404 middleware version of spatie/laravel-permission.

Permission404Middleware.php

<?php

namespace App\Http\Middleware;

use Closure;
use Spatie\Permission\Middlewares\PermissionMiddleware as Middleware;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

class Permission404Middleware extends Middleware
{
    /**
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @param  mixed $permission
     * @return mixed
     * @throws \Symfony\Component\HttpKernel\Exception\NotFoundHttpException
     */
    public function handle($request, Closure $next, $permission)
    {
        try {
            return parent::handle($request, $next, $permission);
        } catch (\Spatie\Permission\Exceptions\UnauthorizedException $exception) {
            throw new NotFoundHttpException();
        }
    }
}

Example

in app/Http/Kernel.php

<?php

namespace App\Http;

use Illuminate\Foundation\Http\Kernel as HttpKernel;

class Kernel extends HttpKernel
{
    // ...

    protected $routeMiddleware = [
        // ...
        'permission' => \Spatie\Permission\Middlewares\PermissionMiddleware::class,
        'permission.404' => \App\Http\Middleware\Permission404Middleware::class,
    ];

    // ...
}

in routes/web.php

Route::prefix('/admin')->middleware('permission.404:show admin page')->group(function () {
    Route::get('/', function () {
        return view('admin.dashboard');
    });

    // ...
});