/**
* Serves the offlinequiz files.
*
* @param object $course
* @param object $cm
* @param object $context
* @param string $filearea
* @param array $args
* @param bool $forcedownload
* @return bool false if file not found, does not return if found - justsend the file
*/
function offlinequiz_pluginfile($course, $cm, $context, $filearea, $args, $forcedownload)
{
global $CFG, $DB, $USER;
require_once $CFG->dirroot . '/mod/offlinequiz/locallib.php';
require_once $CFG->libdir . '/questionlib.php';
if ($context->contextlevel != CONTEXT_MODULE) {
return false;
}
require_login($course, false, $cm);
if (!($offlinequiz = $DB->get_record('offlinequiz', array('id' => $cm->instance)))) {
return false;
}
// The file area 'pdfs' is served by pluginfile.php.
$fileareas = array('pdfs', 'imagefiles');
if (!in_array($filearea, $fileareas)) {
return false;
}
$fs = get_file_storage();
$relativepath = implode('/', $args);
$fullpath = '/' . $context->id . '/mod_offlinequiz/' . $filearea . '/' . $relativepath;
if (!($file = $fs->get_file_by_hash(sha1($fullpath))) or $file->is_directory()) {
return false;
}
// Teachers in this context are allowed to see all the files in the context.
if (has_capability('mod/offlinequiz:viewreports', $context)) {
if ($filearea == 'pdfs') {
$filename = clean_filename($course->shortname) . '_' . clean_filename($offlinequiz->name) . '_' . $file->get_filename();
send_stored_file($file, 86400, 0, $forcedownload, array('filename' => $filename));
} else {
send_stored_file($file, 86400, 0, $forcedownload);
}
} else {
// Get the corresponding scanned pages. There might be several in case an image file is used twice.
if (!($scannedpages = $DB->get_records('offlinequiz_scanned_pages', array('offlinequizid' => $offlinequiz->id, 'warningfilename' => $file->get_filename())))) {
if (!($scannedpages = $DB->get_records('offlinequiz_scanned_pages', array('offlinequizid' => $offlinequiz->id, 'filename' => $file->get_filename())))) {
print_error('scanned page not found');
return false;
}
}
// Actually, there should be only one scannedpage with that filename...
foreach ($scannedpages as $scannedpage) {
$sql = "SELECT *\n FROM {offlinequiz_results}\n WHERE id = :resultid\n AND status = 'complete'";
if (!($result = $DB->get_record_sql($sql, array('resultid' => $scannedpage->resultid)))) {
return false;
}
// Check whether the student is allowed to see scanned sheets.
$options = offlinequiz_get_review_options($offlinequiz, $result, $context);
if ($options->sheetfeedback == question_display_options::HIDDEN and $options->gradedsheetfeedback == question_display_options::HIDDEN) {
return false;
}
// If we found a page of a complete result that belongs to the user, we can send the file.
if ($result->userid == $USER->id) {
send_stored_file($file, 86400, 0, $forcedownload);
return true;
}
}
}
}
}
if (!($cm = get_coursemodule_from_instance("offlinequiz", $offlinequiz->id, $course->id))) {
print_error('nocm', 'offlinequiz', $CFG->wwwroot . '/course/view.php?id=' . $COURSE->id, $scannedpage->offlinequizid);
}
if (!($groups = $DB->get_records('offlinequiz_groups', array('offlinequizid' => $offlinequiz->id), 'number', '*', 0, $offlinequiz->numgroups))) {
print_error('nogroups', 'offlinequiz', $CFG->wwwroot . '/course/view.php?id=' . $COURSE->id, $scannedpage->offlinequizid);
}
require_login($course->id, false, $cm);
$context = context_module::instance($cm->id);
if (!has_capability('mod/offlinequiz:viewreports', $context) and !has_capability('mod/offlinequiz:attempt', $context)) {
print_error('noaccess', 'offlinequiz', $CFG->wwwroot . '/course/view.php?id=' . $COURSE->id, $scannedpage->offlinequizid);
}
if (!has_capability('mod/offlinequiz:viewreports', $context) and $result->userid != $USER->id) {
print_error('noaccess', 'offlinequiz', $CFG->wwwroot . '/course/view.php?id=' . $COURSE->id, $scannedpage->offlinequizid);
}
$options = offlinequiz_get_review_options($offlinequiz, $result, $context);
if (!$options->sheetfeedback and !$options->gradedsheetfeedback) {
print_error('noaccess', 'offlinequiz', $CFG->wwwroot . '/course/view.php?id=' . $COURSE->id, $scannedpage->offlinequizid);
}
$url = new moodle_url('/mod/offlinequiz/image.php', array('pageid' => $scannedpage->id, 'resultid' => $result->id));
$PAGE->set_url($url);
$PAGE->set_pagelayout('popup');
echo "<style>\n";
echo "body {margin:0px; font-family:Arial,Verdana,Helvetica,sans-serif;}\n";
echo ".imagebutton {width:250px; height:24px; text-align:left; margin-bottom:10px;}\n";
echo "</style>\n";
echo '<head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /></head>';
offlinequiz_load_useridentification();
$offlinequizconfig = get_config('offlinequiz');
$group = $groups[$result->offlinegroupid];
$offlinequiz->groupid = -$group->id;
