$courseid, $context, $correction = false) {

global $CFG, $DB, $OUTPUT;

$letterstr = 'abcdefghijklmnopqrstuvwxyz';

$groupletter = strtoupper($letterstr[$group->number - 1]);

$coursecontext = context_course::instance($courseid);

$course = $DB->get_record('course', array('id' => $courseid));

$title = format_text($offlinequiz->name, FORMAT_HTML);

$title .= ", " . get_string('group') . $groupletter;

// Load all the questions needed for this offline quiz group.

$sql = "SELECT q.*, c.contextid, ogq.page, ogq.slot, ogq.maxmark

FROM {offlinequiz_group_questions} ogq,

{question} q,

{question_categories} c

WHERE ogq.offlinequizid = :offlinequizid

AND ogq.offlinegroupid = :offlinegroupid

AND q.id = ogq.questionid

AND q.category = c.id

ORDER BY ogq.slot ASC ";

$params = array('offlinequizid' => $offlinequiz->id, 'offlinegroupid' => $group->id);

// Load the questions.

$questions = $DB->get_records_sql($sql, $params);

if (!$questions) {

echo $OUTPUT->box_start();

echo $OUTPUT->error_text(get_string('noquestionsfound', 'offlinequiz', $groupletter));

echo $OUTPUT->box_end();

return;

}

// Load the question type specific information.

if (!get_question_options($questions)) {

print_error('Could not load question options');

}

$number = 1;

// We need a mapping from question IDs to slots, assuming that each question occurs only once.

$slots = $templateusage->get_slots();

$latexforquestions = '\begin{enumerate}' . "\n";

// If shufflequestions has been activated we go through the questions in the order determined by

// the template question usage.

if ($offlinequiz->shufflequestions) {

foreach ($slots as $slot) {

$slotquestion = $templateusage->get_question($slot);

$currentquestionid = $slotquestion->id;

$question = $questions[$currentquestionid];

$questiontext = offlinequiz_convert_html_to_latex($question->questiontext);

$latexforquestions .= '\item ' . $questiontext . "\n";

if ($question->qtype == 'multichoice' || $question->qtype == 'multichoiceset') {

// There is only a slot for multichoice questions.

$attempt = $templateusage->get_question_attempt($slot);

$order = $slotquestion->get_order($attempt); // Order of the answers.

$latexforquestions .= '\begin{enumerate}' . " \n";

foreach ($order as $key => $answer) {

$latexforquestions .= offlinequiz_get_answer_latex($question, $answer);

}

$latexforquestions .= '\end{enumerate}' . "\n";

$infostr = offlinequiz_get_question_infostring($offlinequiz, $question);

if ($infostr) {

$latexforquestions .= $infostr . "\n";

}

}

}

$latexforquestions .= '\end{enumerate}' . "\n";

} else {

// No shufflequestions, so go through the questions as they have been added to the offlinequiz group.

// We also have to show description questions that are not in the template.

// First, compute mapping questionid -> slotnumber.

$questionslots = array();

foreach ($slots as $slot) {

$questionslots[$templateusage->get_question($slot)->id] = $slot;

}

foreach ($questions as $question) {

$currentquestionid = $question->id;

$questiontext = $question->questiontext;

$questiontext = offlinequiz_convert_html_to_latex($question->questiontext);

if ($question->qtype == 'description') {

$latexforquestions .= "\n" . '\\ ' . $questiontext . "\n";

} else {

$latexforquestions .= '\item ' . $questiontext . "\n";

}

if ($question->qtype == 'multichoice' || $question->qtype == 'multichoiceset') {

$slot = $questionslots[$currentquestionid];

// There is only a slot for multichoice questions.

$slotquestion = $templateusage->get_question ( $slot );

$attempt = $templateusage->get_question_attempt ( $slot );

$order = $slotquestion->get_order ( $attempt ); // Order of the answers.

$latexforquestions .= '\begin{enumerate}' . " \n";

foreach ($order as $key => $answer) {

$latexforquestions .= offlinequiz_get_answer_latex($question, $answer);

}

$latexforquestions .= '\end{enumerate}' . "\n";

$infostr = offlinequiz_get_question_infostring($offlinequiz, $question);

if ($infostr) {

$latexforquestions .= $infostr . "\n";

}

}

}

$latexforquestions .= '\end{enumerate}' . "\n";

}

$a = array();

$a['latexforquestions'] = $latexforquestions;

$a['coursename'] = offlinequiz_convert_html_to_latex($course->fullname);

$a['groupname'] = $groupletter;

// TODO exceptionhandling?

if ($offlinequiz->time) {

$a['date'] = ', ' . userdate($offlinequiz->time);

} else {

$a['date'] = '';

}

$latex = get_string('questionsheetlatextemplate', 'offlinequiz', $a);

$fs = get_file_storage();

$fileprefix = get_string('fileprefixform', 'offlinequiz');

// Prepare file record object.

$date = usergetdate(time());

$timestamp = sprintf('%04d%02d%02d_%02d%02d%02d',

$date['year'], $date['mon'], $date['mday'], $date['hours'], $date['minutes'], $date['seconds']);

$fileinfo = array(

'contextid' => $context->id,

'component' => 'mod_offlinequiz',

'filearea' => 'pdfs',

'filepath' => '/',

'itemid' => 0,

'filename' => $fileprefix . '_' . $groupletter . '_' . $timestamp . '.tex');

if ($oldfile = $fs->get_file($fileinfo['contextid'], $fileinfo['component'], $fileinfo['filearea'],

$fileinfo['itemid'], $fileinfo['filepath'], $fileinfo['filename'])) {

$oldfile->delete();

}

$file = $fs->create_file_from_string($fileinfo, $latex);

return $file;

$conversiontable = array(

'Ä' => '{\"A}',

'ä' => '{\"a}',

'Ö' => '{\"O}',

'ö' => '{\"o}',

'Ü' => '{\"U}',

'ü' => '{\"u}',

'ß' => '{\ss}',

' ' => ' ',

'#' => '\#',

'%' => '\%'

);

// Remove all HTML comments (typically from MS Office).

$text = preg_replace("/<!--.*?--\s*>/ms", "", $text);

// Remove all paragraph tags because they mess up the layout.

$text = preg_replace("/<p[^>]*>/ms", "", $text);

$text = preg_replace("/<\/p[^>]*>/ms", "", $text);

// Remove <script> tags that are created by mathjax preview.

$text = preg_replace("/<script[^>]*>[^<]*<\/script>/ms", "", $text);

$text = strip_tags($text);

foreach ($conversiontable as $search => $replace) {

$text = str_ireplace($search, $replace, $text);

}

return $text;

$answertext = $question->options->answers[$answer]->answer;

$answertext = offlinequiz_convert_html_to_latex($answertext);

if ($question->options->answers [$answer]->fraction > 0) {

$result = '\item\answerIs{true} ' . $answertext;

} else {

$result = '\item\answerIs{false} ' . $answertext;

}

$result .= "\n";

return $result;

}