<?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/>.

/**
 * Library code used by the service control interfaces.
 *
 * @package   local_webhooks
 * @copyright 2017 "Valentin Popov" <info@valentineus.link>
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

/**
 * Returns available event classes grouped by component.
 *
 * @return array
 */
function local_webhooks_get_event_choices() {
    global $CFG;

    $choices = [];
    $debug = $CFG->debug;

    // Deprecated core events emit debugging while loading; mirror the core tool_monitor workaround.
    try {
        $CFG->debug = DEBUG_NONE;
        $classes = core_component::get_component_classes_in_namespace(null, 'event');
    } finally {
        $CFG->debug = $debug;
    }

    ksort($classes);
    foreach (array_keys($classes) as $classname) {
        if (
            $classname === \core\event\unknown_logged::class
                || !is_subclass_of($classname, \core\event\base::class)
                || $classname::is_deprecated()
        ) {
            continue;
        }

        $reflection = new ReflectionClass($classname);
        if ($reflection->isAbstract()) {
            continue;
        }

        $eventname = '\\' . ltrim($classname, '\\');
        $component = core_component::get_component_from_classname($classname);
        $choices[$component][base64_encode($eventname)] = $eventname;
    }

    return $choices;
}