<?php

/**
 * Freeform for Craft CMS.
 *
 * @author        Solspace, Inc.
 * @copyright     Copyright (c) 2008-2026, Solspace, Inc.
 *
 * @see           https://docs.solspace.com/craft/freeform
 *
 * @license       https://docs.solspace.com/license-agreement
 */

namespace Solspace\Freeform\Library\Mailing;

use Solspace\Freeform\Elements\Submission;
use Solspace\Freeform\Form\Form;
use Solspace\Freeform\Library\DataObjects\NotificationTemplate;
use Solspace\Freeform\Notifications\Components\Recipients\RecipientCollection;

interface MailHandlerInterface
{
    /**
     * Send out an email to recipients using the given mail template.
     *
     * @return int - number of successfully sent emails
     */
    public function sendEmail(
        Form $form,
        RecipientCollection $recipients,
        NotificationTemplate $notificationTemplate,
        ?Submission $submission = null
    ): int;
}
