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/>.

/**
 * @package mod_dataform
 * @copyright 2012 Itamar Tzadok
 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
defined('MOODLE_INTERNAL') or die;

$admincatstr = new lang_string('pluginname', 'mod_dataform');
$ADMIN->add('modsettings', new admin_category('moddataformfolder', $admincatstr, $module->is_enabled() === false));

$settings = new admin_settingpage($section, get_string('settings', 'mod_dataform'), 'moodle/site:config', $module->is_enabled() === false);

if ($ADMIN->fulltree) {
    // Activity administration settings header.
    $name = new lang_string('activityadministration', 'mod_dataform');
    $description = '';
    $settings->add(new admin_setting_heading('activityadminsettings', $name, $description));

    $unlimited = get_string('unlimited');
    $keys = range(0, 500);
    $values = range(1, 500);
    array_unshift($values, $unlimited);

    // Max fields.
    $options = array_combine($keys, $values);
    $settings->add(new admin_setting_configselect('dataform_maxfields', new lang_string('fieldsmax', 'dataform'),
                       new lang_string('configmaxfields', 'dataform'), 0, $options));

    // Max views.
    $options = array_combine($keys, $values);
    $settings->add(new admin_setting_configselect('dataform_maxviews', new lang_string('viewsmax', 'dataform'),
                       new lang_string('configmaxviews', 'dataform'), 0, $options));

    // Max filters.
    $options = array_combine($keys, $values);
    $settings->add(new admin_setting_configselect('dataform_maxfilters', new lang_string('filtersmax', 'dataform'),
                       new lang_string('configmaxfilters', 'dataform'), 0, $options));

    // Entry settings header.
    $name = new lang_string('entries', 'mod_dataform');
    $description = '';
    $settings->add(new admin_setting_heading('entrysettings', $name, $description));

    // Max entries.
    $keys = range(-1, 500);
    $values = range(0, 500);
    array_unshift($values, $unlimited);
    $options = array_combine($keys, $values);
    $settings->add(new admin_setting_configselect('dataform_maxentries', new lang_string('entriesmax', 'dataform'),
                       new lang_string('configmaxentries', 'dataform'), -1, $options));

    // Allow anonymous entries.
    $options = array(0 => get_string('no'), 1 => get_string('yes'));
    $settings->add(new admin_setting_configselect('dataform_anonymous', new lang_string('anonymousentries', 'dataform'),
                       new lang_string('configanonymousentries', 'dataform'), 0, $options));

    // Grade settings header.
    $name = new lang_string('grade', 'grades');
    $description = '';
    $settings->add(new admin_setting_heading('gradesettings', $name, $description));

    // Allow multiple grade items.
    $options = array(0 => get_string('no'), 1 => get_string('yes'));
    $settings->add(new admin_setting_configselect(
        'dataform_multigradeitems',
        new lang_string('multigradeitems', 'dataform'),
        new lang_string('configmultigradeitems', 'dataform'),
        0,
        $options
    ));

    // Other settings header.
    $name = new lang_string('other');
    $description = '';
    $settings->add(new admin_setting_heading('othersettings', $name, $description));

    // Enable rss feeds.
    if (empty($CFG->enablerssfeeds)) {
        $options = array(0 => get_string('rssglobaldisabled', 'admin'));
        $str = new lang_string('configenablerssfeeds', 'dataform').'<br />'.new lang_string('configenablerssfeedsdisabled2', 'admin');

    } else {
        $options = array(0 => get_string('no'), 1 => get_string('yes'));
        $str = new lang_string('configenablerssfeeds', 'dataform');
    }
    $settings->add(new admin_setting_configselect('dataform_enablerssfeeds', new lang_string('enablerssfeeds', 'admin'),
                       $str, 0, $options));

}

$ADMIN->add('moddataformfolder', $settings);
// Tell core we already added the settings structure.
$settings = null;

// Manage dataformfield plugins.
$admincatstr = new lang_string('fieldplugins', 'mod_dataform');
$admincat = new admin_category('dataformfieldplugins', $admincatstr, !$module->is_enabled());
$ADMIN->add('moddataformfolder', $admincat);
$settingpage = new admin_settingpage('managedataformfield', new lang_string('managefields', 'mod_dataform'));
$settingpage->add(new \mod_dataform\setting\managedataformfield());
$ADMIN->add('dataformfieldplugins', $settingpage);

// Manage dataformview plugins.
$admincatstr = new lang_string('viewplugins', 'mod_dataform');
$admincat = new admin_category('dataformviewplugins', $admincatstr, !$module->is_enabled());
$ADMIN->add('moddataformfolder', $admincat);
$settingpage = new admin_settingpage('managedataformview', new lang_string('manageviews', 'mod_dataform'));
$settingpage->add(new \mod_dataform\setting\managedataformview());
$ADMIN->add('dataformviewplugins', $settingpage);

// Site presets manager.
$ADMIN->add('moddataformfolder', new admin_externalpage('moddataform_sitepresets', new lang_string('presetavailableinsite', 'dataform'), '/mod/dataform/admin/sitepresets.php'));

// Add admin tools.
foreach (get_directory_list("$CFG->dirroot/mod/dataform/classes/admin") as $filename) {
    $toolname = basename($filename, '.php');
    $tool = "mod_dataform\admin\\$toolname";
    $ADMIN->add('moddataformfolder', new admin_externalpage("moddataform_$toolname", $tool::get_visible_name(), $tool::get_url()));
}