/question/category_class.php
PHP | 609 lines | 348 code | 73 blank | 188 comment | 56 complexity | fab063632be2dbd662b1d5659855a29e MD5 | raw file
Possible License(s): MIT, AGPL-3.0, MPL-2.0-no-copyleft-exception, LGPL-3.0, GPL-3.0, Apache-2.0, LGPL-2.1, BSD-3-Clause
- <?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/>.
- /**
- * A class for representing question categories.
- *
- * @package moodlecore
- * @subpackage questionbank
- * @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com}
- * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
- defined('MOODLE_INTERNAL') || die();
- // number of categories to display on page
- define('QUESTION_PAGE_LENGTH', 25);
- require_once($CFG->libdir . '/listlib.php');
- require_once($CFG->dirroot . '/question/category_form.php');
- require_once($CFG->dirroot . '/question/move_form.php');
- /**
- * Class representing a list of question categories
- *
- * @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com}
- * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
- class question_category_list extends moodle_list {
- public $table = "question_categories";
- public $listitemclassname = 'question_category_list_item';
- /**
- * @var reference to list displayed below this one.
- */
- public $nextlist = null;
- /**
- * @var reference to list displayed above this one.
- */
- public $lastlist = null;
- public $context = null;
- public $sortby = 'parent, sortorder, name';
- public function __construct($type='ul', $attributes='', $editable = false, $pageurl=null, $page = 0, $pageparamname = 'page', $itemsperpage = 20, $context = null){
- parent::__construct('ul', '', $editable, $pageurl, $page, 'cpage', $itemsperpage);
- $this->context = $context;
- }
- public function get_records() {
- $this->records = get_categories_for_contexts($this->context->id, $this->sortby);
- }
- /**
- * Returns the highest category id that the $item can have as its parent.
- * Note: question categories cannot go higher than the TOP category.
- *
- * @param list_item $item The item which its top level parent is going to be returned.
- * @return int
- */
- public function get_top_level_parent_id($item) {
- // Put the item at the highest level it can go.
- $topcategory = question_get_top_category($item->item->contextid, true);
- return $topcategory->id;
- }
- /**
- * process any actions.
- *
- * @param integer $left id of item to move left
- * @param integer $right id of item to move right
- * @param integer $moveup id of item to move up
- * @param integer $movedown id of item to move down
- * @return void
- * @throws coding_exception
- */
- public function process_actions($left, $right, $moveup, $movedown) {
- $category = new stdClass();
- if (!empty($left)) {
- // Moved Left (In to another category).
- $category->id = $left;
- $category->contextid = $this->context->id;
- $event = \core\event\question_category_moved::create_from_question_category_instance($category);
- $event->trigger();
- } else if (!empty($right)) {
- // Moved Right (Out of the current category).
- $category->id = $right;
- $category->contextid = $this->context->id;
- $event = \core\event\question_category_moved::create_from_question_category_instance($category);
- $event->trigger();
- }
- parent::process_actions($left, $right, $moveup, $movedown);
- }
- }
- /**
- * An item in a list of question categories.
- *
- * @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com}
- * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
- class question_category_list_item extends list_item {
- public function set_icon_html($first, $last, $lastitem){
- global $CFG;
- $category = $this->item;
- $url = new moodle_url('/question/category.php', ($this->parentlist->pageurl->params() + array('edit'=>$category->id)));
- $this->icons['edit']= $this->image_icon(get_string('editthiscategory', 'question'), $url, 'edit');
- parent::set_icon_html($first, $last, $lastitem);
- $toplevel = ($this->parentlist->parentitem === null);//this is a top level item
- if (($this->parentlist->nextlist !== null) && $last && $toplevel && (count($this->parentlist->items)>1)){
- $url = new moodle_url($this->parentlist->pageurl, array('movedowncontext'=>$this->id, 'tocontext'=>$this->parentlist->nextlist->context->id, 'sesskey'=>sesskey()));
- $this->icons['down'] = $this->image_icon(
- get_string('shareincontext', 'question', $this->parentlist->nextlist->context->get_context_name()), $url, 'down');
- }
- if (($this->parentlist->lastlist !== null) && $first && $toplevel && (count($this->parentlist->items)>1)){
- $url = new moodle_url($this->parentlist->pageurl, array('moveupcontext'=>$this->id, 'tocontext'=>$this->parentlist->lastlist->context->id, 'sesskey'=>sesskey()));
- $this->icons['up'] = $this->image_icon(
- get_string('shareincontext', 'question', $this->parentlist->lastlist->context->get_context_name()), $url, 'up');
- }
- }
- public function item_html($extraargs = array()){
- global $CFG, $OUTPUT;
- $str = $extraargs['str'];
- $category = $this->item;
- $editqestions = get_string('editquestions', 'question');
- // Each section adds html to be displayed as part of this list item.
- $questionbankurl = new moodle_url('/question/edit.php', $this->parentlist->pageurl->params());
- $questionbankurl->param('cat', $category->id . ',' . $category->contextid);
- $item = '';
- $text = format_string($category->name, true, ['context' => $this->parentlist->context]);
- if ($category->idnumber !== null && $category->idnumber !== '') {
- $text .= ' ' . html_writer::span(
- html_writer::span(get_string('idnumber', 'question'), 'accesshide') .
- ' ' . $category->idnumber, 'badge badge-primary');
- }
- $text .= ' (' . $category->questioncount . ')';
- $item .= html_writer::tag('b', html_writer::link($questionbankurl, $text,
- ['title' => $editqestions]) . ' ');
- $item .= format_text($category->info, $category->infoformat,
- array('context' => $this->parentlist->context, 'noclean' => true));
- // Don't allow delete if this is the top category, or the last editable category in this context.
- if ($category->parent && !question_is_only_child_of_top_category_in_context($category->id)) {
- $deleteurl = new moodle_url($this->parentlist->pageurl, array('delete' => $this->id, 'sesskey' => sesskey()));
- $item .= html_writer::link($deleteurl,
- $OUTPUT->pix_icon('t/delete', $str->delete),
- array('title' => $str->delete));
- }
- return $item;
- }
- }
- /**
- * Class for performing operations on question categories.
- *
- * @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com}
- * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
- class question_category_object {
- /**
- * @var array common language strings.
- */
- public $str;
- /**
- * @var array nested lists to display categories.
- */
- public $editlists = array();
- public $tab;
- public $tabsize = 3;
- /**
- * @var moodle_url Object representing url for this page
- */
- public $pageurl;
- /**
- * @var question_category_edit_form Object representing form for adding / editing categories.
- */
- public $catform;
- /**
- * Constructor.
- *
- * @param int $page page number
- * @param moodle_url $pageurl base URL of the display categories page. Used for redirects.
- * @param context[] $contexts contexts where the current user can edit categories.
- * @param int $currentcat id of the category to be edited. 0 if none.
- * @param int|null $defaultcategory id of the current category. null if none.
- * @param int $todelete id of the category to delete. 0 if none.
- * @param context[] $addcontexts contexts where the current user can add questions.
- */
- public function __construct($page, $pageurl, $contexts, $currentcat, $defaultcategory, $todelete, $addcontexts) {
- $this->tab = str_repeat(' ', $this->tabsize);
- $this->str = new stdClass();
- $this->str->course = get_string('course');
- $this->str->category = get_string('category', 'question');
- $this->str->categoryinfo = get_string('categoryinfo', 'question');
- $this->str->questions = get_string('questions', 'question');
- $this->str->add = get_string('add');
- $this->str->delete = get_string('delete');
- $this->str->moveup = get_string('moveup');
- $this->str->movedown = get_string('movedown');
- $this->str->edit = get_string('editthiscategory', 'question');
- $this->str->hide = get_string('hide');
- $this->str->order = get_string('order');
- $this->str->parent = get_string('parent', 'question');
- $this->str->add = get_string('add');
- $this->str->action = get_string('action');
- $this->str->top = get_string('top');
- $this->str->addcategory = get_string('addcategory', 'question');
- $this->str->editcategory = get_string('editcategory', 'question');
- $this->str->cancel = get_string('cancel');
- $this->str->editcategories = get_string('editcategories', 'question');
- $this->str->page = get_string('page');
- $this->pageurl = $pageurl;
- $this->initialize($page, $contexts, $currentcat, $defaultcategory, $todelete, $addcontexts);
- }
- /**
- * Old syntax of class constructor. Deprecated in PHP7.
- *
- * @deprecated since Moodle 3.1
- */
- public function question_category_object($page, $pageurl, $contexts, $currentcat, $defaultcategory, $todelete, $addcontexts) {
- debugging('Use of class name as constructor is deprecated', DEBUG_DEVELOPER);
- self::__construct($page, $pageurl, $contexts, $currentcat, $defaultcategory, $todelete, $addcontexts);
- }
- /**
- * Initializes this classes general category-related variables
- */
- public function initialize($page, $contexts, $currentcat, $defaultcategory, $todelete, $addcontexts) {
- $lastlist = null;
- foreach ($contexts as $context){
- $this->editlists[$context->id] = new question_category_list('ul', '', true, $this->pageurl, $page, 'cpage', QUESTION_PAGE_LENGTH, $context);
- $this->editlists[$context->id]->lastlist =& $lastlist;
- if ($lastlist!== null){
- $lastlist->nextlist =& $this->editlists[$context->id];
- }
- $lastlist =& $this->editlists[$context->id];
- }
- $count = 1;
- $paged = false;
- foreach ($this->editlists as $key => $list){
- list($paged, $count) = $this->editlists[$key]->list_from_records($paged, $count);
- }
- $this->catform = new question_category_edit_form($this->pageurl, compact('contexts', 'currentcat'));
- if (!$currentcat){
- $this->catform->set_data(array('parent'=>$defaultcategory));
- }
- }
- /**
- * Displays the user interface
- *
- */
- public function display_user_interface() {
- /// Interface for editing existing categories
- $this->output_edit_lists();
- echo '<br />';
- /// Interface for adding a new category:
- $this->output_new_table();
- echo '<br />';
- }
- /**
- * Outputs a table to allow entry of a new category
- */
- public function output_new_table() {
- $this->catform->display();
- }
- /**
- * Outputs a list to allow editing/rearranging of existing categories
- *
- * $this->initialize() must have already been called
- *
- */
- public function output_edit_lists() {
- global $OUTPUT;
- echo $OUTPUT->heading_with_help(get_string('editcategories', 'question'), 'editcategories', 'question');
- foreach ($this->editlists as $context => $list){
- $listhtml = $list->to_html(0, array('str'=>$this->str));
- if ($listhtml){
- echo $OUTPUT->box_start('boxwidthwide boxaligncenter generalbox questioncategories contextlevel' . $list->context->contextlevel);
- $fullcontext = context::instance_by_id($context);
- echo $OUTPUT->heading(get_string('questioncatsfor', 'question', $fullcontext->get_context_name()), 3);
- echo $listhtml;
- echo $OUTPUT->box_end();
- }
- }
- echo $list->display_page_numbers();
- }
- /**
- * gets all the courseids for the given categories
- *
- * @param array categories contains category objects in a tree representation
- * @return array courseids flat array in form categoryid=>courseid
- */
- public function get_course_ids($categories) {
- $courseids = array();
- foreach ($categories as $key=>$cat) {
- $courseids[$key] = $cat->course;
- if (!empty($cat->children)) {
- $courseids = array_merge($courseids, $this->get_course_ids($cat->children));
- }
- }
- return $courseids;
- }
- public function edit_single_category($categoryid) {
- /// Interface for adding a new category
- global $DB;
- /// Interface for editing existing categories
- $category = $DB->get_record("question_categories", array("id" => $categoryid));
- if (empty($category)) {
- print_error('invalidcategory', '', '', $categoryid);
- } else if ($category->parent == 0) {
- print_error('cannotedittopcat', 'question', '', $categoryid);
- } else {
- $category->parent = "{$category->parent},{$category->contextid}";
- $category->submitbutton = get_string('savechanges');
- $category->categoryheader = $this->str->edit;
- $this->catform->set_data($category);
- $this->catform->display();
- }
- }
- /**
- * Sets the viable parents
- *
- * Viable parents are any except for the category itself, or any of it's descendants
- * The parentstrings parameter is passed by reference and changed by this function.
- *
- * @param array parentstrings a list of parentstrings
- * @param object category
- */
- public function set_viable_parents(&$parentstrings, $category) {
- unset($parentstrings[$category->id]);
- if (isset($category->children)) {
- foreach ($category->children as $child) {
- $this->set_viable_parents($parentstrings, $child);
- }
- }
- }
- /**
- * Gets question categories
- *
- * @param int parent - if given, restrict records to those with this parent id.
- * @param string sort - [[sortfield [,sortfield]] {ASC|DESC}]
- * @return array categories
- */
- public function get_question_categories($parent=null, $sort="sortorder ASC") {
- global $COURSE, $DB;
- if (is_null($parent)) {
- $categories = $DB->get_records('question_categories', array('course' => $COURSE->id), $sort);
- } else {
- $select = "parent = ? AND course = ?";
- $categories = $DB->get_records_select('question_categories', $select, array($parent, $COURSE->id), $sort);
- }
- return $categories;
- }
- /**
- * Deletes an existing question category
- *
- * @param int deletecat id of category to delete
- */
- public function delete_category($categoryid) {
- global $CFG, $DB;
- question_can_delete_cat($categoryid);
- if (!$category = $DB->get_record("question_categories", array("id" => $categoryid))) { // security
- print_error('unknowcategory');
- }
- /// Send the children categories to live with their grandparent
- $DB->set_field("question_categories", "parent", $category->parent, array("parent" => $category->id));
- /// Finally delete the category itself
- $DB->delete_records("question_categories", array("id" => $category->id));
- // Log the deletion of this category.
- $event = \core\event\question_category_deleted::create_from_question_category_instance($category);
- $event->add_record_snapshot('question_categories', $category);
- $event->trigger();
- }
- public function move_questions_and_delete_category($oldcat, $newcat){
- question_can_delete_cat($oldcat);
- $this->move_questions($oldcat, $newcat);
- $this->delete_category($oldcat);
- }
- public function display_move_form($questionsincategory, $category){
- global $OUTPUT;
- $vars = new stdClass();
- $vars->name = $category->name;
- $vars->count = $questionsincategory;
- echo $OUTPUT->box(get_string('categorymove', 'question', $vars), 'generalbox boxaligncenter');
- $this->moveform->display();
- }
- public function move_questions($oldcat, $newcat){
- global $DB;
- $questionids = $DB->get_records_select_menu('question',
- 'category = ? AND (parent = 0 OR parent = id)', array($oldcat), '', 'id,1');
- question_move_questions_to_category(array_keys($questionids), $newcat);
- }
- /**
- * Create a new category.
- *
- * Data is expected to come from question_category_edit_form.
- *
- * By default redirects on success, unless $return is true.
- *
- * @param string $newparent 'categoryid,contextid' of the parent category.
- * @param string $newcategory the name.
- * @param string $newinfo the description.
- * @param bool $return if true, return rather than redirecting.
- * @param int|string $newinfoformat description format. One of the FORMAT_ constants.
- * @param null $idnumber the idnumber. '' is converted to null.
- * @return bool|int New category id if successful, else false.
- */
- public function add_category($newparent, $newcategory, $newinfo, $return = false, $newinfoformat = FORMAT_HTML,
- $idnumber = null) {
- global $DB;
- if (empty($newcategory)) {
- print_error('categorynamecantbeblank', 'question');
- }
- list($parentid, $contextid) = explode(',', $newparent);
- //moodle_form makes sure select element output is legal no need for further cleaning
- require_capability('moodle/question:managecategory', context::instance_by_id($contextid));
- if ($parentid) {
- if(!($DB->get_field('question_categories', 'contextid', array('id' => $parentid)) == $contextid)) {
- print_error('cannotinsertquestioncatecontext', 'question', '', array('cat'=>$newcategory, 'ctx'=>$contextid));
- }
- }
- if ((string) $idnumber === '') {
- $idnumber = null;
- } else if (!empty($contextid)) {
- // While this check already exists in the form validation, this is a backstop preventing unnecessary errors.
- if ($DB->record_exists('question_categories',
- ['idnumber' => $idnumber, 'contextid' => $contextid])) {
- $idnumber = null;
- }
- }
- $cat = new stdClass();
- $cat->parent = $parentid;
- $cat->contextid = $contextid;
- $cat->name = $newcategory;
- $cat->info = $newinfo;
- $cat->infoformat = $newinfoformat;
- $cat->sortorder = 999;
- $cat->stamp = make_unique_id_code();
- $cat->idnumber = $idnumber;
- $categoryid = $DB->insert_record("question_categories", $cat);
- // Log the creation of this category.
- $category = new stdClass();
- $category->id = $categoryid;
- $category->contextid = $contextid;
- $event = \core\event\question_category_created::create_from_question_category_instance($category);
- $event->trigger();
- if ($return) {
- return $categoryid;
- } else {
- redirect($this->pageurl);//always redirect after successful action
- }
- }
- /**
- * Updates an existing category with given params.
- *
- * Warning! parameter order and meaning confusingly different from add_category in some ways!
- *
- * @param int $updateid id of the category to update.
- * @param int $newparent 'categoryid,contextid' of the parent category to set.
- * @param string $newname category name.
- * @param string $newinfo category description.
- * @param int|string $newinfoformat description format. One of the FORMAT_ constants.
- * @param int $idnumber the idnumber. '' is converted to null.
- * @param bool $redirect if true, will redirect once the DB is updated (default).
- */
- public function update_category($updateid, $newparent, $newname, $newinfo, $newinfoformat = FORMAT_HTML,
- $idnumber = null, $redirect = true) {
- global $CFG, $DB;
- if (empty($newname)) {
- print_error('categorynamecantbeblank', 'question');
- }
- // Get the record we are updating.
- $oldcat = $DB->get_record('question_categories', array('id' => $updateid));
- $lastcategoryinthiscontext = question_is_only_child_of_top_category_in_context($updateid);
- if (!empty($newparent) && !$lastcategoryinthiscontext) {
- list($parentid, $tocontextid) = explode(',', $newparent);
- } else {
- $parentid = $oldcat->parent;
- $tocontextid = $oldcat->contextid;
- }
- // Check permissions.
- $fromcontext = context::instance_by_id($oldcat->contextid);
- require_capability('moodle/question:managecategory', $fromcontext);
- // If moving to another context, check permissions some more, and confirm contextid,stamp uniqueness.
- $newstamprequired = false;
- if ($oldcat->contextid != $tocontextid) {
- $tocontext = context::instance_by_id($tocontextid);
- require_capability('moodle/question:managecategory', $tocontext);
- // Confirm stamp uniqueness in the new context. If the stamp already exists, generate a new one.
- if ($DB->record_exists('question_categories', array('contextid' => $tocontextid, 'stamp' => $oldcat->stamp))) {
- $newstamprequired = true;
- }
- }
- if ((string) $idnumber === '') {
- $idnumber = null;
- } else if (!empty($tocontextid)) {
- // While this check already exists in the form validation, this is a backstop preventing unnecessary errors.
- if ($DB->record_exists_select('question_categories',
- 'idnumber = ? AND contextid = ? AND id <> ?',
- [$idnumber, $tocontextid, $updateid])) {
- $idnumber = null;
- }
- }
- // Update the category record.
- $cat = new stdClass();
- $cat->id = $updateid;
- $cat->name = $newname;
- $cat->info = $newinfo;
- $cat->infoformat = $newinfoformat;
- $cat->parent = $parentid;
- $cat->contextid = $tocontextid;
- $cat->idnumber = $idnumber;
- if ($newstamprequired) {
- $cat->stamp = make_unique_id_code();
- }
- $DB->update_record('question_categories', $cat);
- // Log the update of this category.
- $event = \core\event\question_category_updated::create_from_question_category_instance($cat);
- $event->trigger();
- // If the category name has changed, rename any random questions in that category.
- if ($oldcat->name != $cat->name) {
- $where = "qtype = 'random' AND category = ? AND " . $DB->sql_compare_text('questiontext') . " = ?";
- $randomqtype = question_bank::get_qtype('random');
- $randomqname = $randomqtype->question_name($cat, false);
- $DB->set_field_select('question', 'name', $randomqname, $where, array($cat->id, '0'));
- $randomqname = $randomqtype->question_name($cat, true);
- $DB->set_field_select('question', 'name', $randomqname, $where, array($cat->id, '1'));
- }
- if ($oldcat->contextid != $tocontextid) {
- // Moving to a new context. Must move files belonging to questions.
- question_move_category_to_context($cat->id, $oldcat->contextid, $tocontextid);
- }
- // Cat param depends on the context id, so update it.
- $this->pageurl->param('cat', $updateid . ',' . $tocontextid);
- if ($redirect) {
- redirect($this->pageurl); // Always redirect after successful action.
- }
- }
- }