Laravel Notifications - delay email sending and cancel if condition met

Question

I have an app where I am sending a push notification which is fine if the user is logged into the application - however, if they're not / if they have not read the notification within X minutes I'd like to send them an email.

The way I am going about this is to use Laravel Notifications to create a mail, broadcast & database notification. On the toMail() method I'm returning a mailable with a delay -

public function toMail($notifiable)
{
    return (new \App\Mail\Order\NewOrder($this->order))
        ->delay(now()->addMinutes(10));
}

After the minutes are up, the email will send but, before the send goes ahead I'd like to perform a check to see if the push/database notification has already been marked as read and if it has cancel the email send. The only way I can think to do this is to bind to the MessageSending event that is baked into Laravel -

// listen for emails being sent
'Illuminate\Mail\Events\MessageSending' => [
    'App\Listeners\Notification\SendingEmail'
],

The only problem is this listener receives a Swift mail event and not the original mailable I was dispatching so I don't know how to cancel it. Any ideas and thanks in advance?

Answer 1

Class extends Notification

public function via($notifiable)
{
    if($this->dontSend($notifiable)) {
        return [];
    }
    return ['mail'];
}

public function dontSend($notifiable)
{
    return $this->appointment->status === 'cancelled';
}

Class EventServiceProvider

protected $listen = [
    NotificationSending::class => [
        NotificationSendingListener::class,
    ],
];

Class NotificationSendingListener

public function handle(NotificationSending $event)
{
    if (method_exists($event->notification, 'dontSend')) {
        return !$event->notification->dontSend($event->notifiable);
    }
    return true;
}

For more details look article Handling delayed notifications in Laravel