moodle-local_mycerts/classes/external.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/>.
/**
* This is the external API for this tool.
*
* @package mod_customcert
* @copyright 2016 Mark Nelson <markn@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace mod_customcert;
defined('MOODLE_INTERNAL') || die();
require_once("$CFG->libdir/externallib.php");
/**
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* This is the external API for this tool.
*
* @copyright 2016 Mark Nelson <markn@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class external extends \external_api {
/**
* Returns the save_element() parameters.
*
* @return \external_function_parameters
*/
public static function save_element_parameters() {
return new \external_function_parameters(
array(
'templateid' => new \external_value(PARAM_INT, 'The template id'),
'elementid' => new \external_value(PARAM_INT, 'The element id'),
'values' => new \external_multiple_structure(
new \external_single_structure(
array(
'name' => new \external_value(PARAM_ALPHANUMEXT, 'The field to update'),
'value' => new \external_value(PARAM_RAW, 'The value of the field'),
)
)
)
)
);
}
/**
* Handles saving element data.
*
* @param int $templateid The template id.
* @param int $elementid The element id.
* @param array $values The values to save
* @return array
*/
public static function save_element($templateid, $elementid, $values) {
global $DB;
$params = array(
'templateid' => $templateid,
'elementid' => $elementid,
'values' => $values
);
self::validate_parameters(self::save_element_parameters(), $params);
$template = $DB->get_record('customcert_templates', array('id' => $templateid), '*', MUST_EXIST);
$element = $DB->get_record('customcert_elements', array('id' => $elementid), '*', MUST_EXIST);
// Set the template.
$template = new \mod_customcert\template($template);
// Perform checks.
if ($cm = $template->get_cm()) {
self::validate_context(\context_module::instance($cm->id));
} else {
self::validate_context(\context_system::instance());
}
// Make sure the user has the required capabilities.
$template->require_manage();
// Set the values we are going to save.
$data = new \stdClass();
$data->id = $element->id;
$data->name = $element->name;
foreach ($values as $value) {
$field = $value['name'];
$data->$field = $value['value'];
}
// Get an instance of the element class.
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if ($e = \mod_customcert\element_factory::get_element_instance($element)) {
return $e->save_form_elements($data);
}
return false;
}
/**
* Returns the save_element result value.
*
* @return \external_value
*/
public static function save_element_returns() {
return new \external_value(PARAM_BOOL, 'True if successful, false otherwise');
}
/**
* Returns get_element() parameters.
*
* @return \external_function_parameters
*/
public static function get_element_html_parameters() {
return new \external_function_parameters(
array(
'templateid' => new \external_value(PARAM_INT, 'The template id'),
'elementid' => new \external_value(PARAM_INT, 'The element id'),
)
);
}
/**
* Handles return the element's HTML.
*
* @param int $templateid The template id
* @param int $elementid The element id.
* @return string
*/
public static function get_element_html($templateid, $elementid) {
global $DB;
$params = array(
'templateid' => $templateid,
'elementid' => $elementid
);
self::validate_parameters(self::get_element_html_parameters(), $params);
$template = $DB->get_record('customcert_templates', array('id' => $templateid), '*', MUST_EXIST);
$element = $DB->get_record('customcert_elements', array('id' => $elementid), '*', MUST_EXIST);
// Set the template.
$template = new \mod_customcert\template($template);
// Perform checks.
if ($cm = $template->get_cm()) {
self::validate_context(\context_module::instance($cm->id));
} else {
self::validate_context(\context_system::instance());
}
// Get an instance of the element class.
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if ($e = \mod_customcert\element_factory::get_element_instance($element)) {
return $e->render_html();
}
return '';
}
/**
* Returns the get_element result value.
*
* @return \external_value
*/
public static function get_element_html_returns() {
return new \external_value(PARAM_RAW, 'The HTML');
}
}