<?php
/**
 * @copyright Copyright (c) 2016, ownCloud, Inc.
 *
 * @author Bernhard Posselt <dev@bernhard-posselt.com>
 * @author Morris Jobke <hey@morrisjobke.de>
 * @author Stefan Weil <sw@weilnetz.de>
 * @author Thomas Müller <thomas.mueller@tmit.eu>
 *
 * @license AGPL-3.0
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * 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, version 3,
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 *
 */

/**
 * Public interface of ownCloud for apps to use.
 * AppFramework\Controller class
 */

namespace OCP\AppFramework;

use OCP\AppFramework\Http\DataResponse;
use OCP\AppFramework\Http\OCSResponse;
use OCP\AppFramework\Http\Response;
use OCP\IRequest;


/**
 * Base class to inherit your controllers from that are used for RESTful APIs
 * @since 8.1.0
 */
abstract class OCSController extends ApiController {

	/** @var int */
	private $ocsVersion;

	/**
	 * constructor of the controller
	 * @param string $appName the name of the app
	 * @param IRequest $request an instance of the request
	 * @param string $corsMethods comma separated string of HTTP verbs which
	 * should be allowed for websites or webapps when calling your API, defaults to
	 * 'PUT, POST, GET, DELETE, PATCH'
	 * @param string $corsAllowedHeaders comma separated string of HTTP headers
	 * which should be allowed for websites or webapps when calling your API,
	 * defaults to 'Authorization, Content-Type, Accept'
	 * @param int $corsMaxAge number in seconds how long a preflighted OPTIONS
	 * request should be cached, defaults to 1728000 seconds
	 * @since 8.1.0
	 */
	public function __construct($appName,
								IRequest $request,
								$corsMethods='PUT, POST, GET, DELETE, PATCH',
								$corsAllowedHeaders='Authorization, Content-Type, Accept',
								$corsMaxAge=1728000){
		parent::__construct($appName, $request, $corsMethods,
							$corsAllowedHeaders, $corsMaxAge);
		$this->registerResponder('json', function ($data) {
			return $this->buildOCSResponse('json', $data);
		});
		$this->registerResponder('xml', function ($data) {
			return $this->buildOCSResponse('xml', $data);
		});
	}

	/**
	 * @param int $version
	 * @since 9.2.0
	 * @internal
	 */
	public function setOCSVersion($version) {
		$this->ocsVersion = $version;
	}

	/**
	 * Since the OCS endpoints default to XML we need to find out the format
	 * again
	 * @param mixed $response the value that was returned from a controller and
	 * is not a Response instance
	 * @param string $format the format for which a formatter has been registered
	 * @throws \DomainException if format does not match a registered formatter
	 * @return Response
	 * @since 9.1.0
	 */
	public function buildResponse($response, $format = 'xml') {
		return parent::buildResponse($response, $format);
	}

	/**
	 * Unwrap data and build ocs response
	 * @param string $format json or xml
	 * @param DataResponse $data the data which should be transformed
	 * @since 8.1.0
	 * @return \OC\AppFramework\OCS\BaseResponse
	 */
	private function buildOCSResponse($format, DataResponse $data) {
		if ($this->ocsVersion === 1) {
			return new \OC\AppFramework\OCS\V1Response($data, $format);
		}
		return new \OC\AppFramework\OCS\V2Response($data, $format);
	}

}