шаг 4 завершен

app/Core/Router.php

@@ -0,0 +1,69 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Core;
+
+final class Router
+{
+    /**
+     * @var array<int, array{method: string, pattern: string, handler: callable}>
+     */
+    private array $routes = [];
+
+    public function get(string $pattern, callable $handler): void
+    {
+        $this->routes[] = ['method' => 'GET', 'pattern' => $pattern, 'handler' => $handler];
+    }
+
+    public function dispatch(string $method, string $uri): void
+    {
+        $path = parse_url($uri, PHP_URL_PATH) ?: '/';
+        $path = rtrim($path, '/') ?: '/';
+
+        foreach ($this->routes as $route) {
+            if ($route['method'] !== $method) {
+                continue;
+            }
+
+            $params = $this->match($route['pattern'], $path);
+
+            if ($params === null) {
+                continue;
+            }
+
+            ($route['handler'])(...$params);
+            return;
+        }
+
+        http_response_code(404);
+        view('pages/404', [
+            'title' => 'Страница не найдена - Рыбсток',
+            'breadcrumbs' => [
+                ['title' => 'Главная', 'url' => '/'],
+                ['title' => 'Страница не найдена'],
+            ],
+        ]);
+    }
+
+    /**
+     * @return array<int, string>|null
+     */
+    private function match(string $pattern, string $path): ?array
+    {
+        $regex = preg_replace('#\{([a-zA-Z_][a-zA-Z0-9_]*)\}#', '([^/]+)', $pattern);
+        $regex = '#^' . rtrim((string) $regex, '/') . '$#u';
+
+        if ($pattern === '/') {
+            $regex = '#^/$#u';
+        }
+
+        if (!preg_match($regex, $path, $matches)) {
+            return null;
+        }
+
+        array_shift($matches);
+
+        return array_map('urldecode', $matches);
+    }
+}