laravelio/laravel.io

// All this event class does is accepting the article as a parameter, to pass it to the Listener

final class ArticleWasApproved
{
    use SerializesModels;

    public $article;

    public function __construct(Article $article)
    {
        $this->article = $article;
    }
}

// In the EventServiceProvider, you register events and their listeners

use App\Events\ArticleWasApproved;
use App\Listeners\SendArticleApprovedNotification;

class EventServiceProvider extends ServiceProvider
{
    protected $listen = [
        ArticleWasApproved::class => [
            SendArticleApprovedNotification::class,
        ],

        // ... other events and listeners
    ];
}

// Listener gets $event->article from the Event parameter, and sends the notification

use App\Events\ArticleWasApproved;
use App\Notifications\ArticleApprovedNotification;

final class SendArticleApprovedNotification
{
    public function handle(ArticleWasApproved $event): void
    {
        $event->article->author()->notify(new ArticleApprovedNotification($event->article));
    }
}