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<?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/>.
/**
* Statement actor (user or group) object for xAPI structure checking and usage.
*
* @package core_xapi
* @copyright 2020 Ferran Recio
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace core_xapi\local\statement;
use core_xapi\xapi_exception;
use stdClass;
defined('MOODLE_INTERNAL') || die();
/**
* Abstract xAPI actor class.
*
* This class extends from item_object instead of basic item
* because both actors (agent and group) could be used as
* statement actor or object.
*
* @copyright 2020 Ferran Recio
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
abstract class item_actor extends item_object {
/**
* Function to create an actor from part of the xAPI statement.
*
* @param stdClass $data the original xAPI element
* @return item item_agent|item_grou|item_activity xAPI generated
*/
public static function create_from_data(stdClass $data): item {
if (!isset($data->objectType)) {
$data->objectType = 'Agent';
}
switch ($data->objectType) {
case 'Agent':
return item_agent::create_from_data($data);
break;
case 'Group':
return item_group::create_from_data($data);
break;
default:
throw new xapi_exception("Unknown Actor type '{$data->objectType}'");
}
}
/**
* Returns the moodle user represented by this item.
*
* @return stdClass user record
*/
abstract public function get_user(): stdClass;
/**
* Return all moodle users represented by this item.
*
* @return array user records
*/
abstract public function get_all_users(): array;
}