在 Laravel 中使用中间件获取权限

Question

这段代码在 Laravel 中用作中间件，只允许具有特定权限的用户做某事，并且它正在工作，但我真的不明白它是如何工作的？ 谁能逐行解释一下这段代码吗？

此中间件代码称为（AuthGates）

public function handle($request, Closure $next)
        {
            $user = Auth::user();
            //add all permission 
            if ($user) {
                $roles            = Role::with('permissions')->get();
                $permissionsArray = [];
    
            foreach ($roles as $role) {
                foreach ($role->permissions as $permissions) {
                    $permissionsArray[$permissions->title][] = $role->id;
                }
            }

            foreach ($permissionsArray as $title => $roles) {
                Gate::define($title, function ($user) use ($roles) {
                    return count(array_intersect($user->roles->pluck('id')->toArray(), $roles)) > 0;
                });
            }
        }

        return $next($request);
    }

然后在Kernal中调用这个类：

protected $middlewareGroups = [
 

   'web' => [
        \App\Http\Middleware\EncryptCookies::class,
        \Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
        \Illuminate\Session\Middleware\StartSession::class,
        \Laravel\Jetstream\Http\Middleware\AuthenticateSession::class,
        \Illuminate\View\Middleware\ShareErrorsFromSession::class,
        \App\Http\Middleware\VerifyCsrfToken::class,
        \Illuminate\Routing\Middleware\SubstituteBindings::class,
        AuthGates::class
    ],

之后，在blade.php文件中使用它来显示一个链接，例如仅针对拥有此权限（例如（work_access）权限）的人：

@can('work_access')
link here or any html parts we want to protect.....
@endcan

Answer 1

试试这个：

\App\Http\Middleware\AuthGates::class,