User management (#185)

app/Http/Middleware/IsAdmin.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use App\Enums\UserRole;
+use Closure;
+use Illuminate\Http\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+class IsAdmin
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param  \Closure(\Illuminate\Http\Request): (\Symfony\Component\HttpFoundation\Response)  $next
+     */
+    public function handle(Request $request, Closure $next): Response
+    {
+        if (auth()->user()->role !== UserRole::ADMIN) {
+            abort(403, 'You are not authorized to access this page.');
+        }
+
+        return $next($request);
+    }
+}