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<?PHP // $Id$
/// For creating and editing quiz questions.
require("../../config.php");
require("lib.php");
require("../../files/mimetypes.php");
optional_variable($id);
optional_variable($type);
optional_variable($category);
if ($id) {
if (! $question = get_record("quiz_questions", "id", $id)) {
error("This question doesn't exist");
}
if (! $category = get_record("quiz_categories", "id", $question->category)) {
error("This question doesn't belong to a valid category!");
}
if (! $course = get_record("course", "id", $category->course)) {
error("This question category doesn't belong to a valid course!");
}
$type = $question->type;
} else if ($category) {
if (! $category = get_record("quiz_categories", "id", $category)) {
error("This wasn't a valid category!");
}
if (! $course = get_record("course", "id", $category->course)) {
error("This category doesn't belong to a valid course!");
}
$question->category = $category->id;
$question->type = $type;
} else {
error("Must specify question id or category");
}
require_login($course->id);
if (!isteacher($course->id)) {
error("You can't modify these questions!");
}
$streditingquiz = get_string("editingquiz", "quiz");
$streditingquestion = get_string("editingquestion", "quiz");
print_header("$course->shortname: $streditingquestion", "$course->shortname: $streditingquestion",
"<A HREF=\"$CFG->wwwroot/course/view.php?id=$course->id\">$course->shortname</A>
-> <A HREF=\"$HTTP_REFERER\">$streditingquiz</A> -> $streditingquestion");
if (isset($delete)) {
if (isset($confirm)) {
if ($confirm == md5($delete)) {
if (!delete_records("quiz_questions", "id", $question->id)) {
error("An error occurred trying to delete question (id $question->id)");
}
redirect("edit.php");
} else {
error("Confirmation string was incorrect");
}
} else {
if ($category->publish) {
$quizzes = get_records("quiz");
} else {
$quizzes = get_records("quiz", "course", $course->id);
}
$beingused = array();
if ($quizzes) {
foreach ($quizzes as $quiz) {
$qqq = explode(",", $quiz->questions);
foreach ($qqq as $key => $value) {
if ($value == $delete) {
$beingused[] = $quiz->name;
}
}
}
}
if ($beingused) {
$beingused = implode(", ", $beingused);
$beingused = get_string("questioninuse", "quiz", "<I>$question->name</I>")."<P>".$beingused;
notice($beingused, "edit.php");
} else {
notice_yesno(get_string("deletequestioncheck", "quiz", $question->name),
"question.php?id=$question->id&delete=$delete&confirm=".md5($delete), "edit.php");
}
print_footer($course);
exit;
}
}
if (match_referer() and isset($HTTP_POST_VARS)) { // question submitted
$form = (object)$HTTP_POST_VARS;
// First, save the basic question itself
$question->name = $form->name;
$question->questiontext = $form->questiontext;
$question->image = $form->image;
$question->category = $form->category;
if ($question->id) { // Question already exists
if (!update_record("quiz_questions", $question)) {
error("Could not update question!");
}
} else { // Question is a new one
if (!$question->id = insert_record("quiz_questions", $question)) {
error("Could not insert new question!");
}
}
// Now to save all the answers and type-specific options
switch ($question->type) {
case SHORTANSWER:
// Delete all the old answers
delete_records("quiz_answers", "question", $question->id);
delete_records("quiz_shortanswer", "question", $question->id);
$answers = array();
$maxfraction = -1;
// Insert all the new answers
foreach ($form->answer as $key => $formanswer) {
if ($formanswer) {
unset($answer);
$answer->answer = $formanswer;
$answer->question = $question->id;
$answer->fraction = $fraction[$key];
$answer->feedback = $feedback[$key];
if (!$answer->id = insert_record("quiz_answers", $answer)) {
error("Could not insert quiz answer!");
}
$answers[] = $answer->id;
if ($fraction[$key] > $maxfraction) {
$maxfraction = $fraction[$key];
}
}
}
unset($options);
$options->question = $question->id;
$options->answers = implode(",",$answers);
$options->usecase = $form->usecase;
if (!insert_record("quiz_shortanswer", $options)) {
error("Could not insert quiz shortanswer options!");
}
/// Perform sanity checks on fractional grades
if ($maxfraction != 1) {
$maxfraction = $maxfraction * 100;
notice_yesno(get_string("fractionsnomax", "quiz", $maxfraction), "question.php?id=$question->id", "edit.php");
print_footer($course);
exit;
}
break;
case TRUEFALSE:
delete_records("quiz_answers", "question", $question->id);
delete_records("quiz_truefalse", "question", $question->id);
$true->answer = get_string("true", "quiz");
$true->question = $question->id;
$true->fraction = $form->answer;
$true->feedback = $form->feedbacktrue;
if (!$true->id = insert_record("quiz_answers", $true)) {
error("Could not insert quiz answer \"true\")!");
}
$false->answer = get_string("false", "quiz");
$false->question = $question->id;
$false->fraction = 1 - (int)$form->answer;
$false->feedback = $form->feedbackfalse;
if (!$false->id = insert_record("quiz_answers", $false)) {
error("Could not insert quiz answer \"false\")!");
}
unset($options);
$options->question = $question->id;
$options->true = $true->id;
$options->false = $false->id;
if (!insert_record("quiz_truefalse", $options)) {
error("Could not insert quiz truefalse options!");
}
break;
case MULTICHOICE:
delete_records("quiz_answers", "question", $question->id);
delete_records("quiz_multichoice", "question", $question->id);
$totalfraction = 0;
$maxfraction = -1;
$answers = array();
// Insert all the new answers
foreach ($form->answer as $key => $formanswer) {
if ($formanswer) {
unset($answer);
$answer->answer = $formanswer;
$answer->question = $question->id;
$answer->fraction = $fraction[$key];
$answer->feedback = $feedback[$key];
if (!$answer->id = insert_record("quiz_answers", $answer)) {
error("Could not insert quiz answer!");
}
$answers[] = $answer->id;
if ($fraction[$key] > 0) { // Sanity checks
$totalfraction += $fraction[$key];
}
if ($fraction[$key] > $maxfraction) {
$maxfraction = $fraction[$key];
}
}
}
unset($options);
$options->question = $question->id;
$options->answers = implode(",",$answers);
$options->single = $form->single;
if (!insert_record("quiz_multichoice", $options)) {
error("Could not insert quiz multichoice options!");
}
/// Perform sanity checks on fractional grades
if ($options->single) {
if ($maxfraction != 1) {
$maxfraction = $maxfraction * 100;
notice_yesno(get_string("fractionsnomax", "quiz", $maxfraction), "question.php?id=$question->id", "edit.php");
print_footer($course);
exit;
}
} else {
$totalfraction = round($totalfraction,2);
if ($totalfraction != 1) {
$totalfraction = $totalfraction * 100;
notice_yesno(get_string("fractionsaddwrong", "quiz", $totalfraction), "question.php?id=$question->id", "edit.php");
print_footer($course);
exit;
}
}
break;
case RANDOM:
echo "<P>Not supported yet</P>";
break;
default:
error("Non-existent question type!");
break;
}
redirect("edit.php");
}
$grades = array(1,0.9,0.8,0.75,0.70,0.66666,0.60,0.50,0.40,0.33333,0.30,0.25,0.20,0.10,0.05,0);
foreach ($grades as $grade) {
$percentage = 100 * $grade;
$neggrade = -$grade;
$gradeoptions["$grade"] = "$percentage %";
$gradeoptionsfull["$grade"] = "$percentage %";
$gradeoptionsfull["$neggrade"] = -$percentage." %";
}
$gradeoptionsfull["0"] = $gradeoptions["0"] = get_string("none");
arsort($gradeoptions, SORT_NUMERIC);
arsort($gradeoptionsfull, SORT_NUMERIC);
if (!$categories = quiz_get_category_menu($course->id, true)) {
error("No categories!");
}
make_upload_directory("$course->id"); // Just in case
$coursefiles = get_directory_list("$CFG->dataroot/$course->id", $CFG->moddata);
foreach ($coursefiles as $filename) {
if (mimeinfo("icon", $filename) == "image.gif") {
$images["$filename"] = $filename;
}
}
// Print the question editing form
switch ($type) {
case SHORTANSWER:
$options = get_record("quiz_shortanswer", "question", "$question->id");// OK to fail
$answersraw = get_records_list("quiz_answers", "id", "$options->answers");// OK to fail
print_heading_with_help(get_string("editingshortanswer", "quiz"), "shortanswer", "quiz");
if ($answersraw) {
foreach ($answersraw as $answer) {
$answers[] = $answer; // to renumber index 0,1,2...
}
}
require("shortanswer.html");
break;
case TRUEFALSE:
$options = get_record("quiz_truefalse", "question", "$question->id"); // OK to fail
$true = get_record("quiz_answers", "id", "$options->true"); // OK to fail
$false = get_record("quiz_answers", "id", "$options->false"); // OK to fail
if ($true->fraction > $false->fraction) {
$question->answer = 1;
} else {
$question->answer = 0;
}
print_heading_with_help(get_string("editingtruefalse", "quiz"), "truefalse", "quiz");
require("truefalse.html");
break;
case MULTICHOICE:
$options = get_record("quiz_multichoice", "question", "$question->id");// OK to fail
$answersraw = get_records_list("quiz_answers", "id", "$options->answers");// OK to fail
if ($answersraw) {
foreach ($answersraw as $answer) {
$answers[] = $answer; // to renumber index 0,1,2...
}
}
print_heading_with_help(get_string("editingmultichoice", "quiz"), "multichoice", "quiz");
require("multichoice.html");
break;
case RANDOM:
print_heading_with_help(get_string("editingrandom", "quiz"), "random", "quiz");
print_continue("edit.php");
break;
default:
error("Invalid question type");
break;
}
print_footer($course);
?>
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