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moodle/mod/quiz/edit.php
gustav_delius 39e3c1f1c3 Merged from STABLE
2005-07-06 07:53:17 +00:00

487 lines
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<?php // $Id$
/**
* Page to edit quizzes
*
* This page generally has two columns:
* The right column lists all available questions in a chosen category and
* allows them to be edited or more to be added. This column is only there if
* the quiz does not already have student attempts
* The left column lists all questions that have been added to the current quiz.
* This column is only there if this page has been called in the context of a quiz.
* The lecturer can add questions from the right hand list to the quiz or remove them
*
* The script also processes a number of actions:
* Actions affecting a quiz:
* up and down Changes the order of questions and page breaks
* addquestion Adds a single question to the quiz
* add Adds several selected questions to the quiz
* addrandom Adds a certain number of random questions to the quiz
* delete Removes a question from the quiz
* setgrades Changes the maximum grades for questions in the quiz
* repaginate Re-paginates the quiz
* Actions affecting the question pool:
* move Moves a question to a different category
* deleteselected Deletes the selected questions from the category
* Other actions:
* cat Chooses the category
* displayoptions Sets display options
*
* @version $Id$
* @author Martin Dougiamas and many others. This has recently been extensively
* rewritten by Gustav Delius and other members of the Serving Mathematics project
* {@link http://maths.york.ac.uk/serving_maths}
* @license http://www.gnu.org/copyleft/gpl.html GNU Public License
* @package quiz
*/
require_once("../../config.php");
require_once("editlib.php");
require_login();
$courseid = optional_param('courseid');
$quizid = optional_param('quizid');
$page = optional_param('page', -1);
$perpage = optional_param('perpage', 20);
$strquizzes = get_string('modulenameplural', 'quiz');
$strquiz = get_string('modulename', 'quiz');
$streditingquestions = get_string('editquestions', "quiz");
$streditingquiz = get_string("editinga", "moodle", $strquiz);
if ($modform = data_submitted() and !empty($modform->course)) { // data submitted
$SESSION->modform = $modform; // Save the form in the current session
} else if ($quizid) {
if (isset($SESSION->modform->id) and $SESSION->modform->id == $quizid) {
// modform for this quiz already exists, use it
$modform = $SESSION->modform;
} else {
// create new modform from database
if (! $modform = get_record('quiz', 'id', $quizid)) {
error("The required quiz doesn't exist");
}
$modform->instance = $modform->id;
$SESSION->modform = $modform; // Save the form in the current session
$cm = get_coursemodule_from_instance('quiz', $modform->instance);
$modform->cmid = $cm->id;
// We don't log all visits to this page but only those that recreate modform
add_to_log($cm->course, 'quiz', 'editquestions',
"view.php?id=$cm->id",
"$quizid", $cm->id);
}
} else if ($courseid) { // Page retrieve through "Edit Questions" link - no quiz selected
$modform->course = $courseid;
unset($modform->instance);
$SESSION->modform = $modform; // Save the form in the current session
add_to_log($courseid, 'quiz', 'editquestions', "index.php?id=$courseid");
} else {
// we might get here after editing a question in
// a popup window. So close window automatically.
?>
<script type="text/javascript">
<!--
if (self.name == 'editquestion') {
self.close();
}
-->
</script>
<noscript>
<?php notify(get_string('pleaseclose', 'quiz')); ?>
</noscript>
<?php
// no quiz or course was specified so we need to use the stored modform
if (isset($SESSION->modform)) {
$modform = $SESSION->modform;
} else {
exit;
}
}
if (! $course = get_record("course", "id", $modform->course)) {
error("This course doesn't exist");
}
require_login($course->id, false);
if (!isteacheredit($course->id)) {
error("You can't modify this course!");
}
if (isset($modform->instance)
&& empty($modform->grades)) // Construct an array to hold all the grades.
{
$modform->grades = quiz_get_all_question_grades($modform);
}
if ($page > -1) {
$modform->page = $page;
} else {
$page = isset($modform->page) ? $modform->page : 0;
}
/// Now, check for commands on this page and modify variables as necessary
if (isset($_REQUEST['up']) and confirm_sesskey()) { /// Move the given question up a slot
$questions = explode(",", $modform->questions);
if ($up > 0 and isset($questions[$up])) {
$prevkey = ($questions[$up-1] == 0) ? $up-2 : $up-1;
$swap = $questions[$prevkey];
$questions[$prevkey] = $questions[$up];
$questions[$up] = $swap;
$modform->questions = implode(",", $questions);
// Always have a page break at the end
$modform->questions = $modform->questions . ',0';
// Avoid duplicate page breaks
$modform->questions = str_replace(',0,0', ',0', $modform->questions);
if (!set_field('quiz', 'questions', $modform->questions, 'id', $modform->instance)) {
error('Could not save question list');
}
}
}
if (isset($_REQUEST['down']) and confirm_sesskey()) { /// Move the given question down a slot
$questions = explode(",", $modform->questions);
if ($down < count($questions)) {
$nextkey = ($questions[$down+1] == 0) ? $down+2 : $down+1;
$swap = $questions[$nextkey];
$questions[$nextkey] = $questions[$down];
$questions[$down] = $swap;
$modform->questions = implode(",", $questions);
// Avoid duplicate page breaks
$modform->questions = str_replace(',0,0', ',0', $modform->questions);
if (!set_field('quiz', 'questions', $modform->questions, 'id', $modform->instance)) {
error('Could not save question list');
}
}
}
if (isset($_REQUEST['addquestion']) and confirm_sesskey()) { /// Add a single question to the current quiz
quiz_add_quiz_question($_REQUEST['addquestion'], $modform);
}
if (isset($_REQUEST['add']) and confirm_sesskey()) { /// Add selected questions to the current quiz
foreach ($_POST as $key => $value) { // Parse input for question ids
if (substr($key, 0, 1) == "q") {
quiz_add_quiz_question(substr($key,1), $modform);
}
}
}
if (isset($_REQUEST['addrandom']) and confirm_sesskey()) { /// Add random questions to the quiz
$recurse = optional_param('recurse', 0, PARAM_BOOL);
$categoryid = required_param('categoryid', PARAM_INT);
$randomcount = required_param('randomcount', PARAM_INT);
// load category
if (! $category = get_record('quiz_categories', 'id', $categoryid)) {
error('Category ID is incorrect');
}
// find existing random questions in this category
$random = RANDOM;
if ($existingquestions = get_records_select('quiz_questions', "qtype = '$random' AND category = '$category->id'")) {
// now remove the ones that are already used in this quiz
if ($questionids = explode(',', $modform->questions)) {
foreach ($questionids as $questionid) {
unset($existingquestions[$questionid]);
}
}
// now take as many of these as needed
$i = 0;
while (($existingquestion = array_pop($existingquestions)) and ($i < $randomcount)) {
if ($existingquestion->questiontext == $recurse) {
// this question has the right recurse property, so use it
quiz_add_quiz_question($existingquestion->id, $modform);
$i++;
}
}
$randomcreate = $randomcount - $i; // the number of additional random questions needed.
} else {
$randomcreate = $randomcount;
}
if ($randomcreate > 0) {
$form->name = get_string('random', 'quiz') .' ('. $category->name .')';
$form->questiontext = $recurse; // we use the questiontext field to store the info
// on whether to include questions in subcategories
$form->questiontextformat = 0;
$form->image = '';
$form->defaultgrade = 1;
$form->hidden = 1;
for ($i=0; $i<$randomcreate; $i++) {
$form->stamp = make_unique_id_code(); // Set the unique code (not to be changed)
$question = new stdClass;
$question->category = $category->id;
$question->qtype = RANDOM;
$question = $QUIZ_QTYPES[RANDOM]->save_question($question, $form, $course);
if(!isset($question->id)) {
error('Could not insert new random question!');
}
quiz_add_quiz_question($question->id, $modform);
}
}
}
if (isset($_REQUEST['repaginate']) and confirm_sesskey()) { /// Re-paginate the quiz
if (isset($_REQUEST['questionsperpage'])) {
$modform->questionsperpage = required_param('questionsperpage', 1, PARAM_INT);
if (!set_field('quiz', 'questionsperpage', $modform->questionsperpage, 'id', $modform->id)) {
error('Could not save number of questions per page');
}
}
$modform->questions = quiz_repaginate($modform->questions, $modform->questionsperpage);
if (!set_field('quiz', 'questions', $modform->questions, 'id', $modform->id)) {
error('Could not save layout');
}
}
if (isset($_REQUEST['move']) and confirm_sesskey()) { /// Move selected questions to new category
if (!$tocategory = get_record('quiz_categories', 'id', $_REQUEST['category'])) {
error('Invalid category');
}
if (!isteacheredit($tocategory->course)) {
error(get_string('categorynoedit', 'quiz', $tocategory->name), 'edit.php');
}
foreach ($_POST as $key => $value) { // Parse input for question ids
if (substr($key, 0, 1) == "q") {
$key = substr($key,1);
if (!set_field('quiz_questions', 'category', $tocategory->id, 'id', $key)) {
error('Could not update category field');
}
}
}
}
if (isset($_REQUEST['delete']) and confirm_sesskey()) { /// Remove a question from the quiz
quiz_delete_quiz_question($_REQUEST['delete'], $modform);
}
if (isset($_REQUEST['deleteselected'])) { // delete selected questions from the category
if (isset($confirm) and confirm_sesskey()) { // teacher has already confirmed the action
if ($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) {
if (record_exists('quiz_question_instances', 'question', $questionid) or
record_exists('quiz_states', 'originalquestion', $questionid)) {
if (!set_field('quiz_questions', 'hidden', 1, 'id', $questionid)) {
error('Was not able to hide question');
}
} else {
delete_records("quiz_questions", "id", $questionid);
}
}
}
redirect("edit.php");
} else {
error("Confirmation string was incorrect");
}
} else { // teacher still has to confirm
// make a list of all the questions that are selected
$rawquestions = $_POST;
$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 => $value) { // Parse input for question ids
if (substr($key, 0, 1) == "q") {
$key = substr($key,1);
$questionlist .= $key.',';
if (record_exists('quiz_question_instances', 'question', $key) or
record_exists('quiz_states', 'originalquestion', $key)) {
$questionnames .= '* ';
$inuse = true;
}
$questionnames .= get_field('quiz_questions', 'name', 'id', $key).'<br />';
}
}
if (!$questionlist) { // no questions were selected
redirect('edit.php');
}
$questionlist = rtrim($questionlist, ',');
// Add an explanation about questions in use
if ($inuse) {
$questionnames .= get_string('questionsinuse', 'quiz');
}
print_header_simple($streditingquestions, '',
"<a href=\"index.php?id=$course->id\">$strquizzes</a>".
" -> $streditingquestions");
notice_yesno(get_string("deletequestionscheck", "quiz", $questionnames),
"edit.php?sesskey=$USER->sesskey&amp;deleteselected=$questionlist&amp;confirm=".md5($questionlist), "edit.php");
print_footer($course);
exit;
}
}
if (isset($_REQUEST['setgrades']) and confirm_sesskey()) {
/// The grades have been updated, so update our internal list
$rawgrades = $_POST;
unset($modform->grades);
foreach ($rawgrades as $key => $value) { // Parse input for question -> grades
if (substr($key, 0, 1) == "q") {
$key = substr($key,1);
$modform->grades[$key] = $value;
quiz_update_question_instance($modform->grades[$key], $key, $modform->instance);
}
}
// If rescaling is required save the new maximum
if (isset($_REQUEST['maxgrade'])) {
$modform->grade = optional_param('maxgrade', 0);
if (!set_field('quiz', 'grade', $modform->grade, 'id', $modform->instance)) {
error('Could not set new maximal grade for quiz');
}
}
}
if (isset($_REQUEST['cat'])) { /// coming from category selection drop-down menu
$modform->category = $cat;
$page = 0;
$modform->page = 0;
}
if(isset($_REQUEST['recurse'])) {
$SESSION->quiz_recurse = optional_param('recurse', 0, PARAM_BOOL);
}
if(isset($_REQUEST['showbreaks'])) {
$SESSION->quiz_showbreaks = optional_param('showbreaks', 0, PARAM_BOOL);
}
if(isset($_REQUEST['showhidden'])) {
$SESSION->quiz_showhidden = optional_param('showhidden', 0, PARAM_BOOL);
}
/// Delete any teacher preview attempts if the quiz has been modified
if (isset($_REQUEST['setgrades']) or isset($_REQUEST['delete']) or isset($_REQUEST['repaginate']) or isset($_REQUEST['addrandom']) or isset($_REQUEST['addquestion']) or isset($_REQUEST['up']) or isset($_REQUEST['down']) or isset($_REQUEST['add'])) {
delete_records('quiz_attempts', 'preview', '1', 'quiz', $modform->id);
}
/// all commands have been dealt with, now print the page
if (empty($modform->category) or !record_exists('quiz_categories', 'id', $modform->category)) {
$category = quiz_get_default_category($course->id);
$modform->category = $category->id;
}
if (!isset($SESSION->quiz_recurse)) {
$SESSION->quiz_recurse = 1;
}
if (!isset($SESSION->quiz_showhidden)) {
$SESSION->quiz_showhidden = false;
}
if (!isset($SESSION->quiz_showbreaks)) {
$SESSION->quiz_showbreaks = ($CFG->quiz_questionsperpage < 2) ? 0 : 1;
}
$SESSION->modform = $modform;
// Print basic page layout.
if (isset($modform->instance) and record_exists_sql("SELECT * FROM {$CFG->prefix}quiz_attempts WHERE quiz = '$modform->instance' AND preview = '0' LIMIT 1")){
// one column layout with table of questions used in this quiz
$strupdatemodule = isteacheredit($course->id)
? update_module_button($modform->cmid, $course->id, get_string('modulename', 'quiz'))
: "";
print_header_simple($streditingquiz, '',
"<a href=\"index.php?id=$course->id\">$strquizzes</a>".
" -> <a href=\"view.php?q=$modform->instance\">".format_string($modform->name).'</a>'.
" -> $streditingquiz", "", "",
true, $strupdatemodule);
$currenttab = 'edit';
$quiz = &$modform;
include('tabs.php');
print_simple_box_start("center");
$attemptcount = count_records('quiz_attempts', 'quiz', $modform->instance, 'preview', 0);
$strviewallanswers = get_string("viewallanswers","quiz",$attemptcount);
$strattemptsexist = get_string("attemptsexist","quiz");
$usercount = count_records_select('quiz_attempts', "quiz = '$modform->id' AND preview = '0'", 'COUNT(DISTINCT userid)');
$strusers = $course->students;
if (! $cm = get_coursemodule_from_instance("quiz", $modform->instance, $course->id)) {
error("Course Module ID was incorrect");
}
echo "<center>\n";
echo "$strattemptsexist<br /><a href=\"report.php?mode=overview&amp;id=$cm->id\">$strviewallanswers ($usercount $strusers)</a>";
echo "<form target=\"_parent\" method=\"get\" action=\"$CFG->wwwroot/mod/quiz/edit.php\">\n";
echo " <input type=\"hidden\" name=\"courseid\" value=\"$course->id\" />\n";
echo " <input type=\"submit\" value=\"".get_string("editcatquestions", "quiz")."\" />\n";
echo "</form>";
echo "</center><br/ >\n";
$sumgrades = quiz_print_question_list($modform, false, $SESSION->quiz_showbreaks);
if (!set_field('quiz', 'sumgrades', $sumgrades, 'id', $modform->instance)) {
error('Failed to set sumgrades');
}
print_simple_box_end();
print_footer($course);
exit;
}
if (!isset($modform->instance)) {
// one column layout for non-quiz-specific editing page
print_header_simple($streditingquestions, '',
"<a href=\"index.php?id=$course->id\">$strquizzes</a>".
" -> $streditingquestions");
echo '<table align="center" border="0" cellpadding="2" cellspacing="0">';
echo '<tr><td valign="top">';
} else {
// two column layout with quiz info in left column
$strupdatemodule = isteacheredit($course->id)
? update_module_button($modform->cmid, $course->id, get_string('modulename', 'quiz'))
: "";
print_header_simple($streditingquiz, '',
"<a href=\"index.php?id=$course->id\">$strquizzes</a>".
" -> <a href=\"view.php?q=$modform->instance\">".format_string($modform->name).'</a>'.
" -> $streditingquiz",
"", "", true, $strupdatemodule);
$currenttab = 'edit';
$quiz = &$modform;
include('tabs.php');
echo '<table border="0" width="100%" cellpadding="2" cellspacing="0">';
echo '<tr><td width="50%" valign="top">';
print_simple_box_start("center", "100%");
$sumgrades = quiz_print_question_list($modform, true, $SESSION->quiz_showbreaks);
if (!set_field('quiz', 'sumgrades', $sumgrades, 'id', $modform->instance)) {
error('Failed to set sumgrades');
}
print_simple_box_end();
echo '</td><td valign="top" width="50%">';
}
// non-quiz-specific column
print_simple_box_start("center", "100%");
// starts with category selection form
quiz_print_category_form($course, $modform->category, $SESSION->quiz_recurse, $SESSION->quiz_showhidden);
print_simple_box_end();
print_spacer(5,1);
// continues with list of questions
print_simple_box_start("center", "100%");
quiz_print_cat_question_list($course, $modform->category,
isset($modform->instance) ? $modform->instance : 0, $SESSION->quiz_recurse, $page, $perpage, $SESSION->quiz_showhidden);
print_simple_box_end();
if (!isset($modform->instance)) {
print_continue("index.php?id=$modform->course");
}
echo '</td></tr>';
echo '</table>';
print_footer($course);
?>
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