Maybe parseUriparseUri should be in another class... Maybe and maybe there is too much responsibility for this class ...
I know that it can be improved. The execute method could be better because there are some repeated code ...
<?php
class Request
{
private static $_instance;
private $_host;
private $_request_uri;
private $_script_name;
private $_controller;
private $_method;
private $_parameters;
private $_headers;
private function __construct()
{
$this->_host = $_SERVER['HTTP_HOST'];
$this->_request_uri = $_SERVER['REQUEST_URI'];
$this->_script_name = $_SERVER['SCRIPT_NAME'];
$this->_headers = array();
$this->_parseUri();
}
private function _parseUri()
{
/* In 'http://www.siteexample.com/foo/bar/' get the '/foo/bar/' part */
$part = str_replace(
dirname($this->_script_name),
'',
$this->_request_uri
);
/* break it into chunks and clean up empty positions */
$chunks = explode('/', $part);
$chunks = array_filter($chunks);
if (count($chunks))
{
if ($this->_controller = array_shift($chunks))
{
$this->_controller = ucfirst($this->_controller) . '_Controller';
}
if ($this->_method = array_shift($chunks))
{
$this->_method = ucfirst($this->_method) . 'Action';
}
$this->_parameters = $chunks ? $chunks : null;
}
}
private function _send_headers()
{
foreach($this->_headers as $header)
{
header($header);
}
}
public static function instance()
{
if (!self::$_instance)
{
self::$_instance = new Request();
}
return self::$_instance;
}
public function execute()
{
/* There is a controller ... */
if (!empty($this->_controller))
{
if (!class_exists($this->_controller, true))
{
array_push($this->_headers, 'HTTP/1.1 404 Not Found');
$this->_send_headers();
return;
}
$controller = new $this->_controller();
/* ... and a method */
if ($this->_method)
{
if (!method_exists($controller, $this->_method))
{
array_push($this->_headers, 'HTTP/1.1 404 Not Found');
$this->_send_headers();
return;
}
$method = new ReflectionMethod(
$controller, $this->_method
);
/* Do we have parameters? Let's call the right method */
$this->_parameters
? $method->invokeArgs($controller, $this->_parameters)
: $method->invoke($controller);
array_push($this->_headers, 'HTTP/1.1 200 OK');
$this->_send_headers();
}
/* we don't have a method here, let's call the 'index_action' method */
else
{
$method = new ReflectionMethod($controller, 'indexAction');
$method->invoke($controller);
array_push($this->_headers, 'HTTP/1.1 200 OK');
$this->_send_headers();
}
}
/* We don't have a Controller, let's call the default one. */
else
{
if (!class_exists('Default_Controller', true))
{
throw new RequestException("'Default_Controller' class not found.");
}
$controller = new Default_Controller();
if (!method_exists($controller, 'indexAction'))
{
throw new RequestException(
"'indexAction' method not found in 'Default_Controller' class."
);
}
$method = new ReflectionMethod($controller, 'indexAction');
$method->invoke($controller);
}
}
}
?>
