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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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namespace mod_quiz\external;
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use core_external\external_api;
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use core_external\external_description;
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use core_external\external_function_parameters;
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use core_external\external_multiple_structure;
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use core_external\external_single_structure;
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use core_external\external_value;
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use mod_quiz\quiz_attempt;
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use mod_quiz\quiz_settings;
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use moodle_exception;
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/**
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* Web service method to delete quiz grade items.
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*
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* The user must have the 'mod/quiz:manage' capability for the quiz.
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*
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* The grade items to be deleted must all belong to the same quiz,
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* and must not be referred to by any slot.
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*
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* @package mod_quiz
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* @copyright 2023 The Open University
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class delete_grade_items extends external_api {
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/**
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* Declare the method parameters.
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*
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* @return external_function_parameters
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*/
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public static function execute_parameters(): external_function_parameters {
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return new external_function_parameters([
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'quizid' => new external_value(PARAM_INT, 'The quiz to update slots for.'),
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'quizgradeitems' => new external_multiple_structure(
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new external_single_structure([
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'id' => new external_value(PARAM_INT, 'id of the quiz grade item'),
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])
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),
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]);
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}
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/**
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* Delete quiz grade items, if they are unused.
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*
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* @param int $quizid the id of the quiz from which to dlete grade items.
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* @param array $gradeitems list of grade items to delete. (They must belong to this quiz.)
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*/
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public static function execute(int $quizid, array $gradeitems): void {
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global $DB;
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[
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'quizid' => $quizid,
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'quizgradeitems' => $gradeitems,
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] = self::validate_parameters(self::execute_parameters(), [
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'quizid' => $quizid,
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'quizgradeitems' => $gradeitems,
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]);
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// Check the request is valid.
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$quizobj = quiz_settings::create($quizid);
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require_capability('mod/quiz:manage', $quizobj->get_context());
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self::validate_context($quizobj->get_context());
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$transaction = $DB->start_delegated_transaction();
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$structure = $quizobj->get_structure();
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foreach ($gradeitems as $gradeitemdata) {
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$structure->delete_grade_item($gradeitemdata['id']);
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}
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$transaction->allow_commit();
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}
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/**
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* Define the webservice response.
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*
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* @return external_description|null always null.
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*/
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public static function execute_returns(): ?external_description {
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return null;
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}
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}
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