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<?php

/*
* This file is a part of PHPAX-RS framework, released under terms of GPL-3.0
* licence. Copyright (c) 2014, UnArt Slavičín, o.s. All rights reserved.
*/

namespace phpaxrs\http;

/**
* The "ResponseBuilder" class for easy building of HTTP request.
*
* @author Ondřej Fibich <ondrej.fibich@gmail.com>
*/
class ResponseBuilder {
/**
* Builded HTTP response object.
*
* @var HttpResponse
*/
private $response;
/**
* Creates builder with response.
*
* @param int $status_code
*/
protected function __construct($status_code) {
$this->response = new HttpResponse($status_code);
}
/**
* Sets HTTP response body.
*
* @param mixed $entity body entity
* @return \phpaxrs\http\ResponseBuilder
*/
public function body($entity) {
$this->response->set_body($entity);
return $this;
}
/**
* Adds HTTP response header.
*
* @param string $name
* @param string $value
* @return \phpaxrs\http\ResponseBuilder
*/
public function header($name, $value) {
$this->response->add_header($name, $value);
return $this;
}
/**
* Builds output response.
*
* @return HttpResponse
*/
public function build() {
return $this->response;
}

// static creator methods

/**
* Creates a new response builder.
*
* @param int $status response status code [optional]
* @param mixed $entity response body [optional]
* @return ResponseBuilder
*/
public static function create($status = 200, $entity = NULL) {
$rb = new ResponseBuilder($status);
if ($entity !== NULL) {
$rb->body($entity);
if (is_string($entity) && $status >= 400) {
$rb->header('Content-Type', 'text/plain');
}
}
return $rb;
}
/**
* Success.
*
* @param mixed $entity response entity [optional]
* @return \phpaxrs\http\HttpResponse
*/
public static function ok($entity = NULL) {
return self::create(200, $entity)->build();
}
/**
* Created.
*
* @param string $location_header location header of created [optional]
* @return \phpaxrs\http\HttpResponse
*/
public static function created($location_header = NULL) {
$rb = self::create(201);
if (!empty($location_header)) {
$rb->header('Location', $location_header);
}
return $rb->build();
}
/**
* Success but no content available.
*
* @return \phpaxrs\http\HttpResponse
*/
public static function no_content() {
return self::create(204)->build();
}

/**
* Invalid request.
*
* @param string $message [optional]
* @return \phpaxrs\http\HttpResponse
*/
public static function bad_request($message = NULL) {
return self::create(400, $message)->build();
}
/**
* Not found.
*
* @param string $message [optional]
* @return \phpaxrs\http\HttpResponse
*/
public static function not_found($message = NULL) {
return self::create(404, $message)->build();
}
/**
* REST API for serving exists but does not populate any of accepted MIME
* types.
*
* @return \phpaxrs\http\HttpResponse
*/
public static function not_acceptable() {
return self::create(406)->build();
}
/**
* Unsupported content sended with request.
*
* @return \phpaxrs\http\HttpResponse
*/
public static function unsupported_media() {
return self::create(415)->build();
}
/**
* Server error response with message contained as response body.
*
* @param \Exception|string $ex [optional]
* @return \phpaxrs\http\HttpResponse
*/
public static function server_error($ex = NULL) {
$m = NULL;
if ($ex !== NULL) {
$m = ($ex instanceof \Exception) ? $ex->getMessage() : strval($ex);
}
return self::create(500, $m)->build();
}

}
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