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2359 lines
92 KiB
PHP
2359 lines
92 KiB
PHP
<?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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* Code for handling and processing questions.
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*
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* This is code that is module independent, i.e., can be used by any module that
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* uses questions, like quiz, lesson, etc.
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* This script also loads the questiontype classes.
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* Code for handling the editing of questions is in question/editlib.php
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*
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* @package core
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* @subpackage questionbank
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* @copyright 1999 onwards Martin Dougiamas and others {@link http://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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use core_question\local\bank\question_version_status;
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use core_question\question_reference_manager;
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defined('MOODLE_INTERNAL') || die();
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require_once($CFG->dirroot . '/question/engine/lib.php');
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require_once($CFG->dirroot . '/question/type/questiontypebase.php');
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// CONSTANTS.
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/**
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* Constant determines the number of answer boxes supplied in the editing
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* form for multiple choice and similar question types.
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*/
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define("QUESTION_NUMANS", 10);
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/**
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* Constant determines the number of answer boxes supplied in the editing
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* form for multiple choice and similar question types to start with, with
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* the option of adding QUESTION_NUMANS_ADD more answers.
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*/
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define("QUESTION_NUMANS_START", 3);
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/**
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* Constant determines the number of answer boxes to add in the editing
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* form for multiple choice and similar question types when the user presses
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* 'add form fields button'.
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*/
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define("QUESTION_NUMANS_ADD", 3);
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/**
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* Move one question type in a list of question types. If you try to move one element
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* off of the end, nothing will change.
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*
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* @param array $sortedqtypes An array $qtype => anything.
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* @param string $tomove one of the keys from $sortedqtypes
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* @param integer $direction +1 or -1
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* @return array an array $index => $qtype, with $index from 0 to n in order, and
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* the $qtypes in the same order as $sortedqtypes, except that $tomove will
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* have been moved one place.
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*/
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function question_reorder_qtypes($sortedqtypes, $tomove, $direction): array {
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$neworder = array_keys($sortedqtypes);
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// Find the element to move.
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$key = array_search($tomove, $neworder);
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if ($key === false) {
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return $neworder;
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}
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// Work out the other index.
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$otherkey = $key + $direction;
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if (!isset($neworder[$otherkey])) {
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return $neworder;
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}
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// Do the swap.
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$swap = $neworder[$otherkey];
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$neworder[$otherkey] = $neworder[$key];
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$neworder[$key] = $swap;
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return $neworder;
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}
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/**
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* Save a new question type order to the config_plugins table.
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*
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* @param array $neworder An arra $index => $qtype. Indices should start at 0 and be in order.
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* @param object $config get_config('question'), if you happen to have it around, to save one DB query.
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*/
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function question_save_qtype_order($neworder, $config = null): void {
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if (is_null($config)) {
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$config = get_config('question');
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}
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foreach ($neworder as $index => $qtype) {
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$sortvar = $qtype . '_sortorder';
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if (!isset($config->$sortvar) || $config->$sortvar != $index + 1) {
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set_config($sortvar, $index + 1, 'question');
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}
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}
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}
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// FUNCTIONS.
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/**
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* Check if the question is used.
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*
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* @param array $questionids of question ids.
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* @return boolean whether any of these questions are being used by any part of Moodle.
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*/
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function questions_in_use($questionids): bool {
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// Are they used by the core question system?
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if (question_engine::questions_in_use($questionids)) {
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return true;
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}
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if (question_reference_manager::questions_with_references($questionids)) {
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return true;
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}
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// Check if any plugins are using these questions.
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$callbacksbytype = get_plugins_with_function('questions_in_use');
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foreach ($callbacksbytype as $callbacks) {
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foreach ($callbacks as $function) {
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if ($function($questionids)) {
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return true;
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}
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}
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}
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// Finally check legacy callback.
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$legacycallbacks = get_plugin_list_with_function('mod', 'question_list_instances');
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foreach ($legacycallbacks as $plugin => $function) {
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debugging($plugin . ' implements deprecated method ' . $function .
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'. ' . $plugin . '_questions_in_use should be implemented instead.', DEBUG_DEVELOPER);
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if (isset($callbacksbytype['mod'][substr($plugin, 4)])) {
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continue; // Already done.
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}
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foreach ($questionids as $questionid) {
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if (!empty($function($questionid))) {
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return true;
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}
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}
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}
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return false;
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}
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/**
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* Determine whether there are any questions belonging to this context, that is whether any of its
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* question categories contain any questions. This will return true even if all the questions are
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* hidden.
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*
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* @param mixed $context either a context object, or a context id.
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* @return boolean whether any of the question categories beloning to this context have
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* any questions in them.
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*/
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function question_context_has_any_questions($context): bool {
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global $DB;
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if (is_object($context)) {
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$contextid = $context->id;
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} else if (is_numeric($context)) {
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$contextid = $context;
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} else {
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throw new moodle_exception('invalidcontextinhasanyquestions', 'question');
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}
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$sql = 'SELECT qbe.*
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FROM {question_bank_entries} qbe
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JOIN {question_categories} qc ON qc.id = qbe.questioncategoryid
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WHERE qc.contextid = ?';
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return $DB->record_exists_sql($sql, [$contextid]);
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}
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/**
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* Check whether a given grade is one of a list of allowed options. If not,
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* depending on $matchgrades, either return the nearest match, or return false
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* to signal an error.
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*
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* @param array $gradeoptionsfull list of valid options
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* @param int $grade grade to be tested
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* @param string $matchgrades 'error' or 'nearest'
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* @return false|int|string either 'fixed' value or false if error.
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*/
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function match_grade_options($gradeoptionsfull, $grade, $matchgrades = 'error') {
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if ($matchgrades == 'error') {
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// ...(Almost) exact match, or an error.
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foreach ($gradeoptionsfull as $value => $option) {
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// Slightly fuzzy test, never check floats for equality.
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if (abs($grade - $value) < 0.00001) {
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return $value; // Be sure the return the proper value.
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}
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}
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// Didn't find a match so that's an error.
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return false;
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} else if ($matchgrades == 'nearest') {
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// Work out nearest value.
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$best = false;
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$bestmismatch = 2;
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foreach ($gradeoptionsfull as $value => $option) {
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$newmismatch = abs($grade - $value);
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if ($newmismatch < $bestmismatch) {
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$best = $value;
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$bestmismatch = $newmismatch;
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}
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}
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return $best;
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} else {
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// Unknow option passed.
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throw new coding_exception('Unknown $matchgrades ' . $matchgrades .
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' passed to match_grade_options');
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}
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}
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/**
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* Category is about to be deleted,
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* 1/ All questions are deleted for this question category.
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* 2/ Any questions that can't be deleted are moved to a new category
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* NOTE: this function is called from lib/db/upgrade.php
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*
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* @param object|core_course_category $category course category object
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*/
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function question_category_delete_safe($category): void {
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global $DB;
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$criteria = ['questioncategoryid' => $category->id];
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$context = context::instance_by_id($category->contextid, IGNORE_MISSING);
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$rescue = null; // See the code around the call to question_save_from_deletion.
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// Deal with any questions in the category.
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if ($questionentries = $DB->get_records('question_bank_entries', $criteria, '', 'id')) {
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foreach ($questionentries as $questionentry) {
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$questionids = $DB->get_records('question_versions',
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['questionbankentryid' => $questionentry->id], '', 'questionid');
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// Try to delete each question.
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foreach ($questionids as $questionid) {
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question_delete_question($questionid->questionid, $category->contextid);
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}
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}
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// Check to see if there were any questions that were kept because
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// they are still in use somehow, even though quizzes in courses
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// in this category will already have been deleted. This could
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// happen, for example, if questions are added to a course,
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// and then that course is moved to another category (MDL-14802).
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$questionids = [];
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foreach ($questionentries as $questionentry) {
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$versions = $DB->get_records('question_versions', ['questionbankentryid' => $questionentry->id], '', 'questionid');
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foreach ($versions as $key => $version) {
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$questionids[$key] = $version;
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}
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}
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if (!empty($questionids)) {
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$parentcontextid = SYSCONTEXTID;
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$name = get_string('unknown', 'question');
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if ($context !== false) {
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$name = $context->get_context_name();
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$parentcontext = $context->get_parent_context();
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if ($parentcontext) {
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$parentcontextid = $parentcontext->id;
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}
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}
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question_save_from_deletion(array_keys($questionids), $parentcontextid, $name, $rescue);
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}
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}
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// Now delete the category.
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$DB->delete_records('question_categories', ['id' => $category->id]);
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}
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/**
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* Tests whether any question in a category is used by any part of Moodle.
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*
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* @param integer $categoryid a question category id.
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* @param boolean $recursive whether to check child categories too.
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* @return boolean whether any question in this category is in use.
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*/
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function question_category_in_use($categoryid, $recursive = false): bool {
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global $DB;
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// Look at each question in the category.
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$questionids = question_bank::get_finder()->get_questions_from_categories([$categoryid], null);
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if ($questionids) {
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if (questions_in_use(array_keys($questionids))) {
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return true;
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}
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}
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if (!$recursive) {
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return false;
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}
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// Look under child categories recursively.
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if ($children = $DB->get_records('question_categories',
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['parent' => $categoryid], '', 'id, 1')) {
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foreach ($children as $child) {
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if (question_category_in_use($child->id, $recursive)) {
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return true;
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}
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}
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}
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return false;
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}
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/**
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* Check if there is more versions left for the entry.
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* If not delete the entry.
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*
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* @param int $entryid
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*/
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function delete_question_bank_entry($entryid): void {
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global $DB;
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if (!$DB->record_exists('question_versions', ['questionbankentryid' => $entryid])) {
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$DB->delete_records('question_bank_entries', ['id' => $entryid]);
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}
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}
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/**
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* Deletes question and all associated data from the database
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*
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* It will not delete a question if it is used somewhere, instead it will just delete the reference.
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*
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* @param int $questionid The id of the question being deleted
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*/
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function question_delete_question($questionid): void {
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global $DB;
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$question = $DB->get_record('question', ['id' => $questionid]);
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if (!$question) {
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// In some situations, for example if this was a child of a
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// Cloze question that was previously deleted, the question may already
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// have gone. In this case, just do nothing.
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return;
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}
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$sql = 'SELECT qv.id as versionid,
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qv.version,
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qbe.id as entryid,
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qc.id as categoryid,
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ctx.id as contextid
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FROM {question} q
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LEFT JOIN {question_versions} qv ON qv.questionid = q.id
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LEFT JOIN {question_bank_entries} qbe ON qbe.id = qv.questionbankentryid
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LEFT JOIN {question_categories} qc ON qc.id = qbe.questioncategoryid
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LEFT JOIN {context} ctx ON ctx.id = qc.contextid
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WHERE q.id = ?';
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$questiondata = $DB->get_record_sql($sql, [$question->id]);
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$questionstocheck = [$question->id];
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if ($question->parent) {
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$questionstocheck[] = $question->parent;
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}
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// Do not delete a question if it is used by an activity module. Just mark the version hidden.
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if (questions_in_use($questionstocheck)) {
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$DB->set_field('question_versions', 'status',
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question_version_status::QUESTION_STATUS_HIDDEN, ['questionid' => $questionid]);
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return;
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}
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// This sometimes happens in old sites with bad data.
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if (!$questiondata->contextid) {
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debugging('Deleting question ' . $question->id . ' which is no longer linked to a context. ' .
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'Assuming system context to avoid errors, but this may mean that some data like files, ' .
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'tags, are not cleaned up.');
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$questiondata->contextid = context_system::instance()->id;
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$questiondata->categoryid = 0;
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}
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// Delete previews of the question.
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$dm = new question_engine_data_mapper();
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$dm->delete_previews($question->id);
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// Delete questiontype-specific data.
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question_bank::get_qtype($question->qtype, false)->delete_question($question->id, $questiondata->contextid);
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// Delete all tag instances.
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core_tag_tag::remove_all_item_tags('core_question', 'question', $question->id);
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// Delete the custom filed data for the question.
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$customfieldhandler = qbank_customfields\customfield\question_handler::create();
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$customfieldhandler->delete_instance($question->id);
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// Now recursively delete all child questions
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if ($children = $DB->get_records('question',
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array('parent' => $questionid), '', 'id, qtype')) {
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foreach ($children as $child) {
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if ($child->id != $questionid) {
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question_delete_question($child->id);
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}
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}
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}
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// Delete question comments.
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$DB->delete_records('comments', ['itemid' => $questionid, 'component' => 'qbank_comment',
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'commentarea' => 'question']);
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// Finally delete the question record itself.
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$DB->delete_records('question', ['id' => $question->id]);
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$DB->delete_records('question_versions', ['id' => $questiondata->versionid]);
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$DB->delete_records('question_references',
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[
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'version' => $questiondata->version,
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'questionbankentryid' => $questiondata->entryid,
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]);
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delete_question_bank_entry($questiondata->entryid);
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question_bank::notify_question_edited($question->id);
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// Log the deletion of this question.
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$question->category = $questiondata->categoryid;
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$question->contextid = $questiondata->contextid;
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$event = \core\event\question_deleted::create_from_question_instance($question);
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$event->add_record_snapshot('question', $question);
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$event->trigger();
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}
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/**
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* All question categories and their questions are deleted for this context id.
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*
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* @param int $contextid The contextid to delete question categories from
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* @return array only returns an empty array for backwards compatibility.
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*/
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function question_delete_context($contextid): array {
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global $DB;
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$fields = 'id, parent, name, contextid';
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if ($categories = $DB->get_records('question_categories', ['contextid' => $contextid], 'parent', $fields)) {
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// Sort categories following their tree (parent-child) relationships this will make the feedback more readable.
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$categories = sort_categories_by_tree($categories);
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foreach ($categories as $category) {
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question_category_delete_safe($category);
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}
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}
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return [];
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}
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/**
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* All question categories and their questions are deleted for this course.
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*
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* @param stdClass $course an object representing the activity
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* @param bool $notused this argument is not used any more. Kept for backwards compatibility.
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* @return bool always true.
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*/
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function question_delete_course($course, $notused = false): bool {
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$coursecontext = context_course::instance($course->id);
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question_delete_context($coursecontext->id);
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return true;
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}
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/**
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* Category is about to be deleted,
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* 1/ All question categories and their questions are deleted for this course category.
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* 2/ All questions are moved to new category
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*
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* @param stdClass|core_course_category $category course category object
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* @param stdClass|core_course_category $newcategory empty means everything deleted, otherwise id of
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* category where content moved
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* @param bool $notused this argument is no longer used. Kept for backwards compatibility.
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* @return boolean
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*/
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function question_delete_course_category($category, $newcategory, $notused=false): bool {
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global $DB;
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$context = context_coursecat::instance($category->id);
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if (empty($newcategory)) {
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question_delete_context($context->id);
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} else {
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// Move question categories to the new context.
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if (!$newcontext = context_coursecat::instance($newcategory->id)) {
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return false;
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}
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// Only move question categories if there is any question category at all!
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if ($topcategory = question_get_top_category($context->id)) {
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$newtopcategory = question_get_top_category($newcontext->id, true);
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question_move_category_to_context($topcategory->id, $context->id, $newcontext->id);
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$DB->set_field('question_categories', 'parent', $newtopcategory->id, ['parent' => $topcategory->id]);
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// Now delete the top category.
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$DB->delete_records('question_categories', ['id' => $topcategory->id]);
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}
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}
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|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Creates a new category to save the questions in use.
|
|
*
|
|
* @param array $questionids of question ids
|
|
* @param object $newcontextid the context to create the saved category in.
|
|
* @param string $oldplace a textual description of the think being deleted,
|
|
* e.g. from get_context_name
|
|
* @param object $newcategory
|
|
* @return mixed false on
|
|
*/
|
|
function question_save_from_deletion($questionids, $newcontextid, $oldplace, $newcategory = null) {
|
|
global $DB;
|
|
|
|
// Make a category in the parent context to move the questions to.
|
|
if (is_null($newcategory)) {
|
|
$newcategory = new stdClass();
|
|
$newcategory->parent = question_get_top_category($newcontextid, true)->id;
|
|
$newcategory->contextid = $newcontextid;
|
|
// Max length of column name in question_categories is 255.
|
|
$newcategory->name = shorten_text(get_string('questionsrescuedfrom', 'question', $oldplace), 255);
|
|
$newcategory->info = get_string('questionsrescuedfrominfo', 'question', $oldplace);
|
|
$newcategory->sortorder = 999;
|
|
$newcategory->stamp = make_unique_id_code();
|
|
$newcategory->id = $DB->insert_record('question_categories', $newcategory);
|
|
}
|
|
|
|
// Move any remaining questions to the 'saved' category.
|
|
if (!question_move_questions_to_category($questionids, $newcategory->id)) {
|
|
return false;
|
|
}
|
|
return $newcategory;
|
|
}
|
|
|
|
/**
|
|
* All question categories and their questions are deleted for this activity.
|
|
*
|
|
* @param object $cm the course module object representing the activity
|
|
* @param bool $notused the argument is not used any more. Kept for backwards compatibility.
|
|
* @return boolean
|
|
*/
|
|
function question_delete_activity($cm, $notused = false): bool {
|
|
$modcontext = context_module::instance($cm->id);
|
|
question_delete_context($modcontext->id);
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* This function will handle moving all tag instances to a new context for a
|
|
* given list of questions.
|
|
*
|
|
* Questions can be tagged in up to two contexts:
|
|
* 1.) The context the question exists in.
|
|
* 2.) The course context (if the question context is a higher context.
|
|
* E.g. course category context or system context.
|
|
*
|
|
* This means a question that exists in a higher context (e.g. course cat or
|
|
* system context) may have multiple groups of tags in any number of child
|
|
* course contexts.
|
|
*
|
|
* Questions in the course category context can be move "down" a context level
|
|
* into one of their child course contexts or activity contexts which affects the
|
|
* availability of that question in other courses / activities.
|
|
*
|
|
* In this case it makes the questions no longer available in the other course or
|
|
* activity contexts so we need to make sure that the tag instances in those other
|
|
* contexts are removed.
|
|
*
|
|
* @param stdClass[] $questions The list of question being moved (must include
|
|
* the id and contextid)
|
|
* @param context $newcontext The Moodle context the questions are being moved to
|
|
*/
|
|
function question_move_question_tags_to_new_context(array $questions, context $newcontext): void {
|
|
// If the questions are moving to a new course/activity context then we need to
|
|
// find any existing tag instances from any unavailable course contexts and
|
|
// delete them because they will no longer be applicable (we don't support
|
|
// tagging questions across courses).
|
|
$instancestodelete = [];
|
|
$instancesfornewcontext = [];
|
|
$newcontextparentids = $newcontext->get_parent_context_ids();
|
|
$questionids = array_map(function($question) {
|
|
return $question->id;
|
|
}, $questions);
|
|
$questionstagobjects = core_tag_tag::get_items_tags('core_question', 'question', $questionids);
|
|
|
|
foreach ($questions as $question) {
|
|
$tagobjects = $questionstagobjects[$question->id] ?? [];
|
|
|
|
foreach ($tagobjects as $tagobject) {
|
|
$tagid = $tagobject->taginstanceid;
|
|
$tagcontextid = $tagobject->taginstancecontextid;
|
|
$istaginnewcontext = $tagcontextid == $newcontext->id;
|
|
$istaginquestioncontext = $tagcontextid == $question->contextid;
|
|
|
|
if ($istaginnewcontext) {
|
|
// This tag instance is already in the correct context so we can
|
|
// ignore it.
|
|
continue;
|
|
}
|
|
|
|
if ($istaginquestioncontext) {
|
|
// This tag instance is in the question context so it needs to be
|
|
// updated.
|
|
$instancesfornewcontext[] = $tagid;
|
|
continue;
|
|
}
|
|
|
|
// These tag instances are in neither the new context nor the
|
|
// question context so we need to determine what to do based on
|
|
// the context they are in and the new question context.
|
|
$tagcontext = context::instance_by_id($tagcontextid);
|
|
$tagcoursecontext = $tagcontext->get_course_context(false);
|
|
// The tag is in a course context if get_course_context() returns
|
|
// itself.
|
|
$istaginstancecontextcourse = !empty($tagcoursecontext)
|
|
&& $tagcontext->id == $tagcoursecontext->id;
|
|
|
|
if ($istaginstancecontextcourse) {
|
|
// If the tag instance is in a course context we need to add some
|
|
// special handling.
|
|
$tagcontextparentids = $tagcontext->get_parent_context_ids();
|
|
$isnewcontextaparent = in_array($newcontext->id, $tagcontextparentids);
|
|
$isnewcontextachild = in_array($tagcontext->id, $newcontextparentids);
|
|
|
|
if ($isnewcontextaparent) {
|
|
// If the tag instance is a course context tag and the new
|
|
// context is still a parent context to the tag context then
|
|
// we can leave this tag where it is.
|
|
continue;
|
|
} else if ($isnewcontextachild) {
|
|
// If the new context is a child context (e.g. activity) of this
|
|
// tag instance then we should move all of this tag instance
|
|
// down into the activity context along with the question.
|
|
$instancesfornewcontext[] = $tagid;
|
|
} else {
|
|
// If the tag is in a course context that is no longer a parent
|
|
// or child of the new context then this tag instance should be
|
|
// removed.
|
|
$instancestodelete[] = $tagid;
|
|
}
|
|
} else {
|
|
// This is a catch all for any tag instances not in the question
|
|
// context or a course context. These tag instances should be
|
|
// updated to the new context id. This will clean up old invalid
|
|
// data.
|
|
$instancesfornewcontext[] = $tagid;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!empty($instancestodelete)) {
|
|
// Delete any course context tags that may no longer be valid.
|
|
core_tag_tag::delete_instances_by_id($instancestodelete);
|
|
}
|
|
|
|
if (!empty($instancesfornewcontext)) {
|
|
// Update the tag instances to the new context id.
|
|
core_tag_tag::change_instances_context($instancesfornewcontext, $newcontext);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Check if an idnumber exist in the category.
|
|
*
|
|
* @param int $questionidnumber
|
|
* @param int $categoryid
|
|
* @param int $limitfrom
|
|
* @param int $limitnum
|
|
* @return array
|
|
*/
|
|
function idnumber_exist_in_question_category($questionidnumber, $categoryid, $limitfrom = 0, $limitnum = 1): array {
|
|
global $DB;
|
|
$response = false;
|
|
$record = [];
|
|
// Check if the idnumber exist in the category.
|
|
$sql = 'SELECT qbe.idnumber
|
|
FROM {question_bank_entries} qbe
|
|
WHERE qbe.idnumber LIKE ?
|
|
AND qbe.questioncategoryid = ?
|
|
ORDER BY qbe.idnumber DESC';
|
|
$questionrecord = $DB->record_exists_sql($sql, [$questionidnumber, $categoryid]);
|
|
if ((string) $questionidnumber !== '' && $questionrecord) {
|
|
$record = $DB->get_records_sql($sql, [$questionidnumber . '_%', $categoryid], 0, 1);
|
|
$response = true;
|
|
}
|
|
|
|
return [$response, $record];
|
|
}
|
|
|
|
/**
|
|
* This function should be considered private to the question bank, it is called from
|
|
* question/editlib.php question/contextmoveq.php and a few similar places to to the
|
|
* work of actually moving questions and associated data. However, callers of this
|
|
* function also have to do other work, which is why you should not call this method
|
|
* directly from outside the questionbank.
|
|
*
|
|
* @param array $questionids of question ids.
|
|
* @param integer $newcategoryid the id of the category to move to.
|
|
* @return bool
|
|
*/
|
|
function question_move_questions_to_category($questionids, $newcategoryid): bool {
|
|
global $DB;
|
|
|
|
$newcategorydata = $DB->get_record('question_categories', ['id' => $newcategoryid]);
|
|
if (!$newcategorydata) {
|
|
return false;
|
|
}
|
|
list($questionidcondition, $params) = $DB->get_in_or_equal($questionids);
|
|
|
|
$sql = "SELECT qv.id as versionid,
|
|
qbe.id as entryid,
|
|
qc.id as category,
|
|
qc.contextid as contextid,
|
|
q.id,
|
|
q.qtype,
|
|
qbe.idnumber
|
|
FROM {question} q
|
|
JOIN {question_versions} qv ON qv.questionid = q.id
|
|
JOIN {question_bank_entries} qbe ON qbe.id = qv.questionbankentryid
|
|
JOIN {question_categories} qc ON qc.id = qbe.questioncategoryid
|
|
WHERE q.id $questionidcondition
|
|
OR (q.parent <> 0 AND q.parent $questionidcondition)";
|
|
|
|
// Also, we need to move children questions.
|
|
$params = array_merge($params, $params);
|
|
$questions = $DB->get_records_sql($sql, $params);
|
|
foreach ($questions as $question) {
|
|
if ($newcategorydata->contextid != $question->contextid) {
|
|
question_bank::get_qtype($question->qtype)->move_files(
|
|
$question->id, $question->contextid, $newcategorydata->contextid);
|
|
}
|
|
// Check whether there could be a clash of idnumbers in the new category.
|
|
list($idnumberclash, $rec) = idnumber_exist_in_question_category($question->idnumber, $newcategoryid);
|
|
if ($idnumberclash) {
|
|
$unique = 1;
|
|
if (count($rec)) {
|
|
$rec = reset($rec);
|
|
$idnumber = $rec->idnumber;
|
|
if (strpos($idnumber, '_') !== false) {
|
|
$unique = substr($idnumber, strpos($idnumber, '_') + 1) + 1;
|
|
}
|
|
}
|
|
// For the move process, add a numerical increment to the idnumber. This means that if a question is
|
|
// mistakenly moved then the idnumber will not be completely lost.
|
|
$qbankentry = new stdClass();
|
|
$qbankentry->id = $question->entryid;
|
|
$qbankentry->idnumber = $question->idnumber . '_' . $unique;
|
|
$DB->update_record('question_bank_entries', $qbankentry);
|
|
}
|
|
|
|
// Update the entry to the new category id.
|
|
$entry = new stdClass();
|
|
$entry->id = $question->entryid;
|
|
$entry->questioncategoryid = $newcategorydata->id;
|
|
$DB->update_record('question_bank_entries', $entry);
|
|
|
|
// Log this question move.
|
|
$event = \core\event\question_moved::create_from_question_instance($question, context::instance_by_id($question->contextid),
|
|
['oldcategoryid' => $question->category, 'newcategoryid' => $newcategorydata->id]);
|
|
$event->trigger();
|
|
}
|
|
|
|
$newcontext = context::instance_by_id($newcategorydata->contextid);
|
|
question_move_question_tags_to_new_context($questions, $newcontext);
|
|
|
|
// TODO Deal with datasets.
|
|
|
|
// Purge these questions from the cache.
|
|
foreach ($questions as $question) {
|
|
question_bank::notify_question_edited($question->id);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Update the questioncontextid field for all question_set_references records given a new context id
|
|
*
|
|
* @param int $oldcategoryid Old category to be moved.
|
|
* @param int $newcatgoryid New category that will receive the questions.
|
|
* @param int $oldcontextid Old context to be moved.
|
|
* @param int $newcontextid New context that will receive the questions.
|
|
* @param bool $delete If the action is delete.
|
|
* @throws dml_exception
|
|
*/
|
|
function move_question_set_references(int $oldcategoryid, int $newcatgoryid,
|
|
int $oldcontextid, int $newcontextid, bool $delete = false): void {
|
|
global $DB;
|
|
|
|
if ($delete || $oldcontextid !== $newcontextid) {
|
|
$setreferences = $DB->get_recordset('question_set_references', ['questionscontextid' => $oldcontextid]);
|
|
foreach ($setreferences as $setreference) {
|
|
$filter = json_decode($setreference->filtercondition);
|
|
if (isset($filter->questioncategoryid)) {
|
|
if ((int)$filter->questioncategoryid === $oldcategoryid) {
|
|
$setreference->questionscontextid = $newcontextid;
|
|
if ($oldcategoryid !== $newcatgoryid) {
|
|
$filter->questioncategoryid = $newcatgoryid;
|
|
$setreference->filtercondition = json_encode($filter);
|
|
}
|
|
$DB->update_record('question_set_references', $setreference);
|
|
}
|
|
}
|
|
}
|
|
$setreferences->close();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This function helps move a question cateogry to a new context by moving all
|
|
* the files belonging to all the questions to the new context.
|
|
* Also moves subcategories.
|
|
* @param integer $categoryid the id of the category being moved.
|
|
* @param integer $oldcontextid the old context id.
|
|
* @param integer $newcontextid the new context id.
|
|
*/
|
|
function question_move_category_to_context($categoryid, $oldcontextid, $newcontextid): void {
|
|
global $DB;
|
|
|
|
$questions = [];
|
|
$sql = "SELECT q.id, q.qtype
|
|
FROM {question} q
|
|
JOIN {question_versions} qv ON qv.questionid = q.id
|
|
JOIN {question_bank_entries} qbe ON qbe.id = qv.questionbankentryid
|
|
WHERE qbe.questioncategoryid = ?";
|
|
|
|
$questionids = $DB->get_records_sql_menu($sql, [$categoryid]);
|
|
foreach ($questionids as $questionid => $qtype) {
|
|
question_bank::get_qtype($qtype)->move_files($questionid, $oldcontextid, $newcontextid);
|
|
// Purge this question from the cache.
|
|
question_bank::notify_question_edited($questionid);
|
|
|
|
$questions[] = (object) [
|
|
'id' => $questionid,
|
|
'contextid' => $oldcontextid
|
|
];
|
|
}
|
|
|
|
$newcontext = context::instance_by_id($newcontextid);
|
|
question_move_question_tags_to_new_context($questions, $newcontext);
|
|
|
|
$subcatids = $DB->get_records_menu('question_categories', ['parent' => $categoryid], '', 'id,1');
|
|
foreach ($subcatids as $subcatid => $notused) {
|
|
$DB->set_field('question_categories', 'contextid', $newcontextid, ['id' => $subcatid]);
|
|
question_move_category_to_context($subcatid, $oldcontextid, $newcontextid);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Given a list of ids, load the basic information about a set of questions from
|
|
* the questions table. The $join and $extrafields arguments can be used together
|
|
* to pull in extra data. See, for example, the usage in mod/quiz/attemptlib.php, and
|
|
* read the code below to see how the SQL is assembled. Throws exceptions on error.
|
|
*
|
|
* @param array $questionids array of question ids to load. If null, then all
|
|
* questions matched by $join will be loaded.
|
|
* @param string $extrafields extra SQL code to be added to the query.
|
|
* @param string $join extra SQL code to be added to the query.
|
|
* @param array $extraparams values for any placeholders in $join.
|
|
* You must use named placeholders.
|
|
* @param string $orderby what to order the results by. Optional, default is unspecified order.
|
|
*
|
|
* @return array partially complete question objects. You need to call get_question_options
|
|
* on them before they can be properly used.
|
|
*/
|
|
function question_preload_questions($questionids = null, $extrafields = '', $join = '', $extraparams = [], $orderby = ''): array {
|
|
global $DB;
|
|
|
|
if ($questionids === null) {
|
|
$extracondition = '';
|
|
$params = [];
|
|
} else {
|
|
if (empty($questionids)) {
|
|
return [];
|
|
}
|
|
|
|
list($questionidcondition, $params) = $DB->get_in_or_equal($questionids, SQL_PARAMS_NAMED, 'qid0000');
|
|
$extracondition = 'WHERE q.id ' . $questionidcondition;
|
|
}
|
|
|
|
if ($join) {
|
|
$join = 'JOIN ' . $join;
|
|
}
|
|
|
|
if ($extrafields) {
|
|
$extrafields = ', ' . $extrafields;
|
|
}
|
|
|
|
if ($orderby) {
|
|
$orderby = 'ORDER BY ' . $orderby;
|
|
}
|
|
|
|
$sql = "SELECT q.*,
|
|
qc.id as category,
|
|
qv.status,
|
|
qv.id as versionid,
|
|
qv.version,
|
|
qv.questionbankentryid,
|
|
qc.contextid as contextid
|
|
{$extrafields}
|
|
FROM {question} q
|
|
JOIN {question_versions} qv
|
|
ON qv.questionid = q.id
|
|
JOIN {question_bank_entries} qbe
|
|
ON qbe.id = qv.questionbankentryid
|
|
JOIN {question_categories} qc
|
|
ON qc.id = qbe.questioncategoryid
|
|
{$join}
|
|
{$extracondition}
|
|
{$orderby}";
|
|
|
|
// Load the questions.
|
|
$questions = $DB->get_records_sql($sql, $extraparams + $params);
|
|
foreach ($questions as $question) {
|
|
$question->_partiallyloaded = true;
|
|
}
|
|
|
|
return $questions;
|
|
}
|
|
|
|
/**
|
|
* Load a set of questions, given a list of ids. The $join and $extrafields arguments can be used
|
|
* together to pull in extra data. See, for example, the usage in mod/quiz/attempt.php, and
|
|
* read the code below to see how the SQL is assembled. Throws exceptions on error.
|
|
*
|
|
* @param array $questionids array of question ids.
|
|
* @param string $extrafields extra SQL code to be added to the query.
|
|
* @param string $join extra SQL code to be added to the query.
|
|
* @return array|string question objects.
|
|
*/
|
|
function question_load_questions($questionids, $extrafields = '', $join = '') {
|
|
$questions = question_preload_questions($questionids, $extrafields, $join);
|
|
|
|
// Load the question type specific information.
|
|
if (!get_question_options($questions)) {
|
|
return get_string('questionloaderror', 'question');
|
|
}
|
|
|
|
return $questions;
|
|
}
|
|
|
|
/**
|
|
* Private function to factor common code out of get_question_options().
|
|
*
|
|
* @param object $question the question to tidy.
|
|
* @param stdClass $category The question_categories record for the given $question.
|
|
* @param stdClass[]|null $tagobjects The tags for the given $question.
|
|
* @param stdClass[]|null $filtercourses The courses to filter the course tags by.
|
|
*/
|
|
function _tidy_question($question, $category, array $tagobjects = null, array $filtercourses = null): void {
|
|
// Convert numeric fields to float. This prevents these being displayed as 1.0000000.
|
|
$question->defaultmark += 0;
|
|
$question->penalty += 0;
|
|
|
|
// Indicate the question is now fully initialised.
|
|
if (isset($question->_partiallyloaded)) {
|
|
unset($question->_partiallyloaded);
|
|
}
|
|
|
|
$question->categoryobject = $category;
|
|
|
|
// Add any tags we have been passed.
|
|
if (!is_null($tagobjects)) {
|
|
$categorycontext = context::instance_by_id($category->contextid);
|
|
$sortedtagobjects = question_sort_tags($tagobjects, $categorycontext, $filtercourses);
|
|
$question->coursetagobjects = $sortedtagobjects->coursetagobjects;
|
|
$question->coursetags = $sortedtagobjects->coursetags;
|
|
$question->tagobjects = $sortedtagobjects->tagobjects;
|
|
$question->tags = $sortedtagobjects->tags;
|
|
}
|
|
|
|
// Load question-type specific fields.
|
|
if (question_bank::is_qtype_installed($question->qtype)) {
|
|
question_bank::get_qtype($question->qtype)->get_question_options($question);
|
|
} else {
|
|
$question->questiontext = html_writer::tag('p', get_string('warningmissingtype',
|
|
'qtype_missingtype')) . $question->questiontext;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Updates the question objects with question type specific
|
|
* information by calling {@see get_question_options()}
|
|
*
|
|
* Can be called either with an array of question objects or with a single
|
|
* question object.
|
|
*
|
|
* @param mixed $questions Either an array of question objects to be updated
|
|
* or just a single question object
|
|
* @param bool $loadtags load the question tags from the tags table. Optional, default false.
|
|
* @param stdClass[] $filtercourses The courses to filter the course tags by.
|
|
* @return bool Indicates success or failure.
|
|
*/
|
|
function get_question_options(&$questions, $loadtags = false, $filtercourses = null) {
|
|
global $DB;
|
|
|
|
$questionlist = is_array($questions) ? $questions : [$questions];
|
|
$categoryids = [];
|
|
$questionids = [];
|
|
|
|
if (empty($questionlist)) {
|
|
return true;
|
|
}
|
|
|
|
foreach ($questionlist as $question) {
|
|
$questionids[] = $question->id;
|
|
if (isset($question->category)) {
|
|
$qcategoryid = $question->category;
|
|
} else {
|
|
$qcategoryid = get_question_bank_entry($question->id)->questioncategoryid;
|
|
$question->questioncategoryid = $qcategoryid;
|
|
}
|
|
|
|
if (!in_array($qcategoryid, $categoryids)) {
|
|
$categoryids[] = $qcategoryid;
|
|
}
|
|
}
|
|
|
|
$categories = $DB->get_records_list('question_categories', 'id', $categoryids);
|
|
|
|
if ($loadtags && core_tag_tag::is_enabled('core_question', 'question')) {
|
|
$tagobjectsbyquestion = core_tag_tag::get_items_tags('core_question', 'question', $questionids);
|
|
} else {
|
|
$tagobjectsbyquestion = null;
|
|
}
|
|
|
|
foreach ($questionlist as $question) {
|
|
if (is_null($tagobjectsbyquestion)) {
|
|
$tagobjects = null;
|
|
} else {
|
|
$tagobjects = $tagobjectsbyquestion[$question->id];
|
|
}
|
|
$qcategoryid = $question->category ?? $question->questioncategoryid ??
|
|
get_question_bank_entry($question->id)->questioncategoryid;
|
|
|
|
_tidy_question($question, $categories[$qcategoryid], $tagobjects, $filtercourses);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Sort question tags by course or normal tags.
|
|
*
|
|
* This function also search tag instances that may have a context id that don't match either a course or
|
|
* question context and fix the data setting the correct context id.
|
|
*
|
|
* @param stdClass[] $tagobjects The tags for the given $question.
|
|
* @param stdClass $categorycontext The question categories context.
|
|
* @param stdClass[]|null $filtercourses The courses to filter the course tags by.
|
|
* @return stdClass $sortedtagobjects Sorted tag objects.
|
|
*/
|
|
function question_sort_tags($tagobjects, $categorycontext, $filtercourses = null): stdClass {
|
|
|
|
// Questions can have two sets of tag instances. One set at the
|
|
// course context level and another at the context the question
|
|
// belongs to (e.g. course category, system etc).
|
|
$sortedtagobjects = new stdClass();
|
|
$sortedtagobjects->coursetagobjects = [];
|
|
$sortedtagobjects->coursetags = [];
|
|
$sortedtagobjects->tagobjects = [];
|
|
$sortedtagobjects->tags = [];
|
|
$taginstanceidstonormalise = [];
|
|
$filtercoursecontextids = [];
|
|
$hasfiltercourses = !empty($filtercourses);
|
|
|
|
if ($hasfiltercourses) {
|
|
// If we're being asked to filter the course tags by a set of courses
|
|
// then get the context ids to filter below.
|
|
$filtercoursecontextids = array_map(function($course) {
|
|
$coursecontext = context_course::instance($course->id);
|
|
return $coursecontext->id;
|
|
}, $filtercourses);
|
|
}
|
|
|
|
foreach ($tagobjects as $tagobject) {
|
|
$tagcontextid = $tagobject->taginstancecontextid;
|
|
$tagcontext = context::instance_by_id($tagcontextid);
|
|
$tagcoursecontext = $tagcontext->get_course_context(false);
|
|
// This is a course tag if the tag context is a course context which
|
|
// doesn't match the question's context. Any tag in the question context
|
|
// is not considered a course tag, it belongs to the question.
|
|
$iscoursetag = $tagcoursecontext
|
|
&& $tagcontext->id == $tagcoursecontext->id
|
|
&& $tagcontext->id != $categorycontext->id;
|
|
|
|
if ($iscoursetag) {
|
|
// Any tag instance in a course context level is considered a course tag.
|
|
if (!$hasfiltercourses || in_array($tagcontextid, $filtercoursecontextids)) {
|
|
// Add the tag to the list of course tags if we aren't being
|
|
// asked to filter or if this tag is in the list of courses
|
|
// we're being asked to filter by.
|
|
$sortedtagobjects->coursetagobjects[] = $tagobject;
|
|
$sortedtagobjects->coursetags[$tagobject->id] = $tagobject->get_display_name();
|
|
}
|
|
} else {
|
|
// All non course context level tag instances or tags in the question
|
|
// context belong to the context that the question was created in.
|
|
$sortedtagobjects->tagobjects[] = $tagobject;
|
|
$sortedtagobjects->tags[$tagobject->id] = $tagobject->get_display_name();
|
|
|
|
// Due to legacy tag implementations that don't force the recording
|
|
// of a context id, some tag instances may have context ids that don't
|
|
// match either a course context or the question context. In this case
|
|
// we should take the opportunity to fix up the data and set the correct
|
|
// context id.
|
|
if ($tagcontext->id != $categorycontext->id) {
|
|
$taginstanceidstonormalise[] = $tagobject->taginstanceid;
|
|
// Update the object properties to reflect the DB update that will
|
|
// happen below.
|
|
$tagobject->taginstancecontextid = $categorycontext->id;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!empty($taginstanceidstonormalise)) {
|
|
// If we found any tag instances with incorrect context id data then we can
|
|
// correct those values now by setting them to the question context id.
|
|
core_tag_tag::change_instances_context($taginstanceidstonormalise, $categorycontext);
|
|
}
|
|
|
|
return $sortedtagobjects;
|
|
}
|
|
|
|
/**
|
|
* Print the icon for the question type
|
|
*
|
|
* @param object $question The question object for which the icon is required.
|
|
* Only $question->qtype is used.
|
|
* @return string the HTML for the img tag.
|
|
*/
|
|
function print_question_icon($question): string {
|
|
global $PAGE;
|
|
|
|
if (gettype($question->qtype) == 'object') {
|
|
$qtype = $question->qtype->name();
|
|
} else {
|
|
// Assume string.
|
|
$qtype = $question->qtype;
|
|
}
|
|
|
|
return $PAGE->get_renderer('question', 'bank')->qtype_icon($qtype);
|
|
}
|
|
|
|
// CATEGORY FUNCTIONS.
|
|
|
|
/**
|
|
* Returns the categories with their names ordered following parent-child relationships.
|
|
* finally it tries to return pending categories (those being orphaned, whose parent is
|
|
* incorrect) to avoid missing any category from original array.
|
|
*
|
|
* @param array $categories
|
|
* @param int $id
|
|
* @param int $level
|
|
* @return array
|
|
*/
|
|
function sort_categories_by_tree(&$categories, $id = 0, $level = 1): array {
|
|
global $DB;
|
|
|
|
$children = [];
|
|
$keys = array_keys($categories);
|
|
|
|
foreach ($keys as $key) {
|
|
if (!isset($categories[$key]->processed) && $categories[$key]->parent == $id) {
|
|
$children[$key] = $categories[$key];
|
|
$categories[$key]->processed = true;
|
|
$children = $children + sort_categories_by_tree(
|
|
$categories, $children[$key]->id, $level + 1);
|
|
}
|
|
}
|
|
// If level = 1, we have finished, try to look for non processed categories (bad parent) and sort them too.
|
|
if ($level == 1) {
|
|
foreach ($keys as $key) {
|
|
// If not processed and it's a good candidate to start (because its parent doesn't exist in the course).
|
|
if (!isset($categories[$key]->processed) && !$DB->record_exists('question_categories',
|
|
array('contextid' => $categories[$key]->contextid,
|
|
'id' => $categories[$key]->parent))) {
|
|
$children[$key] = $categories[$key];
|
|
$categories[$key]->processed = true;
|
|
$children = $children + sort_categories_by_tree(
|
|
$categories, $children[$key]->id, $level + 1);
|
|
}
|
|
}
|
|
}
|
|
return $children;
|
|
}
|
|
|
|
/**
|
|
* Get the default category for the context.
|
|
*
|
|
* @param integer $contextid a context id.
|
|
* @return object|bool the default question category for that context, or false if none.
|
|
*/
|
|
function question_get_default_category($contextid) {
|
|
global $DB;
|
|
$category = $DB->get_records_select('question_categories', 'contextid = ? AND parent <> 0',
|
|
[$contextid], 'id', '*', 0, 1);
|
|
if (!empty($category)) {
|
|
return reset($category);
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Gets the top category in the given context.
|
|
* This function can optionally create the top category if it doesn't exist.
|
|
*
|
|
* @param int $contextid A context id.
|
|
* @param bool $create Whether create a top category if it doesn't exist.
|
|
* @return bool|stdClass The top question category for that context, or false if none.
|
|
*/
|
|
function question_get_top_category($contextid, $create = false) {
|
|
global $DB;
|
|
$category = $DB->get_record('question_categories', ['contextid' => $contextid, 'parent' => 0]);
|
|
|
|
if (!$category && $create) {
|
|
// We need to make one.
|
|
$category = new stdClass();
|
|
$category->name = 'top'; // A non-real name for the top category. It will be localised at the display time.
|
|
$category->info = '';
|
|
$category->contextid = $contextid;
|
|
$category->parent = 0;
|
|
$category->sortorder = 0;
|
|
$category->stamp = make_unique_id_code();
|
|
$category->id = $DB->insert_record('question_categories', $category);
|
|
}
|
|
|
|
return $category;
|
|
}
|
|
|
|
/**
|
|
* Gets the list of top categories in the given contexts in the array("categoryid,categorycontextid") format.
|
|
*
|
|
* @param array $contextids List of context ids
|
|
* @return array
|
|
*/
|
|
function question_get_top_categories_for_contexts($contextids): array {
|
|
global $DB;
|
|
|
|
$concatsql = $DB->sql_concat_join("','", ['id', 'contextid']);
|
|
list($insql, $params) = $DB->get_in_or_equal($contextids);
|
|
$sql = "SELECT $concatsql
|
|
FROM {question_categories}
|
|
WHERE contextid $insql
|
|
AND parent = 0";
|
|
|
|
$topcategories = $DB->get_fieldset_sql($sql, $params);
|
|
|
|
return $topcategories;
|
|
}
|
|
|
|
/**
|
|
* Gets the default category in the most specific context.
|
|
* If no categories exist yet then default ones are created in all contexts.
|
|
*
|
|
* @param array $contexts The context objects for this context and all parent contexts.
|
|
* @return object The default category - the category in the course context
|
|
*/
|
|
function question_make_default_categories($contexts): object {
|
|
global $DB;
|
|
static $preferredlevels = array(
|
|
CONTEXT_COURSE => 4,
|
|
CONTEXT_MODULE => 3,
|
|
CONTEXT_COURSECAT => 2,
|
|
CONTEXT_SYSTEM => 1,
|
|
);
|
|
|
|
$toreturn = null;
|
|
$preferredness = 0;
|
|
// If it already exists, just return it.
|
|
foreach ($contexts as $key => $context) {
|
|
$topcategory = question_get_top_category($context->id, true);
|
|
if (!$exists = $DB->record_exists("question_categories",
|
|
array('contextid' => $context->id, 'parent' => $topcategory->id))) {
|
|
// Otherwise, we need to make one.
|
|
$category = new stdClass();
|
|
$contextname = $context->get_context_name(false, true);
|
|
// Max length of name field is 255.
|
|
$category->name = shorten_text(get_string('defaultfor', 'question', $contextname), 255);
|
|
$category->info = get_string('defaultinfofor', 'question', $contextname);
|
|
$category->contextid = $context->id;
|
|
$category->parent = $topcategory->id;
|
|
// By default, all categories get this number, and are sorted alphabetically.
|
|
$category->sortorder = 999;
|
|
$category->stamp = make_unique_id_code();
|
|
$category->id = $DB->insert_record('question_categories', $category);
|
|
} else {
|
|
$category = question_get_default_category($context->id);
|
|
}
|
|
$thispreferredness = $preferredlevels[$context->contextlevel];
|
|
if (has_any_capability(array('moodle/question:usemine', 'moodle/question:useall'), $context)) {
|
|
$thispreferredness += 10;
|
|
}
|
|
if ($thispreferredness > $preferredness) {
|
|
$toreturn = $category;
|
|
$preferredness = $thispreferredness;
|
|
}
|
|
}
|
|
|
|
if (!is_null($toreturn)) {
|
|
$toreturn = clone($toreturn);
|
|
}
|
|
return $toreturn;
|
|
}
|
|
|
|
/**
|
|
* Get the list of categories.
|
|
*
|
|
* @param int $categoryid
|
|
* @return array of question category ids of the category and all subcategories.
|
|
*/
|
|
function question_categorylist($categoryid): array {
|
|
global $DB;
|
|
|
|
// Final list of category IDs.
|
|
$categorylist = array();
|
|
|
|
// A list of category IDs to check for any sub-categories.
|
|
$subcategories = array($categoryid);
|
|
|
|
while ($subcategories) {
|
|
foreach ($subcategories as $subcategory) {
|
|
// If anything from the temporary list was added already, then we have a loop.
|
|
if (isset($categorylist[$subcategory])) {
|
|
throw new coding_exception("Category id=$subcategory is already on the list - loop of categories detected.");
|
|
}
|
|
$categorylist[$subcategory] = $subcategory;
|
|
}
|
|
|
|
list ($in, $params) = $DB->get_in_or_equal($subcategories);
|
|
|
|
$subcategories = $DB->get_records_select_menu('question_categories', "parent $in", $params,
|
|
null, 'id,id AS id2');
|
|
}
|
|
|
|
return $categorylist;
|
|
}
|
|
|
|
/**
|
|
* Get all parent categories of a given question category in decending order.
|
|
* @param int $categoryid for which you want to find the parents.
|
|
* @return array of question category ids of all parents categories.
|
|
*/
|
|
function question_categorylist_parents(int $categoryid): array {
|
|
global $DB;
|
|
$parent = $DB->get_field('question_categories', 'parent', array('id' => $categoryid));
|
|
if (!$parent) {
|
|
return [];
|
|
}
|
|
$categorylist = [$parent];
|
|
$currentid = $parent;
|
|
while ($currentid) {
|
|
$currentid = $DB->get_field('question_categories', 'parent', array('id' => $currentid));
|
|
if ($currentid) {
|
|
$categorylist[] = $currentid;
|
|
}
|
|
}
|
|
// Present the list in decending order (the top category at the top).
|
|
$categorylist = array_reverse($categorylist);
|
|
return $categorylist;
|
|
}
|
|
|
|
// Import/Export Functions.
|
|
|
|
/**
|
|
* Get list of available import or export formats
|
|
* @param string $type 'import' if import list, otherwise export list assumed
|
|
* @return array sorted list of import/export formats available
|
|
*/
|
|
function get_import_export_formats($type): array {
|
|
global $CFG;
|
|
require_once($CFG->dirroot . '/question/format.php');
|
|
|
|
$formatclasses = core_component::get_plugin_list_with_class('qformat', '', 'format.php');
|
|
|
|
$fileformatname = array();
|
|
foreach ($formatclasses as $component => $formatclass) {
|
|
|
|
$format = new $formatclass();
|
|
if ($type == 'import') {
|
|
$provided = $format->provide_import();
|
|
} else {
|
|
$provided = $format->provide_export();
|
|
}
|
|
|
|
if ($provided) {
|
|
list($notused, $fileformat) = explode('_', $component, 2);
|
|
$fileformatnames[$fileformat] = get_string('pluginname', $component);
|
|
}
|
|
}
|
|
|
|
core_collator::asort($fileformatnames);
|
|
return $fileformatnames;
|
|
}
|
|
|
|
|
|
/**
|
|
* Create a reasonable default file name for exporting questions from a particular
|
|
* category.
|
|
* @param object $course the course the questions are in.
|
|
* @param object $category the question category.
|
|
* @return string the filename.
|
|
*/
|
|
function question_default_export_filename($course, $category): string {
|
|
// We build a string that is an appropriate name (questions) from the lang pack,
|
|
// then the corse shortname, then the question category name, then a timestamp.
|
|
|
|
$base = clean_filename(get_string('exportfilename', 'question'));
|
|
|
|
$dateformat = str_replace(' ', '_', get_string('exportnameformat', 'question'));
|
|
$timestamp = clean_filename(userdate(time(), $dateformat, 99, false));
|
|
|
|
$shortname = clean_filename($course->shortname);
|
|
if ($shortname == '' || $shortname == '_' ) {
|
|
$shortname = $course->id;
|
|
}
|
|
|
|
$categoryname = clean_filename(format_string($category->name));
|
|
|
|
return "{$base}-{$shortname}-{$categoryname}-{$timestamp}";
|
|
}
|
|
|
|
/**
|
|
* Check capability on category.
|
|
*
|
|
* @param int|stdClass|question_definition $questionorid object or id.
|
|
* If an object is passed, it should include ->contextid and ->createdby.
|
|
* @param string $cap 'add', 'edit', 'view', 'use', 'move' or 'tag'.
|
|
* @param int $notused no longer used.
|
|
* @return bool this user has the capability $cap for this question $question?
|
|
*/
|
|
function question_has_capability_on($questionorid, $cap, $notused = -1): bool {
|
|
global $USER, $DB;
|
|
|
|
if (is_numeric($questionorid)) {
|
|
$questionid = (int)$questionorid;
|
|
} else if (is_object($questionorid)) {
|
|
// All we really need in this function is the contextid and author of the question.
|
|
// We won't bother fetching other details of the question if these 2 fields are provided.
|
|
if (isset($questionorid->contextid) && isset($questionorid->createdby)) {
|
|
$question = $questionorid;
|
|
} else if (!empty($questionorid->id)) {
|
|
$questionid = $questionorid->id;
|
|
}
|
|
}
|
|
|
|
// At this point, either $question or $questionid is expected to be set.
|
|
if (isset($questionid)) {
|
|
try {
|
|
$question = question_bank::load_question_data($questionid);
|
|
} catch (Exception $e) {
|
|
// Let's log the exception for future debugging,
|
|
// but not during Behat, or we can't test these cases.
|
|
if (!defined('BEHAT_SITE_RUNNING')) {
|
|
debugging($e->getMessage(), DEBUG_NORMAL, $e->getTrace());
|
|
}
|
|
|
|
$sql = 'SELECT q.id,
|
|
q.createdby,
|
|
qc.contextid
|
|
FROM {question} q
|
|
JOIN {question_versions} qv
|
|
ON qv.questionid = q.id
|
|
JOIN {question_bank_entries} qbe
|
|
ON qbe.id = qv.questionbankentryid
|
|
JOIN {question_categories} qc
|
|
ON qc.id = qbe.questioncategoryid
|
|
WHERE q.id = :id';
|
|
|
|
// Well, at least we tried. Seems that we really have to read from DB.
|
|
$question = $DB->get_record_sql($sql, ['id' => $questionid]);
|
|
}
|
|
}
|
|
|
|
if (!isset($question)) {
|
|
throw new coding_exception('$questionorid parameter needs to be an integer or an object.');
|
|
}
|
|
|
|
$context = context::instance_by_id($question->contextid);
|
|
|
|
// These are existing questions capabilities that are set per category.
|
|
// Each of these has a 'mine' and 'all' version that is appended to the capability name.
|
|
$capabilitieswithallandmine = ['edit' => 1, 'view' => 1, 'use' => 1, 'move' => 1, 'tag' => 1, 'comment' => 1];
|
|
|
|
if (!isset($capabilitieswithallandmine[$cap])) {
|
|
return has_capability('moodle/question:' . $cap, $context);
|
|
} else {
|
|
return has_capability('moodle/question:' . $cap . 'all', $context) ||
|
|
($question->createdby == $USER->id && has_capability('moodle/question:' . $cap . 'mine', $context));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Require capability on question.
|
|
*
|
|
* @param int|stdClass|question_definition $question object or id.
|
|
* If an object is passed, it should include ->contextid and ->createdby.
|
|
* @param string $cap 'add', 'edit', 'view', 'use', 'move' or 'tag'.
|
|
* @return bool true if the user has the capability. Throws exception if not.
|
|
*/
|
|
function question_require_capability_on($question, $cap): bool {
|
|
if (!question_has_capability_on($question, $cap)) {
|
|
throw new moodle_exception('nopermissions', '', '', $cap);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Gets the question edit url.
|
|
*
|
|
* @param object $context a context
|
|
* @return string|bool A URL for editing questions in this context.
|
|
*/
|
|
function question_edit_url($context) {
|
|
global $CFG, $SITE;
|
|
if (!has_any_capability(question_get_question_capabilities(), $context)) {
|
|
return false;
|
|
}
|
|
$baseurl = $CFG->wwwroot . '/question/edit.php?';
|
|
$defaultcategory = question_get_default_category($context->id);
|
|
if ($defaultcategory) {
|
|
$baseurl .= 'cat=' . $defaultcategory->id . ',' . $context->id . '&';
|
|
}
|
|
switch ($context->contextlevel) {
|
|
case CONTEXT_SYSTEM:
|
|
return $baseurl . 'courseid=' . $SITE->id;
|
|
case CONTEXT_COURSECAT:
|
|
// This is nasty, becuase we can only edit questions in a course
|
|
// context at the moment, so for now we just return false.
|
|
return false;
|
|
case CONTEXT_COURSE:
|
|
return $baseurl . 'courseid=' . $context->instanceid;
|
|
case CONTEXT_MODULE:
|
|
return $baseurl . 'cmid=' . $context->instanceid;
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Adds question bank setting links to the given navigation node if caps are met
|
|
* and loads the navigation from the plugins.
|
|
* Qbank plugins can extend the navigation_plugin_base and add their own navigation node,
|
|
* this method will help to autoload those nodes in the question bank navigation.
|
|
*
|
|
* @param navigation_node $navigationnode The navigation node to add the question branch to
|
|
* @param object $context
|
|
* @param string $baseurl the url of the base where the api is implemented from
|
|
* @return navigation_node Returns the question branch that was added
|
|
*/
|
|
function question_extend_settings_navigation(navigation_node $navigationnode, $context, $baseurl = '/question/edit.php') {
|
|
global $PAGE;
|
|
|
|
if ($context->contextlevel == CONTEXT_COURSE) {
|
|
$params = ['courseid' => $context->instanceid];
|
|
} else if ($context->contextlevel == CONTEXT_MODULE) {
|
|
$params = ['cmid' => $context->instanceid];
|
|
} else {
|
|
return;
|
|
}
|
|
|
|
if (($cat = $PAGE->url->param('cat')) && preg_match('~\d+,\d+~', $cat)) {
|
|
$params['cat'] = $cat;
|
|
}
|
|
|
|
$questionnode = $navigationnode->add(get_string('questionbank', 'question'),
|
|
new moodle_url($baseurl, $params), navigation_node::TYPE_CONTAINER, null, 'questionbank');
|
|
|
|
$corenavigations = [
|
|
'questions' => [
|
|
'title' => get_string('questions', 'question'),
|
|
'url' => new moodle_url($baseurl)
|
|
],
|
|
'categories' => [],
|
|
'import' => [],
|
|
'export' => []
|
|
];
|
|
|
|
$plugins = \core_component::get_plugin_list_with_class('qbank', 'plugin_feature', 'plugin_feature.php');
|
|
foreach ($plugins as $componentname => $plugin) {
|
|
$pluginentrypoint = new $plugin();
|
|
$pluginentrypointobject = $pluginentrypoint->get_navigation_node();
|
|
// Don't need the plugins without navigation node.
|
|
if ($pluginentrypointobject === null) {
|
|
unset($plugins[$componentname]);
|
|
continue;
|
|
}
|
|
foreach ($corenavigations as $key => $corenavigation) {
|
|
if ($pluginentrypointobject->get_navigation_key() === $key) {
|
|
unset($plugins[$componentname]);
|
|
if (!\core\plugininfo\qbank::is_plugin_enabled($componentname)) {
|
|
unset($corenavigations[$key]);
|
|
break;
|
|
}
|
|
$corenavigations[$key] = [
|
|
'title' => $pluginentrypointobject->get_navigation_title(),
|
|
'url' => $pluginentrypointobject->get_navigation_url()
|
|
];
|
|
}
|
|
}
|
|
}
|
|
|
|
// Mitigate the risk of regression.
|
|
foreach ($corenavigations as $node => $corenavigation) {
|
|
if (empty($corenavigation)) {
|
|
unset($corenavigations[$node]);
|
|
}
|
|
}
|
|
|
|
// Community/additional plugins have navigation node.
|
|
$pluginnavigations = [];
|
|
foreach ($plugins as $componentname => $plugin) {
|
|
$pluginentrypoint = new $plugin();
|
|
$pluginentrypointobject = $pluginentrypoint->get_navigation_node();
|
|
// Don't need the plugins without navigation node.
|
|
if ($pluginentrypointobject === null || !\core\plugininfo\qbank::is_plugin_enabled($componentname)) {
|
|
unset($plugins[$componentname]);
|
|
continue;
|
|
}
|
|
$pluginnavigations[$pluginentrypointobject->get_navigation_key()] = [
|
|
'title' => $pluginentrypointobject->get_navigation_title(),
|
|
'url' => $pluginentrypointobject->get_navigation_url(),
|
|
'capabilities' => $pluginentrypointobject->get_navigation_capabilities()
|
|
];
|
|
}
|
|
|
|
$contexts = new core_question\local\bank\question_edit_contexts($context);
|
|
foreach ($corenavigations as $key => $corenavigation) {
|
|
if ($contexts->have_one_edit_tab_cap($key)) {
|
|
$questionnode->add($corenavigation['title'], new moodle_url(
|
|
$corenavigation['url'], $params), navigation_node::TYPE_SETTING, null, $key);
|
|
}
|
|
}
|
|
|
|
foreach ($pluginnavigations as $key => $pluginnavigation) {
|
|
if (is_array($pluginnavigation['capabilities'])) {
|
|
if (!$contexts->have_one_cap($pluginnavigation['capabilities'])) {
|
|
continue;
|
|
}
|
|
}
|
|
$questionnode->add($pluginnavigation['title'], new moodle_url(
|
|
$pluginnavigation['url'], $params), navigation_node::TYPE_SETTING, null, $key);
|
|
}
|
|
|
|
return $questionnode;
|
|
}
|
|
|
|
/**
|
|
* Get the array of capabilities for question.
|
|
*
|
|
* @return array all the capabilities that relate to accessing particular questions.
|
|
*/
|
|
function question_get_question_capabilities(): array {
|
|
return [
|
|
'moodle/question:add',
|
|
'moodle/question:editmine',
|
|
'moodle/question:editall',
|
|
'moodle/question:viewmine',
|
|
'moodle/question:viewall',
|
|
'moodle/question:usemine',
|
|
'moodle/question:useall',
|
|
'moodle/question:movemine',
|
|
'moodle/question:moveall',
|
|
'moodle/question:tagmine',
|
|
'moodle/question:tagall',
|
|
'moodle/question:commentmine',
|
|
'moodle/question:commentall',
|
|
];
|
|
}
|
|
|
|
/**
|
|
* Get the question bank caps.
|
|
*
|
|
* @return array all the question bank capabilities.
|
|
*/
|
|
function question_get_all_capabilities(): array {
|
|
$caps = question_get_question_capabilities();
|
|
$caps[] = 'moodle/question:managecategory';
|
|
$caps[] = 'moodle/question:flag';
|
|
return $caps;
|
|
}
|
|
|
|
/**
|
|
* Helps call file_rewrite_pluginfile_urls with the right parameters.
|
|
*
|
|
* @package core_question
|
|
* @category files
|
|
* @param string $text text being processed
|
|
* @param string $file the php script used to serve files
|
|
* @param int $contextid context ID
|
|
* @param string $component component
|
|
* @param string $filearea filearea
|
|
* @param array $ids other IDs will be used to check file permission
|
|
* @param int $itemid item ID
|
|
* @param array $options options
|
|
* @return string
|
|
*/
|
|
function question_rewrite_question_urls($text, $file, $contextid, $component, $filearea,
|
|
array $ids, $itemid, array $options=null): string {
|
|
|
|
$idsstr = '';
|
|
if (!empty($ids)) {
|
|
$idsstr .= implode('/', $ids);
|
|
}
|
|
if ($itemid !== null) {
|
|
$idsstr .= '/' . $itemid;
|
|
}
|
|
return file_rewrite_pluginfile_urls($text, $file, $contextid, $component,
|
|
$filearea, $idsstr, $options);
|
|
}
|
|
|
|
/**
|
|
* Rewrite the PLUGINFILE urls in part of the content of a question, for use when
|
|
* viewing the question outside an attempt (for example, in the question bank
|
|
* listing or in the quiz statistics report).
|
|
*
|
|
* @param string $text the question text.
|
|
* @param int $questionid the question id.
|
|
* @param int $filecontextid the context id of the question being displayed.
|
|
* @param string $filecomponent the component that owns the file area.
|
|
* @param string $filearea the file area name.
|
|
* @param int|null $itemid the file's itemid
|
|
* @param int $previewcontextid the context id where the preview is being displayed.
|
|
* @param string $previewcomponent component responsible for displaying the preview.
|
|
* @param array $options text and file options ('forcehttps'=>false)
|
|
* @return string $questiontext with URLs rewritten.
|
|
*/
|
|
function question_rewrite_question_preview_urls($text, $questionid, $filecontextid, $filecomponent, $filearea, $itemid,
|
|
$previewcontextid, $previewcomponent, $options = null): string {
|
|
|
|
$path = "preview/$previewcontextid/$previewcomponent/$questionid";
|
|
if ($itemid) {
|
|
$path .= '/' . $itemid;
|
|
}
|
|
|
|
return file_rewrite_pluginfile_urls($text, 'pluginfile.php', $filecontextid,
|
|
$filecomponent, $filearea, $path, $options);
|
|
}
|
|
|
|
/**
|
|
* Called by pluginfile.php to serve files related to the 'question' core
|
|
* component and for files belonging to qtypes.
|
|
*
|
|
* For files that relate to questions in a question_attempt, then we delegate to
|
|
* a function in the component that owns the attempt (for example in the quiz,
|
|
* or in core question preview) to get necessary inforation.
|
|
*
|
|
* (Note that, at the moment, all question file areas relate to questions in
|
|
* attempts, so the If at the start of the last paragraph is always true.)
|
|
*
|
|
* Does not return, either calls send_file_not_found(); or serves the file.
|
|
*
|
|
* @category files
|
|
* @param stdClass $course course settings object
|
|
* @param stdClass $context context object
|
|
* @param string $component the name of the component we are serving files for.
|
|
* @param string $filearea the name of the file area.
|
|
* @param array $args the remaining bits of the file path.
|
|
* @param bool $forcedownload whether the user must be forced to download the file.
|
|
* @param array $options additional options affecting the file serving
|
|
* @return array|bool
|
|
*/
|
|
function question_pluginfile($course, $context, $component, $filearea, $args, $forcedownload, $options = []) {
|
|
global $DB, $CFG;
|
|
|
|
// Special case, sending a question bank export.
|
|
if ($filearea === 'export') {
|
|
list($context, $course, $cm) = get_context_info_array($context->id);
|
|
require_login($course, false, $cm);
|
|
|
|
require_once($CFG->dirroot . '/question/editlib.php');
|
|
$contexts = new core_question\local\bank\question_edit_contexts($context);
|
|
// Check export capability.
|
|
$contexts->require_one_edit_tab_cap('export');
|
|
$categoryid = (int)array_shift($args);
|
|
$format = array_shift($args);
|
|
$cattofile = array_shift($args);
|
|
$contexttofile = array_shift($args);
|
|
$filename = array_shift($args);
|
|
|
|
// Load parent class for import/export.
|
|
require_once($CFG->dirroot . '/question/format.php');
|
|
require_once($CFG->dirroot . '/question/editlib.php');
|
|
require_once($CFG->dirroot . '/question/format/' . $format . '/format.php');
|
|
|
|
$classname = 'qformat_' . $format;
|
|
if (!class_exists($classname)) {
|
|
send_file_not_found();
|
|
}
|
|
|
|
$qformat = new $classname();
|
|
|
|
if (!$category = $DB->get_record('question_categories', array('id' => $categoryid))) {
|
|
send_file_not_found();
|
|
}
|
|
|
|
$qformat->setCategory($category);
|
|
$qformat->setContexts($contexts->having_one_edit_tab_cap('export'));
|
|
$qformat->setCourse($course);
|
|
|
|
if ($cattofile == 'withcategories') {
|
|
$qformat->setCattofile(true);
|
|
} else {
|
|
$qformat->setCattofile(false);
|
|
}
|
|
|
|
if ($contexttofile == 'withcontexts') {
|
|
$qformat->setContexttofile(true);
|
|
} else {
|
|
$qformat->setContexttofile(false);
|
|
}
|
|
|
|
if (!$qformat->exportpreprocess()) {
|
|
send_file_not_found();
|
|
throw new moodle_exception('exporterror', 'question', $thispageurl->out());
|
|
}
|
|
|
|
// Export data to moodle file pool.
|
|
if (!$content = $qformat->exportprocess()) {
|
|
send_file_not_found();
|
|
}
|
|
|
|
send_file($content, $filename, 0, 0, true, true, $qformat->mime_type());
|
|
}
|
|
|
|
// Normal case, a file belonging to a question.
|
|
$qubaidorpreview = array_shift($args);
|
|
|
|
// Two sub-cases: 1. A question being previewed outside an attempt/usage.
|
|
if ($qubaidorpreview === 'preview') {
|
|
$previewcontextid = (int)array_shift($args);
|
|
$previewcomponent = array_shift($args);
|
|
$questionid = (int) array_shift($args);
|
|
$previewcontext = context_helper::instance_by_id($previewcontextid);
|
|
|
|
$result = component_callback($previewcomponent, 'question_preview_pluginfile', array(
|
|
$previewcontext, $questionid,
|
|
$context, $component, $filearea, $args,
|
|
$forcedownload, $options), 'callbackmissing');
|
|
|
|
if ($result === 'callbackmissing') {
|
|
throw new coding_exception("Component {$previewcomponent} does not define the callback " .
|
|
"{$previewcomponent}_question_preview_pluginfile callback. " .
|
|
"Which is required if you are using question_rewrite_question_preview_urls.", DEBUG_DEVELOPER);
|
|
}
|
|
|
|
send_file_not_found();
|
|
}
|
|
|
|
// 2. A question being attempted in the normal way.
|
|
$qubaid = (int)$qubaidorpreview;
|
|
$slot = (int)array_shift($args);
|
|
|
|
$module = $DB->get_field('question_usages', 'component',
|
|
array('id' => $qubaid));
|
|
if (!$module) {
|
|
send_file_not_found();
|
|
}
|
|
|
|
if ($module === 'core_question_preview') {
|
|
return qbank_previewquestion\helper::question_preview_question_pluginfile($course, $context,
|
|
$component, $filearea, $qubaid, $slot, $args, $forcedownload, $options);
|
|
|
|
} else {
|
|
$dir = core_component::get_component_directory($module);
|
|
if (!file_exists("$dir/lib.php")) {
|
|
send_file_not_found();
|
|
}
|
|
include_once("$dir/lib.php");
|
|
|
|
$filefunction = $module . '_question_pluginfile';
|
|
if (function_exists($filefunction)) {
|
|
$filefunction($course, $context, $component, $filearea, $qubaid, $slot,
|
|
$args, $forcedownload, $options);
|
|
}
|
|
|
|
// Okay, we're here so lets check for function without 'mod_'.
|
|
if (strpos($module, 'mod_') === 0) {
|
|
$filefunctionold = substr($module, 4) . '_question_pluginfile';
|
|
if (function_exists($filefunctionold)) {
|
|
$filefunctionold($course, $context, $component, $filearea, $qubaid, $slot,
|
|
$args, $forcedownload, $options);
|
|
}
|
|
}
|
|
|
|
send_file_not_found();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Serve questiontext files in the question text when they are displayed in this report.
|
|
*
|
|
* @param context $previewcontext the context in which the preview is happening.
|
|
* @param int $questionid the question id.
|
|
* @param context $filecontext the file (question) context.
|
|
* @param string $filecomponent the component the file belongs to.
|
|
* @param string $filearea the file area.
|
|
* @param array $args remaining file args.
|
|
* @param bool $forcedownload
|
|
* @param array $options additional options affecting the file serving.
|
|
*/
|
|
function core_question_question_preview_pluginfile($previewcontext, $questionid, $filecontext, $filecomponent,
|
|
$filearea, $args, $forcedownload, $options = []): void {
|
|
global $DB;
|
|
$sql = 'SELECT q.*,
|
|
qc.contextid
|
|
FROM {question} q
|
|
JOIN {question_versions} qv
|
|
ON qv.questionid = q.id
|
|
JOIN {question_bank_entries} qbe
|
|
ON qbe.id = qv.questionbankentryid
|
|
JOIN {question_categories} qc
|
|
ON qc.id = qbe.questioncategoryid
|
|
WHERE q.id = :id
|
|
AND qc.contextid = :contextid';
|
|
|
|
// Verify that contextid matches the question.
|
|
$question = $DB->get_record_sql($sql, ['id' => $questionid, 'contextid' => $filecontext->id], MUST_EXIST);
|
|
|
|
// Check the capability.
|
|
list($context, $course, $cm) = get_context_info_array($previewcontext->id);
|
|
require_login($course, false, $cm);
|
|
|
|
question_require_capability_on($question, 'use');
|
|
|
|
$fs = get_file_storage();
|
|
$relativepath = implode('/', $args);
|
|
$fullpath = "/{$filecontext->id}/{$filecomponent}/{$filearea}/{$relativepath}";
|
|
if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) {
|
|
send_file_not_found();
|
|
}
|
|
|
|
send_stored_file($file, 0, 0, $forcedownload, $options);
|
|
}
|
|
|
|
/**
|
|
* Return a list of page types
|
|
* @param string $pagetype current page type
|
|
* @param stdClass $parentcontext Block's parent context
|
|
* @param stdClass $currentcontext Current context of block
|
|
* @return array
|
|
*/
|
|
function question_page_type_list($pagetype, $parentcontext, $currentcontext): array {
|
|
global $CFG;
|
|
$types = [
|
|
'question-*' => get_string('page-question-x', 'question'),
|
|
'question-edit' => get_string('page-question-edit', 'question'),
|
|
'question-category' => get_string('page-question-category', 'question'),
|
|
'question-export' => get_string('page-question-export', 'question'),
|
|
'question-import' => get_string('page-question-import', 'question')
|
|
];
|
|
if ($currentcontext->contextlevel == CONTEXT_COURSE) {
|
|
require_once($CFG->dirroot . '/course/lib.php');
|
|
return array_merge(course_page_type_list($pagetype, $parentcontext, $currentcontext), $types);
|
|
} else {
|
|
return $types;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Does an activity module use the question bank?
|
|
*
|
|
* @param string $modname The name of the module (without mod_ prefix).
|
|
* @return bool true if the module uses questions.
|
|
*/
|
|
function question_module_uses_questions($modname): bool {
|
|
if (plugin_supports('mod', $modname, FEATURE_USES_QUESTIONS)) {
|
|
return true;
|
|
}
|
|
|
|
$component = 'mod_'.$modname;
|
|
if (component_callback_exists($component, 'question_pluginfile')) {
|
|
debugging("{$component} uses questions but doesn't declare FEATURE_USES_QUESTIONS", DEBUG_DEVELOPER);
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* If $oldidnumber ends in some digits then return the next available idnumber of the same form.
|
|
*
|
|
* So idnum -> null (no digits at the end) idnum0099 -> idnum0100 (if that is unused,
|
|
* else whichever of idnum0101, idnume0102, ... is unused. idnum9 -> idnum10.
|
|
*
|
|
* @param string|null $oldidnumber a question idnumber, or can be null.
|
|
* @param int $categoryid a question category id.
|
|
* @return string|null suggested new idnumber for a question in that category, or null if one cannot be found.
|
|
*/
|
|
function core_question_find_next_unused_idnumber(?string $oldidnumber, int $categoryid): ?string {
|
|
global $DB;
|
|
|
|
// The the old idnumber is not of the right form, bail now.
|
|
if ($oldidnumber === null || !preg_match('~\d+$~', $oldidnumber, $matches)) {
|
|
return null;
|
|
}
|
|
|
|
// Find all used idnumbers in one DB query.
|
|
$usedidnumbers = $DB->get_records_select_menu('question_bank_entries', 'questioncategoryid = ? AND idnumber IS NOT NULL',
|
|
[$categoryid], '', 'idnumber, 1');
|
|
|
|
// Find the next unused idnumber.
|
|
$numberbit = 'X' . $matches[0]; // Need a string here so PHP does not do '0001' + 1 = 2.
|
|
$stem = substr($oldidnumber, 0, -strlen($matches[0]));
|
|
do {
|
|
|
|
// If we have got to something9999, insert an extra digit before incrementing.
|
|
if (preg_match('~^(.*[^0-9])(9+)$~', $numberbit, $matches)) {
|
|
$numberbit = $matches[1] . '0' . $matches[2];
|
|
}
|
|
$numberbit++;
|
|
$newidnumber = $stem . substr($numberbit, 1);
|
|
} while (isset($usedidnumbers[$newidnumber]));
|
|
|
|
return (string) $newidnumber;
|
|
}
|
|
|
|
/**
|
|
* Get the question_bank_entry object given a question id.
|
|
*
|
|
* @param int $questionid Question id.
|
|
* @return false|mixed
|
|
* @throws dml_exception
|
|
*/
|
|
function get_question_bank_entry(int $questionid): object {
|
|
global $DB;
|
|
|
|
$sql = "SELECT qbe.*
|
|
FROM {question} q
|
|
JOIN {question_versions} qv ON qv.questionid = q.id
|
|
JOIN {question_bank_entries} qbe ON qbe.id = qv.questionbankentryid
|
|
WHERE q.id = :id";
|
|
|
|
$qbankentry = $DB->get_record_sql($sql, ['id' => $questionid]);
|
|
|
|
return $qbankentry;
|
|
}
|
|
|
|
/**
|
|
* Get the question versions given a question id in a descending sort .
|
|
*
|
|
* @param int $questionid Question id.
|
|
* @return array
|
|
* @throws dml_exception
|
|
*/
|
|
function get_question_version($questionid): array {
|
|
global $DB;
|
|
|
|
$version = $DB->get_records('question_versions', ['questionid' => $questionid]);
|
|
krsort($version);
|
|
|
|
return $version;
|
|
}
|
|
|
|
/**
|
|
* Get the next version number to create base on a Question bank entry id.
|
|
*
|
|
* @param int $questionbankentryid Question bank entry id.
|
|
* @return int next version number.
|
|
* @throws dml_exception
|
|
*/
|
|
function get_next_version(int $questionbankentryid): int {
|
|
global $DB;
|
|
|
|
$sql = "SELECT MAX(qv.version)
|
|
FROM {question_versions} qv
|
|
JOIN {question_bank_entries} qbe ON qbe.id = qv.questionbankentryid
|
|
WHERE qbe.id = :id";
|
|
|
|
$nextversion = $DB->get_field_sql($sql, ['id' => $questionbankentryid]);
|
|
|
|
if ($nextversion) {
|
|
return (int)$nextversion + 1;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* Checks if question is the latest version.
|
|
*
|
|
* @param string $version Question version to check.
|
|
* @param string $questionbankentryid Entry to check against.
|
|
* @return bool
|
|
*/
|
|
function is_latest(string $version, string $questionbankentryid) : bool {
|
|
global $DB;
|
|
|
|
$sql = 'SELECT MAX(version) AS max
|
|
FROM {question_versions}
|
|
WHERE questionbankentryid = ?';
|
|
$latestversion = $DB->get_record_sql($sql, [$questionbankentryid]);
|
|
|
|
if (isset($latestversion->max)) {
|
|
return ($version === $latestversion->max) ? true : false;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Deprecated functions from Moodle 4.0.
|
|
|
|
/**
|
|
* Generate the URL for starting a new preview of a given question with the given options.
|
|
* @param integer $questionid the question to preview.
|
|
* @param string $preferredbehaviour the behaviour to use for the preview.
|
|
* @param float $maxmark the maximum to mark the question out of.
|
|
* @param question_display_options $displayoptions the display options to use.
|
|
* @param int $variant the variant of the question to preview. If null, one will
|
|
* be picked randomly.
|
|
* @param object $context context to run the preview in (affects things like
|
|
* filter settings, theme, lang, etc.) Defaults to $PAGE->context.
|
|
* @return moodle_url the URL.
|
|
* @deprecated since Moodle 4.0
|
|
* @see qbank_previewquestion\helper::question_preview_url()
|
|
* @todo Final deprecation on Moodle 4.4 MDL-72438
|
|
*/
|
|
function question_preview_url($questionid, $preferredbehaviour = null,
|
|
$maxmark = null, $displayoptions = null, $variant = null, $context = null) {
|
|
debugging('Function question_preview_url() has been deprecated and moved to qbank_previewquestion plugin,
|
|
Please use qbank_previewquestion\previewquestion_helper::question_preview_url() instead.', DEBUG_DEVELOPER);
|
|
|
|
return \qbank_previewquestion\helper::question_preview_url($questionid, $preferredbehaviour,
|
|
$maxmark, $displayoptions, $variant, $context);
|
|
}
|
|
|
|
/**
|
|
* Popup params for the question preview.
|
|
*
|
|
* @return array that can be passed as $params to the {@see popup_action()} constructor.
|
|
* @deprecated since Moodle 4.0
|
|
* @see qbank_previewquestion\previewquestion_helper::question_preview_popup_params()
|
|
* @todo Final deprecation on Moodle 4.4 MDL-72438
|
|
*/
|
|
function question_preview_popup_params() {
|
|
debugging('Function question_preview_popup_params() has been deprecated and moved to qbank_previewquestion plugin,
|
|
Please use qbank_previewquestion\previewquestion_helper::question_preview_popup_params() instead.', DEBUG_DEVELOPER);
|
|
|
|
return \qbank_previewquestion\helper::question_preview_popup_params();
|
|
}
|
|
|
|
/**
|
|
* Creates a stamp that uniquely identifies this version of the question
|
|
*
|
|
* In future we want this to use a hash of the question data to guarantee that
|
|
* identical versions have the same version stamp.
|
|
*
|
|
* @param object $question
|
|
* @return string A unique version stamp
|
|
* @deprecated since Moodle 4.0
|
|
* @todo Final deprecation on Moodle 4.4 MDL-72438
|
|
*/
|
|
function question_hash($question) {
|
|
debugging('Function question_hash() has been deprecated without replacement.', DEBUG_DEVELOPER);
|
|
return make_unique_id_code();
|
|
}
|
|
|
|
/**
|
|
* Create url for question export.
|
|
*
|
|
* @param int $contextid
|
|
* @param int $categoryid
|
|
* @param string $format
|
|
* @param string $withcategories
|
|
* @param string $withcontexts
|
|
* @param string $filename
|
|
* @return moodle_url export file url
|
|
* @deprecated since Moodle 4.0 MDL-71573
|
|
* @see qbank_exportquestions\exportquestions_helper
|
|
* @todo Final deprecation on Moodle 4.4 MDL-72438
|
|
*/
|
|
function question_make_export_url($contextid, $categoryid, $format, $withcategories,
|
|
$withcontexts, $filename) {
|
|
debugging('Function question_make_export_url() has been deprecated and moved to qbank_exportquestions plugin,
|
|
Please use qbank_exportquestions\exportquestions_helper::question_make_export_url() instead.', DEBUG_DEVELOPER);
|
|
|
|
return \qbank_exportquestions\exportquestions_helper::question_make_export_url($contextid, $categoryid, $format,
|
|
$withcategories, $withcontexts, $filename);
|
|
}
|
|
|
|
/**
|
|
* Get the URL to export a single question (exportone.php).
|
|
*
|
|
* @param stdClass|question_definition $question the question definition as obtained from
|
|
* question_bank::load_question_data() or question_bank::make_question().
|
|
* (Only ->id and ->contextid are used.)
|
|
* @return moodle_url the requested URL.
|
|
* @deprecated since Moodle 4.0
|
|
* @see \qbank_exporttoxml\helper::question_get_export_single_question_url()
|
|
* @todo Final deprecation on Moodle 4.4 MDL-72438
|
|
*/
|
|
function question_get_export_single_question_url($question) {
|
|
debugging('Function question_get_export_single_question_url() has been deprecated and moved to qbank_exporttoxml plugin,
|
|
please use qbank_exporttoxml\helper::question_get_export_single_question_url() instead.', DEBUG_DEVELOPER);
|
|
qbank_exporttoxml\helper::question_get_export_single_question_url($question);
|
|
}
|
|
|
|
/**
|
|
* Remove stale questions from a category.
|
|
*
|
|
* While questions should not be left behind when they are not used any more,
|
|
* it does happen, maybe via restore, or old logic, or uncovered scenarios. When
|
|
* this happens, the users are unable to delete the question category unless
|
|
* they move those stale questions to another one category, but to them the
|
|
* category is empty as it does not contain anything. The purpose of this function
|
|
* is to detect the questions that may have gone stale and remove them.
|
|
*
|
|
* You will typically use this prior to checking if the category contains questions.
|
|
*
|
|
* The stale questions (unused and hidden to the user) handled are:
|
|
* - hidden questions
|
|
* - random questions
|
|
*
|
|
* @param int $categoryid The category ID.
|
|
* @deprecated since Moodle 4.0 MDL-71585
|
|
* @see qbank_managecategories\helper
|
|
* @todo Final deprecation on Moodle 4.4 MDL-72438
|
|
*/
|
|
function question_remove_stale_questions_from_category($categoryid) {
|
|
debugging('Function question_remove_stale_questions_from_category()
|
|
has been deprecated and moved to qbank_managecategories plugin,
|
|
Please use qbank_managecategories\helper::question_remove_stale_questions_from_category() instead.',
|
|
DEBUG_DEVELOPER);
|
|
\qbank_managecategories\helper::question_remove_stale_questions_from_category($categoryid);
|
|
}
|
|
|
|
/**
|
|
* Private method, only for the use of add_indented_names().
|
|
*
|
|
* Recursively adds an indentedname field to each category, starting with the category
|
|
* with id $id, and dealing with that category and all its children, and
|
|
* return a new array, with those categories in the right order.
|
|
*
|
|
* @param array $categories an array of categories which has had childids
|
|
* fields added by flatten_category_tree(). Passed by reference for
|
|
* performance only. It is not modfied.
|
|
* @param int $id the category to start the indenting process from.
|
|
* @param int $depth the indent depth. Used in recursive calls.
|
|
* @param int $nochildrenof
|
|
* @return array a new array of categories, in the right order for the tree.
|
|
* @deprecated since Moodle 4.0 MDL-71585
|
|
* @see qbank_managecategories\helper
|
|
* @todo Final deprecation on Moodle 4.4 MDL-72438
|
|
*/
|
|
function flatten_category_tree(&$categories, $id, $depth = 0, $nochildrenof = -1) {
|
|
debugging('Function flatten_category_tree() has been deprecated and moved to qbank_managecategories plugin,
|
|
Please use qbank_managecategories\helper::flatten_category_tree() instead.', DEBUG_DEVELOPER);
|
|
return \qbank_managecategories\helper::flatten_category_tree($categories, $id, $depth, $nochildrenof);
|
|
}
|
|
|
|
/**
|
|
* Format categories into an indented list reflecting the tree structure.
|
|
*
|
|
* @param array $categories An array of category objects, for example from the.
|
|
* @param int $nochildrenof
|
|
* @return array The formatted list of categories.
|
|
* @deprecated since Moodle 4.0 MDL-71585
|
|
* @see qbank_managecategories\helper
|
|
* @todo Final deprecation on Moodle 4.4 MDL-72438
|
|
*/
|
|
function add_indented_names($categories, $nochildrenof = -1) {
|
|
debugging('Function add_indented_names() has been deprecated and moved to qbank_managecategories plugin,
|
|
Please use qbank_managecategories\helper::add_indented_names() instead.', DEBUG_DEVELOPER);
|
|
return \qbank_managecategories\helper::add_indented_names($categories, $nochildrenof);
|
|
}
|
|
|
|
/**
|
|
* Output a select menu of question categories.
|
|
* Categories from this course and (optionally) published categories from other courses
|
|
* are included. Optionally, only categories the current user may edit can be included.
|
|
*
|
|
* @param array $contexts
|
|
* @param bool $top
|
|
* @param int $currentcat
|
|
* @param integer $selected optionally, the id of a category to be selected by
|
|
* default in the dropdown.
|
|
* @param int $nochildrenof
|
|
* @deprecated since Moodle 4.0 MDL-71585
|
|
* @see qbank_managecategories\helper
|
|
* @todo Final deprecation on Moodle 4.4 MDL-72438
|
|
*/
|
|
function question_category_select_menu($contexts, $top = false, $currentcat = 0,
|
|
$selected = "", $nochildrenof = -1) {
|
|
debugging('Function question_category_select_menu() has been deprecated and moved to qbank_managecategories plugin,
|
|
Please use qbank_managecategories\helper::question_category_select_menu() instead.', DEBUG_DEVELOPER);
|
|
\qbank_managecategories\helper::question_category_select_menu($contexts, $top, $currentcat, $selected, $nochildrenof);
|
|
}
|
|
|
|
/**
|
|
* Get all the category objects, including a count of the number of questions in that category,
|
|
* for all the categories in the lists $contexts.
|
|
*
|
|
* @param mixed $contexts either a single contextid, or a comma-separated list of context ids.
|
|
* @param string $sortorder used as the ORDER BY clause in the select statement.
|
|
* @param bool $top Whether to return the top categories or not.
|
|
* @return array of category objects.
|
|
* @deprecated since Moodle 4.0 MDL-71585
|
|
* @see qbank_managecategories\helper
|
|
* @todo Final deprecation on Moodle 4.4 MDL-72438
|
|
*/
|
|
function get_categories_for_contexts($contexts, $sortorder = 'parent, sortorder, name ASC', $top = false) {
|
|
debugging('Function get_categories_for_contexts() has been deprecated and moved to qbank_managecategories plugin,
|
|
Please use qbank_managecategories\helper::get_categories_for_contexts() instead.', DEBUG_DEVELOPER);
|
|
return \qbank_managecategories\helper::get_categories_for_contexts($contexts, $sortorder, $top);
|
|
}
|
|
|
|
/**
|
|
* Output an array of question categories.
|
|
*
|
|
* @param array $contexts The list of contexts.
|
|
* @param bool $top Whether to return the top categories or not.
|
|
* @param int $currentcat
|
|
* @param bool $popupform
|
|
* @param int $nochildrenof
|
|
* @param boolean $escapecontextnames Whether the returned name of the thing is to be HTML escaped or not.
|
|
* @return array
|
|
* @deprecated since Moodle 4.0 MDL-71585
|
|
* @see qbank_managecategories\helper
|
|
* @todo Final deprecation on Moodle 4.4 MDL-72438
|
|
*/
|
|
function question_category_options($contexts, $top = false, $currentcat = 0,
|
|
$popupform = false, $nochildrenof = -1, $escapecontextnames = true) {
|
|
debugging('Function question_category_options() has been deprecated and moved to qbank_managecategories plugin,
|
|
Please use qbank_managecategories\helper::question_category_options() instead.', DEBUG_DEVELOPER);
|
|
return \qbank_managecategories\helper::question_category_options($contexts, $top, $currentcat,
|
|
$popupform, $nochildrenof, $escapecontextnames);
|
|
}
|
|
|
|
/**
|
|
* Add context in categories key.
|
|
*
|
|
* @param array $categories The list of categories.
|
|
* @return array
|
|
* @deprecated since Moodle 4.0 MDL-71585
|
|
* @see qbank_managecategories\helper
|
|
* @todo Final deprecation on Moodle 4.4 MDL-72438
|
|
*/
|
|
function question_add_context_in_key($categories) {
|
|
debugging('Function question_add_context_in_key() has been deprecated and moved to qbank_managecategories plugin,
|
|
Please use qbank_managecategories\helper::question_add_context_in_key() instead.', DEBUG_DEVELOPER);
|
|
return \qbank_managecategories\helper::question_add_context_in_key($categories);
|
|
}
|
|
|
|
/**
|
|
* Finds top categories in the given categories hierarchy and replace their name with a proper localised string.
|
|
*
|
|
* @param array $categories An array of question categories.
|
|
* @param boolean $escape Whether the returned name of the thing is to be HTML escaped or not.
|
|
* @return array The same question category list given to the function, with the top category names being translated.
|
|
* @deprecated since Moodle 4.0 MDL-71585
|
|
* @see qbank_managecategories\helper
|
|
* @todo Final deprecation on Moodle 4.4 MDL-72438
|
|
*/
|
|
function question_fix_top_names($categories, $escape = true) {
|
|
debugging('Function question_fix_top_names() has been deprecated and moved to qbank_managecategories plugin,
|
|
Please use qbank_managecategories\helper::question_fix_top_names() instead.', DEBUG_DEVELOPER);
|
|
return \qbank_managecategories\helper::question_fix_top_names($categories, $escape);
|
|
}
|