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339ef4c246
When counting how many options to put in the add NN random questions dropdown, we should only count questions of types that are usable by random.
392 lines
17 KiB
PHP
392 lines
17 KiB
PHP
<?php // $Id$
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/**
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* Page to edit quizzes
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*
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* This page generally has two columns:
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* The right column lists all available questions in a chosen category and
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* allows them to be edited or more to be added. This column is only there if
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* the quiz does not already have student attempts
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* The left column lists all questions that have been added to the current quiz.
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* The lecturer can add questions from the right hand list to the quiz or remove them
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*
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* The script also processes a number of actions:
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* Actions affecting a quiz:
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* up and down Changes the order of questions and page breaks
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* addquestion Adds a single question to the quiz
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* add Adds several selected questions to the quiz
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* addrandom Adds a certain number of random questions to the quiz
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* repaginate Re-paginates the quiz
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* delete Removes a question from the quiz
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* savechanges Saves the order and grades for questions in the quiz
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*
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* @author Martin Dougiamas and many others. This has recently been extensively
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* rewritten by Gustav Delius and other members of the Serving Mathematics project
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* {@link http://maths.york.ac.uk/serving_maths}
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* @license http://www.gnu.org/copyleft/gpl.html GNU Public License
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* @package quiz
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*/
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require_once("../../config.php");
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require_once($CFG->dirroot.'/mod/quiz/editlib.php');
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/**
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* Callback function called from question_list() function (which is called from showbank())
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* Displays action icon as first action for each question.
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*/
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function module_specific_actions($pageurl, $questionid, $cmid, $canuse){
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global $CFG;
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if ($canuse){
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// for RTL languages: switch right and left arrows /****/
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if (right_to_left()) {
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$movearrow = 'removeright.gif';
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} else {
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$movearrow = 'moveleft.gif';
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}
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$straddtoquiz = get_string("addtoquiz", "quiz");
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$out = "<a title=\"$straddtoquiz\" href=\"edit.php?".$pageurl->get_query_string()."&addquestion=$questionid&sesskey=".sesskey()."\"><img
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src=\"$CFG->pixpath/t/$movearrow\" alt=\"$straddtoquiz\" /></a> ";
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return $out;
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} else {
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return '';
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}
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}
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/**
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* Callback function called from question_list() function (which is called from showbank())
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* Displays button in form with checkboxes for each question.
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*/
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function module_specific_buttons($cmid){
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global $THEME;
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$straddtoquiz = get_string("addtoquiz", "quiz");
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$out = "<input type=\"submit\" name=\"add\" value=\"{$THEME->larrow} $straddtoquiz\" />\n";
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return $out;
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}
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/**
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* Callback function called from question_list() function (which is called from showbank())
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*/
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function module_specific_controls($totalnumber, $recurse, $category, $cmid){
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global $QTYPES;
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$out = '';
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$catcontext = get_context_instance_by_id($category->contextid);
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if (has_capability('moodle/question:useall', $catcontext)){
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$randomusablequestions = $QTYPES['random']->get_usable_questions_from_category(
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$category->id, $recurse, '0');
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$maxrand = count($randomusablequestions);
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if ($maxrand > 0) {
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for ($i = 1;$i <= min(10, $maxrand); $i++) {
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$randomcount[$i] = $i;
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}
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for ($i = 20;$i <= min(100, $maxrand); $i += 10) {
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$randomcount[$i] = $i;
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}
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$out .= '<br />';
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$out .= get_string('addrandom', 'quiz', choose_from_menu($randomcount, 'randomcount', '1', '', '', '', true));
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$out .= '<input type="hidden" name="recurse" value="'.$recurse.'" />';
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$out .= '<input type="hidden" name="categoryid" value="'.$category->id.'" />';
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$out .= ' <input type="submit" name="addrandom" value="'. get_string('add') .'" />';
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$out .= helpbutton('random', get_string('random', 'quiz'), 'quiz', true, false, '', true);
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}
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}
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return $out;
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}
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list($thispageurl, $contexts, $cmid, $cm, $quiz, $pagevars) = question_edit_setup('editq', true);
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//these params are only passed from page request to request while we stay on this page
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//otherwise they would go in question_edit_setup
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$quiz_showbreaks = optional_param('showbreaks', -1, PARAM_BOOL);
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$quiz_reordertool = optional_param('reordertool', 0, PARAM_BOOL);
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if ($quiz_showbreaks > -1) {
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$thispageurl->param('showbreaks', $quiz_showbreaks);
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} else {
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$quiz_showbreaks = get_config('quiz', 'questionsperpage') > 1;
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}
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if ($quiz_reordertool != 0) {
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$thispageurl->param('reordertool', $quiz_reordertool);
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}
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$strquizzes = get_string('modulenameplural', 'quiz');
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$strquiz = get_string('modulename', 'quiz');
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$streditingquestions = get_string('editquestions', "quiz");
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$streditingquiz = get_string('editinga', 'moodle', $strquiz);
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// Get the course object and related bits.
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if (! $course = $DB->get_record('course', array('id' => $quiz->course))) {
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print_error('invalidcourseid', 'error');
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}
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// Log this visit.
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add_to_log($cm->course, 'quiz', 'editquestions',
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"view.php?id=$cm->id", "$quiz->id", $cm->id);
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//you need mod/quiz:manage in addition to question capabilities to access this page.
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require_capability('mod/quiz:manage', $contexts->lowest());
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if (isset($quiz->instance)
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&& empty($quiz->grades)){ // Construct an array to hold all the grades.
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$quiz->grades = quiz_get_all_question_grades($quiz);
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}
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/// Now, check for commands on this page and modify variables as necessary
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// If any edit action makes a sifnificant change to the structure of the quiz, then we
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// will need to delete all preview attempts.
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$significantchangemade = false;
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if (($up = optional_param('up', false, PARAM_INT)) !== false and confirm_sesskey()) { /// Move the given question up a slot
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$questions = explode(",", $quiz->questions);
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if ($up > 0 and isset($questions[$up])) {
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$prevkey = ($questions[$up-1] == 0) ? $up-2 : $up-1;
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$swap = $questions[$prevkey];
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$questions[$prevkey] = $questions[$up];
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$questions[$up] = $swap;
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$quiz->questions = implode(",", $questions);
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// Always have a page break at the end
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$quiz->questions = $quiz->questions . ',0';
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// Avoid duplicate page breaks
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$quiz->questions = str_replace(',0,0', ',0', $quiz->questions);
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if (!$DB->set_field('quiz', 'questions', $quiz->questions, array('id' => $quiz->instance))) {
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print_error('cannotsavequestion', 'quiz');
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}
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$significantchangemade = true;
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}
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}
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if (($down = optional_param('down', false, PARAM_INT)) !== false and confirm_sesskey()) { /// Move the given question down a slot
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$questions = explode(",", $quiz->questions);
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if ($down < count($questions)) {
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$nextkey = ($questions[$down+1] == 0) ? $down+2 : $down+1;
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$swap = $questions[$nextkey];
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$questions[$nextkey] = $questions[$down];
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$questions[$down] = $swap;
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$quiz->questions = implode(",", $questions);
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// Avoid duplicate page breaks
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$quiz->questions = str_replace(',0,0', ',0', $quiz->questions);
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if (!$DB->set_field('quiz', 'questions', $quiz->questions, array('id' => $quiz->instance))) {
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print_error('cannotsavequestion', 'quiz');
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}
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$significantchangemade = true;
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}
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}
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if (($addquestion = optional_param('addquestion', 0, PARAM_INT)) and confirm_sesskey()) { /// Add a single question to the current quiz
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quiz_add_quiz_question($addquestion, $quiz);
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$significantchangemade = true;
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}
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if (optional_param('add', false, PARAM_BOOL) and confirm_sesskey()) { /// Add selected questions to the current quiz
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$rawdata = (array) data_submitted();
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foreach ($rawdata as $key => $value) { // Parse input for question ids
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if (preg_match('!^q([0-9]+)$!', $key, $matches)) {
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$key = $matches[1];
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quiz_add_quiz_question($key, $quiz);
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}
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}
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$significantchangemade = true;
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}
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if (optional_param('addrandom', false, PARAM_BOOL) and confirm_sesskey()) { /// Add random questions to the quiz
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$recurse = optional_param('recurse', 0, PARAM_BOOL);
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$categoryid = required_param('categoryid', PARAM_INT);
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$randomcount = required_param('randomcount', PARAM_INT);
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// load category
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if (! $category = $DB->get_record('question_categories', array('id' => $categoryid))) {
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print_error('invalidcategoryid', 'error');
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}
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$catcontext = get_context_instance_by_id($category->contextid);
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require_capability('moodle/question:useall', $catcontext);
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$category->name = $category->name;
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// Find existing random questions in this category that are not used by any quiz.
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if ($existingquestions = $DB->get_records_sql(
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"SELECT * FROM {question} q
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WHERE qtype = '" . RANDOM . "'
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AND category = ?
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AND " . $DB->sql_compare_text('questiontext') . " = ?
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AND NOT EXISTS (SELECT * FROM {quiz_question_instances} WHERE question = q.id)
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ORDER BY id", array($category->id, $recurse))) {
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// Take as many of these as needed.
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while (($existingquestion = array_shift($existingquestions)) and $randomcount > 0) {
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quiz_add_quiz_question($existingquestion->id, $quiz);
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$randomcount--;
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}
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}
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// If more are needed, create them.
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if ($randomcount > 0) {
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$form->questiontext = $recurse; // we use the questiontext field to store the info
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// on whether to include questions in subcategories
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$form->questiontextformat = 0;
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$form->image = '';
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$form->defaultgrade = 1;
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$form->hidden = 1;
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for ($i = 0; $i < $randomcount; $i++) {
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$form->category = "$category->id,$category->contextid";
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$form->stamp = make_unique_id_code(); // Set the unique code (not to be changed)
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$question = new stdClass;
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$question->qtype = RANDOM;
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$question = $QTYPES[RANDOM]->save_question($question, $form, $course);
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if(!isset($question->id)) {
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print_error('cannotinsertrandomquestion', 'quiz');
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}
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quiz_add_quiz_question($question->id, $quiz);
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}
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}
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$significantchangemade = true;
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}
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if (optional_param('repaginate', false, PARAM_BOOL) and confirm_sesskey()) { /// Re-paginate the quiz
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$questionsperpage = optional_param('questionsperpage', $quiz->questionsperpage, PARAM_INT);
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if ($questionsperpage != $quiz->questionsperpage) {
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$quiz->questionsperpage = $questionsperpage;
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if (!$DB->set_field('quiz', 'questionsperpage', $quiz->questionsperpage, array('id' => $quiz->id))) {
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print_error('cannotsavenumberofquestion', 'quiz');
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}
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}
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$quiz->questions = quiz_repaginate($quiz->questions, $quiz->questionsperpage);
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if (!$DB->set_field('quiz', 'questions', $quiz->questions, array('id' => $quiz->id))) {
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print_error('cannotsavelayout', 'quiz');
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}
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$significantchangemade = true;
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}
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if (($delete = optional_param('delete', false, PARAM_INT)) !== false and confirm_sesskey()) { /// Remove a question from the quiz
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quiz_delete_quiz_question($delete, $quiz);
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$significantchangemade = true;
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}
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if (optional_param('savechanges', false, PARAM_BOOL) and confirm_sesskey()) {
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/// We need to save the new ordering (if given) and the new grades
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$oldquestions = explode(",", $quiz->questions); // the questions in the old order
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$questions = array(); // for questions in the new order
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$rawgrades = (array) data_submitted();
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unset($quiz->grades);
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foreach ($rawgrades as $key => $value) {
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/// Parse input for question -> grades
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if (preg_match('!^q([0-9]+)$!', $key, $matches)) {
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$key = $matches[1];
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$quiz->grades[$key] = $value;
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quiz_update_question_instance($quiz->grades[$key], $key, $quiz->instance);
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/// Parse input for ordering info
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} elseif (preg_match('!^o([0-9]+)$!', $key, $matches)) {
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$key = $matches[1];
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// Make sure two questions don't overwrite each other. If we get a second
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// question with the same position, shift the second one along to the next gap.
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while (array_key_exists($value, $questions)) {
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$value++;
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}
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$questions[$value] = $oldquestions[$key];
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}
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}
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// If ordering info was given, reorder the questions
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if ($questions) {
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ksort($questions);
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// Make sure that the quiz does not start with a page break.
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while (reset($questions) == '0') {
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array_shift($questions);
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}
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$quiz->questions = implode(",", $questions);
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// Always have a page break at the end
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$quiz->questions = $quiz->questions . ',0';
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// Avoid duplicate page breaks
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while (strpos($quiz->questions, ',0,0')) {
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$quiz->questions = str_replace(',0,0', ',0', $quiz->questions);
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}
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if (!$DB->set_field('quiz', 'questions', $quiz->questions, array('id' => $quiz->instance))) {
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print_error('cannotsavequestion', 'quiz');
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}
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}
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// If rescaling is required save the new maximum
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$maxgrade = optional_param('maxgrade', -1, PARAM_NUMBER);
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if ($maxgrade >= 0) {
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if (!quiz_set_grade($maxgrade, $quiz)) {
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print_error('cannotsetgrade', 'quiz');
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}
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}
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$significantchangemade = true;
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}
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/// Delete any teacher preview attempts if the quiz has been modified
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if ($significantchangemade) {
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$previewattempts = $DB->get_records_select('quiz_attempts',
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'quiz = ? AND preview = 1', array($quiz->id));
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if ($previewattempts) {
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foreach ($previewattempts as $attempt) {
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quiz_delete_attempt($attempt, $quiz);
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}
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}
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}
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question_showbank_actions($thispageurl, $cm);
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/// all commands have been dealt with, now print the page
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// Print basic page layout.
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if (isset($quiz->instance) and $DB->record_exists_select('quiz_attempts', "quiz = ? AND preview = '0'", array($quiz->instance))){
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// one column layout with table of questions used in this quiz
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$strupdatemodule = has_capability('moodle/course:manageactivities', $contexts->lowest())
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? update_module_button($cm->id, $course->id, get_string('modulename', 'quiz'))
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: "";
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$navigation = build_navigation($streditingquiz, $cm);
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print_header_simple($streditingquiz, '', $navigation, "", "",
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true, $strupdatemodule);
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$currenttab = 'edit';
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$mode = 'editq';
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include('tabs.php');
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print_box_start();
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echo "<div class=\"quizattemptcounts\">\n";
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echo '<a href="report.php?mode=overview&id=' . $cm->id . '">' .
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quiz_num_attempt_summary($quiz, $cm) . '</a><br />' .
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get_string('cannoteditafterattempts', 'quiz');
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echo "</div>\n";
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$sumgrades = quiz_print_question_list($quiz, $thispageurl, false, $quiz_showbreaks, $quiz_reordertool);
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if (!$DB->set_field('quiz', 'sumgrades', $sumgrades, array('id' => $quiz->instance))) {
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print_error('cannotsetsumgrades', 'quiz');
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}
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print_box_end();
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print_footer($course);
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exit;
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}
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// two column layout with quiz info in left column
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$strupdatemodule = has_capability('moodle/course:manageactivities', $contexts->lowest())
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? update_module_button($cm->id, $course->id, get_string('modulename', 'quiz'))
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: "";
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$navigation = build_navigation($streditingquiz, $cm);
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print_header_simple($streditingquiz, '', $navigation, "", "", true, $strupdatemodule);
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$currenttab = 'edit';
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$mode = 'editq';
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include('tabs.php');
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echo '<table border="0" style="width:100%" cellpadding="2" cellspacing="0">';
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echo '<tr><td style="width:50%" valign="top">';
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print_box_start('generalbox quizquestions');
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print_heading(get_string('questionsinthisquiz', 'quiz'), '', 2);
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$sumgrades = quiz_print_question_list($quiz, $thispageurl, true, $quiz_showbreaks, $quiz_reordertool);
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if (!$DB->set_field('quiz', 'sumgrades', $sumgrades, array('id' => $quiz->instance))) {
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print_error('cannotsetsumgrades', 'quiz');
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}
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print_box_end();
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echo '</td><td style="width:50%" valign="top">';
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question_showbank('editq', $contexts, $thispageurl, $cm, $pagevars['qpage'], $pagevars['qperpage'], $pagevars['qsortorder'], $pagevars['qsortorderdecoded'],
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$pagevars['cat'], $pagevars['recurse'], $pagevars['showhidden'], $pagevars['showquestiontext']);
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echo '</td></tr>';
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echo '</table>';
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print_footer($course);
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?>
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