<?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/>.

/**
 * Defines classes used for plugin info.
 *
 * @package    core
 * @copyright  2013 Petr Skoda {@link http://skodak.org}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
namespace core\plugininfo;

use moodle_url, part_of_admin_tree, admin_settingpage;

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


/**
 * Class for HTML editors
 */
class editor extends base {
    /**
     * Finds all enabled plugins, the result may include missing plugins.
     * @return array|null of enabled plugins $pluginname=>$pluginname, null means unknown
     */
    public static function get_enabled_plugins() {
        global $CFG;

        if (empty($CFG->texteditors)) {
            return array('atto'=>'atto', 'tinymce'=>'tinymce', 'textarea'=>'textarea');
        }

        $enabled = array();
        foreach (explode(',', $CFG->texteditors) as $editor) {
            $enabled[$editor] = $editor;
        }

        return $enabled;
    }


>     public static function enable_plugin(string $pluginname, int $enabled): bool {
    public function get_settings_section_name() {
>         global $CFG;
        return 'editorsettings' . $this->name;
> 
    }
>         $haschanged = false;

>         if (!empty($CFG->texteditors)) {
    public function load_settings(part_of_admin_tree $adminroot, $parentnodename, $hassiteconfig) {
>             $plugins = array_flip(explode(',', $CFG->texteditors));
        global $CFG, $USER, $DB, $OUTPUT, $PAGE; // In case settings.php wants to refer to them.
>         } else {
        $ADMIN = $adminroot; // May be used in settings.php.
>             $plugins = [];
        $plugininfo = $this; // Also can be used inside settings.php.
>         }
        $editor = $this;     // Also can be used inside settings.php.
> 

>         // Only set visibility if it's different from the current value.
        if (!$this->is_installed_and_upgraded()) {
>         if ($enabled && !array_key_exists($pluginname, $plugins)) {
            return;
>             $plugins[$pluginname] = $pluginname;
        }
>             $haschanged = true;

>         } else if (!$enabled && array_key_exists($pluginname, $plugins)) {
        if (!$hassiteconfig or !file_exists($this->full_path('settings.php'))) {
>             unset($plugins[$pluginname]);
            return;
>             $haschanged = true;
        }
>         }

> 
        $section = $this->get_settings_section_name();
>         // At least one editor must be active.

>         if (empty($plugins)) {
        $settings = new admin_settingpage($section, $this->displayname, 'moodle/site:config', $this->is_enabled() === false);
>             $plugins['textarea'] = 'textarea';
        include($this->full_path('settings.php')); // This may also set $settings to null.
>             $haschanged = true;

>         }
        if ($settings) {
> 
            $ADMIN->add($parentnodename, $settings);
>         if ($haschanged) {
        }
>             $new = implode(',', array_flip($plugins));
    }
>             add_to_config_log('editor_visibility', !$enabled, $enabled, $pluginname);

>             set_config('texteditors', $new);
    /**
>             // Reset caches.
     * Basic textarea editor can not be uninstalled.
>             \core_plugin_manager::reset_caches();
     */
>         }
    public function is_uninstall_allowed() {
> 
        if ($this->name === 'textarea') {
>         return $haschanged;
            return false;
>     }
        } else {
> 


            return true;
        }
    }

    /**
     * Return URL used for management of plugins of this type.
     * @return moodle_url
     */
    public static function get_manage_url() {
        return new moodle_url('/admin/settings.php', array('section'=>'manageeditors'));
    }
}