app/bundles/LeadBundle/Field/Notification/CustomFieldNotification.php

<?php

declare(strict_types=1);

namespace Mautic\LeadBundle\Field\Notification;

use Mautic\CoreBundle\Model\NotificationModel;
use Mautic\LeadBundle\Entity\LeadField;
use Mautic\LeadBundle\Field\Exception\NoUserException;
use Mautic\UserBundle\Entity\User;
use Mautic\UserBundle\Model\UserModel;
use Symfony\Contracts\Translation\TranslatorInterface;

class CustomFieldNotification
{
    public function __construct(
        private NotificationModel $notificationModel,
        private UserModel $userModel,
        private TranslatorInterface $translator
    ) {
    }

    public function customFieldWasCreated(LeadField $leadField, ?int $userId): void
    {
        try {
            $user = $this->getUser($userId);
        } catch (NoUserException) {
            return;
        }

        $message = $this->translator->trans(
            'mautic.lead.field.notification.created_message',
            ['%label%' => $leadField->getLabel()]
        );
        $header  = $this->translator->trans('mautic.lead.field.notification.created_header');

        $this->addToNotificationCenter($user, $message, $header);
    }

    public function customFieldWasUpdated(LeadField $leadField, ?int $userId): void
    {
        try {
            $user = $this->getUser($userId);
        } catch (NoUserException) {
            return;
        }

        $message = $this->translator->trans(
            'mautic.lead.field.notification.updated_message',
            ['%label%' => $leadField->getLabel()]
        );
        $header  = $this->translator->trans('mautic.lead.field.notification.updated_header');

        $this->addToNotificationCenter($user, $message, $header);
    }

    public function customFieldLimitWasHit(LeadField $leadField, ?int $userId): void
    {
        try {
            $user = $this->getUser($userId);
        } catch (NoUserException) {
            return;
        }

        $message = $this->translator->trans(
            'mautic.lead.field.notification.custom_field_limit_hit_message',
            ['%label%' => $leadField->getLabel()]
        );
        $header  = $this->translator->trans('mautic.lead.field.notification.custom_field_limit_hit_header');

        $this->addToNotificationCenter($user, $message, $header);
    }

    public function customFieldCannotBeCreated(LeadField $leadField, ?int $userId): void
    {
        try {
            $user = $this->getUser($userId);
        } catch (NoUserException) {
            return;
        }

        $message = $this->translator->trans(
            'mautic.lead.field.notification.cannot_be_created_message',
            ['%label%' => $leadField->getLabel()]
        );
        $header  = $this->translator->trans('mautic.lead.field.notification.cannot_be_created_header');

        $this->addToNotificationCenter($user, $message, $header);
    }

    private function addToNotificationCenter(User $user, string $message, string $header): void
    {
        $this->notificationModel->addNotification(
            $message,
            'info',
            false,
            $header,
            'ri-layout-column-line',
            null,
            $user
        );
    }

    /**
     * @throws NoUserException
     */
    private function getUser(?int $userId): User
    {
        if (!$userId || !$user = $this->userModel->getEntity($userId)) {
            throw new NoUserException();
        }

        return $user;
    }
}