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128 lines
4.0 KiB
128 lines
4.0 KiB
<?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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/**
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* Functions used by the health tool.
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*
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* @package tool_health
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* @copyright 2013 Marko Vidberg
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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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defined('MOODLE_INTERNAL') || die();
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/**
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* Given a list of categories, this function searches for ones
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* that have a missing parent category.
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*
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* @param array $categories List of categories.
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* @return array List of categories with missing parents.
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*/
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function tool_health_category_find_missing_parents($categories) {
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$missingparent = array();
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foreach ($categories as $category) {
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if ($category->parent != 0 && !array_key_exists($category->parent, $categories)) {
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$missingparent[$category->id] = $category;
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}
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}
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return $missingparent;
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}
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/**
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* Generates a list of categories with missing parents.
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*
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* @param array $missingparent List of categories with missing parents.
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* @return string Bullet point list of categories with missing parents.
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*/
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function tool_health_category_list_missing_parents($missingparent) {
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$description = '';
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if (!empty($missingparent)) {
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$description .= '<p>The following categories are missing their parents:</p><ul>';
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foreach ($missingparent as $cat) {
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$description .= "<li>Category $cat->id: " . s($cat->name) . "</li>\n";
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}
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$description .= "</ul>\n";
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}
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return $description;
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}
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/**
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* Given a list of categories, this function searches for ones
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* that have loops to previous parent categories.
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*
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* @param array $categories List of categories.
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* @return array List of categories with loops.
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*/
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function tool_health_category_find_loops($categories) {
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$loops = array();
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while (!empty($categories)) {
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$current = array_pop($categories);
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$thisloop = array($current->id => $current);
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while (true) {
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if (isset($thisloop[$current->parent])) {
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// Loop detected.
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$loops = $loops + $thisloop;
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break;
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} else if ($current->parent === 0) {
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// Top level.
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break;
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} else if (isset($loops[$current->parent])) {
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// If the parent is in a loop we should also update this category.
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$loops = $loops + $thisloop;
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break;
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} else if (!isset($categories[$current->parent])) {
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// We already checked this category and is correct.
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break;
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} else {
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// Continue following the path.
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$current = $categories[$current->parent];
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$thisloop[$current->id] = $current;
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unset($categories[$current->id]);
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}
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}
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}
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return $loops;
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}
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/**
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* Generates a list of categories with loops.
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*
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* @param array $loops List of categories with loops.
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* @return string Bullet point list of categories with loops.
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*/
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function tool_health_category_list_loops($loops) {
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$description = '';
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if (!empty($loops)) {
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$description .= '<p>The following categories form a loop of parents:</p><ul>';
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foreach ($loops as $loop) {
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$description .= "<li>\n";
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$description .= "Category $loop->id: " . s($loop->name) . " has parent $loop->parent\n";
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$description .= "</li>\n";
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}
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$description .= "</ul>\n";
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}
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return $description;
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}
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