<?php
/*
 * Copyright (c) 2010 by Justin Otherguy <justin@justinotherguy.org>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License (either version 2 or
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * For more information on the GPL, please go to:
 * http://www.gnu.org/copyleft/gpl.html
 */

namespace Volkszaehler\View\Http;

/*
 * simple class to control the output buffering
 */
class Response {
	protected $headers = array();
	protected $code = 200;	// default code (OK)
	
	protected static $codes = array(
		100 => 'Continue',
		101 => 'Switching Protocols',
		200 => 'OK',						// success
		201 => 'Created',
		202 => 'Accepted',
		203 => 'Non-Authoritative Information',
		204 => 'No Content',
		205 => 'Reset Content',
		206 => 'Partial Content',
		300 => 'Multiple Choicesv',
		301 => 'Moved Permanently',			// redirection
		302 => 'Found',
		303 => 'See Other',
		304 => 'Not Modified',
		305 => 'Use Proxy',
		307 => 'Temporary Redirect',
		400 => 'Bad Request',				// client error
		401 => 'Unauthorized',
		402 => 'Payment Required',
		403 => 'Forbidden',
		404 => 'Not Found',
		405 => 'Method Not Allowed',
		406 => 'Not Acceptable',
		407 => 'Proxy Authentication Required',
		408 => 'Request Timeout',
		409 => 'Conflict',
		410 => 'Gone',
		411 => 'Length Required',
		412 => 'Precondition Failed',
		413 => 'Request Entity Too Large',
		414 => 'Request-URI Too Long',
		415 => 'Unsupported Media Type',
		416 => 'Requested Range Not Satisfiable',
		417 => 'Expectation Failed',
		500 => 'Internal Server Error',		// server error
		501 => 'Not Implemented',
		502 => 'Bad Gateway',
		503 => 'Service Unavailable',
		504 => 'Gateway Timeout',
		505 => 'HTTP Version Not Supported'
	);
	
	/*
	 * constructor
	 */
	public function __construct() {
		$this->headers = apache_response_headers();
		
		ob_start(array($this, 'obCallback'));
	}
	
	public function obCallback($output) {
		return $output;	// simple passthrough
	}
	
	public function send() {
		// change returncode
		header('HTTP/1.1 ' . $this->code . ' ' . self::getCodeDescription($this->code));
		
		// send headers
		foreach ($this->headers as $name => $value) {
			header($name . ': ' . $value);
		}
		ob_end_flush();
	}
	
	/*
	 * setter & getter
	 */
	public function setHeader($header, $value) { $this->headers[$header] = $value; }
	public function getHeader($header) { return $this->headers[$header]; }
	public function getCode() { return $this->code; }
	public function setCode($code) { $this->code = $code; }
	static public function getCodeDescription($code) {
		return (isset(self::$codes[$code])) ? self::$codes[$code] : false;
	}
}