move backends into their own namespace and add support for multiple auth methods

src/ServerFactory.php

@@ -0,0 +1,64 @@
+<?php
+/**
+ * @copyright Copyright (c) 2018 Robin Appelman <robin@icewind.nl>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace Icewind\SMB;
+
+
+use Icewind\SMB\Exception\DependencyException;
+use Icewind\SMB\Native\NativeServer;
+use Icewind\SMB\Wrapped\Server;
+
+class ServerFactory {
+	const BACKENDS = [
+		NativeServer::class,
+		Server::class
+	];
+
+	/** @var System|null */
+	private $system = null;
+
+	/**
+	 * @param $host
+	 * @param IAuth $credentials
+	 * @return IServer
+	 * @throws DependencyException
+	 */
+	public function createServer($host, IAuth $credentials) {
+		foreach (self::BACKENDS as $backend) {
+			if (call_user_func("$backend::available", $this->getSystem())) {
+				return new $backend($host, $credentials, $this->getSystem(), new TimeZoneProvider($host, $this->getSystem()));
+			}
+		}
+
+		throw new DependencyException('No valid backend available, ensure smbclient is in the path or php-smbclient is installed');
+	}
+
+	/**
+	 * @return System
+	 */
+	private function getSystem() {
+		if (is_null($this->system)) {
+			$this->system = new System();
+		}
+
+		return $this->system;
+	}
+}