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|
<?php
namespace Core;
/**
* Router class
*
* @package core
* @author Frederic Guillot
*/
class Router extends Base
{
/**
* Store routes for path lookup
*
* @access private
* @var array
*/
private $paths = array();
/**
* Store routes for url lookup
*
* @access private
* @var array
*/
private $urls = array();
/**
* Get the path to compare patterns
*
* @access public
* @param string $uri
* @param string $query_string
* @return string
*/
public function getPath($uri, $query_string = '')
{
$path = substr($uri, strlen($this->helper->url->dir()));
if (! empty($query_string)) {
$path = substr($path, 0, - strlen($query_string) - 1);
}
if ($path{0} === '/') {
$path = substr($path, 1);
}
return $path;
}
/**
* Add route
*
* @access public
* @param string $path
* @param string $controller
* @param string $action
* @param array $params
*/
public function addRoute($path, $controller, $action, array $params = array())
{
$pattern = explode('/', $path);
$this->paths[] = array(
'pattern' => $pattern,
'count' => count($pattern),
'controller' => $controller,
'action' => $action,
);
$this->urls[$controller][$action][] = array(
'path' => $path,
'params' => array_flip($params),
'count' => count($params),
);
}
/**
* Find a route according to the given path
*
* @access public
* @param string $path
* @return array
*/
public function findRoute($path)
{
$parts = explode('/', $path);
$count = count($parts);
foreach ($this->paths as $route) {
if ($count === $route['count']) {
$params = array();
for ($i = 0; $i < $count; $i++) {
if ($route['pattern'][$i]{0} === ':') {
$params[substr($route['pattern'][$i], 1)] = $parts[$i];
}
else if ($route['pattern'][$i] !== $parts[$i]) {
break;
}
}
if ($i === $count) {
$_GET = array_merge($_GET, $params);
return array($route['controller'], $route['action']);
}
}
}
return array('app', 'index');
}
/**
* Find route url
*
* @access public
* @param string $controller
* @param string $action
* @param array $params
* @return string
*/
public function findUrl($controller, $action, array $params = array())
{
if (! isset($this->urls[$controller][$action])) {
return '';
}
foreach ($this->urls[$controller][$action] as $pattern) {
if (array_diff_key($params, $pattern['params']) === array()) {
$url = $pattern['path'];
$i = 0;
foreach ($params as $variable => $value) {
$url = str_replace(':'.$variable, $value, $url);
$i++;
}
if ($i === $pattern['count']) {
return $url;
}
}
}
return '';
}
/**
* Check controller and action parameter
*
* @access public
* @param string $value Controller or action name
* @param string $default_value Default value if validation fail
* @return string
*/
public function sanitize($value, $default_value)
{
return ! ctype_alpha($value) || empty($value) ? $default_value : strtolower($value);
}
/**
* Find controller/action from the route table or from get arguments
*
* @access public
* @param string $uri
* @param string $query_string
* @return boolean
*/
public function dispatch($uri, $query_string = '')
{
if (! empty($_GET['controller']) && ! empty($_GET['action'])) {
$controller = $this->sanitize($_GET['controller'], 'app');
$action = $this->sanitize($_GET['action'], 'index');
}
else {
list($controller, $action) = $this->findRoute($this->getPath($uri, $query_string));
}
return $this->load(
__DIR__.'/../Controller/'.ucfirst($controller).'.php',
$controller,
'\Controller\\'.ucfirst($controller),
$action
);
}
/**
* Load a controller and execute the action
*
* @access private
* @param string $filename
* @param string $controller
* @param string $class
* @param string $method
* @return bool
*/
private function load($filename, $controller, $class, $method)
{
if (file_exists($filename)) {
require $filename;
if (! method_exists($class, $method)) {
return false;
}
$instance = new $class($this->container);
$instance->beforeAction($controller, $method);
$instance->$method();
return true;
}
return false;
}
}
|
