<?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' );
require_once realpath( dirname( __FILE__ ) . '/../../files_trashbin/appinfo/app.php' );

use OCA\Encryption;

/**
 * Class Test_Encryption_Trashbin
 * @brief this class provide basic trashbin app tests
 */
class Test_Encryption_Trashbin extends \PHPUnit_Framework_TestCase
{

	public $userId;
	public $pass;
	/**
	 * @var \OC_FilesystemView
	 */
	public $view;
	public $dataShort;
	public $stateFilesTrashbin;
	public $folder1;
	public $subfolder;
	public $subsubfolder;

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

		\OC_Hook::clear( 'OC_Filesystem' );
		\OC_Hook::clear( 'OC_User' );

		// trashbin hooks
		\OCA\Files_Trashbin\Trashbin::registerHooks();

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

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

		// setup filesystem
		\OC_Util::tearDownFS();
		\OC_User::setUserId( '' );
		\OC\Files\Filesystem::tearDown();
		\OC_Util::setupFS( 'admin' );
		\OC_User::setUserId( 'admin' );

		// login admin
		$params['uid'] = 'admin';
		$params['password'] = 'admin';
		OCA\Encryption\Hooks::login( $params );
	}

	function setUp() {
		// 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';

		$this->folder1 = '/folder1';
		$this->subfolder = '/subfolder1';
		$this->subsubfolder = '/subsubfolder1';

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

		// we want to tests with app files_trashbin enabled
		\OC_App::enable( 'files_trashbin' );
	}

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

	public static function tearDownAfterClass() {

	}

	/**
	 * @brief test delete file
	 */
	function testDeleteFile() {

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

		// save file with content
		$cryptedFile = file_put_contents( 'crypt:///' . $filename, $this->dataShort );

		// test that data was successfully written
		$this->assertTrue( is_int( $cryptedFile ) );

		// check if key for admin exists
		$this->assertTrue( $this->view->file_exists( '/admin/files_encryption/keyfiles/' . $filename . '.key' ) );

		// check if share key for admin exists
		$this->assertTrue( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $filename . '.admin.shareKey' ) );

		// delete file
		\OC\FIles\Filesystem::unlink( $filename );

		// check if file not exists
		$this->assertFalse( $this->view->file_exists( '/admin/files/' . $filename ) );

		// check if key for admin not exists
		$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/keyfiles/' . $filename . '.key' ) );

		// check if share key for admin not exists
		$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $filename . '.admin.shareKey' ) );

		// get files
		$trashFiles = $this->view->getDirectoryContent( '/admin/files_trashbin/files/' );

		$trashFileSuffix = null;
		// find created file with timestamp
		foreach ( $trashFiles as $file ) {
			if ( strncmp( $file['path'], $filename, strlen( $filename ) ) ) {
				$path_parts = pathinfo( $file['name'] );
				$trashFileSuffix = $path_parts['extension'];
			}
		}

		// check if we found the file we created
		$this->assertNotNull( $trashFileSuffix );

		// check if key for admin not exists
		$this->assertTrue( $this->view->file_exists( '/admin/files_trashbin/keyfiles/' . $filename . '.key.' . $trashFileSuffix ) );

		// check if share key for admin not exists
		$this->assertTrue( $this->view->file_exists( '/admin/files_trashbin/share-keys/' . $filename . '.admin.shareKey.' . $trashFileSuffix ) );

		// return filename for next test
		return $filename . '.' . $trashFileSuffix;
	}

	/**
	 * @brief test restore file
	 *
	 * @depends testDeleteFile
	 */
	function testRestoreFile( $filename ) {

		// prepare file information
		$path_parts = pathinfo( $filename );
		$trashFileSuffix = $path_parts['extension'];
		$timestamp = str_replace( 'd', '', $trashFileSuffix );
		$fileNameWithoutSuffix = str_replace( '.' . $trashFileSuffix, '', $filename );

		// restore file
		$this->assertTrue( \OCA\Files_Trashbin\Trashbin::restore( $filename, $fileNameWithoutSuffix, $timestamp ) );

		// check if file exists
		$this->assertTrue( $this->view->file_exists( '/admin/files/' . $fileNameWithoutSuffix ) );

		// check if key for admin exists
		$this->assertTrue( $this->view->file_exists( '/admin/files_encryption/keyfiles/' . $fileNameWithoutSuffix . '.key' ) );

		// check if share key for admin exists
		$this->assertTrue( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $fileNameWithoutSuffix . '.admin.shareKey' ) );
	}

	/**
	 * @brief test delete file forever
	 */
	function testPermanentDeleteFile() {

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

		// save file with content
		$cryptedFile = file_put_contents( 'crypt:///' . $filename, $this->dataShort );

		// test that data was successfully written
		$this->assertTrue( is_int( $cryptedFile ) );

		// check if key for admin exists
		$this->assertTrue( $this->view->file_exists( '/admin/files_encryption/keyfiles/' . $filename . '.key' ) );

		// check if share key for admin exists
		$this->assertTrue( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $filename . '.admin.shareKey' ) );

		// delete file
		\OC\FIles\Filesystem::unlink( $filename );

		// check if file not exists
		$this->assertFalse( $this->view->file_exists( '/admin/files/' . $filename ) );

		// check if key for admin not exists
		$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/keyfiles/' . $filename . '.key' ) );

		// check if share key for admin not exists
		$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $filename . '.admin.shareKey' ) );

		// find created file with timestamp
		$query = \OC_DB::prepare( 'SELECT `timestamp`,`type` FROM `*PREFIX*files_trash`'
			. ' WHERE `id`=?' );
		$result = $query->execute( array( $filename ) )->fetchRow();

		$this->assertTrue( is_array( $result ) );

		// build suffix
		$trashFileSuffix = 'd' . $result['timestamp'];

		// check if key for admin exists
		$this->assertTrue( $this->view->file_exists( '/admin/files_trashbin/keyfiles/' . $filename . '.key.' . $trashFileSuffix ) );

		// check if share key for admin exists
		$this->assertTrue( $this->view->file_exists( '/admin/files_trashbin/share-keys/' . $filename . '.admin.shareKey.' . $trashFileSuffix ) );

		// get timestamp from file
		$timestamp = str_replace( 'd', '', $trashFileSuffix );

		// delete file forever
		$this->assertGreaterThan( 0, \OCA\Files_Trashbin\Trashbin::delete( $filename, $timestamp ) );

		// check if key for admin not exists
		$this->assertFalse( $this->view->file_exists( '/admin/files_trashbin/files/' . $filename . '.' . $trashFileSuffix ) );

		// check if key for admin not exists
		$this->assertFalse( $this->view->file_exists( '/admin/files_trashbin/keyfiles/' . $filename . '.key.' . $trashFileSuffix ) );

		// check if share key for admin not exists
		$this->assertFalse( $this->view->file_exists( '/admin/files_trashbin/share-keys/' . $filename . '.admin.shareKey.' . $trashFileSuffix ) );
	}

}