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298 lines
10 KiB
PHP
298 lines
10 KiB
PHP
<?php // $Id$
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// This code has been adapted from mod/quiz/attempt.php
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// if called only with parameter = q, it returns an imsmanifest in xml format
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// if the results are submitted, it saves the results
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require_once("../../config.php");
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//require_once("lib.php"); //for version 1.4.x
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require_once("locallib.php"); //for version 1.5.x
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optional_variable($id); // Course Module ID, or
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optional_variable($q); // quiz ID
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optional_variable ($questionIds); // set of questionids. if present, only these questions from the quiz will be exported.
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optional_variable($lang);
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global $USER, $CFG;
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if ($id) {
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if (! $cm = get_record("course_modules", "id", $id)) {
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error("Course Module ID was incorrect");
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}
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if (! $course = get_record("course", "id", $cm->course)) {
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error("Course is misconfigured");
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}
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if (! $quiz = get_record("quiz", "id", $cm->instance)) {
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error("Course module is incorrect");
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}
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} else {
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if (! $quiz = get_record("quiz", "id", $q)) {
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error("Course module is incorrect");
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}
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if (! $course = get_record("course", "id", $quiz->course)) {
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error("Course is misconfigured");
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}
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if (! $cm = get_coursemodule_from_instance("quiz", $quiz->id, $course->id)) {
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error("Course Module ID was incorrect");
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}
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}
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require_login($course->id);
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if (!$lang) {
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empty($USER->lang) ? 'de' : $USER->lang;
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}
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/// Set number for next attempt:
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if ($attempts = quiz_get_user_attempts($quiz->id, $USER->id)) {
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$attemptnumber = 2;
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foreach ($attempts as $attempt) {
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if ($attempt->attempt >= $attemptnumber) {
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$attemptnumber = $attempt->attempt + 1;
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}
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}
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} else {
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$attemptnumber = 1;
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}
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$strattemptnum = get_string("attempt", "quiz", $attemptnumber);
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/// Check availability
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if ($quiz->attempts and $attempts and count($attempts) >= $quiz->attempts) {
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error("Sorry, you've had $quiz->attempts attempts already.", "view.php?id=$cm->id");
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}
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/// Check subnet access
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if ($quiz->subnet and !address_in_subnet(getremoteaddr(), $quiz->subnet)) {
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error(get_string("subneterror", "quiz"), "view.php?id=$cm->id");
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}
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/// Check password access
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if ($quiz->password and empty($_POST['q'])) {
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if (empty($_POST['quizpassword'])) {
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print_heading($quiz->name);
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print_heading(get_string("attempt", "quiz", $attemptnumber));
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if (trim(strip_tags($quiz->intro))) {
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print_simple_box(format_text($quiz->intro), "CENTER");
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}
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echo "<br />\n";
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echo "<form name=\"passwordform\" method=\"post\" action=\"attempt.php?id=$cm->id\">\n";
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print_simple_box_start("center");
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echo "<div align=\"center\">\n";
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print_string("requirepasswordmessage", "quiz");
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echo "<br /><br />\n";
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echo " <input name=\"quizpassword\" type=\"password\" value=\"\" />";
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echo " <input type=\"submit\" value=\"".get_string("ok")."\" />\n";
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echo "</div>\n";
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print_simple_box_end();
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echo "</form>\n";
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print_footer();
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exit;
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} else {
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if (strcmp($quiz->password, $_POST['quizpassword']) !== 0) {
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error(get_string("passworderror", "quiz"), "view.php?id=$cm->id");
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}
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unset($_POST['quizpassword']); /// needed so as not to confuse later code dealing with submitted answers
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}
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}
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// $unattempt = quiz_get_user_attempt_unfinished($quiz->id, $USER->id);
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$timenow = time();
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$available = ($quiz->timeopen < $timenow and $timenow < $quiz->timeclose);
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/// Check to see if they are submitting answers
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if ($rawanswers = data_submitted()) {
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$error = null;
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$rawanswers = (array)$rawanswers;
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$shuffleorder = NULL;
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unset($rawanswers["q"]); // quiz id
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if (! count($rawanswers) and ! $timelimit) {
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frageplayer_error(get_string("noanswers", "quiz"));
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}
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if (!$questions = get_records_list("quiz_questions", "id", $quiz->questions)) {
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frageplayer_error('No questions found while trying to grade test attempt!');
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}
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foreach ($rawanswers as $key => $value) { // Parse input for question->response
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if ($postedquestionid = quiz_extract_posted_id($key)) {
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$questions[$postedquestionid]->response[$key] = trim($value);
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} else if ('shuffleorder' == $key) {
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$shuffleorder = explode(",", $value); // Actual order questions were given in
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} else { // Useful for debugging new question types. Must be last.
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$error .= "Unrecognizable input has been posted ($key -> $value)...";
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}
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}
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if (!is_null($error)) {
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frageplayer_error($error);
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}
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/// Retrieve ->maxgrade for all questions
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If (!($grades = quiz_get_question_grades($quiz->id, $quiz->questions))) {
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$grades = array();
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}
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foreach ($grades as $qid => $grade) {
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$questions[$qid]->maxgrade = $grade->grade;
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}
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if (isset($timesincestart)) {
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$quiz->timesincestart = $timesincestart; // To pass it on to quiz_grade_responses
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}
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if (!$result = quiz_grade_responses($quiz, $questions)) {
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frageplayer_error("Could not grade your quiz attempt");
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}
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if ($attempt = quiz_save_attempt($quiz, $questions, $result, $attemptnumber)) {
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add_to_log($course->id, "quiz", "submit",
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"review.php?id=$cm->id&attempt=$attempt->id", "$quiz->id", $cm->id);
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} else {
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frageplayer_error(get_string("alreadysubmitted", "quiz"));
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}
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if (! quiz_save_best_grade($quiz, $USER->id)) {
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frageplayer_error("Sorry! Could not calculate your best grade!");
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}
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if ($quiz->grade) {
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$strgrade = get_string("grade");
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$strscore = get_string("score", "quiz");
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frageplayer_success("$strscore: $result->sumgrades/$quiz->sumgrades ($result->percentage %)"
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. "$strgrade: $result->grade/$quiz->grade");
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} else {
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// todo: ungraded quiz response
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frageplayer_success("Ungraded quiz OK");
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}
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// we shouldn't get here ...
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echo "&success=unknown";
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exit;
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}
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/// Actually seeing the questions marks the start of an attempt
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if (isset($unattempt) && $unattempt) {
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$attempt = $unattempt;
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} else if ($attempt = quiz_start_attempt($quiz->id, $USER->id, $attemptnumber)) {
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add_to_log($course->id, "quiz", "attempt",
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"review.php?id=$cm->id&attempt=$attempt->id", "$quiz->id", $cm->id);
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} else {
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frageplayer_error("Sorry! Could not start the quiz (could not save starting time)");
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}
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if (!$available) {
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frageplayer_error("Sorry, this quiz is not available");
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}
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/// Export all the questions
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$questions = quiz_get_attempt_questions($quiz, $attempt, true);
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if ($questionIds){
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$subSetOfQuestions = array ();
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$questionIds = explode ("_", $questionIds);
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foreach ($questions as $key => $question){
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if (in_array ($key, $questionIds)){
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$subSetOfQuestions[$key] = $question;
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}
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}
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$questions = $subSetOfQuestions;
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}
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/*
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echo "<pre>";
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print (var_export ($questions, 1));
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die();
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*/
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if ($quiz->attemptonlast && $attemptnumber >= 2 and
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$quiz->attempts == 0 || !unattempt) {
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// There are unlimited attempts or it is a new attempt.
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// As the attempt also builds on the last, we can here
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// have the student see the scores of the pre-entered
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// responses that we here will have graded:
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$result = quiz_grade_responses($quiz, $questions);
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$result->attemptbuildsonthelast = true;
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} else {
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$result = NULL;
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}
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// we want all information in the ims export, so the below was commented out
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// the qti player can determine how it wants to handle it.
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/*// We do not show feedback or correct answers during an attempt:
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// changed from false to '0' to get a meaningful qti export
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$quiz->feedback = $quiz->correctanswers = 0;*/
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if (!$quiz->feedback) {
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$quiz->feedback = 0;
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}
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if (!$quiz->correctanswers) {
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$quiz->correctanswers = 0;
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}
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// shuffle the order of the questions
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if (!$shuffleorder) {
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if (!empty($quiz->shufflequestions)) { // Mix everything up
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$questions = swapshuffle_assoc($questions);
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} else {
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if ($questionIds) {
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// only a subset of questions are being used
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$shuffleorder = $questionIds;
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} else {
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$shuffleorder = explode(",", $quiz->questions); // Use originally defined order
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}
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}
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}
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if ($shuffleorder) { // Order has been defined, so reorder questions
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$oldquestions = $questions;
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$questions = array();
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foreach ($shuffleorder as $key) {
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$questions[] = $oldquestions[$key]; // This loses the index key, but doesn't matter
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}
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}
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// create the imsmanifest file
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require("format.php"); // Parent class
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require("format/qti/format.php");
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$redirecturl = "{$CFG->wwwroot}/mod/quiz/index.php?id={$course->id}";
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//$submiturl = "{$CFG->wwwroot}/mod/quiz/attempt.php?q={$quiz->id}";
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$submiturl = "{$CFG->wwwroot}/mod/quiz/imsattempt.php";
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$format = new quiz_file_format();
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$format->export_quiz($course, $quiz, $questions, $result, $redirecturl, $submiturl);
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function frageplayer_error($errorstr, $exit = true) {
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echo "&success=false&faultstring=$errorstr";
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if ($exit) {
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exit;
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}
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}
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function frageplayer_success($successstr, $exit = true) {
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echo "&success=true&resultstring=$successstr&";
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if ($exit) {
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exit;
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}
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}
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?>
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