<?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 realpath( dirname( __FILE__ ) . '/../../../lib/base.php' );
require_once realpath( dirname( __FILE__ ) . '/../lib/crypt.php' );
require_once realpath( dirname( __FILE__ ) . '/../lib/keymanager.php' );
require_once realpath( dirname( __FILE__ ) . '/../lib/proxy.php' );
require_once realpath( dirname( __FILE__ ) . '/../lib/stream.php' );
require_once realpath( dirname( __FILE__ ) . '/../lib/util.php' );
require_once realpath( dirname( __FILE__ ) . '/../appinfo/app.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
{

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

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

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

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

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

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

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

		// 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' );

		// init filesystem for user
		\OC_Util::tearDownFS();
		\OC_User::setUserId( '' );
		\OC\Files\Filesystem::tearDown();
		\OC_Util::setupFS( $this->userId );
		\OC_User::setUserId( $this->userId );

		// login user
		$params['uid'] = $this->userId;
		$params['password'] = $this->pass;
		OCA\Encryption\Hooks::login( $params );
	}

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

		// clear and register hooks
		\OC_FileProxy::clearProxies();
	}

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

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

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

		$_SERVER['REQUEST_METHOD'] = 'PUT';
		$_SERVER['REQUEST_URI'] = '/remote.php/webdav' . $filename;
		$_SERVER['HTTP_AUTHORIZATION'] = 'Basic YWRtaW46YWRtaW4=';
		$_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://' . $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 YWRtaW46YWRtaW4=';
		$_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 YWRtaW46YWRtaW4=';
		$_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/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;
	}
}