<?php

/**
 * @package phprouter
 */

namespace phprouter;

/**
 * Class used to send HTTP response to client
 * @package phprouter
 * @see Http
 * @see Router
 * @see Request
 */
abstract class Response
{
	/**
	 * HTTP status code to return to client
	 * @var integer
	 * @access private
	 * @see status()
	 */
	static $status_code = 200;

	/**
	 * Send a raw HTTP header
	 * @param string $name Header name
	 * @param string $value Header value
	 * @param boolean $replace Whether the header should replace a
	 * previous similar header, or add a second header of the same type
	 */
	static function header( $name, $value, $replace = true )
	{
		header( $name . ': ' . $value, (bool) $replace );
	}

	/**
	 * Set response status code
	 * @param integer $status_code
	 * @throws InvalidArgumentException on invalid HTTP status code
	 * @see Http::$status_codes
	 */
	static function status( $status_code )
	{
		if ( !isset( Http::$status_codes[ $status_code ] ) )
		{
			throw new \InvalidArgumentException( 'Invalid HTTP status code' );
		}

		$http_reason_phrase = Http::$status_codes[ $status_code ];

		if ( PHP_SAPI == 'cgi_fcgi' )
		{
			$header = 'Status: ' . $http_reason_phrase;
		}
		else
		{
			$header = Request::server_protocol() . ' ' . $http_reason_phrase;
		}

		header( $header, true, $status_code );

		self::$status_code = $status_code;
	}
}

/* EOF */