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<?php |
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namespace Routify; |
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class Router { |
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/** |
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* @var array The list of routes that contains the callback function and the request method. |
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*/ |
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private $routes; |
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/** |
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* @var string The path requested for the client(browser, cli, app...). |
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*/ |
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private $path; |
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/** |
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* @var string The requested method(GET, POST, PUT, DELETE) used by the client. |
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*/ |
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private $requestMethod; |
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/** |
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* @var object The instance of the router parser. |
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*/ |
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private $routerParser; |
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/** |
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* @var callable The action to be executed if the any route doesn't match |
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*/ |
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private $notFound; |
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public function __construct() { |
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$this->routes = []; |
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// only path, without ?, #, etc. |
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$this->path = (isset($_SERVER['REQUEST_URI'])) ? |
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rawurldecode(parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH)) : '/'; |
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$this->routerParser = new RouterParser($this->path); |
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$this->requestMethod = $_SERVER['REQUEST_METHOD']; |
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$this->overrideMethod(); |
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$this->notFound = function() {}; |
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} |
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/** |
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* Returns the path. |
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* |
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* @return string |
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*/ |
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public function getPath() { |
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return $this->path; |
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} |
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/** |
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* Returns the array of routes. |
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* |
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* @return array |
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*/ |
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public function getRoutes() { |
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return $this->routes; |
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} |
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/** |
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* Return the request method used by the client. |
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* |
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* @return string |
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*/ |
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public function getRequestMethod() { |
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return $this->requestMethod; |
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} |
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/** |
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* Sets the path. Don't use it in production. Only for tests. |
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* |
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* @param $path |
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*/ |
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public function setPath($path) { |
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$this->path = $path; |
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$this->routerParser->setPath($this->path); |
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} |
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/** |
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* Set the request method. Used in tests or development. |
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* |
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* @param $method |
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*/ |
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public function setRequestMethod($method) { |
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$this->requestMethod = $method; |
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} |
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/** |
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* Dispatch to the route set. |
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* |
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* @param $method string Method to dispatch |
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* @param $path string Path to dispatch |
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*/ |
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public function dispatch($method, $path) { |
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$this->setRequestMethod($method); |
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$this->setPath($path); |
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} |
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/** |
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* Searchs in the array of routes the route that matches(same URI |
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* and request method). |
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* |
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* @param $uri string |
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* @param $method string The request method |
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* @return bool true if exist a result |
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*/ |
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public function find($uri, $method) { |
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$found = false; |
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$counter = 0; |
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if(count($this->routes) === 0) { |
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return $found; |
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} |
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while($found === false && $counter < count($this->routes)) { |
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if($this->routes[$counter]->getUri() === $uri && $this->routes[$counter]->getMethod() === $method) { |
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$found = true; |
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} |
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$counter++; |
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} |
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return $found; |
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} |
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/** |
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* Adds a new route to the routes array. |
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* |
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* @param $uri |
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* @param $method |
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* @param $response |
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* @return bool false if the route has not been added. |
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*/ |
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private function addRoute($uri, $method, $response, array $middleware = []) { |
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if($this->find($uri, $method)) { // search if exists an apparition |
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return false; |
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} |
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$totalRoutes = count($this->routes); |
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$this->routes[$totalRoutes] = new Order($uri, $method, $response, $middleware); |
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return true; |
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} |
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/** |
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* Get all request headers. |
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* |
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* @return array The request headers |
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*/ |
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private function getRequestHeaders() { |
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// If getallheaders() is available, use that |
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if(function_exists('getallheaders')) { |
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return getallheaders(); |
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} |
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// Method getallheaders() not available: manually extract 'm |
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$headers = []; |
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foreach(filter_input_array(INPUT_SERVER) as $key => $value) { |
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if((substr($key, 0, 5) == 'HTTP_') || ($key == 'CONTENT_TYPE') || ($key == 'CONTENT_LENGTH')) { |
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$headers[str_replace([' ', 'Http'], ['-', 'HTTP'], ucwords(strtolower(str_replace('_', ' ', substr($key, 5)))))] = $value; |
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} |
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} |
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return $headers; |
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} |
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/** |
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* Get the request method used, taking overrides into account. |
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* |
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*/ |
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private function overrideMethod() { |
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if($this->requestMethod === 'HEAD') { |
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$this->requestMethod = 'GET'; |
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}elseif($this->requestMethod === 'POST' && filter_input(INPUT_POST, '_method') !== null) { |
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$this->requestMethod = filter_input(INPUT_POST, '_method'); |
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}elseif($this->requestMethod === 'POST') { |
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$headers = $this->getRequestHeaders(); |
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if(isset($headers['X-HTTP-Method-Override']) && in_array($headers['X-HTTP-Method-Override'], ['PUT', 'DELETE', 'PATCH'])) { |
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$this->requestMethod = $headers['X-HTTP-Method-Override']; |
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} |
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} |
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} |
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/** |
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* Clear the array of orders(routes) registered. |
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*/ |
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public function clear() { |
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$this->routes = []; |
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} |
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/** |
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* Register the GET request. |
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* |
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* @param $uri |
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* @param $response |
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*/ |
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public function get($uri, $response, array $middleware = []) { |
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$this->addRoute($uri, Method::GET, $response, $middleware); |
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} |
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/** |
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* Register the POST request. |
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* |
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* @param $uri |
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* @param $response |
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*/ |
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public function post($uri, $response, array $middleware = []) { |
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$this->addRoute($uri, Method::POST, $response, $middleware); |
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} |
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/** |
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* Register the PUT request. |
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* |
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* @param $uri |
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* @param $response |
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*/ |
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public function put($uri, $response, array $middleware = []) { |
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$this->addRoute($uri, Method::PUT, $response, $middleware); |
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} |
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/** |
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* Register the DELETE request. |
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* |
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* @param $uri string The path requested |
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* @param $response callable Action to response |
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*/ |
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public function delete($uri, $response, array $middleware = []) { |
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$this->addRoute($uri, Method::DELETE, $response, $middleware); |
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} |
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/** |
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* Register the PATCH request. |
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* |
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* @param $uri string The path requested |
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* @param $response callable Action to response |
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*/ |
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public function patch($uri, $response, array $middleware = []) { |
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$this->addRoute($uri, Method::PATCH, $response, $middleware); |
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} |
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/** |
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* Register one or more requests for the same uri. |
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* |
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* @param $uri string The path requested |
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* @param $response callable Action to response |
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* @param $methods mixed Methods to bind. Optional. GET by default |
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* @param $middleware array Middlewares before and after. Optional |
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*/ |
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public function both($uri, $response, $methods = Method::GET, array $middleware = []) { |
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if(is_array($methods)) { |
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foreach($methods as $method) { |
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$this->addRoute($uri, $method, $response, $middleware); |
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} |
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} else { |
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$this->addRoute($uri, $methods, $response, $middleware); |
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} |
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} |
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/** |
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* |
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*/ |
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public function any($uri, $response, array $middleware = []) { |
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$this->addRoute($uri, Method::GET, $response, $middleware); |
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$this->addRoute($uri, Method::POST, $response, $middleware); |
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$this->addRoute($uri, Method::PUT, $response, $middleware); |
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$this->addRoute($uri, Method::DELETE, $response, $middleware); |
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$this->addRoute($uri, Method::PATCH, $response, $middleware); |
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} |
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/** |
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* Sets a callback for the notFound event. |
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* |
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* @param $func callable |
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*/ |
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public function notFound($func) { |
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if(is_callable($func)) { |
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$this->notFound = $func; |
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} |
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} |
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/** |
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* Initialize the router app and start to run |
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* over the array of routes for any appearance. |
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* If there is a result then call the callback associate. |
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* If there is not a result it will execute the notFound |
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* action. |
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* |
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* @return mixed The result of execute the callback. |
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*/ |
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public function run() { |
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$found = false; |
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$counter = 0; |
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while($found === false && $counter < count($this->routes)) { |
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if($this->routerParser->match($this->routes[$counter]->getUri()) && $this->routes[$counter]->getMethod() === $this->requestMethod) { |
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$found = true; |
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} else { |
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$counter++; |
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} |
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} |
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if($found) { |
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// run the before middleware if it exists |
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if($this->routes[$counter]->hasBefore()) { |
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call_user_func($this->routes[$counter]->getMiddlewares()['before']); |
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} |
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$params = $this->routerParser->getParams($this->routes[$counter]->getUri()); |
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$response = call_user_func_array($this->routes[$counter]->getResponse(), $params); |
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// run the after middleware if it exists |
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if($this->routes[$counter]->hasAfter()) { |
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call_user_func($this->routes[$counter]->getMiddlewares()['after']); |
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} |
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return $response; |
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} else { |
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return call_user_func($this->notFound); |
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} |
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} |
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} |
Instead of super-globals, we recommend to explicitly inject the dependencies of your class. This makes your code less dependent on global state and it becomes generally more testable: