first commit

src/core/Router.php

@@ -0,0 +1,103 @@
+<?php
+
+namespace MyApp\Core;
+
+use ReflectionMethod;
+
+/**
+ * Class Router.
+ */
+class Router
+{
+    /**
+     * @var array
+     */
+    private $routes = [];
+
+    public function __construct()
+    {
+        $this->getRoutesFromControllers();
+        $this->addRoute('/^.*$/', 'MyApp\\Controller\\ErrorsController', 'get404', ['GET']);
+        $this->addRoute('/^.*$/', 'MyApp\\Controller\\ErrorsController', 'post404', ['POST', 'PUT', 'DELETE']);
+
+        $this->run();
+    }
+
+    /**
+     * Get Routes from a comment on method in Controllers.
+     */
+    private function getRoutesFromControllers()
+    {
+        /* @var \App $app */
+        global $app;
+
+        /* @var Config $config */
+        $config = $app->config;
+
+        $controllersDir = $config->getControllersDir();
+        $controllersNamespace = $config->getControllersNamespace();
+
+        $files = scandir($controllersDir);
+        foreach ($files as $file) {
+            $className = strstr($file, '.php', true);
+            $fileName = $controllersDir.$file;
+            if (is_file($fileName) && false !== $className) {
+                try {
+                    $refClass = new \ReflectionClass($controllersNamespace.$className);
+                    $methods = $refClass->getMethods(ReflectionMethod::IS_PUBLIC);
+                    foreach ($methods as $method) {
+                        $tags = $app->parseTagsFromComment($method->getDocComment());
+                        if (is_array($tags)) {
+                            if (array_key_exists('RouteRegExp', $tags)) {
+                                if (!array_key_exists('HttpMethod', $tags)) {
+                                    $tags['HttpMethod'] = ['GET'];
+                                }
+
+                                $this->addRoute($tags['RouteRegExp'], $method->class, $method->name, $tags['HttpMethod']);
+                            }
+                        }
+                    }
+                } catch (\ReflectionException $e) {
+                    var_dump($e);
+                }
+            }
+        }
+    }
+
+    /**
+     * Add route to array.
+     *
+     * @param string $regExp
+     * @param string $className
+     * @param string $classMethod
+     * @param array  $httpMethods
+     */
+    private function addRoute(string $regExp, string $className, string $classMethod, array $httpMethods)
+    {
+        foreach ($httpMethods as $httpMethod) {
+            $this->routes[strtoupper($httpMethod)][] = [$regExp, $className, $classMethod];
+        }
+    }
+
+    /**
+     * Run parse request.
+     */
+    private function run()
+    {
+        if (array_key_exists($_SERVER['REQUEST_METHOD'], $this->routes)) {
+            foreach ($this->routes[$_SERVER['REQUEST_METHOD']] as $route_array) {
+                if (preg_match($route_array[0], $_SERVER['REQUEST_URI'], $matches)) {
+                    $obj = new $route_array[1]();
+                    $param_arr = [];
+                    foreach ($matches as $key => $value) {
+                        if (!is_int($key)) {
+                            $param_arr[] = $value;
+                        }
+                    }
+                    call_user_func_array([$obj, $route_array[2]], $param_arr);
+                    break;
+                }
+            }
+        }
+    }
+}