function plagiarism_urkund_send_files()
{
    global $DB, $CFG;
    $plagiarismsettings = plagiarism_plugin_urkund::get_settings();
    if (!empty($plagiarismsettings)) {
        // Get all files in a pending state.
        $plagiarismfiles = $DB->get_records("plagiarism_urkund_files", array("statuscode" => "pending"));
        foreach ($plagiarismfiles as $pf) {
            // Check to make sure cm exists. - delete record if cm has been deleted.
            $sql = "SELECT m.name\n                      FROM {modules} m\n                      JOIN {course_modules} cm ON cm.module = m.id\n                     WHERE cm.id = ?";
            $modulename = $DB->get_field_sql($sql, array($pf->cm));
            if (empty($modulename)) {
                // The coursemodule related to this file has been deleted, delete the urkund entry.
                mtrace("URKUND fileid:{$pf->id} Course module id:" . $pf->cm . " does not exist, deleting record");
                $DB->delete_records('plagiarism_urkund_files', array('id' => $pf->id));
                continue;
            }
            mtrace("URKUND fileid:" . $pf->id . ' sending for processing');
            $file = plagiarism_urkund_get_file_object($pf);
            if (empty($file)) {
                continue;
            }
            if ($module = "assign") {
                // Check for group assignment and adjust userid if required.
                // This prevents subsequent group submissions from flagging a previous submission as a match.
                $pf = plagiarism_urkund_check_group($pf);
            }
            if (!empty($file)) {
                urkund_send_file_to_urkund($pf, $plagiarismsettings, $file);
            } else {
                $DB->delete_records('plagiarism_urkund_files', array('id' => $pf->id));
                mtrace("URKUND fileid:{$pf->id} File not found, this may have been replaced by a newer file - deleting record");
            }
        }
    }
}
function urkund_send_file($cmid, $userid, $file, $plagiarismsettings)
{
    global $DB;
    $plagiarismfile = urkund_get_plagiarism_file($cmid, $userid, $file);
    // Check if $plagiarismfile actually needs to be submitted.
    if ($plagiarismfile->statuscode != 'pending') {
        return true;
    }
    $filename = !empty($file->filename) ? $file->filename : $file->get_filename();
    if ($plagiarismfile->filename !== $filename) {
        // This is a file that was previously submitted and not sent to urkund but the filename has changed so fix it.
        $plagiarismfile->filename = $filename;
        $DB->update_record('plagiarism_urkund_files', $plagiarismfile);
    }
    // Check to see if this is a valid file.
    $mimetype = urkund_check_file_type($filename);
    if (empty($mimetype)) {
        $plagiarismfile->statuscode = URKUND_STATUSCODE_UNSUPPORTED;
        $DB->update_record('plagiarism_urkund_files', $plagiarismfile);
        return true;
    }
    // Increment attempt number.
    $plagiarismfile->attempt = $plagiarismfile->attempt++;
    $DB->update_record('plagiarism_urkund_files', $plagiarismfile);
    return urkund_send_file_to_urkund($plagiarismfile, $plagiarismsettings, $file);
}