ladill-transfer/app/Services/Transfer/TransferRecipientMailService.php

<?php

namespace App\Services\Transfer;

use App\Models\Transfer;
use App\Notifications\TransferRecipientNotification;
use Illuminate\Support\Facades\Notification;

/** Sends the immediate download-link email to transfer recipients. */
class TransferRecipientMailService
{
    public function notifyRecipient(Transfer $transfer, string $milestone = 'created'): bool
    {
        if ($milestone !== 'created') {
            return false;
        }

        $email = trim((string) $transfer->recipient_email);
        if ($email === '') {
            return false;
        }

        if ($transfer->recipientMilestoneSent('created')) {
            return false;
        }

        Notification::route('mail', $email)->notify(
            new TransferRecipientNotification($transfer->loadMissing(['files', 'qrCode', 'user']), 'created'),
        );

        $transfer->markRecipientMilestoneSent('created');

        return true;
    }
}