<?php

namespace Proxy\Http;

use Proxy\Http\ParamStore;

class Response {

	protected $statusCodes = array(
		100 => 'Continue',
		101 => 'Switching Protocols',
		200 => 'OK',
		201 => 'Created',
		202 => 'Accepted',
		203 => 'Non-Authoritative Information',
		204 => 'No Content',
		205 => 'Reset Content',
		206 => 'Partial Content',
		300 => 'Multiple Choices',
		301 => 'Moved Permanently',
		302 => 'Found',
		303 => 'See Other',
		304 => 'Not Modified',
		305 => 'Use Proxy',
		307 => 'Temporary Redirect',
		400 => 'Bad Request',
		401 => 'Unauthorized',
		402 => 'Payment Required',
		403 => 'Forbidden',
		404 => 'Not Found',
		405 => 'Method Not Allowed',
		406 => 'Not Acceptable',
		407 => 'Proxy Authentication Required',
		408 => 'Request Time-out',
		409 => 'Conflict',
		410 => 'Gone',
		411 => 'Length Required',
		412 => 'Precondition Failed',
		413 => 'Request Entity Too Large',
		414 => 'Request-URI Too Large',
		415 => 'Unsupported Media Type',
		416 => 'Requested range not satisfiable',
		417 => 'Expectation Failed',
		429 => 'Too Many Requests',
		500 => 'Internal Server Error',
		501 => 'Not Implemented',
		502 => 'Bad Gateway',
		503 => 'Service Unavailable',
		504 => 'Gateway Time-out',
		505 => 'Unsupported Version'
    );
	
	public $status;
	
	public $headers;
	
	private $content;
	
	// getHeaderLines
	public function __construct($content = '', $status = 200, $headers = array()){
	
		$this->headers = new ParamStore($headers);
		
		$this->setContent($content);
		$this->setStatusCode($status);
	}
	
	public function setStatusCode($code){
		$this->status = $code;
	}
	
	public function getStatusCode(){
		return $this->status;
	}
	
	public function getStatusText(){
		return $this->statusCodes[$this->getStatusCode()];
	}
	
	public function setContent($content){
		$this->content = (string)$content;
	}
	
	public function getContent(){
		return $this->content;
	}
	
	public function sendHeaders(){
	
		if(headers_sent()){
			return;
		}
		
		header(sprintf('HTTP/1.1 %s %s', $this->status, $this->getStatusText()), true, $this->status);
		
		foreach($this->headers->all() as $name => $value){
		
			/*
				Multiple message-header fields with the same field-name MAY be present in a message 
				if and only if the entire field-value for that header field is defined as a comma-separated list
				http://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.2
			*/
			
			$values = is_array($value) ? $value : array($value);
			
			// false = do not replace previous identical header
			foreach($values as $value){
				header("{$name}: {$value}", false);
			}
		}
	}

	public function send(){
		$this->sendHeaders();
		echo $this->content;
	}

}

?>