Create admin only middleware

app/Http/Kernel.php

@@ -53,6 +53,7 @@ class Kernel extends HttpKernel
     protected $routeMiddleware = [
         'auth' => \Illuminate\Auth\Middleware\Authenticate::class,
         'auth.basic' => \Illuminate\Auth\Middleware\AuthenticateWithBasicAuth::class,
+        'admin' => \App\Http\Middleware\AdminOnly::class,
         'bindings' => \Illuminate\Routing\Middleware\SubstituteBindings::class,
         'can' => \Illuminate\Auth\Middleware\Authorize::class,
         'guest' => \App\Http\Middleware\RedirectIfAuthenticated::class,

app/Http/Middleware/AdminOnly.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+
+class AdminOnly
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @param  \Closure  $next
+     * @return mixed
+     */
+    public function handle($request, Closure $next)
+    {
+        if (!is_system_admin($request->user())) {
+            abort(403);
+        }
+
+        return $next($request);
+    }
+}