument will be compared with argument $a
-	 *
-	 * @return int compare value. If $a < $b the return value will be -1.
-	 */
-	public static function propsort($a, $b) {
-		global $key2sort;
-
-		if ($a['props']['type'] == $b['props']['type']) {
-			if (is_numeric($a['props'][$key2sort]) && is_numeric($b['props'][$key2sort])) {
-				if ($a['props'][$key2sort] == $b['props'][$key2sort]) {
-					return 0;
-				}
-
-				return ($a['props'][$key2sort] < $b['props'][$key2sort]) ? -1 : 1;
-			}
-
-			return strcasecmp($a['props'][$key2sort], $b['props'][$key2sort]);
-		}
-
-		return $a['props']['type'] - $b['props']['type'];
-	}
-
-	/**
-	 * inverse compare function for multidimensional array sorting.
-	 *
-	 * @static
-	 *
-	 * @param array $a this argument will be compared with argument $b
-	 * @param array $b this argument will be compared with argument $a
-	 *
-	 * @return int compare value. If $a < $b the return value will be 1.
-	 */
-	public static function invpropsort($a, $b) {
-		global $key2sort;
-
-		if ($a['props']['type'] == $b['props']['type']) {
-			if (is_numeric($a['props'][$key2sort]) && is_numeric($b['props'][$key2sort])) {
-				if ($a['props'][$key2sort] == $b['props'][$key2sort]) {
-					return 0;
-				}
-
-				return ($a['props'][$key2sort] < $b['props'][$key2sort]) ? 1 : -1;
-			}
-
-			return -1 * strcasecmp($a['props'][$key2sort], $b['props'][$key2sort]);
-		}
-
-		return $b['props']['type'] - $a['props']['type'];
-	}
+    /**
+     * Sort multidimensional array by any key.
+     *
+     * @static
+     *
+     * @param array  $arr the array to sort
+     * @param string $key the key to sort
+     * @param string $dir ASC or DESC sort direction
+     *
+     * @return array the sorted array
+     */
+    public static function sort_by_key($arr, $key, $dir) {
+        global $key2sort;
+        $key2sort = $key;
+
+        if ($dir == "DESC") {
+            usort($arr, ['self', 'invsort']);
+        }
+        else {
+            usort($arr, ['self', 'sort']);
+        }
+
+        return $arr;
+    }
+
+    /**
+     * Sort multidimensional properties array by any key.
+     *
+     * @static
+     *
+     * @param array  $arr the array to sort
+     * @param string $key the key to sort
+     * @param string $dir ASC or DESC sort direction
+     *
+     * @return array the sorted array
+     */
+    public static function sort_props_by_key($arr, $key, $dir) {
+        global $key2sort;
+        $key2sort = $key;
+
+        if ($dir == "DESC") {
+            usort($arr, ['self', 'invpropsort']);
+        }
+        else {
+            usort($arr, ['self', 'propsort']);
+        }
+
+        return $arr;
+    }
+
+    /**
+     * compare function for multidimensional array sorting.
+     *
+     * @static
+     *
+     * @param array $a this argument will be compared with argument $b
+     * @param array $b this argument will be compared with argument $a
+     *
+     * @return int compare value. If $a < $b the return value will be -1.
+     */
+    public static function sort($a, $b) {
+        global $key2sort;
+
+        if ($a['isFolder'] == $b['isFolder']) {
+            if (is_numeric($a[$key2sort]) && is_numeric($b[$key2sort])) {
+                if ($a[$key2sort] == $b[$key2sort]) {
+                    return 0;
+                }
+
+                return ($a[$key2sort] < $b[$key2sort]) ? -1 : 1;
+            }
+
+            return strcasecmp($a[$key2sort], $b[$key2sort]);
+        }
+
+        return (int) $a['isFolder'] - (int) $b['isFolder'];
+    }
+
+    /**
+     * inverse compare function for multidimensional array sorting.
+     *
+     * @static
+     *
+     * @param array $a this argument will be compared with argument $b
+     * @param array $b this argument will be compared with argument $a
+     *
+     * @return int compare value. If $a < $b the return value will be 1.
+     */
+    public static function invsort($a, $b) {
+        global $key2sort;
+
+        if ($a['isFolder'] == $b['isFolder']) {
+            if (is_numeric($a[$key2sort]) && is_numeric($b[$key2sort])) {
+                if ($a[$key2sort] == $b[$key2sort]) {
+                    return 0;
+                }
+
+                return ($a[$key2sort] < $b[$key2sort]) ? 1 : -1;
+            }
+
+            return -1 * strcasecmp($a[$key2sort], $b[$key2sort]);
+        }
+
+        return (int) $b['isFolder'] - (int) $a['isFolder'];
+    }
+
+    /**
+     * compare function for multidimensional array sorting.
+     *
+     * @static
+     *
+     * @param array $a this argument will be compared with argument $b
+     * @param array $b this argument will be compared with argument $a
+     *
+     * @return int compare value. If $a < $b the return value will be -1.
+     */
+    public static function propsort($a, $b) {
+        global $key2sort;
+
+        if ($a['props']['type'] == $b['props']['type']) {
+            if (is_numeric($a['props'][$key2sort]) && is_numeric($b['props'][$key2sort])) {
+                if ($a['props'][$key2sort] == $b['props'][$key2sort]) {
+                    return 0;
+                }
+
+                return ($a['props'][$key2sort] < $b['props'][$key2sort]) ? -1 : 1;
+            }
+
+            return strcasecmp($a['props'][$key2sort], $b['props'][$key2sort]);
+        }
+
+        return $a['props']['type'] - $b['props']['type'];
+    }
+
+    /**
+     * inverse compare function for multidimensional array sorting.
+     *
+     * @static
+     *
+     * @param array $a this argument will be compared with argument $b
+     * @param array $b this argument will be compared with argument $a
+     *
+     * @return int compare value. If $a < $b the return value will be 1.
+     */
+    public static function invpropsort($a, $b) {
+        global $key2sort;
+
+        if ($a['props']['type'] == $b['props']['type']) {
+            if (is_numeric($a['props'][$key2sort]) && is_numeric($b['props'][$key2sort])) {
+                if ($a['props'][$key2sort] == $b['props'][$key2sort]) {
+                    return 0;
+                }
+
+                return ($a['props'][$key2sort] < $b['props'][$key2sort]) ? 1 : -1;
+            }
+
+            return -1 * strcasecmp($a['props'][$key2sort], $b['props'][$key2sort]);
+        }
+
+        return $b['props']['type'] - $a['props']['type'];
+    }
 }