/**
* Download a zip file of all assignment submissions.
*
* @return string - If an error occurs, this will contain the error page.
*/
protected function download_submissions()
{
global $CFG, $DB;
// More efficient to load this here.
require_once $CFG->libdir . '/filelib.php';
require_capability('mod/assign:grade', $this->context);
// Load all users with submit.
$students = get_enrolled_users($this->context, "mod/assign:submit", null, 'u.*', null, null, null, $this->show_only_active_users());
// Build a list of files to zip.
$filesforzipping = array();
$fs = get_file_storage();
$groupmode = groups_get_activity_groupmode($this->get_course_module());
// All users.
$groupid = 0;
$groupname = '';
if ($groupmode) {
$groupid = groups_get_activity_group($this->get_course_module(), true);
$groupname = groups_get_group_name($groupid) . '-';
}
// Construct the zip file name.
$filename = clean_filename($this->get_course()->shortname . '-' . $this->get_instance()->name . '-' . $groupname . $this->get_course_module()->id . '.zip');
// Get all the files for each student.
foreach ($students as $student) {
$userid = $student->id;
if (groups_is_member($groupid, $userid) or !$groupmode or !$groupid) {
// Get the plugins to add their own files to the zip.
$submissiongroup = false;
$groupname = '';
if ($this->get_instance()->teamsubmission) {
$submission = $this->get_group_submission($userid, 0, false);
$submissiongroup = $this->get_submission_group($userid);
if ($submissiongroup) {
$groupname = $submissiongroup->name . '-';
} else {
$groupname = get_string('defaultteam', 'assign') . '-';
}
} else {
$submission = $this->get_user_submission($userid, false);
}
if ($this->is_blind_marking()) {
$prefix = str_replace('_', ' ', $groupname . get_string('participant', 'assign'));
$prefix = clean_filename($prefix . '_' . $this->get_uniqueid_for_user($userid) . '_');
} else {
$prefix = str_replace('_', ' ', $groupname . fullname($student));
$prefix = clean_filename($prefix . '_' . $this->get_uniqueid_for_user($userid) . '_');
}
if ($submission) {
foreach ($this->submissionplugins as $plugin) {
if ($plugin->is_enabled() && $plugin->is_visible()) {
$pluginfiles = $plugin->get_files($submission, $student);
foreach ($pluginfiles as $zipfilename => $file) {
$subtype = $plugin->get_subtype();
$type = $plugin->get_type();
$prefixedfilename = clean_filename($prefix . $subtype . '_' . $type . '_' . $zipfilename);
$filesforzipping[$prefixedfilename] = $file;
}
}
}
}
}
}
$result = '';
if (count($filesforzipping) == 0) {
$header = new assign_header($this->get_instance(), $this->get_context(), '', $this->get_course_module()->id, get_string('downloadall', 'assign'));
$result .= $this->get_renderer()->render($header);
$result .= $this->get_renderer()->notification(get_string('nosubmission', 'assign'));
$url = new moodle_url('/mod/assign/view.php', array('id' => $this->get_course_module()->id, 'action' => 'grading'));
$result .= $this->get_renderer()->continue_button($url);
$result .= $this->view_footer();
} else {
if ($zipfile = $this->pack_files($filesforzipping)) {
$addtolog = $this->add_to_log('download all submissions', get_string('downloadall', 'assign'), '', true);
$params = array('context' => $this->context, 'objectid' => $this->get_instance()->id);
$event = \mod_assign\event\all_submissions_downloaded::create($params);
$event->set_legacy_logdata($addtolog);
$event->trigger();
// Send file and delete after sending.
send_temp_file($zipfile, $filename);
// We will not get here - send_temp_file calls exit.
}
}
return $result;
}
