settings.php

<?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/>.

/**
 * List all parents for a given course
 *
 * @package    local_parents
 * @copyright  Maxime Pelletier <maxime.pelletier@educsa.org>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die();

if ($hassiteconfig) {
    $settings = new admin_settingpage('local_parents', get_string('pluginname', 'local_parents'));
    $settings->add(new admin_setting_heading('local_parents_settings', '', get_string('pluginname_desc', 'local_parents')));

    // Link name.
    $settings->add(new admin_setting_configtext('local_parents/link_name', get_string('link_name', 'local_parents'),
            get_string('link_name_desc', 'local_parents'), 'Parents'));

    // Role to display.
    // @TODO Find a way to retrieves only user context roles.
    $options = array();
    $roles = get_all_roles();
    $parent = 0;
    foreach ($roles as $role) {
        // Looking for a parent role.
        if (stripos( $role->name, 'parent') !== false) {
            $options[$role->id] = $role->name;
            $parent = $role->id;
        }
    }

    $settings->add(new admin_setting_configselect('local_parents/parent_role', get_string('parent_role', 'local_parents'),
            get_string('parent_role_desc', 'local_parents'), $parent, $options));

    $ADMIN->add('localplugins', $settings);

}