Mark Johnson
89a613460a
When moving question categories during the migration to mod_qbank, set references using questions in those categories were not updated with the new context. Furthermore, since top categories from system, category and course contexts are deleted and not moved, and set references that filtered based on a top category were left pointing to a non-existant category. This change updates set references using the top category to point to the new top category where its subcategories are moved, and updates set references for all subcategories to set the new context.
1963 lines
73 KiB
PHP
1963 lines
73 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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* @param bool $coursedeletion Is the course this category is under being deleted? If so, move saved questions to the site course.
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*/
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function question_category_delete_safe($category, bool $coursedeletion = false): 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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$name = get_string('unknown', 'question');
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if ($context !== false) {
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$name = $context->get_context_name();
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$parentcontext = $context->get_course_context(false);
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$course = ($parentcontext && !$coursedeletion) ? get_course($parentcontext->instanceid) : get_site();
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}
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$qbank = core_question\local\bank\question_bank_helper::get_default_open_instance_system_type($course, true);
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question_save_from_deletion(array_keys($questionids), $qbank->context->id, $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, $questiondata->contextid);
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// Now recursively delete all child questions
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if ($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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// 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($question->id);
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// Log the deletion of this question.
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// Any qbank plugins storing additional question data should observe this event and perform the necessary deletion.
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$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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* @param bool $coursedeletion Are we calling this as part of deleting the course the context is under?
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* @return array only returns an empty array for backwards compatibility.
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*/
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function question_delete_context($contextid, bool $coursedeletion = false): 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, $coursedeletion);
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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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* Creates a new category to save the questions in use.
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*
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* @param array $questionids of question ids
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* @param int $newcontextid the context to create the saved category in.
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* @param string $oldplace a textual description of the think being deleted,
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* e.g. from get_context_name
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* @param object $newcategory
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* @return mixed false on
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*/
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function question_save_from_deletion($questionids, $newcontextid, $oldplace, $newcategory = null) {
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global $DB;
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$newcontext = context::instance_by_id($newcontextid);
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if ($newcontext->contextlevel !== CONTEXT_MODULE) {
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throw new moodle_exception("Invalid contextlevel: {$newcontext->contextlevel} for \$newcontextid {$newcontextid}");
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}
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// Make a category in the parent context to move the questions to.
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if (is_null($newcategory)) {
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$newcategory = new stdClass();
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$newcategory->parent = question_get_top_category($newcontextid, true)->id;
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$newcategory->contextid = $newcontextid;
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// Max length of column name in question_categories is 255.
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$newcategory->name = shorten_text(get_string('questionsrescuedfrom', 'question', $oldplace), 255);
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$newcategory->info = get_string('questionsrescuedfrominfo', 'question', $oldplace);
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$newcategory->sortorder = 999;
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$newcategory->stamp = make_unique_id_code();
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$newcategory->id = $DB->insert_record('question_categories', $newcategory);
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}
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// Move any remaining questions to the 'saved' category.
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if (!question_move_questions_to_category($questionids, $newcategory->id)) {
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return false;
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}
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return $newcategory;
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}
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/**
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* All question categories and their questions are deleted for this activity.
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*
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* @param object $cm the course module object representing the activity
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* @param bool $notused the argument is not used any more. Kept for backwards compatibility.
|
|
* @param bool $coursedeletion Are we calling this as part of deleting the course the activity belongs to?
|
|
* @return boolean
|
|
*/
|
|
function question_delete_activity($cm, $notused = false, bool $coursedeletion = false): bool {
|
|
$modcontext = context_module::instance($cm->id);
|
|
question_delete_context($modcontext->id, $coursedeletion);
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* This function will handle moving all tag instances to a new context for a
|
|
* given list of questions.
|
|
*
|
|
* @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, must be module context.
|
|
*/
|
|
function question_move_question_tags_to_new_context(array $questions, context $newcontext): void {
|
|
|
|
if ($newcontext->contextlevel !== CONTEXT_MODULE) {
|
|
debugging("Invalid contextlevel: {$newcontext->contextlevel}", DEBUG_DEVELOPER);
|
|
}
|
|
|
|
$instancesfornewcontext = [];
|
|
$questionids = array_map(function($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 == $newcontext->id;
|
|
|
|
if ($istaginnewcontext) {
|
|
// This tag instance is already in the correct context so we can
|
|
// ignore it.
|
|
continue;
|
|
}
|
|
|
|
$instancesfornewcontext[] = $tagid;
|
|
}
|
|
}
|
|
|
|
if (!empty($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, true);
|
|
if (isset($filter['questioncategoryid'])) {
|
|
$filter = question_reference_manager::convert_legacy_set_reference_filter_condition($filter);
|
|
}
|
|
if ((int)$filter['filter']['category']['values'][0] === $oldcategoryid) {
|
|
$setreference->questionscontextid = $newcontextid;
|
|
if ($oldcategoryid !== $newcatgoryid) {
|
|
$filter['filter']['category']['values'][0] = $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;
|
|
|
|
$newcontext = context::instance_by_id($newcontextid);
|
|
if ($newcontext->contextlevel !== CONTEXT_MODULE) {
|
|
debugging("Invalid contextlevel: {$newcontext->contextlevel}, must use CONTEXT_MODULE", DEBUG_DEVELOPER);
|
|
}
|
|
|
|
$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 => $qtype) {
|
|
|
|
// If the question type is invalid, use "missingtype" so we have a valid qtype to call move_files() on.
|
|
if (!\question_bank::is_qtype_installed($qtype)) {
|
|
$qtype = 'missingtype';
|
|
}
|
|
|
|
question_bank::get_qtype($qtype)->move_files($questionid, $oldcontextid, $newcontextid);
|
|
// Purge this question from the cache.
|
|
question_bank::notify_question_edited($questionid);
|
|
|
|
$questions[] = (object) [
|
|
'id' => $questionid,
|
|
'contextid' => $oldcontextid
|
|
];
|
|
}
|
|
|
|
question_move_question_tags_to_new_context($questions, $newcontext);
|
|
|
|
$subcatids = $DB->get_records_menu('question_categories', ['parent' => $categoryid], '', 'id,1');
|
|
foreach ($subcatids as $subcatid => $notused) {
|
|
move_question_set_references($subcatid, $subcatid, $oldcontextid, $newcontext->id);
|
|
$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 {@see \mod_quiz\quiz_attempt}, 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 \core_tag_tag[]|null $tagobjects The tags for the given $question.
|
|
* @param stdClass[]|null $filtercourses deprecated argument and should not be used
|
|
*/
|
|
function _tidy_question($question, $category, ?array $tagobjects = null, ?array $filtercourses = null): void {
|
|
|
|
if ($filtercourses !== null) {
|
|
debugging("Filtercourses is a deprecated argument in " . __FUNCTION__, DEBUG_DEVELOPER);
|
|
}
|
|
|
|
// 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->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[] $filtercourses deprecated argument and should not be used
|
|
* @return bool Indicates success or failure.
|
|
*/
|
|
function get_question_options(&$questions, $loadtags = false, $filtercourses = null) {
|
|
global $DB;
|
|
|
|
if ($filtercourses !== null) {
|
|
debugging("Filtercourses is a deprecated argument in " . __FUNCTION__, DEBUG_DEVELOPER);
|
|
}
|
|
|
|
$questionlist = is_array($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 \core_tag_tag[] $tagobjects The tags for the given $question.
|
|
* @param stdClass $categorycontext The question categories context.
|
|
* @param stdClass[]|null $filtercourses deprecated argument and should not be used.
|
|
* @return stdClass $sortedtagobjects Sorted tag objects.
|
|
*/
|
|
function question_sort_tags($tagobjects, $categorycontext, $filtercourses = null): stdClass {
|
|
|
|
if ($filtercourses !== null) {
|
|
debugging("Filtercourses is a deprecated argument in " . __FUNCTION__, DEBUG_DEVELOPER);
|
|
}
|
|
|
|
$sortedtagobjects = new stdClass();
|
|
$sortedtagobjects->tagobjects = [];
|
|
$sortedtagobjects->tags = [];
|
|
$taginstanceidstonormalise = [];
|
|
|
|
foreach ($tagobjects as $tagobject) {
|
|
$tagcontextid = $tagobject->taginstancecontextid;
|
|
$tagcontext = context::instance_by_id($tagcontextid);
|
|
// All tag instances 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. Optionally create one if it does not exist.
|
|
*
|
|
* @param int $contextid a context id.
|
|
* @param bool $createifnotexists create the default catagory if it does not exist.
|
|
* @return stdClass|bool the default question category for that context, or false if none.
|
|
*/
|
|
function question_get_default_category($contextid, bool $createifnotexists = false) {
|
|
global $DB;
|
|
|
|
$context = \core\context::instance_by_id($contextid);
|
|
if ($context->contextlevel !== CONTEXT_MODULE) {
|
|
debugging(
|
|
"Invalid context level {$context->contextlevel} for default category. Please use CONTEXT_MODULE",
|
|
DEBUG_DEVELOPER
|
|
);
|
|
return false;
|
|
}
|
|
|
|
$defaultcats = $DB->get_records_select('question_categories', 'contextid = ? AND parent <> 0', [$contextid], 'id', '*', 0, 1);
|
|
|
|
$defaultcat = reset($defaultcats);
|
|
|
|
if (empty($defaultcat) && $createifnotexists) {
|
|
|
|
// We need to make a top category first if it doesn't exist.
|
|
$topcategory = question_get_top_category($context->id, true);
|
|
|
|
// We don't have one, so we need to make one.
|
|
$defaultcat = new stdClass();
|
|
$contextname = $context->get_context_name(false, true);
|
|
// Max length of name field is 255.
|
|
$defaultcat->name = shorten_text(get_string('defaultfor', 'question', $contextname), 255);
|
|
$defaultcat->info = get_string('defaultinfofor', 'question', $contextname);
|
|
$defaultcat->contextid = $context->id;
|
|
$defaultcat->parent = $topcategory->id;
|
|
// By default, all categories get this number, and are sorted alphabetically.
|
|
$defaultcat->sortorder = 999;
|
|
$defaultcat->stamp = make_unique_id_code();
|
|
$defaultcat->id = $DB->insert_record('question_categories', $defaultcat);
|
|
}
|
|
|
|
return $defaultcat;
|
|
}
|
|
|
|
/**
|
|
* 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]);
|
|
|
|
$context = context::instance_by_id($contextid);
|
|
if ($context->contextlevel !== CONTEXT_MODULE) {
|
|
debugging(
|
|
"Invalid context level: {$context->contextlevel} for question_get_top_category, must be CONTEXT_MODULE",
|
|
DEBUG_DEVELOPER
|
|
);
|
|
return false;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* 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 = [];
|
|
|
|
// A list of category IDs to check for any sub-categories.
|
|
$subcategories = [$categoryid];
|
|
$contextid = $DB->get_field('question_categories', 'contextid', ['id' => $categoryid]);
|
|
|
|
while ($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] = $subcategory;
|
|
}
|
|
|
|
[$in, $params] = $DB->get_in_or_equal($subcategories);
|
|
$params[] = $contextid;
|
|
|
|
// Order by id is not strictly needed, but it will be cheap, and makes the results deterministic.
|
|
$subcategories = $DB->get_records_select_menu('question_categories',
|
|
"parent $in AND contextid = ?", $params, 'id', 'id,id AS id2');
|
|
}
|
|
|
|
return $categorylist;
|
|
}
|
|
|
|
/**
|
|
* Get all parent categories of a given question category in descending 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;
|
|
|
|
$category = $DB->get_record('question_categories', ['id' => $categoryid]);
|
|
$contextid = $category->contextid;
|
|
|
|
$categorylist = [];
|
|
while ($category->parent) {
|
|
$category = $DB->get_record('question_categories', ['id' => $category->parent]);
|
|
if (!$category || $category->contextid != $contextid) {
|
|
break;
|
|
}
|
|
$categorylist[] = $category->id;
|
|
}
|
|
|
|
// Present the list in descending order (the top category at the top).
|
|
return array_reverse($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) && property_exists($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' => $questionid], MUST_EXIST);
|
|
}
|
|
}
|
|
|
|
if (!isset($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 $context a context
|
|
* @return string|bool|void A URL for editing questions in this context.
|
|
*/
|
|
function question_edit_url($context) {
|
|
global $CFG, $SITE;
|
|
if (!has_any_capability(question_get_question_capabilities(), $context)) {
|
|
return false;
|
|
}
|
|
|
|
if ($context->contextlevel !== CONTEXT_MODULE) {
|
|
debugging(
|
|
"Invalid contextlevel: {$context->contextlevel} provided for question_edit_url, must be CONTEXT_MODULE",
|
|
DEBUG_DEVELOPER
|
|
);
|
|
return false;
|
|
}
|
|
|
|
$baseurl = $CFG->wwwroot . '/question/edit.php?';
|
|
$defaultcategory = question_get_default_category($context->id, true);
|
|
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;
|
|
}
|
|
|
|
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;
|
|
|
|
$iscourse = $context->contextlevel === CONTEXT_COURSE;
|
|
|
|
if ($iscourse) {
|
|
$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 = $navigationnode->add(get_string($iscourse ? 'questionbank_plural' : '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
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*/
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|
function is_latest(string $version, string $questionbankentryid): bool {
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|
global $DB;
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|
|
|
$sql = 'SELECT MAX(version) AS max
|
|
FROM {question_versions}
|
|
WHERE questionbankentryid = ?';
|
|
$latestversion = $DB->get_record_sql($sql, [$questionbankentryid]);
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|
|
|
if (isset($latestversion->max)) {
|
|
return ($version === $latestversion->max) ? true : false;
|
|
}
|
|
return false;
|
|
}
|