function display($quiz, $cm, $course)
{
global $CFG;
// Print header
$this->print_header_and_tabs($cm, $course, $quiz, $reportmode = "regrade");
// Check permissions
$context = get_context_instance(CONTEXT_MODULE, $cm->id);
if (!has_capability('mod/quiz:grade', $context)) {
notify(get_string('regradenotallowed', 'quiz'));
return true;
}
// Fetch all attempts
if (!($attempts = get_records_select('quiz_attempts', "quiz = '{$quiz->id}' AND preview = 0"))) {
print_heading(get_string('noattempts', 'quiz'));
return true;
}
// Fetch all questions
$sql = "SELECT q.*, i.grade AS maxgrade FROM {$CFG->prefix}question q,\n {$CFG->prefix}quiz_question_instances i\n WHERE i.quiz = {$quiz->id}\n AND i.question = q.id";
if (!($questions = get_records_sql($sql))) {
error("Failed to get questions for regrading!");
}
get_question_options($questions);
// Print heading
print_heading(get_string('regradingquiz', 'quiz', format_string($quiz->name)));
echo '<div class="boxaligncenter">';
print_string('regradedisplayexplanation', 'quiz');
echo '</div>';
// Loop through all questions and all attempts and regrade while printing progress info
foreach ($questions as $question) {
echo '<strong>' . get_string('regradingquestion', 'quiz', $question->name) . '</strong> ' . get_string('attempts', 'quiz') . ": \n";
foreach ($attempts as $attempt) {
set_time_limit(30);
$changed = regrade_question_in_attempt($question, $attempt, $quiz, true);
if ($changed) {
link_to_popup_window('/mod/quiz/reviewquestion.php?attempt=' . $attempt->id . '&question=' . $question->id, 'reviewquestion', ' #' . $attempt->id, 450, 550, get_string('reviewresponse', 'quiz'));
} else {
echo ' #' . $attempt->id;
}
}
echo '<br />';
// the following makes sure that the output is sent immediately.
@flush();
@ob_flush();
}
// Loop through all questions and recalculate $attempt->sumgrade
$attemptschanged = 0;
foreach ($attempts as $attempt) {
$sumgrades = 0;
$questionids = explode(',', quiz_questions_in_quiz($attempt->layout));
foreach ($questionids as $questionid) {
$lastgradedid = get_field('question_sessions', 'newgraded', 'attemptid', $attempt->uniqueid, 'questionid', $questionid);
$sumgrades += get_field('question_states', 'grade', 'id', $lastgradedid);
}
if ($attempt->sumgrades != $sumgrades) {
$attemptschanged++;
set_field('quiz_attempts', 'sumgrades', $sumgrades, 'id', $attempt->id);
}
}
// Update the overall quiz grades
if ($grades = get_records('quiz_grades', 'quiz', $quiz->id)) {
foreach ($grades as $grade) {
quiz_save_best_grade($quiz, $grade->userid);
}
}
return true;
}
function regrade_selected_attempts($quiz, $attemptids, $groupstudents) {
global $DB;
require_capability('mod/quiz:regrade', $this->context);
if ($groupstudents) {
list($usql, $params) = $DB->get_in_or_equal($groupstudents);
$where = "qa.userid $usql AND ";
} else {
$params = array();
$where = '';
}
list($asql, $aparams) = $DB->get_in_or_equal($attemptids);
$where = "qa.id $asql AND ";
$params = array_merge($params, $aparams);
$where .= "qa.quiz = ? AND qa.preview = 0";
$params[] = $quiz->id;
if (!$attempts = $DB->get_records_sql('SELECT qa.* FROM {quiz_attempts} qa WHERE '. $where, $params)) {
print_error('noattemptstoregrade', 'quiz_overview');
}
// Fetch all questions
$questions = question_load_questions(explode(',',quiz_questions_in_quiz($quiz->questions)), 'qqi.grade AS maxgrade, qqi.id AS instance',
'{quiz_question_instances} qqi ON qqi.quiz = ' . $quiz->id . ' AND q.id = qqi.question');
$updateoverallgrades = array();
foreach($attempts as $attempt) {
foreach ($questions as $question) {
$changed = regrade_question_in_attempt($question, $attempt, $quiz, true);
}
$updateoverallgrades[] = $attempt->uniqueid;
}
$this->check_overall_grades($quiz, array(), $updateoverallgrades);
}
