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2a874d65ce
Also, use the new method in the random question class to get the list of random questions reliably.
1821 lines
65 KiB
PHP
1821 lines
65 KiB
PHP
<?php // $Id$
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///////////////////////////////////////////////////////////////////////////
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// //
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// NOTICE OF COPYRIGHT //
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// //
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// Moodle - Modular Object-Oriented Dynamic Learning Environment //
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// http://moodle.org //
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// //
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// Copyright (C) 1999 onwards Martin Dougiamas and others //
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// //
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// This program 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 2 of the License, or //
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// (at your option) any later version. //
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// //
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// This program 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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// http://www.gnu.org/copyleft/gpl.html //
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// //
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///////////////////////////////////////////////////////////////////////////
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/**
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* Functions used to show question editing interface
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*
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* @license http://www.gnu.org/copyleft/gpl.html GNU Public License
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* @package questionbank
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*//** */
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require_once($CFG->libdir.'/questionlib.php');
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define('DEFAULT_QUESTIONS_PER_PAGE', 20);
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function get_module_from_cmid($cmid) {
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global $CFG, $DB;
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if (!$cmrec = $DB->get_record_sql("SELECT cm.*, md.name as modname
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FROM {course_modules} cm,
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{modules} md
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WHERE cm.id = ? AND
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md.id = cm.module", array($cmid))){
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print_error('invalidcoursemodule');
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} elseif (!$modrec =$DB->get_record($cmrec->modname, array('id' => $cmrec->instance))) {
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print_error('invalidcoursemodule');
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}
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$modrec->instance = $modrec->id;
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$modrec->cmid = $cmrec->id;
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$cmrec->name = $modrec->name;
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return array($modrec, $cmrec);
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}
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/**
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* Function to read all questions for category into big array
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*
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* @param int $category category number
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* @param bool $noparent if true only questions with NO parent will be selected
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* @param bool $recurse include subdirectories
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* @param bool $export set true if this is called by questionbank export
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* @author added by Howard Miller June 2004
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*/
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function get_questions_category( $category, $noparent=false, $recurse=true, $export=true ) {
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global $QTYPES, $DB;
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// questions will be added to an array
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$qresults = array();
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// build sql bit for $noparent
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$npsql = '';
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if ($noparent) {
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$npsql = " and parent='0' ";
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}
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// get (list) of categories
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if ($recurse) {
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$categorylist = question_categorylist( $category->id );
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}
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else {
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$categorylist = $category->id;
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}
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// get the list of questions for the category
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list ($usql, $params) = $DB->get_in_or_equal(explode(',', $categorylist));
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if ($questions = $DB->get_records_select("question","category $usql $npsql", $params, "qtype, name ASC")) {
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// iterate through questions, getting stuff we need
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foreach($questions as $question) {
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$questiontype = $QTYPES[$question->qtype];
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$question->export_process = $export;
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$questiontype->get_question_options( $question );
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$qresults[] = $question;
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}
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}
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return $qresults;
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}
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/**
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* @param integer $categoryid a category id.
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* @return boolean whether this is the only top-level category in a context.
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*/
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function question_is_only_toplevel_category_in_context($categoryid) {
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global $DB;
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return 1 == $DB->count_records_sql("
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SELECT count(*)
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FROM {question_categories} c1,
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{question_categories} c2
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WHERE c2.id = ?
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AND c1.contextid = c2.contextid
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AND c1.parent = 0 AND c2.parent = 0", array($categoryid));
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}
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/**
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* Check whether this user is allowed to delete this category.
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*
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* @param integer $todelete a category id.
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*/
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function question_can_delete_cat($todelete) {
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global $DB;
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if (question_is_only_toplevel_category_in_context($todelete)) {
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print_error('cannotdeletecate', 'question');
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} else {
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$contextid = $DB->get_field('question_categories', 'contextid', array('id' => $todelete));
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require_capability('moodle/question:managecategory', get_context_instance_by_id($contextid));
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}
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}
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abstract class question_bank_column_base {
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/**
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* @var question_bank_view
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*/
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protected $qbank;
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/**
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* Constructor.
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* @param $qbank the question_bank_view we are helping to render.
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*/
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public function __construct(question_bank_view $qbank) {
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$this->qbank = $qbank;
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$this->init();
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require_js(array('yui_yahoo','yui_event'));
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require_js('question/qbank.js');
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}
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/**
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* A chance for subclasses to initialise themselves, for example to load lang strings,
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* without having to override the constructor.
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*/
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protected function init() {
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}
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public function is_extra_row() {
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return false;
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}
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/**
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* Output the column header cell.
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* @param integer $currentsort 0 for none. 1 for normal sort, -1 for reverse sort.
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*/
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public function display_header() {
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echo '<th class="header ' . $this->get_classes() . '" scope="col">';
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$sortable = $this->is_sortable();
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$name = $this->get_name();
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$title = $this->get_title();
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$tip = $this->get_title_tip();
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if (is_array($sortable)) {
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if ($title) {
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echo '<div class="title">' . $title . '</div>';
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}
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$links = array();
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foreach ($sortable as $subsort => $details) {
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$links[] = $this->make_sort_link($name . '_' . $subsort,
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$details['title'], '', !empty($details['reverse']));
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}
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echo '<div class="sorters">' . implode(' / ', $links) . '</div>';
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} else if ($sortable) {
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echo $this->make_sort_link($name, $title, $tip);
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} else {
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if ($tip) {
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echo '<span title="' . $tip . '">';
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}
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echo $title;
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if ($tip) {
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echo '</span>';
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}
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}
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echo "</th>\n";
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}
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/**
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* Title for this column. Not used if is_sortable returns an array.
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* @param object $question the row from the $question table, augmented with extra information.
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* @param string $rowclasses CSS class names that should be applied to this row of output.
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*/
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abstract protected function get_title();
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/**
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* @return string a fuller version of the name. Use this when get_title() returns
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* something very short, and you want a longer version as a tool tip.
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*/
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protected function get_title_tip() {
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return '';
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}
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/**
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* Get a link that changes the sort order, and indicates the current sort state.
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* @param $name internal name used for this type of sorting.
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* @param $currentsort the current sort order -1, 0, 1 for descending, none, ascending.
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* @param $title the link text.
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* @param $defaultreverse whether the default sort order for this column is descending, rather than ascending.
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* @return string HTML fragment.
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*/
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protected function make_sort_link($sort, $title, $tip, $defaultreverse = false) {
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$currentsort = $this->qbank->get_primary_sort_order($sort);
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$newsortreverse = $defaultreverse;
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if ($currentsort) {
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$newsortreverse = $currentsort > 0;
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}
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if (!$tip) {
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$tip = $title;
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}
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if ($newsortreverse) {
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$tip = get_string('sortbyxreverse', '', $tip);
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} else {
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$tip = get_string('sortbyx', '', $tip);
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}
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$link = '<a href="' . $this->qbank->new_sort_url($sort, $newsortreverse) . '" title="' . $tip . '">';
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$link .= $title;
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if ($currentsort) {
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$link .= $this->get_sort_icon($currentsort < 0);
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}
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$link .= '</a>';
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return $link;
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}
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/**
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* Get an icon representing the corrent sort state.
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* @param $reverse sort is descending, not ascending.
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* @return string HTML image tag.
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*/
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protected function get_sort_icon($reverse) {
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global $CFG;
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if ($reverse) {
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return ' <img src="' . $CFG->pixpath . '/t/up.gif" alt="' . get_string('desc') . '" />';
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} else {
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return ' <img src="' . $CFG->pixpath . '/t/down.gif" alt="' . get_string('asc') . '" />';
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}
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}
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/**
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* Output this column.
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* @param object $question the row from the $question table, augmented with extra information.
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* @param string $rowclasses CSS class names that should be applied to this row of output.
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*/
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public function display($question, $rowclasses) {
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$this->display_start($question, $rowclasses);
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$this->display_content($question, $rowclasses);
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$this->display_end($question, $rowclasses);
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}
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protected function display_start($question, $rowclasses) {
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echo '<td class="' . $this->get_classes() . '">';
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}
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/**
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* @return string the CSS classes to apply to every cell in this column.
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*/
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protected function get_classes() {
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$classes = $this->get_extra_classes();
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$classes[] = $this->get_name();
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return implode(' ', $classes);
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}
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/**
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* @param object $question the row from the $question table, augmented with extra information.
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* @return string internal name for this column. Used as a CSS class name,
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* and to store information about the current sort. Must match PARAM_ALPHA.
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*/
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abstract public function get_name();
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/**
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* @return array any extra class names you would like applied to every cell in this column.
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*/
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public function get_extra_classes() {
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return array();
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}
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/**
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* Output the contents of this column.
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* @param object $question the row from the $question table, augmented with extra information.
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* @param string $rowclasses CSS class names that should be applied to this row of output.
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*/
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abstract protected function display_content($question, $rowclasses);
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protected function display_end($question, $rowclasses) {
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echo "</td>\n";
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}
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/**
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* Return an array 'table_alias' => 'JOIN clause' to bring in any data that
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* this column required.
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*
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* The return values for all the columns will be checked. It is OK if two
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* columns join in the same table with the same alias and identical JOIN clauses.
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* If to columns try to use the same alias with different joins, you get an error.
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* The only table included by default is the question table, which is aliased to 'q'.
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*
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* It is importnat that your join simply adds additional data (or NULLs) to the
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* existing rows of the query. It must not cause additional rows.
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*
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* @return array 'table_alias' => 'JOIN clause'
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*/
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public function get_extra_joins() {
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return array();
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}
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/**
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* @return array fields required. use table alias 'q' for the question table, or one of the
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* ones from get_extra_joins. Every field requested must specify a table prefix.
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*/
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public function get_required_fields() {
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return array();
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}
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/**
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* Can this column be sorted on? You can return either:
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* + false for no (the default),
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* + a field name, if sorting this column corresponds to sorting on that datbase field.
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* + an array of subnames to sort on as follows
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* return array(
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* 'firstname' => array('field' => 'uc.firstname', 'title' => get_string('firstname')),
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* 'lastname' => array('field' => 'uc.lastname', 'field' => get_string('lastname')),
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* );
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* As well as field, and field, you can also add 'revers' => 1 if you want the default sort
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* order to be DESC.
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* @return mixed as above.
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*/
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public function is_sortable() {
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return false;
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}
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/**
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* Helper method for building sort clauses.
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* @param boolean $reverse whether the normal direction should be reversed.
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* @param string $normaldir 'ASC' or 'DESC'
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* @return string 'ASC' or 'DESC'
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*/
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protected function sortorder($reverse) {
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if ($reverse) {
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return ' DESC';
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} else {
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return ' ASC';
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}
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}
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/**
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* @param $reverse Whether to sort in the reverse of the default sort order.
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* @param $subsort if is_sortable returns an array of subnames, then this will be
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* one of those. Otherwise will be empty.
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* @return string some SQL to go in the order by clause.
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*/
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public function sort_expression($reverse, $subsort) {
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$sortable = $this->is_sortable();
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if (is_array($sortable)) {
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if (array_key_exists($subsort, $sortable)) {
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return $sortable[$subsort]['field'] . $this->sortorder($reverse, !empty($sortable[$subsort]['reverse']));
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} else {
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throw new coding_exception('Unexpected $subsort type: ' . $subsort);
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}
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} else if ($sortable) {
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return $sortable . $this->sortorder($reverse);
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} else {
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throw new coding_exception('sort_expression called on a non-sortable column.');
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}
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}
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}
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/**
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* A column with a checkbox for each question with name q{questionid}.
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*/
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class question_bank_checkbox_column extends question_bank_column_base {
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protected $strselect;
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public function init() {
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$this->strselect = get_string('select', 'quiz');
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}
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public function get_name() {
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return 'checkbox';
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}
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protected function get_title() {
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return '<input type="checkbox" disabled="disabled" id="qbheadercheckbox" />';
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}
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protected function get_title_tip() {
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return get_string('selectquestionsforbulk', 'question');
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}
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protected function display_content($question, $rowclasses) {
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echo '<input title="' . $this->strselect . '" type="checkbox" name="q' .
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$question->id . '" id="checkq' . $question->id . '" value="1"/>';
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print_js_call('question_bank.init_checkbox_column', array(get_string('selectall'),
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get_string('deselectall'), 'checkq' . $question->id));
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}
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public function get_required_fields() {
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return array('q.id');
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}
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}
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/**
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* A column type for the name of the question type.
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*/
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class question_bank_question_type_column extends question_bank_column_base {
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public function get_name() {
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return 'qtype';
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}
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protected function get_title() {
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return get_string('qtypeveryshort', 'question');
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}
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protected function get_title_tip() {
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return get_string('questiontype', 'question');
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}
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protected function display_content($question, $rowclasses) {
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echo print_question_icon($question);
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}
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public function get_required_fields() {
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return array('q.qtype');
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}
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public function is_sortable() {
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return 'q.qtype';
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}
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}
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/**
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* A column type for the name of the question name.
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*/
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class question_bank_question_name_column extends question_bank_column_base {
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protected $checkboxespresent = null;
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public function get_name() {
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return 'questionname';
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}
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protected function get_title() {
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return get_string('question');
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}
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protected function label_for($question) {
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if (is_null($this->checkboxespresent)) {
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$this->checkboxespresent = $this->qbank->has_column('checkbox');
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}
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if ($this->checkboxespresent) {
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return 'checkq' . $question->id;
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} else {
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return '';
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}
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}
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protected function display_content($question, $rowclasses) {
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$labelfor = $this->label_for($question);
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if ($labelfor) {
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echo '<label for="' . $labelfor . '">';
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}
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echo format_string($question->name);
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if ($labelfor) {
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echo '</label>';
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}
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}
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public function get_required_fields() {
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return array('q.id', 'q.name');
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}
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public function is_sortable() {
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return 'q.name';
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}
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}
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/**
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* A column type for the name of the question creator.
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*/
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class question_bank_creator_name_column extends question_bank_column_base {
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public function get_name() {
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return 'creatorname';
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}
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protected function get_title() {
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return get_string('createdby', 'question');
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}
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protected function display_content($question, $rowclasses) {
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if (!empty($question->creatorfirstname) && !empty($question->creatorlastname)) {
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$u = new stdClass;
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$u->firstname = $question->creatorfirstname;
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$u->lastname = $question->creatorlastname;
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echo fullname($u);
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}
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}
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public function get_extra_joins() {
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return array('uc' => 'LEFT JOIN {user} uc ON uc.id = q.createdby');
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}
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public function get_required_fields() {
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return array('uc.firstname AS creatorfirstname', 'uc.lastname AS creatorlastname');
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}
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public function is_sortable() {
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return array(
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'firstname' => array('field' => 'uc.firstname', 'title' => get_string('firstname')),
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'lastname' => array('field' => 'uc.lastname', 'title' => get_string('lastname')),
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);
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}
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}
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/**
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* A column type for the name of the question last modifier.
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*/
|
|
class question_bank_modifier_name_column extends question_bank_column_base {
|
|
public function get_name() {
|
|
return 'modifiername';
|
|
}
|
|
|
|
protected function get_title() {
|
|
return get_string('lastmodifiedby', 'question');
|
|
}
|
|
|
|
protected function display_content($question, $rowclasses) {
|
|
if (!empty($question->modifierfirstname) && !empty($question->modifierlastname)) {
|
|
$u = new stdClass;
|
|
$u->firstname = $question->modifierfirstname;
|
|
$u->lastname = $question->modifierlastname;
|
|
echo fullname($u);
|
|
}
|
|
}
|
|
|
|
public function get_extra_joins() {
|
|
return array('um' => 'LEFT JOIN {user} um ON um.id = q.modifiedby');
|
|
}
|
|
|
|
public function get_required_fields() {
|
|
return array('um.firstname AS modifierfirstname', 'um.lastname AS modifierlastname');
|
|
}
|
|
|
|
public function is_sortable() {
|
|
return array(
|
|
'firstname' => array('field' => 'um.firstname', 'title' => get_string('firstname')),
|
|
'lastname' => array('field' => 'um.lastname', 'title' => get_string('lastname')),
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A base class for actions that are an icon that lets you manipulate the question in some way.
|
|
*/
|
|
abstract class question_bank_action_column_base extends question_bank_column_base {
|
|
|
|
protected function get_title() {
|
|
return ' ';
|
|
}
|
|
|
|
public function get_extra_classes() {
|
|
return array('iconcol');
|
|
}
|
|
|
|
protected function print_icon($icon, $title, $url) {
|
|
global $CFG;
|
|
echo '<a title="' . $title . '" href="' . $url . '">
|
|
<img src="' . $CFG->pixpath . '/' . $icon . '" class="iconsmall" alt="' . $title . '" /></a>';
|
|
}
|
|
|
|
public function get_required_fields() {
|
|
return array('q.id');
|
|
}
|
|
}
|
|
|
|
class question_bank_edit_action_column extends question_bank_action_column_base {
|
|
protected $stredit;
|
|
protected $strview;
|
|
|
|
public function init() {
|
|
parent::init();
|
|
$this->stredit = get_string('edit');
|
|
$this->strview = get_string('view');
|
|
}
|
|
|
|
public function get_name() {
|
|
return 'editaction';
|
|
}
|
|
|
|
protected function display_content($question, $rowclasses) {
|
|
if (question_has_capability_on($question, 'edit') ||
|
|
question_has_capability_on($question, 'move')) {
|
|
$this->print_icon('t/edit.gif', $this->stredit, $this->qbank->edit_question_url($question->id));
|
|
} else {
|
|
$this->print_icon('i/info.gif', $this->strview, $this->qbank->edit_question_url($question->id));
|
|
}
|
|
}
|
|
}
|
|
|
|
class question_bank_preview_action_column extends question_bank_action_column_base {
|
|
protected $strpreview;
|
|
|
|
public function init() {
|
|
parent::init();
|
|
$this->strpreview = get_string('preview');
|
|
}
|
|
|
|
public function get_name() {
|
|
return 'previewaction';
|
|
}
|
|
|
|
protected function display_content($question, $rowclasses) {
|
|
global $CFG;
|
|
if (question_has_capability_on($question, 'use')) {
|
|
link_to_popup_window($this->qbank->preview_question_url($question->id), 'questionpreview',
|
|
' <img src="' . $CFG->pixpath . '/t/preview.gif" class="iconsmall" alt="' . $this->strpreview . '" />',
|
|
0, 0, $this->strpreview, QUESTION_PREVIEW_POPUP_OPTIONS);
|
|
}
|
|
}
|
|
|
|
public function get_required_fields() {
|
|
return array('q.id');
|
|
}
|
|
}
|
|
|
|
class question_bank_move_action_column extends question_bank_action_column_base {
|
|
protected $strmove;
|
|
|
|
public function init() {
|
|
parent::init();
|
|
$this->strmove = get_string('move');
|
|
}
|
|
|
|
public function get_name() {
|
|
return 'moveaction';
|
|
}
|
|
|
|
protected function display_content($question, $rowclasses) {
|
|
if (question_has_capability_on($question, 'move')) {
|
|
$this->print_icon('move', $this->strmove, $this->qbank->move_question_url($question->id));
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* action to delete (or hide) a question, or restore a previously hidden question.
|
|
*/
|
|
class question_bank_delete_action_column extends question_bank_action_column_base {
|
|
protected $strdelete;
|
|
protected $strrestore;
|
|
|
|
public function init() {
|
|
parent::init();
|
|
$this->strdelete = get_string('delete');
|
|
$this->strrestore = get_string('restore');
|
|
}
|
|
|
|
public function get_name() {
|
|
return 'deleteaction';
|
|
}
|
|
|
|
protected function display_content($question, $rowclasses) {
|
|
if (question_has_capability_on($question, 'edit')) {
|
|
if ($question->hidden) {
|
|
$this->print_icon('restore', $this->strrestore, $this->qbank->base_url()->out(false, array('unhide' => $question->id)));
|
|
} else {
|
|
$this->print_icon('delete', $this->strdelete,
|
|
$this->qbank->base_url()->out(false, array('deleteselected' => $question->id, 'q' . $question->id => 1)));
|
|
}
|
|
}
|
|
}
|
|
|
|
public function get_required_fields() {
|
|
return array('q.id', 'q.hidden');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Base class for 'columns' that are actually displayed as a row following the main question row.
|
|
*/
|
|
abstract class question_bank_row_base extends question_bank_column_base {
|
|
public function is_extra_row() {
|
|
return true;
|
|
}
|
|
|
|
protected function display_start($question, $rowclasses) {
|
|
if ($rowclasses) {
|
|
echo '<tr class="' . $rowclasses . '">' . "\n";
|
|
} else {
|
|
echo "<tr>\n";
|
|
}
|
|
echo '<td colspan="' . $this->qbank->get_column_count() . '" class="' . $this->get_name() . '">';
|
|
}
|
|
|
|
protected function display_end($question, $rowclasses) {
|
|
echo "</td></tr>\n";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A column type for the name of the question name.
|
|
*/
|
|
class question_bank_question_text_row extends question_bank_row_base {
|
|
protected $formatoptions;
|
|
|
|
protected function init() {
|
|
$this->formatoptions = new stdClass;
|
|
$this->formatoptions->noclean = true;
|
|
$this->formatoptions->para = false;
|
|
}
|
|
|
|
public function get_name() {
|
|
return 'questiontext';
|
|
}
|
|
|
|
protected function get_title() {
|
|
return get_string('questiontext', 'question');
|
|
}
|
|
|
|
protected function display_content($question, $rowclasses) {
|
|
$text = format_text($question->questiontext, $question->questiontextformat,
|
|
$this->formatoptions, $this->qbank->get_courseid());
|
|
if ($text == '') {
|
|
$text = ' ';
|
|
}
|
|
echo $text;
|
|
}
|
|
|
|
public function get_required_fields() {
|
|
return array('q.questiontext', 'q.questiontextformat');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This class prints a view of the question bank, including
|
|
* + Some controls to allow users to to select what is displayed.
|
|
* + A list of questions as a table.
|
|
* + Further controls to do things with the questions.
|
|
*
|
|
* This class gives a basic view, and provides plenty of hooks where subclasses
|
|
* can override parts of the display.
|
|
*
|
|
* The list of questions presented as a table is generated by creating a list of
|
|
* question_bank_column objects, one for each 'column' to be displayed. These
|
|
* manage
|
|
* + outputting the contents of that column, given a $question object, but also
|
|
* + generating the right fragments of SQL to ensure the necessary data is present,
|
|
* and sorted in the right order.
|
|
* + outputting table headers.
|
|
*/
|
|
class question_bank_view {
|
|
const MAX_SORTS = 3;
|
|
|
|
protected $baseurl;
|
|
protected $editquestionurl;
|
|
protected $quizorcourseid;
|
|
protected $contexts;
|
|
protected $cm;
|
|
protected $course;
|
|
protected $knowncolumntypes;
|
|
protected $visiblecolumns;
|
|
protected $extrarows;
|
|
protected $requiredcolumns;
|
|
protected $sort;
|
|
protected $countsql;
|
|
protected $loadsql;
|
|
protected $sqlparams;
|
|
|
|
public function __construct($contexts, $pageurl, $course, $cm = null) {
|
|
global $CFG;
|
|
|
|
$this->contexts = $contexts;
|
|
$this->baseurl = $pageurl;
|
|
$this->course = $course;
|
|
$this->cm = $cm;
|
|
|
|
if (!empty($cm) && $cm->modname == 'quiz') {
|
|
$this->quizorcourseid = '&quizid=' . $cm->instance;
|
|
} else {
|
|
$this->quizorcourseid = '&courseid=' .$this->course->id;
|
|
}
|
|
|
|
// Create the url of the new question page to forward to.
|
|
$this->editquestionurl = new moodle_url("$CFG->wwwroot/question/question.php",
|
|
array('returnurl' => $pageurl->out()));
|
|
if ($cm !== null){
|
|
$this->editquestionurl->param('cmid', $cm->id);
|
|
} else {
|
|
$this->editquestionurl->param('courseid', $this->course->id);
|
|
}
|
|
|
|
$this->init_column_types();
|
|
$this->init_columns($this->wanted_columns());
|
|
$this->init_sort();
|
|
}
|
|
|
|
protected function wanted_columns() {
|
|
$columns = array('checkbox', 'qtype', 'questionname', 'creatorname',
|
|
'modifiername', 'editaction', 'previewaction', 'moveaction', 'deleteaction');
|
|
if (optional_param('qbshowtext', false, PARAM_BOOL)) {
|
|
$columns[] = 'questiontext';
|
|
}
|
|
return $columns;
|
|
}
|
|
|
|
protected function know_field_types() {
|
|
return array(
|
|
new question_bank_checkbox_column($this),
|
|
new question_bank_question_type_column($this),
|
|
new question_bank_question_name_column($this),
|
|
new question_bank_creator_name_column($this),
|
|
new question_bank_modifier_name_column($this),
|
|
new question_bank_edit_action_column($this),
|
|
new question_bank_preview_action_column($this),
|
|
new question_bank_move_action_column($this),
|
|
new question_bank_delete_action_column($this),
|
|
new question_bank_question_text_row($this),
|
|
);
|
|
}
|
|
|
|
protected function init_column_types() {
|
|
$this->knowncolumntypes = array();
|
|
foreach ($this->know_field_types() as $col) {
|
|
$this->knowncolumntypes[$col->get_name()] = $col;
|
|
}
|
|
}
|
|
|
|
protected function init_columns($wanted) {
|
|
$this->visiblecolumns = array();
|
|
$this->extrarows = array();
|
|
foreach ($wanted as $colname) {
|
|
if (!isset($this->knowncolumntypes[$colname])) {
|
|
throw new coding_exception('Unknown column type ' . $colname . ' requested in init columns.');
|
|
}
|
|
$column = $this->knowncolumntypes[$colname];
|
|
if ($column->is_extra_row()) {
|
|
$this->extrarows[$colname] = $column;
|
|
} else {
|
|
$this->visiblecolumns[$colname] = $column;
|
|
}
|
|
}
|
|
$this->requiredcolumns = array_merge($this->visiblecolumns, $this->extrarows);
|
|
}
|
|
|
|
/**
|
|
* @param string $colname a column internal name.
|
|
* @return boolean is this column included in the output?
|
|
*/
|
|
public function has_column($colname) {
|
|
return isset($this->visiblecolumns[$colname]);
|
|
}
|
|
|
|
/**
|
|
* @return integer The number of columns in the table.
|
|
*/
|
|
public function get_column_count() {
|
|
return count($this->visiblecolumns);
|
|
}
|
|
|
|
public function get_courseid() {
|
|
return $this->course->id;
|
|
}
|
|
|
|
protected function init_sort() {
|
|
$this->init_sort_from_params();
|
|
if (empty($this->sort)) {
|
|
$this->sort = $this->default_sort();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Deal with a sort name of the forum columnname, or colname_subsort by
|
|
* breaking it up, validating the bits that are presend, and returning them.
|
|
* If there is no subsort, then $subsort is returned as ''.
|
|
* @return array array($colname, $subsort).
|
|
*/
|
|
protected function parse_subsort($sort) {
|
|
/// Do the parsing.
|
|
if (strpos($sort, '_') !== false) {
|
|
list($colname, $subsort) = explode('_', $sort, 2);
|
|
} else {
|
|
$colname = $sort;
|
|
$subsort = '';
|
|
}
|
|
/// Validate the column name.
|
|
if (!isset($this->knowncolumntypes[$colname]) || !$this->knowncolumntypes[$colname]->is_sortable()) {
|
|
for ($i = 1; $i <= question_bank_view::MAX_SORTS; $i++) {
|
|
$this->baseurl->remove_params('qbs' . $i);
|
|
}
|
|
throw new moodle_exception('unknownsortcolumn', '', $link = $this->baseurl->out(), $colname);
|
|
}
|
|
/// Validate the subsort, if present.
|
|
if ($subsort) {
|
|
$subsorts = $this->knowncolumntypes[$colname]->is_sortable();
|
|
if (!is_array($subsorts) || !isset($subsorts[$subsort])) {
|
|
throw new moodle_exception('unknownsortcolumn', '', $link = $this->baseurl->out(), $sort);
|
|
}
|
|
}
|
|
return array($colname, $subsort);
|
|
}
|
|
|
|
protected function init_sort_from_params() {
|
|
$this->sort = array();
|
|
for ($i = 1; $i <= question_bank_view::MAX_SORTS; $i++) {
|
|
if (!$sort = optional_param('qbs' . $i, '', PARAM_ALPHAEXT)) {
|
|
break;
|
|
}
|
|
// Work out the appropriate order.
|
|
$order = 1;
|
|
if ($sort[0] == '-') {
|
|
$order = -1;
|
|
$sort = substr($sort, 1);
|
|
if (!$sort) {
|
|
break;
|
|
}
|
|
}
|
|
// Deal with subsorts.
|
|
list($colname, $subsort) = $this->parse_subsort($sort);
|
|
$this->requiredcolumns[$colname] = $this->knowncolumntypes[$colname];
|
|
$this->sort[$sort] = $order;
|
|
}
|
|
}
|
|
|
|
protected function sort_to_params($sorts) {
|
|
$params = array();
|
|
$i = 0;
|
|
foreach ($sorts as $sort => $order) {
|
|
$i += 1;
|
|
if ($order < 0) {
|
|
$sort = '-' . $sort;
|
|
}
|
|
$params['qbs' . $i] = $sort;
|
|
}
|
|
return $params;
|
|
}
|
|
|
|
protected function default_sort() {
|
|
return array('qtype' => 1, 'questionname' => 1);
|
|
}
|
|
|
|
/**
|
|
* @param $sort a column or column_subsort name.
|
|
* @return integer the current sort order for this column -1, 0, 1
|
|
*/
|
|
public function get_primary_sort_order($sort) {
|
|
$order = reset($this->sort);
|
|
$primarysort = key($this->sort);
|
|
if ($sort == $primarysort) {
|
|
return $order;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get a URL to redisplay the page with a new sort for the question bank.
|
|
* @param string $sort the column, or column_subsort to sort on.
|
|
* @param boolean $newsortreverse whether to sort in reverse order.
|
|
* @return string The new URL.
|
|
*/
|
|
public function new_sort_url($sort, $newsortreverse) {
|
|
if ($newsortreverse) {
|
|
$order = -1;
|
|
} else {
|
|
$order = 1;
|
|
}
|
|
// Tricky code to add the new sort at the start, removing it from where it was before, if it was present.
|
|
$newsort = array_reverse($this->sort);
|
|
if (isset($newsort[$sort])) {
|
|
unset($newsort[$sort]);
|
|
}
|
|
$newsort[$sort] = $order;
|
|
$newsort = array_reverse($newsort);
|
|
if (count($newsort) > question_bank_view::MAX_SORTS) {
|
|
$newsort = array_slice($newsort, 0, question_bank_view::MAX_SORTS, true);
|
|
}
|
|
return $this->baseurl->out(false, $this->sort_to_params($newsort));
|
|
}
|
|
|
|
protected function build_query_sql($category, $recurse, $showhidden) {
|
|
global $DB;
|
|
|
|
/// Get the required tables.
|
|
$joins = array();
|
|
foreach ($this->requiredcolumns as $column) {
|
|
$extrajoins = $column->get_extra_joins();
|
|
foreach ($extrajoins as $prefix => $join) {
|
|
if (isset($joins[$prefix]) && $joins[$prefix] != $join) {
|
|
throw new coding_exception('Join ' . $join . ' conflicts with previous join ' . $joins[$prefix]);
|
|
}
|
|
$joins[$prefix] = $join;
|
|
}
|
|
}
|
|
|
|
/// Get the required fields.
|
|
$fields = array('q.hidden', 'q.category');
|
|
foreach ($this->visiblecolumns as $column) {
|
|
$fields = array_merge($fields, $column->get_required_fields());
|
|
}
|
|
foreach ($this->extrarows as $row) {
|
|
$fields = array_merge($fields, $row->get_required_fields());
|
|
}
|
|
$fields = array_unique($fields);
|
|
|
|
/// Build the order by clause.
|
|
$sorts = array();
|
|
foreach ($this->sort as $sort => $order) {
|
|
list($colname, $subsort) = $this->parse_subsort($sort);
|
|
$sorts[] = $this->knowncolumntypes[$colname]->sort_expression($order < 0, $subsort);
|
|
}
|
|
|
|
/// Build the where clause.
|
|
$tests = array('parent = 0');
|
|
|
|
if ($showhidden) {
|
|
$tests[] = 'hidden = 0';
|
|
}
|
|
|
|
if ($recurse) {
|
|
$categoryids = explode(',', question_categorylist($category->id));
|
|
} else {
|
|
$categoryids = array($category->id);
|
|
}
|
|
list($catidtest, $params) = $DB->get_in_or_equal($categoryids, SQL_PARAMS_NAMED, 'cat0000');
|
|
$tests[] = 'q.category ' . $catidtest;
|
|
$this->sqlparams = $params;
|
|
|
|
/// Build the SQL.
|
|
$sql = ' FROM {question} q ' . implode(' ', $joins);
|
|
$sql .= ' WHERE ' . implode(' AND ', $tests);
|
|
$this->countsql = 'SELECT count(1)' . $sql;
|
|
$this->loadsql = 'SELECT ' . implode(', ', $fields) . $sql . ' ORDER BY ' . implode(', ', $sorts);
|
|
$this->sqlparams = $params;
|
|
}
|
|
|
|
protected function get_question_count() {
|
|
global $DB;
|
|
return $DB->count_records_sql($this->countsql, $this->sqlparams);
|
|
}
|
|
|
|
protected function load_page_questions($page, $perpage) {
|
|
global $DB;
|
|
$questions = $DB->get_recordset_sql($this->loadsql, $this->sqlparams, $page*$perpage, $perpage);
|
|
if (!$questions->valid()) {
|
|
/// No questions on this page. Reset to page 0.
|
|
$questions = $DB->get_recordset_sql($this->loadsql, $this->sqlparams, 0, $perpage);
|
|
}
|
|
return $questions;
|
|
}
|
|
|
|
public function base_url() {
|
|
return $this->baseurl;
|
|
}
|
|
|
|
public function edit_question_url($questionid) {
|
|
return $this->editquestionurl->out(false, array('id' => $questionid));
|
|
}
|
|
|
|
public function move_question_url($questionid) {
|
|
return $this->editquestionurl->out(false, array('id' => $questionid, 'movecontext' => 1));
|
|
}
|
|
|
|
public function preview_question_url($questionid) {
|
|
global $CFG;
|
|
return $CFG->wwwroot . '/question/preview.php?id=' . $questionid . '&course=' . $this->course->id;
|
|
}
|
|
|
|
/**
|
|
* Shows the question bank editing interface.
|
|
*
|
|
* The function also processes a number of actions:
|
|
*
|
|
* Actions affecting the question pool:
|
|
* move Moves a question to a different category
|
|
* deleteselected Deletes the selected questions from the category
|
|
* Other actions:
|
|
* category Chooses the category
|
|
* displayoptions Sets display options
|
|
*/
|
|
public function display($tabname, $page, $perpage, $sortorder,
|
|
$sortorderdecoded, $cat, $recurse, $showhidden, $showquestiontext){
|
|
|
|
if ($this->process_actions_needing_ui()) {
|
|
return;
|
|
}
|
|
|
|
// Category selection form
|
|
print_heading(get_string('questionbank', 'question'), '', 2);
|
|
|
|
$this->display_category_form($this->contexts->having_one_edit_tab_cap($tabname),
|
|
$this->baseurl, $cat);
|
|
$this->display_options($recurse, $showhidden, $showquestiontext);
|
|
|
|
if (!$category = $this->get_current_category($cat)) {
|
|
return;
|
|
}
|
|
$this->print_category_info($category);
|
|
|
|
// continues with list of questions
|
|
$this->display_question_list($this->contexts->having_one_edit_tab_cap($tabname), $this->baseurl, $cat, $this->cm,
|
|
$recurse, $page, $perpage, $showhidden, $sortorder, $sortorderdecoded, $showquestiontext,
|
|
$this->contexts->having_cap('moodle/question:add'));
|
|
}
|
|
|
|
protected function print_choose_category_message($categoryandcontext) {
|
|
echo "<p style=\"text-align:center;\"><b>";
|
|
print_string("selectcategoryabove", "quiz");
|
|
echo "</b></p>";
|
|
}
|
|
|
|
protected function get_current_category($categoryandcontext) {
|
|
global $DB;
|
|
list($categoryid, $contextid) = explode(',', $categoryandcontext);
|
|
if (!$categoryid) {
|
|
$this->print_choose_category_message($categoryandcontext);
|
|
return false;
|
|
}
|
|
|
|
if (!$category = $DB->get_record('question_categories',
|
|
array('id' => $categoryid, 'contextid' => $contextid))) {
|
|
print_box_start('generalbox questionbank');
|
|
notify('Category not found!');
|
|
print_box_end();
|
|
return false;
|
|
}
|
|
|
|
return $category;
|
|
}
|
|
|
|
protected function print_category_info($category) {
|
|
$formatoptions = new stdClass;
|
|
$formatoptions->noclean = true;
|
|
echo '<div class="boxaligncenter">';
|
|
echo format_text($category->info, FORMAT_MOODLE, $formatoptions, $this->course->id);
|
|
echo "</div>\n";
|
|
}
|
|
|
|
/**
|
|
* prints a form to choose categories
|
|
*/
|
|
protected function display_category_form($contexts, $pageurl, $current) {
|
|
global $CFG;
|
|
|
|
/// Get all the existing categories now
|
|
$catmenu = question_category_options($contexts, false, 0, true);
|
|
|
|
$strcategory = get_string('selectcategory', 'quiz');
|
|
$strshow = get_string('show', 'quiz');
|
|
$streditcats = get_string('editcategories', 'quiz');
|
|
|
|
popup_form('edit.php?'.$pageurl->get_query_string().'&category=',
|
|
$catmenu, 'catmenu', $current, '', '', '', false, 'self',
|
|
$strcategory);
|
|
}
|
|
|
|
protected function display_options($recurse = 1, $showhidden = false, $showquestiontext = false) {
|
|
echo '<form method="get" action="edit.php" id="displayoptions">';
|
|
echo "<fieldset class='invisiblefieldset'>";
|
|
echo $this->baseurl->hidden_params_out(array('recurse', 'showhidden', 'showquestiontext'));
|
|
$this->display_category_form_checkbox('recurse', get_string('recurse', 'quiz'));
|
|
$this->display_category_form_checkbox('showhidden', get_string('showhidden', 'quiz'));
|
|
$this->display_category_form_checkbox('qbshowtext', get_string('showquestiontext', 'quiz'));
|
|
echo '<noscript><div class="centerpara"><input type="submit" value="'. get_string('go') .'" />';
|
|
echo '</div></noscript></fieldset></form>';
|
|
}
|
|
|
|
/**
|
|
* Print a single option checkbox. Used by the preceeding.
|
|
*/
|
|
protected function display_category_form_checkbox($name, $label) {
|
|
echo '<div><input type="hidden" id="' . $name . '_off" name="' . $name . '" value="0" />';
|
|
echo '<input type="checkbox" id="' . $name . '_on" name="' . $name . '" value="1"';
|
|
if (optional_param($name, false, PARAM_BOOL)) {
|
|
echo ' checked="checked"';
|
|
}
|
|
echo ' onchange="getElementById(\'displayoptions\').submit(); return true;" />';
|
|
echo '<label for="' . $name . '_on">' . $label . '</label>';
|
|
echo "</div>\n";
|
|
}
|
|
|
|
protected function create_new_question_form($category, $canadd) {
|
|
$qtypemenu = question_type_menu();
|
|
$straddquestions = get_string('addquestions', 'quiz');
|
|
echo '<div class="createnewquestion">';
|
|
if ($canadd) {
|
|
popup_form($this->editquestionurl->out(false, array('category' => $category->id)) . '&qtype=',
|
|
$qtypemenu, 'addquestion', '', 'choose', '', '', false, 'self', $straddquestions);
|
|
helpbutton('questiontypes', $straddquestions, 'quiz');
|
|
} else {
|
|
print_string('nopermissionadd', 'question');
|
|
}
|
|
echo '</div>';
|
|
}
|
|
|
|
/**
|
|
* Prints the table of questions in a category with interactions
|
|
*
|
|
* @param object $course The course object
|
|
* @param int $categoryid The id of the question category to be displayed
|
|
* @param int $cm The course module record if we are in the context of a particular module, 0 otherwise
|
|
* @param int $recurse This is 1 if subcategories should be included, 0 otherwise
|
|
* @param int $page The number of the page to be displayed
|
|
* @param int $perpage Number of questions to show per page
|
|
* @param boolean $showhidden True if also hidden questions should be displayed
|
|
* @param boolean $showquestiontext whether the text of each question should be shown in the list
|
|
*/
|
|
protected function display_question_list($contexts, $pageurl, $categoryandcontext,
|
|
$cm = null, $recurse=1, $page=0, $perpage=100, $showhidden=false,
|
|
$sortorder='typename', $sortorderdecoded='qtype, name ASC',
|
|
$showquestiontext = false, $addcontexts = array()) {
|
|
global $CFG, $DB;
|
|
|
|
$category = $this->get_current_category($categoryandcontext);
|
|
|
|
$cmoptions = new stdClass;
|
|
$cmoptions->hasattempts = !empty($this->quizhasattempts);
|
|
|
|
$strselectall = get_string("selectall", "quiz");
|
|
$strselectnone = get_string("selectnone", "quiz");
|
|
$strdelete = get_string("delete");
|
|
|
|
list($categoryid, $contextid) = explode(',', $categoryandcontext);
|
|
$catcontext = get_context_instance_by_id($contextid);
|
|
|
|
$canadd = has_capability('moodle/question:add', $catcontext);
|
|
$caneditall =has_capability('moodle/question:editall', $catcontext);
|
|
$canuseall =has_capability('moodle/question:useall', $catcontext);
|
|
$canmoveall =has_capability('moodle/question:moveall', $catcontext);
|
|
|
|
$this->create_new_question_form($category, $canadd);
|
|
|
|
$this->build_query_sql($category, $recurse, $showhidden);
|
|
$totalnumber = $this->get_question_count();
|
|
if ($totalnumber == 0) {
|
|
return;
|
|
}
|
|
|
|
$questions = $this->load_page_questions($page, $perpage);
|
|
|
|
echo '<div class="categorypagingbarcontainer">';
|
|
print_paging_bar($totalnumber, $page, $perpage, $pageurl, 'qpage');
|
|
echo '</div>';
|
|
|
|
echo '<form method="post" action="edit.php">';
|
|
echo '<fieldset class="invisiblefieldset" style="display: block;">';
|
|
echo '<input type="hidden" name="sesskey" value="'.sesskey().'" />';
|
|
echo $pageurl->hidden_params_out();
|
|
echo '<div class="categoryquestionscontainer">';
|
|
|
|
$this->start_table();
|
|
$rowcount = 0;
|
|
foreach ($questions as $question) {
|
|
$this->print_table_row($question, $rowcount);
|
|
$rowcount += 1;
|
|
}
|
|
$this->end_table();
|
|
|
|
echo '<div class="categorypagingbarcontainer pagingbottom">';
|
|
$paging = print_paging_bar($totalnumber, $page, $perpage, $pageurl, 'qpage', false, true);
|
|
if ($totalnumber > DEFAULT_QUESTIONS_PER_PAGE) {
|
|
if ($perpage == DEFAULT_QUESTIONS_PER_PAGE) {
|
|
$showall = '<a href="edit.php?'.$pageurl->get_query_string(array('qperpage'=>1000)).'">'.get_string('showall', 'moodle', $totalnumber).'</a>';
|
|
} else {
|
|
$showall = '<a href="edit.php?'.$pageurl->get_query_string(array('qperpage'=>DEFAULT_QUESTIONS_PER_PAGE)).'">'.get_string('showperpage', 'moodle', DEFAULT_QUESTIONS_PER_PAGE).'</a>';
|
|
}
|
|
if ($paging) {
|
|
$paging = substr($paging, 0, strrpos($paging, '</div>'));
|
|
$paging .= "<br />$showall</div>";
|
|
} else {
|
|
$paging = "<div class='paging'>$showall</div>";
|
|
}
|
|
}
|
|
echo $paging;
|
|
echo '</div>';
|
|
|
|
echo '<div class="modulespecificbuttonscontainer">';
|
|
if ($caneditall || $canmoveall || $canuseall){
|
|
echo '<strong> '.get_string('withselected', 'quiz').':</strong><br />';
|
|
|
|
if (function_exists('module_specific_buttons')) {
|
|
echo module_specific_buttons($this->cm->id,$cmoptions);
|
|
}
|
|
|
|
// print delete and move selected question
|
|
if ($caneditall) {
|
|
echo '<input type="submit" name="deleteselected" value="' . $strdelete . "\" />\n";
|
|
}
|
|
|
|
if ($canmoveall && count($addcontexts)) {
|
|
echo '<input type="submit" name="move" value="'.get_string('moveto', 'quiz')."\" />\n";
|
|
question_category_select_menu($addcontexts, false, 0, "$category->id,$category->contextid");
|
|
}
|
|
|
|
if (function_exists('module_specific_controls') && $canuseall) {
|
|
$modulespecific = module_specific_controls($totalnumber, $recurse, $category, $this->cm->id,$cmoptions);
|
|
if(!empty($modulespecific)){
|
|
echo "<hr />$modulespecific";
|
|
}
|
|
}
|
|
}
|
|
echo "</div>\n";
|
|
|
|
echo '</fieldset>';
|
|
echo "</form>\n";
|
|
}
|
|
|
|
protected function start_table() {
|
|
echo '<table id="categoryquestions">' . "\n";
|
|
echo "<thead>\n";
|
|
$this->print_table_headers();
|
|
echo "</thead>\n";
|
|
echo "<tbody>\n";
|
|
}
|
|
|
|
protected function end_table() {
|
|
echo "</tbody>\n";
|
|
echo "</table>\n";
|
|
}
|
|
|
|
protected function print_table_headers() {
|
|
echo "<tr>\n";
|
|
foreach ($this->visiblecolumns as $column) {
|
|
$column->display_header();
|
|
}
|
|
echo "</tr>\n";
|
|
}
|
|
|
|
protected function get_row_classes($question, $rowcount) {
|
|
$classes = array();
|
|
if ($question->hidden) {
|
|
$classes[] = 'dimmed_text';
|
|
}
|
|
if (!empty($this->extrarows)) {
|
|
$classes[] = 'r' . ($rowcount % 2);
|
|
}
|
|
return $classes;
|
|
}
|
|
|
|
protected function print_table_row($question, $rowcount) {
|
|
$rowclasses = implode(' ', $this->get_row_classes($question, $rowcount));
|
|
if ($rowclasses) {
|
|
echo '<tr class="' . $rowclasses . '">' . "\n";
|
|
} else {
|
|
echo "<tr>\n";
|
|
}
|
|
foreach ($this->visiblecolumns as $column) {
|
|
$column->display($question, $rowclasses);
|
|
}
|
|
echo "</tr>\n";
|
|
foreach ($this->extrarows as $row) {
|
|
$row->display($question, $rowclasses);
|
|
}
|
|
}
|
|
|
|
public function process_actions() {
|
|
global $CFG, $DB;
|
|
/// Now, check for commands on this page and modify variables as necessary
|
|
if (optional_param('move', false, PARAM_BOOL) and confirm_sesskey()) { /// Move selected questions to new category
|
|
$category = required_param('category', PARAM_SEQUENCE);
|
|
list($tocategoryid, $contextid) = explode(',', $category);
|
|
if (! $tocategory = $DB->get_record('question_categories', array('id' => $tocategoryid, 'contextid' => $contextid))) {
|
|
print_error('cannotfindcate', 'question');
|
|
}
|
|
$tocontext = get_context_instance_by_id($contextid);
|
|
require_capability('moodle/question:add', $tocontext);
|
|
$rawdata = (array) data_submitted();
|
|
$questionids = array();
|
|
foreach ($rawdata as $key => $value) { // Parse input for question ids
|
|
if (preg_match('!^q([0-9]+)$!', $key, $matches)) {
|
|
$key = $matches[1];
|
|
$questionids[] = $key;
|
|
}
|
|
}
|
|
if ($questionids){
|
|
list($usql, $params) = $DB->get_in_or_equal($questionids);
|
|
$sql = "SELECT q.*, c.contextid FROM {question} q, {question_categories} c WHERE q.id $usql AND c.id = q.category";
|
|
if (!$questions = $DB->get_records_sql($sql, $params)){
|
|
print_error('questiondoesnotexist', 'question', $pageurl->out());
|
|
}
|
|
$checkforfiles = false;
|
|
foreach ($questions as $question){
|
|
//check capabilities
|
|
question_require_capability_on($question, 'move');
|
|
$fromcontext = get_context_instance_by_id($question->contextid);
|
|
if (get_filesdir_from_context($fromcontext) != get_filesdir_from_context($tocontext)){
|
|
$checkforfiles = true;
|
|
}
|
|
}
|
|
$returnurl = $pageurl->out(false, array('category'=>"$tocategoryid,$contextid"));
|
|
if (!$checkforfiles){
|
|
if (!question_move_questions_to_category(implode(',', $questionids), $tocategory->id)) {
|
|
print_error('errormovingquestions', 'question', $returnurl, $questionids);
|
|
}
|
|
redirect($returnurl);
|
|
} else {
|
|
$movecontexturl = new moodle_url($CFG->wwwroot.'/question/contextmoveq.php',
|
|
array('returnurl' => $returnurl,
|
|
'ids'=>$questionidlist,
|
|
'tocatid'=> $tocategoryid));
|
|
if ($cm){
|
|
$movecontexturl->param('cmid', $cm->id);
|
|
} else {
|
|
$movecontexturl->param('courseid', $this->course->id);
|
|
}
|
|
redirect($movecontexturl->out());
|
|
}
|
|
}
|
|
}
|
|
|
|
if (optional_param('deleteselected', false, PARAM_BOOL)) { // delete selected questions from the category
|
|
if (($confirm = optional_param('confirm', '', PARAM_ALPHANUM)) and confirm_sesskey()) { // teacher has already confirmed the action
|
|
$deleteselected = required_param('deleteselected');
|
|
if ($confirm == md5($deleteselected)) {
|
|
if ($questionlist = explode(',', $deleteselected)) {
|
|
// for each question either hide it if it is in use or delete it
|
|
foreach ($questionlist as $questionid) {
|
|
question_require_capability_on($questionid, 'edit');
|
|
if ($DB->record_exists('quiz_question_instances', array('question' => $questionid))) {
|
|
if (!$DB->set_field('question', 'hidden', 1, array('id' => $questionid))) {
|
|
question_require_capability_on($questionid, 'edit');
|
|
print_error('cannothidequestion', 'question');
|
|
}
|
|
} else {
|
|
delete_question($questionid);
|
|
}
|
|
}
|
|
}
|
|
redirect($pageurl->out());
|
|
} else {
|
|
print_error('invalidconfirm', 'question');
|
|
}
|
|
}
|
|
}
|
|
|
|
// Unhide a question
|
|
if(($unhide = optional_param('unhide', '', PARAM_INT)) and confirm_sesskey()) {
|
|
question_require_capability_on($unhide, 'edit');
|
|
if(!$DB->set_field('question', 'hidden', 0, array('id', $unhide))) {
|
|
print_error('cannotunhidequestion', 'question');
|
|
}
|
|
redirect($pageurl->out());
|
|
}
|
|
}
|
|
|
|
public function process_actions_needing_ui() {
|
|
global $DB;
|
|
if (optional_param('deleteselected', false, PARAM_BOOL)) {
|
|
// make a list of all the questions that are selected
|
|
$rawquestions = $_REQUEST; // This code is called by both POST forms and GET links, so cannot use data_submitted.
|
|
$questionlist = ''; // comma separated list of ids of questions to be deleted
|
|
$questionnames = ''; // string with names of questions separated by <br /> with
|
|
// an asterix in front of those that are in use
|
|
$inuse = false; // set to true if at least one of the questions is in use
|
|
foreach ($rawquestions as $key => $value) { // Parse input for question ids
|
|
if (preg_match('!^q([0-9]+)$!', $key, $matches)) {
|
|
$key = $matches[1];
|
|
$questionlist .= $key.',';
|
|
question_require_capability_on($key, 'edit');
|
|
if ($DB->record_exists('quiz_question_instances', array('question' => $key))) {
|
|
$questionnames .= '* ';
|
|
$inuse = true;
|
|
}
|
|
$questionnames .= $DB->get_field('question', 'name', array('id' => $key)) . '<br />';
|
|
}
|
|
}
|
|
if (!$questionlist) { // no questions were selected
|
|
redirect($this->baseurl->out());
|
|
}
|
|
$questionlist = rtrim($questionlist, ',');
|
|
|
|
// Add an explanation about questions in use
|
|
if ($inuse) {
|
|
$questionnames .= '<br />'.get_string('questionsinuse', 'quiz');
|
|
}
|
|
notice_yesno(get_string("deletequestionscheck", "quiz", $questionnames),
|
|
$this->baseurl->out_action(array('deleteselected'=>$questionlist, 'confirm'=>md5($questionlist))),
|
|
$this->baseurl->out_action());
|
|
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Common setup for all pages for editing questions.
|
|
* @param string $edittab code for this edit tab
|
|
* @param boolean $requirecmid require cmid? default false
|
|
* @param boolean $requirecourseid require courseid, if cmid is not given? default true
|
|
* @return array $thispageurl, $contexts, $cmid, $cm, $module, $pagevars
|
|
*/
|
|
function question_edit_setup($edittab, $requirecmid = false, $requirecourseid = true){
|
|
global $QUESTION_EDITTABCAPS, $DB;
|
|
|
|
//$thispageurl is used to construct urls for all question edit pages we link to from this page. It contains an array
|
|
//of parameters that are passed from page to page.
|
|
$thispageurl = new moodle_url();
|
|
$thispageurl->remove_params(); // We are going to explicity add back everything important - this avoids unwanted params from being retained.
|
|
|
|
if ($requirecmid){
|
|
$cmid =required_param('cmid', PARAM_INT);
|
|
} else {
|
|
$cmid = optional_param('cmid', 0, PARAM_INT);
|
|
}
|
|
if ($cmid){
|
|
list($module, $cm) = get_module_from_cmid($cmid);
|
|
$courseid = $cm->course;
|
|
$thispageurl->params(compact('cmid'));
|
|
require_login($courseid, false, $cm);
|
|
$thiscontext = get_context_instance(CONTEXT_MODULE, $cmid);
|
|
} else {
|
|
$module = null;
|
|
$cm = null;
|
|
if ($requirecourseid){
|
|
$courseid = required_param('courseid', PARAM_INT);
|
|
} else {
|
|
$courseid = optional_param('courseid', 0, PARAM_INT);
|
|
}
|
|
if ($courseid){
|
|
$thispageurl->params(compact('courseid'));
|
|
require_login($courseid, false);
|
|
$thiscontext = get_context_instance(CONTEXT_COURSE, $courseid);
|
|
} else {
|
|
$thiscontext = null;
|
|
}
|
|
}
|
|
|
|
if ($thiscontext){
|
|
$contexts = new question_edit_contexts($thiscontext);
|
|
$contexts->require_one_edit_tab_cap($edittab);
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|
|
|
} else {
|
|
$contexts = null;
|
|
}
|
|
|
|
|
|
|
|
$pagevars['qpage'] = optional_param('qpage', -1, PARAM_INT);
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|
|
|
//pass 'cat' from page to page and when 'category' comes from a drop down menu
|
|
//then we also reset the qpage so we go to page 1 of
|
|
//a new cat.
|
|
$pagevars['cat'] = optional_param('cat', 0, PARAM_SEQUENCE);// if empty will be set up later
|
|
if ($category = optional_param('category', 0, PARAM_SEQUENCE)){
|
|
if ($pagevars['cat'] != $category){ // is this a move to a new category?
|
|
$pagevars['cat'] = $category;
|
|
$pagevars['qpage'] = 0;
|
|
}
|
|
}
|
|
if ($pagevars['cat']){
|
|
$thispageurl->param('cat', $pagevars['cat']);
|
|
}
|
|
if ($pagevars['qpage'] > -1) {
|
|
$thispageurl->param('qpage', $pagevars['qpage']);
|
|
} else {
|
|
$pagevars['qpage'] = 0;
|
|
}
|
|
|
|
$pagevars['qperpage'] = optional_param('qperpage', -1, PARAM_INT);
|
|
if ($pagevars['qperpage'] > -1) {
|
|
$thispageurl->param('qperpage', $pagevars['qperpage']);
|
|
} else {
|
|
$pagevars['qperpage'] = DEFAULT_QUESTIONS_PER_PAGE;
|
|
}
|
|
|
|
$sortoptions = array('alpha' => 'name, qtype ASC',
|
|
'typealpha' => 'qtype, name ASC',
|
|
'age' => 'id ASC');
|
|
|
|
if ($sortorder = optional_param('qsortorder', '', PARAM_ALPHA)) {
|
|
$pagevars['qsortorderdecoded'] = $sortoptions[$sortorder];
|
|
$pagevars['qsortorder'] = $sortorder;
|
|
$thispageurl->param('qsortorder', $sortorder);
|
|
} else {
|
|
$pagevars['qsortorderdecoded'] = $sortoptions['typealpha'];
|
|
$pagevars['qsortorder'] = 'typealpha';
|
|
}
|
|
|
|
$defaultcategory = question_make_default_categories($contexts->all());
|
|
|
|
$contextlistarr = array();
|
|
foreach ($contexts->having_one_edit_tab_cap($edittab) as $context){
|
|
$contextlistarr[] = "'$context->id'";
|
|
}
|
|
$contextlist = join($contextlistarr, ' ,');
|
|
if (!empty($pagevars['cat'])){
|
|
$catparts = explode(',', $pagevars['cat']);
|
|
if (!$catparts[0] || (FALSE !== array_search($catparts[1], $contextlistarr)) ||
|
|
!$DB->count_records_select("question_categories", "id = ? AND contextid = ?", array($catparts[0], $catparts[1]))) {
|
|
print_error('invalidcategory', 'quiz');
|
|
}
|
|
} else {
|
|
$category = $defaultcategory;
|
|
$pagevars['cat'] = "$category->id,$category->contextid";
|
|
}
|
|
|
|
if(($recurse = optional_param('recurse', -1, PARAM_BOOL)) != -1) {
|
|
$pagevars['recurse'] = $recurse;
|
|
$thispageurl->param('recurse', $recurse);
|
|
} else {
|
|
$pagevars['recurse'] = 1;
|
|
}
|
|
|
|
if(($showhidden = optional_param('showhidden', -1, PARAM_BOOL)) != -1) {
|
|
$pagevars['showhidden'] = $showhidden;
|
|
$thispageurl->param('showhidden', $showhidden);
|
|
} else {
|
|
$pagevars['showhidden'] = 0;
|
|
}
|
|
|
|
if(($showquestiontext = optional_param('showquestiontext', -1, PARAM_BOOL)) != -1) {
|
|
$pagevars['showquestiontext'] = $showquestiontext;
|
|
$thispageurl->param('showquestiontext', $showquestiontext);
|
|
} else {
|
|
$pagevars['showquestiontext'] = 0;
|
|
}
|
|
|
|
//category list page
|
|
$pagevars['cpage'] = optional_param('cpage', 1, PARAM_INT);
|
|
if ($pagevars['cpage'] != 1){
|
|
$thispageurl->param('cpage', $pagevars['cpage']);
|
|
}
|
|
|
|
|
|
return array($thispageurl, $contexts, $cmid, $cm, $module, $pagevars);
|
|
}
|
|
class question_edit_contexts{
|
|
var $allcontexts;
|
|
/**
|
|
* @param current context
|
|
*/
|
|
function question_edit_contexts($thiscontext){
|
|
$pcontextids = get_parent_contexts($thiscontext);
|
|
$contexts = array($thiscontext);
|
|
foreach ($pcontextids as $pcontextid){
|
|
$contexts[] = get_context_instance_by_id($pcontextid);
|
|
}
|
|
$this->allcontexts = $contexts;
|
|
}
|
|
/**
|
|
* @return array all parent contexts
|
|
*/
|
|
function all(){
|
|
return $this->allcontexts;
|
|
}
|
|
/**
|
|
* @return object lowest context which must be either the module or course context
|
|
*/
|
|
function lowest(){
|
|
return $this->allcontexts[0];
|
|
}
|
|
/**
|
|
* @param string $cap capability
|
|
* @return array parent contexts having capability, zero based index
|
|
*/
|
|
function having_cap($cap){
|
|
$contextswithcap = array();
|
|
foreach ($this->allcontexts as $context){
|
|
if (has_capability($cap, $context)){
|
|
$contextswithcap[] = $context;
|
|
}
|
|
}
|
|
return $contextswithcap;
|
|
}
|
|
/**
|
|
* @param array $caps capabilities
|
|
* @return array parent contexts having at least one of $caps, zero based index
|
|
*/
|
|
function having_one_cap($caps){
|
|
$contextswithacap = array();
|
|
foreach ($this->allcontexts as $context){
|
|
foreach ($caps as $cap){
|
|
if (has_capability($cap, $context)){
|
|
$contextswithacap[] = $context;
|
|
break; //done with caps loop
|
|
}
|
|
}
|
|
}
|
|
return $contextswithacap;
|
|
}
|
|
/**
|
|
* @param string $tabname edit tab name
|
|
* @return array parent contexts having at least one of $caps, zero based index
|
|
*/
|
|
function having_one_edit_tab_cap($tabname){
|
|
global $QUESTION_EDITTABCAPS;
|
|
return $this->having_one_cap($QUESTION_EDITTABCAPS[$tabname]);
|
|
}
|
|
/**
|
|
* Has at least one parent context got the cap $cap?
|
|
*
|
|
* @param string $cap capability
|
|
* @return boolean
|
|
*/
|
|
function have_cap($cap){
|
|
return (count($this->having_cap($cap)));
|
|
}
|
|
|
|
/**
|
|
* Has at least one parent context got one of the caps $caps?
|
|
*
|
|
* @param string $cap capability
|
|
* @return boolean
|
|
*/
|
|
function have_one_cap($caps){
|
|
foreach ($caps as $cap){
|
|
if ($this->have_cap($cap)){
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
/**
|
|
* Has at least one parent context got one of the caps for actions on $tabname
|
|
*
|
|
* @param string $tabname edit tab name
|
|
* @return boolean
|
|
*/
|
|
function have_one_edit_tab_cap($tabname){
|
|
global $QUESTION_EDITTABCAPS;
|
|
return $this->have_one_cap($QUESTION_EDITTABCAPS[$tabname]);
|
|
}
|
|
/**
|
|
* Throw error if at least one parent context hasn't got the cap $cap
|
|
*
|
|
* @param string $cap capability
|
|
*/
|
|
function require_cap($cap){
|
|
if (!$this->have_cap($cap)){
|
|
print_error('nopermissions', '', '', $cap);
|
|
}
|
|
}
|
|
/**
|
|
* Throw error if at least one parent context hasn't got one of the caps $caps
|
|
*
|
|
* @param array $cap capabilities
|
|
*/
|
|
function require_one_cap($caps){
|
|
if (!$this->have_one_cap($caps)){
|
|
$capsstring = join($caps, ', ');
|
|
print_error('nopermissions', '', '', $capsstring);
|
|
}
|
|
}
|
|
/**
|
|
* Throw error if at least one parent context hasn't got one of the caps $caps
|
|
*
|
|
* @param string $tabname edit tab name
|
|
*/
|
|
function require_one_edit_tab_cap($tabname){
|
|
if (!$this->have_one_edit_tab_cap($tabname)){
|
|
print_error('nopermissions', '', '', 'access question edit tab '.$tabname);
|
|
}
|
|
}
|
|
}
|
|
|
|
//capabilities for each page of edit tab.
|
|
//this determines which contexts' categories are available. At least one
|
|
//page is displayed if user has one of the capability on at least one context
|
|
$QUESTION_EDITTABCAPS = array(
|
|
'editq' => array('moodle/question:add',
|
|
'moodle/question:editmine',
|
|
'moodle/question:editall',
|
|
'moodle/question:viewmine',
|
|
'moodle/question:viewall',
|
|
'moodle/question:usemine',
|
|
'moodle/question:useall',
|
|
'moodle/question:movemine',
|
|
'moodle/question:moveall'),
|
|
'questions'=>array('moodle/question:add',
|
|
'moodle/question:editmine',
|
|
'moodle/question:editall',
|
|
'moodle/question:viewmine',
|
|
'moodle/question:viewall',
|
|
'moodle/question:movemine',
|
|
'moodle/question:moveall'),
|
|
'categories'=>array('moodle/question:managecategory'),
|
|
'import'=>array('moodle/question:add'),
|
|
'export'=>array('moodle/question:viewall', 'moodle/question:viewmine'));
|
|
|
|
/**
|
|
* Make sure user is logged in as required in this context.
|
|
*/
|
|
function require_login_in_context($contextorid = null){
|
|
global $DB;
|
|
if (!is_object($contextorid)){
|
|
$context = get_context_instance_by_id($contextorid);
|
|
} else {
|
|
$context = $contextorid;
|
|
}
|
|
if ($context && ($context->contextlevel == CONTEXT_COURSE)) {
|
|
require_login($context->instanceid);
|
|
} else if ($context && ($context->contextlevel == CONTEXT_MODULE)) {
|
|
if ($cm = $DB->get_record('course_modules',array('id' =>$context->instanceid))) {
|
|
if (!$course = $DB->get_record('course', array('id' => $cm->course))) {
|
|
print_error('invalidcourseid');
|
|
}
|
|
require_course_login($course, true, $cm);
|
|
|
|
} else {
|
|
print_error('invalidcoursemodule');
|
|
}
|
|
} else if ($context && ($context->contextlevel == CONTEXT_SYSTEM)) {
|
|
if (!empty($CFG->forcelogin)) {
|
|
require_login();
|
|
}
|
|
|
|
} else {
|
|
require_login();
|
|
}
|
|
}
|
|
?>
|