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moodle/public/lib/classes/output/externable.php
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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/>.
namespace core\output;
use core\context;
use core\external\exporter;
use core_external\external_single_structure;
/**
* Interface marking other classes exportable for external services.
*
* Implementing this interface signifies that a class can be exported for use in external web services.
* The class must provide a valid exporter instance for data export, along with methods to retrieve
* the appropriate read structure and property definitions required for external service integration.
*
* @copyright 2025 Ferran Recio <ferran@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @package core
* @category output
* @since 5.1
*/
interface externable {
/**
* Returns the exporter instance that will be used to export this data.
*
* Context is optional but necessary to parse texts. Some implementations may not need it
* as they are aware of the context they are in. In any case, if the context is not provided,
* the implementation can supose the system context when the context is unknown.
*
* @param \core\context|null $context An optional context for parsing texts.
* @return \core\external\exporter The exporter class for this output.
*/
public function get_exporter(?context $context = null): exporter;
/**
* Returns the read structure.
*
* This method is used to get the webservice return structure
* and it is just a wrapper to the exporter::get_read_structure() method
* on the output exporter.
*
* @param int $required Whether is required.
* @param mixed $default The default value.
*
* @return external_single_structure
*/
public static function get_read_structure(int $required = VALUE_REQUIRED, mixed $default = null): external_single_structure;
/**
* Get the read properties definition of this exporter.
*
* This method is used to combine properties from several exporters
* and it is just wrapper to the exporter::read_properties_definition() method
* on the output exporter.
*
* @return array Keys are the property names, and value their definition.
*/
public static function read_properties_definition(): array;
}