<?php
/**
 * ownCloud
 *
 * @author Florin Peter
 * @copyright 2013 Florin Peter <owncloud@florin-peter.de>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or any later version.
 *
 * This library 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 library.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

require_once __DIR__ . '/../../../lib/base.php';
require_once __DIR__ . '/../lib/crypt.php';
require_once __DIR__ . '/../lib/keymanager.php';
require_once __DIR__ . '/../lib/proxy.php';
require_once __DIR__ . '/../lib/stream.php';
require_once __DIR__ . '/../lib/util.php';
require_once __DIR__ . '/../appinfo/app.php';
require_once __DIR__ . '/util.php';

use OCA\Encryption;

/**
 * Class Test_Encryption_Webdav
 * @brief this class provide basic webdav tests for PUT,GET and DELETE
 */
class Test_Encryption_Webdav extends \PHPUnit_Framework_TestCase {

	const TEST_ENCRYPTION_WEBDAV_USER1 = "test-webdav-user1";

	public $userId;
	public $pass;
	/**
	 * @var \OC_FilesystemView
	 */
	public $view;
	public $dataShort;
	public $stateFilesTrashbin;

	public static function setUpBeforeClass() {
		// reset backend
		\OC_User::clearBackends();
		\OC_User::useBackend('database');

		// Filesystem related hooks
		\OCA\Encryption\Helper::registerFilesystemHooks();

		// Filesystem related hooks
		\OCA\Encryption\Helper::registerUserHooks();

		// clear and register hooks
		\OC_FileProxy::clearProxies();
		\OC_FileProxy::register(new OCA\Encryption\Proxy());

		// create test user
		\Test_Encryption_Util::loginHelper(\Test_Encryption_Webdav::TEST_ENCRYPTION_WEBDAV_USER1, true);
	}

	function setUp() {
		// reset backend
		\OC_User::useBackend('database');

		// set user id
		\OC_User::setUserId(\Test_Encryption_Webdav::TEST_ENCRYPTION_WEBDAV_USER1);
		$this->userId = \Test_Encryption_Webdav::TEST_ENCRYPTION_WEBDAV_USER1;
		$this->pass = \Test_Encryption_Webdav::TEST_ENCRYPTION_WEBDAV_USER1;

		// init filesystem view
		$this->view = new \OC_FilesystemView('/');

		// init short data
		$this->dataShort = 'hats';

		// remember files_trashbin state
		$this->stateFilesTrashbin = OC_App::isEnabled('files_trashbin');

		// we don't want to tests with app files_trashbin enabled
		\OC_App::disable('files_trashbin');

		// create test user
		\Test_Encryption_Util::loginHelper(\Test_Encryption_Webdav::TEST_ENCRYPTION_WEBDAV_USER1);
	}

	function tearDown() {
		// reset app files_trashbin
		if ($this->stateFilesTrashbin) {
			OC_App::enable('files_trashbin');
		}
		else {
			OC_App::disable('files_trashbin');
		}
	}

	public static function tearDownAfterClass() {
		// cleanup test user
		\OC_User::deleteUser(\Test_Encryption_Webdav::TEST_ENCRYPTION_WEBDAV_USER1);
	}

	/**
	 * @brief test webdav put random file
	 */
	function testWebdavPUT() {

		// generate filename
		$filename = '/tmp-' . uniqid() . '.txt';

		// set server vars
		$_SERVER['REQUEST_METHOD'] = 'OPTIONS';

		$_SERVER['REQUEST_METHOD'] = 'PUT';
		$_SERVER['REQUEST_URI'] = '/remote.php/webdav' . $filename;
		$_SERVER['HTTP_AUTHORIZATION'] = 'Basic dGVzdC13ZWJkYXYtdXNlcjE6dGVzdC13ZWJkYXYtdXNlcjE=';
		$_SERVER['CONTENT_TYPE'] = 'application/octet-stream';
		$_SERVER['PATH_INFO'] = '/webdav' . $filename;
		$_SERVER['CONTENT_LENGTH'] = strlen($this->dataShort);

		// handle webdav request
		$this->handleWebdavRequest($this->dataShort);

		// check if file was created
		$this->assertTrue($this->view->file_exists('/' . $this->userId . '/files' . $filename));

		// check if key-file was created
		$this->assertTrue($this->view->file_exists(
			'/' . $this->userId . '/files_encryption/keyfiles/' . $filename . '.key'));

		// check if shareKey-file was created
		$this->assertTrue($this->view->file_exists(
			'/' . $this->userId . '/files_encryption/share-keys/' . $filename . '.' . $this->userId . '.shareKey'));

		// disable encryption proxy to prevent recursive calls
		$proxyStatus = \OC_FileProxy::$enabled;
		\OC_FileProxy::$enabled = false;

		// get encrypted file content
		$encryptedContent = $this->view->file_get_contents('/' . $this->userId . '/files' . $filename);

		// restore proxy state
		\OC_FileProxy::$enabled = $proxyStatus;

		// check if encrypted content is valid
		$this->assertTrue(Encryption\Crypt::isCatfileContent($encryptedContent));

		// get decrypted file contents
		$decrypt = file_get_contents('crypt:///' . $this->userId . '/files'. $filename);

		// check if file content match with the written content
		$this->assertEquals($this->dataShort, $decrypt);

		// return filename for next test
		return $filename;
	}

	/**
	 * @brief test webdav get random file
	 *
	 * @depends testWebdavPUT
	 */
	function testWebdavGET($filename) {

		// set server vars
		$_SERVER['REQUEST_METHOD'] = 'GET';
		$_SERVER['REQUEST_URI'] = '/remote.php/webdav' . $filename;
		$_SERVER['HTTP_AUTHORIZATION'] = 'Basic dGVzdC13ZWJkYXYtdXNlcjE6dGVzdC13ZWJkYXYtdXNlcjE=';
		$_SERVER['PATH_INFO'] = '/webdav' . $filename;

		// handle webdav request
		$content = $this->handleWebdavRequest();

		// check if file content match with the written content
		$this->assertEquals($this->dataShort, $content);

		// return filename for next test
		return $filename;
	}

	/**
	 * @brief test webdav delete random file
	 * @depends testWebdavGET
	 */
	function testWebdavDELETE($filename) {
		// set server vars
		$_SERVER['REQUEST_METHOD'] = 'DELETE';
		$_SERVER['REQUEST_URI'] = '/remote.php/webdav' . $filename;
		$_SERVER['HTTP_AUTHORIZATION'] = 'Basic dGVzdC13ZWJkYXYtdXNlcjE6dGVzdC13ZWJkYXYtdXNlcjE=';
		$_SERVER['PATH_INFO'] = '/webdav' . $filename;

		// handle webdav request
		$content = $this->handleWebdavRequest();

		// check if file was removed
		$this->assertFalse($this->view->file_exists('/' . $this->userId . '/files' . $filename));

		// check if key-file was removed
		$this->assertFalse($this->view->file_exists(
			'/' . $this->userId . '/files_encryption/keyfiles' . $filename . '.key'));

		// check if shareKey-file was removed
		$this->assertFalse($this->view->file_exists(
			'/' . $this->userId . '/files_encryption/share-keys' . $filename . '.' . $this->userId . '.shareKey'));
	}

	/**
	 * @brief handle webdav request
	 *
	 * @param bool $body
	 *
	 * @note this init procedure is copied from /apps/files/appinfo/remote.php
	 */
	function handleWebdavRequest($body = false) {
		// Backends
		$authBackend = new OC_Connector_Sabre_Auth();
		$lockBackend = new OC_Connector_Sabre_Locks();
		$requestBackend = new OC_Connector_Sabre_Request();

		// Create ownCloud Dir
		$publicDir = new OC_Connector_Sabre_Directory('');

		// Fire up server
		$server = new Sabre_DAV_Server($publicDir);
		$server->httpRequest = $requestBackend;
		$server->setBaseUri('/remote.php/webdav/');

		// Load plugins
		$server->addPlugin(new Sabre_DAV_Auth_Plugin($authBackend, 'ownCloud'));
		$server->addPlugin(new Sabre_DAV_Locks_Plugin($lockBackend));
		$server->addPlugin(new Sabre_DAV_Browser_Plugin(false)); // Show something in the Browser, but no upload
		$server->addPlugin(new OC_Connector_Sabre_QuotaPlugin());
		$server->addPlugin(new OC_Connector_Sabre_MaintenancePlugin());

		// And off we go!
		if ($body) {
			$server->httpRequest->setBody($body);
		}

		// turn on output buffering
		ob_start();

		// handle request
		$server->exec();

		// file content is written in the output buffer
		$content = ob_get_contents();

		// flush the output buffer and turn off output buffering
		ob_end_clean();

		// return captured content
		return $content;
	}
}