alkrauss48/simple-slides

use App\Models\Presentation;
use App\Models\User;

class PresentationPolicy
{
    // ...

    public function view(User $user, Presentation $presentation): bool
    {
        return $presentation->user_id === $user->id;
    }

    // ...
}

use App\Models\User;
use Inertia\Inertia;
use Inertia\Response;

class PresentationController extends Controller
{
    public function show(User $user, string $slug): Response
    {
        $presentation = $user
            ->presentations()
            ->where('slug', $slug)
            ->firstOrFail();

        if (! $presentation->canBeViewed) {
            abort(403);
        }

        // ...
    }
}

use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Casts\Attribute;
use Illuminate\Database\Eloquent\Model;

class Presentation extends Model implements HasMedia
{
    // ...

    protected function canBeViewed(): Attribute
    {
        return Attribute::make(
            get: function (mixed $value, array $attributes): bool {
                if ($this->is_published) {
                    return true;
                }

                if (! auth()->check()) {
                    return false;
                }

                return auth()->user()->can('view', $this);
            },
        );
    }

    // ...
}