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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 qbank_managecategories;
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use context;
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use moodle_url;
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/**
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* Builds a tree for categories for rendering the category management page.
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*
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* @package qbank_managecategories
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* @copyright 2024 Catalyst IT Europe Ltd.
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* @author Mark Johnson <mark.johnson@catalyst-eu.net>
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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 question_categories {
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/**
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* @var moodle_url Object representing url for this page
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*/
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public moodle_url $pageurl;
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/**
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* @var ?int cmid.
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*/
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public ?int $cmid;
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/**
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* @var ?int courseid.
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*/
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public ?int $courseid;
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/**
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* @var ?int The context ID of the current page.
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*/
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public ?int $contextid;
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/**
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* @var array An array containing a tree of categories for each context.
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*/
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public array $editlists;
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/**
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* Constructor.
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*
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* @param moodle_url $pageurl base URL of the display categories page. Used for redirects.
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* @param context[] $contexts contexts where the current user can edit categories.
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* @param ?int $cmid course module id for the current page.
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* @param ?int $courseid course id for the current page.
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* @param ?int $thiscontext The context ID of the current page.
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*/
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public function __construct(
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moodle_url $pageurl,
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array $contexts,
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?int $cmid = null,
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?int $courseid = null,
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?int $thiscontext = null,
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) {
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global $DB;
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$this->cmid = $cmid;
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$this->courseid = $courseid;
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$this->pageurl = $pageurl;
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$this->contextid = $thiscontext;
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$contextids = array_map(fn($context) => $context->id, $contexts);
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[$insql, $params] = $DB->get_in_or_equal($contextids);
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$topcategories = $DB->get_records_select_menu(
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'question_categories',
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'parent = 0 AND contextid ' . $insql,
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$params,
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fields: 'contextid, id'
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);
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foreach ($contexts as $context) {
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// We can only have categories in module context.
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if ($context->contextlevel !== CONTEXT_MODULE) {
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continue;
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}
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$items = helper::get_categories_for_contexts($context->id);
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// Create an ordered tree with children correctly nested under parents.
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foreach ($items as $item) {
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if (array_key_exists((int) $item->parent, $items)) {
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$item->parentitem = $items[$item->parent];
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$items[$item->parent]->children[$item->id] = $item;
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}
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}
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foreach ($items as $item) {
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if (isset($item->children)) {
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foreach ($item->children as $children) {
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unset($items[$children->id]);
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}
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}
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}
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$this->editlists[$context->id] = (object) [
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'items' => $items,
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'context' => $context,
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'categoryid' => $topcategories[$context->id],
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];
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}
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}
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}
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