<?php



/**

 * This file is part of the Nette Framework (http://nette.org)

 *

 * Copyright (c) 2004, 2011 David Grudl (http://davidgrudl.com)

 *

 * For the full copyright and license information, please view

 * the file license.txt that was distributed with this source code.

 * @package Nette\Web
 */







/**

 * HttpRequest provides access scheme for request sent via HTTP.

 *

 * @author     David Grudl

 *

 * @property   NUriScript $uri

 * @property-read array $query

 * @property-read array $post

 * @property-read array $files

 * @property-read array $cookies

 * @property-read string $method

 * @property-read array $headers

 * @property-read NUri $referer

 * @property-read string $remoteAddress

 * @property-read string $remoteHost

 * @property-read bool $secured

 */

class NHttpRequest extends NObject implements IHttpRequest

{

	/** @var string */

	private $method;



	/** @var NUriScript */

	private $uri;



	/** @var array */

	private $query;



	/** @var array */

	private $post;



	/** @var array */

	private $files;



	/** @var array */

	private $cookies;



	/** @var array */

	private $headers;



	/** @var string */

	private $remoteAddress;



	/** @var string */

	private $remoteHost;







	public function __construct(NUriScript $uri, $query = NULL, $post = NULL, $files = NULL, $cookies = NULL,

		$headers = NULL, $method = NULL, $remoteAddress = NULL, $remoteHost = NULL)

	{

		$this->uri = $uri;

		$this->uri->freeze();

		if ($query === NULL) {

			parse_str($uri->query, $this->query);

		} else {

			$this->query = (array) $query;

		}

		$this->post = (array) $post;

		$this->files = (array) $files;

		$this->cookies = (array) $cookies;

		$this->headers = (array) $headers;

		$this->method = $method;

		$this->remoteAddress = $remoteAddress;

		$this->remoteHost = $remoteHost;

	}







	/**

	 * Returns URL object.

	 * @return NUriScript

	 */

	final public function getUri()

	{

		return $this->uri;

	}







	/********************* query, post, files & cookies ****************d*g**/







	/**

	 * Returns variable provided to the script via URL query ($_GET).

	 * If no key is passed, returns the entire array.

	 * @param  string key

	 * @param  mixed  default value

	 * @return mixed

	 */

	final public function getQuery($key = NULL, $default = NULL)

	{

		if (func_num_args() === 0) {

			return $this->query;



		} elseif (isset($this->query[$key])) {

			return $this->query[$key];



		} else {

			return $default;

		}

	}







	/**

	 * Returns variable provided to the script via POST method ($_POST).

	 * If no key is passed, returns the entire array.

	 * @param  string key

	 * @param  mixed  default value

	 * @return mixed

	 */

	final public function getPost($key = NULL, $default = NULL)

	{

		if (func_num_args() === 0) {

			return $this->post;



		} elseif (isset($this->post[$key])) {

			return $this->post[$key];



		} else {

			return $default;

		}

	}







	/**

	 * Returns uploaded file.

	 * @param  string key (or more keys)

	 * @return NHttpUploadedFile

	 */

	final public function getFile($key)

	{

		$args = func_get_args();

		return NArrayTools::get($this->files, $args);

	}







	/**

	 * Returns uploaded files.

	 * @return array

	 */

	final public function getFiles()

	{

		return $this->files;

	}







	/**

	 * Returns variable provided to the script via HTTP cookies.

	 * @param  string key

	 * @param  mixed  default value

	 * @return mixed

	 */

	final public function getCookie($key, $default = NULL)

	{

		if (func_num_args() === 0) {

			return $this->cookies;



		} elseif (isset($this->cookies[$key])) {

			return $this->cookies[$key];



		} else {

			return $default;

		}

	}







	/**

	 * Returns variables provided to the script via HTTP cookies.

	 * @return array

	 */

	final public function getCookies()

	{

		return $this->cookies;

	}







	/********************* method & headers ****************d*g**/







	/**

	 * Returns HTTP request method (GET, POST, HEAD, PUT, ...). The method is case-sensitive.

	 * @return string

	 */

	public function getMethod()

	{

		return $this->method;

	}







	/**

	 * Checks if the request method is the given one.

	 * @param  string

	 * @return bool

	 */

	public function isMethod($method)

	{

		return strcasecmp($this->method, $method) === 0;

	}







	/**

	 * Checks if the request method is POST.

	 * @return bool

	 */

	public function isPost()

	{

		return $this->isMethod('POST');

	}







	/**

	 * Return the value of the HTTP header. Pass the header name as the

	 * plain, HTTP-specified header name (e.g. 'Accept-Encoding').

	 * @param  string

	 * @param  mixed

	 * @return mixed

	 */

	final public function getHeader($header, $default = NULL)

	{

		$header = strtolower($header);

		if (isset($this->headers[$header])) {

			return $this->headers[$header];

		} else {

			return $default;

		}

	}







	/**

	 * Returns all HTTP headers.

	 * @return array

	 */

	public function getHeaders()

	{

		return $this->headers;

	}







	/**

	 * Returns referrer.

	 * @return NUri|NULL

	 */

	final public function getReferer()

	{

		return isset($this->headers['referer']) ? new NUri($this->headers['referer']) : NULL;

	}







	/**

	 * Is the request is sent via secure channel (https).

	 * @return bool

	 */

	public function isSecured()

	{

		return $this->uri->scheme === 'https';

	}







	/**

	 * Is AJAX request?

	 * @return bool

	 */

	public function isAjax()

	{

		return $this->getHeader('X-Requested-With') === 'XMLHttpRequest';

	}







	/**

	 * Returns the IP address of the remote client.

	 * @return string

	 */

	public function getRemoteAddress()

	{

		return $this->remoteAddress;

	}







	/**

	 * Returns the host of the remote client.

	 * @return string

	 */

	public function getRemoteHost()

	{

		if (!$this->remoteHost) {

			$this->remoteHost = $this->remoteAddress ? getHostByAddr($this->remoteAddress) : NULL;

		}

		return $this->remoteHost;

	}







	/**

	 * Parse Accept-Language header and returns prefered language.

	 * @param  array   Supported languages

	 * @return string

	 */

	public function detectLanguage(array $langs)

	{

		$header = $this->getHeader('Accept-Language');

		if (!$header) {

			return NULL;

		}



		$s = strtolower($header);  // case insensitive

		$s = strtr($s, '_', '-');  // cs_CZ means cs-CZ

		rsort($langs);             // first more specific

		preg_match_all('#(' . implode('|', $langs) . ')(?:-[^\s,;=]+)?\s*(?:;\s*q=([0-9.]+))?#', $s, $matches);



		if (!$matches[0]) {

			return NULL;

		}



		$max = 0;

		$lang = NULL;

		foreach ($matches[1] as $key => $value) {

			$q = $matches[2][$key] === '' ? 1.0 : (float) $matches[2][$key];

			if ($q > $max) {

				$max = $q; $lang = $value;

			}

		}



		return $lang;

	}



}