<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

namespace core_courseformat;

/**
 * Contains the interface that any course format plugin should implement
 * when it wants to only display a single activity in the course page.
 *
 * @package    core_courseformat
 * @copyright  2025 Sara Arjona <sara@moodle.com>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
interface main_activity_interface {

    /**
     * Get the main activity of the course.
     *
     * @return \cm_info|null The main activity object or null if main activity is not set.
     */
    public function get_main_activity(): ?\cm_info;
}