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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 core_courseformat\local;
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use section_info;
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use stdClass;
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use core\event\course_module_updated;
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use core\event\course_section_deleted;
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/**
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* Section course format actions.
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*
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* @package core_courseformat
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* @copyright 2023 Ferran Recio <ferran@moodle.com>
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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 sectionactions extends baseactions {
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/**
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* Create a course section using a record object.
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*
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* If $fields->section is not set, the section is added to the end of the course.
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*
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* @param stdClass $fields the fields to set on the section
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* @param bool $skipcheck the position check has already been made and we know it can be used
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* @return stdClass the created section record
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*/
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protected function create_from_object(stdClass $fields, bool $skipcheck = false): stdClass {
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global $DB;
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[
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'position' => $position,
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'lastsection' => $lastsection,
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] = $this->calculate_positions($fields, $skipcheck);
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// First add section to the end.
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$sectionrecord = (object) [
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'course' => $this->course->id,
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'section' => $lastsection + 1,
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'summary' => $fields->summary ?? '',
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'summaryformat' => $fields->summaryformat ?? FORMAT_HTML,
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'sequence' => '',
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'name' => $fields->name ?? null,
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'visible' => $fields->visible ?? 1,
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'availability' => null,
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'component' => $fields->component ?? null,
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'itemid' => $fields->itemid ?? null,
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'timemodified' => time(),
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];
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$sectionrecord->id = $DB->insert_record("course_sections", $sectionrecord);
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// Now move it to the specified position.
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if ($position > 0 && $position <= $lastsection) {
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move_section_to($this->course, $sectionrecord->section, $position, true);
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$sectionrecord->section = $position;
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}
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\core\event\course_section_created::create_from_section($sectionrecord)->trigger();
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rebuild_course_cache($this->course->id, true);
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return $sectionrecord;
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}
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/**
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* Calculate the position and lastsection values.
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*
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* Each section number must be unique inside a course. However, the section creation is not always
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* explicit about the final position. By default, regular sections are created at the last position.
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* However, delegated section can alter that order, because all delegated sections should have higher
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* numbers. Apart, restore operations can also create sections with a forced specific number.
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*
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* This method returns what is the best position for a new section data and, also, what is the current
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* last section number. The last section is needed to decide if the new section must be moved or not after
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* insertion.
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*
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* @param stdClass $fields the fields to set on the section
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* @param bool $skipcheck the position check has already been made and we know it can be used
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* @return array with the new section position (position key) and the course last section value (lastsection key)
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*/
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private function calculate_positions($fields, $skipcheck): array {
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if (!isset($fields->section)) {
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$skipcheck = false;
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}
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if ($skipcheck) {
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return [
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'position' => $fields->section,
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'lastsection' => $fields->section - 1,
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];
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}
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$lastsection = $this->get_last_section_number();
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if (!empty($fields->component)) {
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return [
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'position' => $fields->section ?? $lastsection + 1,
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'lastsection' => $lastsection,
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];
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}
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return [
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'position' => $fields->section ?? $this->get_last_section_number(false) + 1,
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'lastsection' => $lastsection,
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];
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}
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/**
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* Get the last section number in the course.
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* @param bool $includedelegated whether to include delegated sections
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* @return int
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*/
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protected function get_last_section_number(bool $includedelegated = true): int {
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global $DB;
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$delegtadefilter = $includedelegated ? '' : ' AND component IS NULL';
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return (int) $DB->get_field_sql(
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'SELECT max(section) from {course_sections} WHERE course = ?' . $delegtadefilter,
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[$this->course->id]
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);
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}
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/**
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* Create a delegated section.
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*
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* @param string $component the name of the plugin
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* @param int|null $itemid the id of the delegated section
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* @param stdClass|null $fields the fields to set on the section
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* @return section_info the created section
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*/
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public function create_delegated(
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string $component,
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?int $itemid = null,
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?stdClass $fields = null
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): section_info {
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$record = ($fields) ? clone $fields : new stdClass();
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$record->component = $component;
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$record->itemid = $itemid;
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$record = $this->create_from_object($record);
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return $this->get_section_info($record->id);
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}
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/**
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* Creates a course section and adds it to the specified position
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*
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* This method returns a section record, not a section_info object. This prevents the regeneration
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* of the modinfo object each time we create a section.
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*
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* If position is greater than number of existing sections, the section is added to the end.
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* This will become sectionnum of the new section. All existing sections at this or bigger
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* position will be shifted down.
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*
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* @param int $position The position to add to, 0 means to the end.
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* @param bool $skipcheck the check has already been made and we know that the section with this position does not exist
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* @return stdClass created section object)
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*/
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public function create(int $position = 0, bool $skipcheck = false): stdClass {
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$record = (object) [
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'section' => $position,
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];
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return $this->create_from_object($record, $skipcheck);
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}
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/**
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* Create course sections if they are not created yet.
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*
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* The calculations will ignore sections delegated to components.
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* If the section is created, all delegated sections will be pushed down.
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*
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* @param int[] $sectionnums the section numbers to create
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* @return bool whether any section was created
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*/
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public function create_if_missing(array $sectionnums): bool {
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$result = false;
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$modinfo = get_fast_modinfo($this->course);
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// Ensure we add the sections in order.
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sort($sectionnums);
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// Delegated sections must be displaced when creating a regular section.
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$skipcheck = !$modinfo->has_delegated_sections();
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$sections = $modinfo->get_section_info_all();
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foreach ($sectionnums as $sectionnum) {
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if (isset($sections[$sectionnum]) && empty($sections[$sectionnum]->component)) {
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continue;
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}
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$this->create($sectionnum, $skipcheck);
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$result = true;
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}
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return $result;
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}
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/**
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* Delete a course section.
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* @param section_info $sectioninfo the section to delete.
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* @param bool $forcedeleteifnotempty whether to force section deletion if it contains modules.
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* @param bool $async whether or not to try to delete the section using an adhoc task. Async also depends on a plugin hook.
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* @return bool whether section was deleted
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*/
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public function delete(section_info $sectioninfo, bool $forcedeleteifnotempty = true, bool $async = false): bool {
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// Check the 'course_module_background_deletion_recommended' hook first.
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// Only use asynchronous deletion if at least one plugin returns true and if async deletion has been requested.
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// Both are checked because plugins should not be allowed to dictate the deletion behaviour, only support/decline it.
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// It's up to plugins to handle things like whether or not they are enabled.
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if ($async && $pluginsfunction = get_plugins_with_function('course_module_background_deletion_recommended')) {
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foreach ($pluginsfunction as $plugintype => $plugins) {
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foreach ($plugins as $pluginfunction) {
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if ($pluginfunction()) {
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return $this->delete_async($sectioninfo, $forcedeleteifnotempty);
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}
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}
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}
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}
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return $this->delete_format_data(
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$sectioninfo,
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$forcedeleteifnotempty,
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$this->get_delete_event($sectioninfo)
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);
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}
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/**
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* Get the event to trigger when deleting a section.
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* @param section_info $sectioninfo the section to delete.
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* @return course_section_deleted the event to trigger
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*/
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protected function get_delete_event(section_info $sectioninfo): course_section_deleted {
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global $DB;
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// Section record is needed for the event snapshot.
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$sectionrecord = $DB->get_record('course_sections', ['id' => $sectioninfo->id]);
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$format = course_get_format($this->course);
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$sectionname = $format->get_section_name($sectioninfo);
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$context = \context_course::instance($this->course->id);
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$event = course_section_deleted::create(
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[
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'objectid' => $sectioninfo->id,
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'courseid' => $this->course->id,
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'context' => $context,
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'other' => [
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'sectionnum' => $sectioninfo->section,
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'sectionname' => $sectionname,
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],
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]
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);
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$event->add_record_snapshot('course_sections', $sectionrecord);
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return $event;
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}
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/**
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* Delete a course section.
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* @param section_info $sectioninfo the section to delete.
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* @param bool $forcedeleteifnotempty whether to force section deletion if it contains modules.
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* @param course_section_deleted $event the event to trigger
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* @return bool whether section was deleted
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*/
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protected function delete_format_data(
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section_info $sectioninfo,
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bool $forcedeleteifnotempty,
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course_section_deleted $event
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): bool {
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$format = course_get_format($this->course);
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$result = $format->delete_section($sectioninfo, $forcedeleteifnotempty);
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if ($result) {
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$event->trigger();
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}
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rebuild_course_cache($this->course->id, true);
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return $result;
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}
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/**
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* Course section deletion, using an adhoc task for deletion of the modules it contains.
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* 1. Schedule all modules within the section for adhoc removal.
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* 2. Move all modules to course section 0.
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* 3. Delete the resulting empty section.
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*
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* @param section_info $sectioninfo the section to schedule for deletion.
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* @param bool $forcedeleteifnotempty whether to force section deletion if it contains modules.
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* @return bool true if the section was scheduled for deletion, false otherwise.
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*/
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protected function delete_async(section_info $sectioninfo, bool $forcedeleteifnotempty = true): bool {
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global $DB, $USER;
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if (!$forcedeleteifnotempty && (!empty($sectioninfo->sequence) || !empty($sectioninfo->summary))) {
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return false;
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}
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// Event needs to be created before the section activities are moved to section 0.
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$event = $this->get_delete_event($sectioninfo);
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$affectedmods = $DB->get_records_select(
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'course_modules',
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'course = ? AND section = ? AND deletioninprogress <> ?',
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[$this->course->id, $sectioninfo->id, 1],
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'',
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'id'
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);
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// Flag those modules having no existing deletion flag. Some modules may have been
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// scheduled for deletion manually, and we don't want to create additional adhoc deletion
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// tasks for these. Moving them to section 0 will suffice.
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$DB->set_field(
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'course_modules',
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'deletioninprogress',
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'1',
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['course' => $this->course->id, 'section' => $sectioninfo->id]
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);
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// Move all modules to section 0.
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$sectionzero = $DB->get_record('course_sections', ['course' => $this->course->id, 'section' => '0']);
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$modules = $DB->get_records('course_modules', ['section' => $sectioninfo->id], '');
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foreach ($modules as $mod) {
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moveto_module($mod, $sectionzero);
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}
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$removaltask = new \core_course\task\course_delete_modules();
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$data = [
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'cms' => $affectedmods,
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'userid' => $USER->id,
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'realuserid' => \core\session\manager::get_realuser()->id,
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];
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$removaltask->set_custom_data($data);
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\core\task\manager::queue_adhoc_task($removaltask);
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// Ensure we have the latest section info.
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$sectioninfo = $this->get_section_info($sectioninfo->id);
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return $this->delete_format_data($sectioninfo, $forcedeleteifnotempty, $event);
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}
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/**
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* Update a course section.
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*
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* @param section_info $sectioninfo the section info or database record to update.
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* @param array|stdClass $fields the fields to update.
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* @return bool whether section was updated
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*/
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348 |
public function update(section_info $sectioninfo, array|stdClass $fields): bool {
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349 |
global $DB;
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350 |
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351 |
$courseid = $this->course->id;
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352 |
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353 |
// Some fields can not be updated using this method.
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354 |
$fields = array_diff_key((array) $fields, array_flip(['id', 'course', 'section', 'sequence']));
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355 |
if (array_key_exists('name', $fields) && \core_text::strlen($fields['name']) > 255) {
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356 |
throw new \moodle_exception('maximumchars', 'moodle', '', 255);
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357 |
}
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358 |
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359 |
// If the section is delegated to a component, it may control some section values.
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360 |
$fields = $this->preprocess_delegated_section_fields($sectioninfo, $fields);
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361 |
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362 |
if (empty($fields)) {
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|
363 |
return false;
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364 |
}
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365 |
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366 |
$fields['id'] = $sectioninfo->id;
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367 |
$fields['timemodified'] = time();
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|
368 |
$DB->update_record('course_sections', $fields);
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369 |
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370 |
// We need to update the section cache before the format options are updated.
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|
371 |
\course_modinfo::purge_course_section_cache_by_id($courseid, $sectioninfo->id);
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|
372 |
rebuild_course_cache($courseid, false, true);
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373 |
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374 |
course_get_format($courseid)->update_section_format_options($fields);
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375 |
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|
376 |
$event = \core\event\course_section_updated::create(
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|
377 |
[
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|
378 |
'objectid' => $sectioninfo->id,
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|
379 |
'courseid' => $courseid,
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|
380 |
'context' => \context_course::instance($courseid),
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|
381 |
'other' => ['sectionnum' => $sectioninfo->section],
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|
382 |
]
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|
383 |
);
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|
384 |
$event->trigger();
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|
385 |
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|
386 |
if (isset($fields['visible'])) {
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|
387 |
$this->transfer_visibility_to_cms($sectioninfo, (bool) $fields['visible']);
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|
388 |
}
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|
389 |
return true;
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|
390 |
}
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|
391 |
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|
392 |
/**
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|
393 |
* Transfer the visibility of the section to the course modules.
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|
394 |
*
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|
395 |
* @param section_info $sectioninfo the section info or database record to update.
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|
396 |
* @param bool $visibility the new visibility of the section.
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|
397 |
*/
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|
398 |
protected function transfer_visibility_to_cms(section_info $sectioninfo, bool $visibility): void {
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|
399 |
global $DB;
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|
400 |
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|
401 |
if (empty($sectioninfo->sequence) || $visibility == (bool) $sectioninfo->visible) {
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|
402 |
return;
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|
403 |
}
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|
404 |
|
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|
405 |
$modules = explode(',', $sectioninfo->sequence);
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|
406 |
$cmids = [];
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|
407 |
foreach ($modules as $moduleid) {
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|
408 |
$cm = get_coursemodule_from_id(null, $moduleid, $this->course->id);
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|
|
409 |
if (!$cm) {
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|
|
410 |
continue;
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|
411 |
}
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|
|
412 |
|
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|
413 |
$modupdated = false;
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|
|
414 |
if ($visibility) {
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|
|
415 |
// As we unhide the section, we use the previously saved visibility stored in visibleold.
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|
416 |
$modupdated = set_coursemodule_visible($moduleid, $cm->visibleold, $cm->visibleoncoursepage, false);
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|
417 |
} else {
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|
|
418 |
// We hide the section, so we hide the module but we store the original state in visibleold.
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|
|
419 |
$modupdated = set_coursemodule_visible($moduleid, 0, $cm->visibleoncoursepage, false);
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|
420 |
if ($modupdated) {
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|
421 |
$DB->set_field('course_modules', 'visibleold', $cm->visible, ['id' => $moduleid]);
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|
|
422 |
}
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|
|
423 |
}
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|
424 |
|
|
|
425 |
if ($modupdated) {
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|
426 |
$cmids[] = $cm->id;
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|
|
427 |
course_module_updated::create_from_cm($cm)->trigger();
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|
|
428 |
}
|
|
|
429 |
}
|
|
|
430 |
|
|
|
431 |
\course_modinfo::purge_course_modules_cache($this->course->id, $cmids);
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|
|
432 |
rebuild_course_cache($this->course->id, false, true);
|
|
|
433 |
}
|
|
|
434 |
|
|
|
435 |
/**
|
|
|
436 |
* Preprocess the section fields before updating a delegated section.
|
|
|
437 |
*
|
|
|
438 |
* @param section_info $sectioninfo the section info or database record to update.
|
|
|
439 |
* @param array $fields the fields to update.
|
|
|
440 |
* @return array the updated fields
|
|
|
441 |
*/
|
|
|
442 |
protected function preprocess_delegated_section_fields(section_info $sectioninfo, array $fields): array {
|
|
|
443 |
$delegated = $sectioninfo->get_component_instance();
|
|
|
444 |
if (!$delegated) {
|
|
|
445 |
return $fields;
|
|
|
446 |
}
|
|
|
447 |
if (array_key_exists('name', $fields)) {
|
|
|
448 |
$fields['name'] = $delegated->preprocess_section_name($sectioninfo, $fields['name']);
|
|
|
449 |
}
|
|
|
450 |
return $fields;
|
|
|
451 |
}
|
|
|
452 |
}
|