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3192d014f3
Also, when you edit the quiz, and therefore any preview attempts are deleted automatically, make sure the attempts are deleted properly by calling quiz_delete_attempt on each one, rathern than leaving orphaned junk in the database.
387 lines
17 KiB
PHP
387 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, $cmid){
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$catcontext = get_context_instance_by_id($category->contextid);
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if (has_capability('moodle/question:useall', $catcontext)){
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for ($i = 1;$i <= min(10, $totalnumber); $i++) {
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$randomcount[$i] = $i;
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}
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for ($i = 20;$i <= min(100, $totalnumber); $i += 10) {
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$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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} else {
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$out = '';
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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 = ($CFG->quiz_questionsperpage < 2) ? 0 : 1;
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}
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if ($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 = get_record("course", "id", $quiz->course)) {
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error("This course doesn't exist");
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}
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// Log this visit.
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add_to_log($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 (!set_field('quiz', 'questions', $quiz->questions, 'id', $quiz->instance)) {
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error('Could not save question list');
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}
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$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 (!set_field('quiz', 'questions', $quiz->questions, 'id', $quiz->instance)) {
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error('Could not save question list');
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}
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$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 = get_record('question_categories', 'id', $categoryid)) {
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error('Category ID is incorrect');
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}
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$catcontext = get_context_instance_by_id($category->contextid);
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require_capability('moodle/question:useall', $catcontext);
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$category->name = addslashes($category->name);
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// Find existing random questions in this category that are not used by any quiz.
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if ($existingquestions = get_records_sql(
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"SELECT * FROM " . $CFG->prefix . "question q
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WHERE qtype = '" . RANDOM . "'
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AND category = $category->id
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AND " . sql_compare_text('questiontext') . " = '$recurse'
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AND NOT EXISTS (SELECT * FROM " . $CFG->prefix . "quiz_question_instances WHERE question = q.id)
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ORDER BY id")) {
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// Take as many of these as needed.
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while (($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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error('Could not insert new random question!');
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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 (!set_field('quiz', 'questionsperpage', $quiz->questionsperpage, 'id', $quiz->id)) {
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error('Could not save number of questions per page');
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}
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}
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$quiz->questions = quiz_repaginate($quiz->questions, $quiz->questionsperpage);
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if (!set_field('quiz', 'questions', $quiz->questions, 'id', $quiz->id)) {
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error('Could not save layout');
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}
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$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 (!set_field('quiz', 'questions', $quiz->questions, 'id', $quiz->instance)) {
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error('Could not save question list');
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}
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}
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// If rescaling is required save the new maximum
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$maxgrade = optional_param('maxgrade', -1, PARAM_NUMBER);
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if ($maxgrade >= 0) {
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if (!quiz_set_grade($maxgrade, $quiz)) {
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error('Could not set a new maximum grade for the quiz');
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}
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}
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$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 = get_records_select('quiz_attempts',
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'quiz = ' . $quiz->id . ' AND preview = 1');
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if ($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 record_exists_select('quiz_attempts', "quiz = '$quiz->instance' AND preview = '0'")){
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// one column layout with table of questions used in this quiz
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$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 (!set_field('quiz', 'sumgrades', $sumgrades, 'id', $quiz->instance)) {
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error('Failed to set sumgrades');
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}
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print_box_end();
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print_footer($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 (!set_field('quiz', 'sumgrades', $sumgrades, 'id', $quiz->instance)) {
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error('Failed to set sumgrades');
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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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