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