public function DownloadUserReport()
 {
     $vs_download_format = $this->request->getParameter("download_format", pString);
     if (!$vs_download_format) {
         $vs_download_format = "tab";
     }
     $this->view->setVar("download_format", $vs_download_format);
     switch ($vs_download_format) {
         default:
         case "tab":
             $this->view->setVar("file_extension", "txt");
             $this->view->setVar("mimetype", "text/plain");
             $vs_delimiter_col = "\t";
             $vs_delimiter_row = "\n";
             break;
             # -----------------------------------
         # -----------------------------------
         case "csv":
             $this->view->setVar("file_extension", "txt");
             $this->view->setVar("mimetype", "text/plain");
             $vs_delimiter_col = ",";
             $vs_delimiter_row = "\n";
             break;
             # -----------------------------------
     }
     $o_db = new Db();
     $t_user = new ca_users();
     $va_fields = array("lname", "fname", "email", "user_name", "userclass", "active", "last_login");
     $va_profile_prefs = $t_user->getValidPreferences('profile');
     $va_profile_prefs_labels = array();
     foreach ($va_profile_prefs as $vs_pref) {
         $va_pref_info = $t_user->getPreferenceInfo($vs_pref);
         $va_profile_prefs_labels[$vs_pref] = $va_pref_info["label"];
     }
     $qr_users = $o_db->query("SELECT * FROM ca_users ORDER BY user_id DESC");
     if ($qr_users->numRows()) {
         $va_rows = array();
         # --- headings
         $va_row = array();
         # --- headings for field values
         foreach ($va_fields as $vs_field) {
             switch ($vs_field) {
                 case "last_login":
                     $va_row[] = _t("Last login");
                     break;
                     # --------------------
                 # --------------------
                 default:
                     $va_row[] = $t_user->getDisplayLabel("ca_users." . $vs_field);
                     break;
                     # --------------------
             }
         }
         # --- headings for profile prefs
         foreach ($va_profile_prefs_labels as $vs_pref => $vs_pref_label) {
             $va_row[] = $vs_pref_label;
         }
         $va_rows[] = join($vs_delimiter_col, $va_row);
         reset($va_fields);
         reset($va_profile_prefs_labels);
         $o_tep = new TimeExpressionParser();
         while ($qr_users->nextRow()) {
             $va_row = array();
             # --- fields
             foreach ($va_fields as $vs_field) {
                 switch ($vs_field) {
                     case "userclass":
                         $va_row[] = $t_user->getChoiceListValue($vs_field, $qr_users->get("ca_users." . $vs_field));
                         break;
                         # -----------------------
                     # -----------------------
                     case "active":
                         $va_row[] = $qr_users->get("ca_users." . $vs_field) == 1 ? _t("active") : _t("not active");
                         break;
                         # -----------------------
                     # -----------------------
                     case "last_login":
                         //if (!is_array($va_vars = $qr_users->getVars('vars'))) { $va_vars = array(); }
                         if (!is_array($va_vars = $qr_users->getVars('volatile_vars'))) {
                             $va_vars = array();
                         }
                         if ($va_vars['last_login'] > 0) {
                             $o_tep->setUnixTimestamps($va_vars['last_login'], $va_vars['last_login']);
                             $va_row[] = $o_tep->getText();
                         } else {
                             $va_row[] = "-";
                         }
                         break;
                         # -----------------------
                     # -----------------------
                     default:
                         if ($vs_download_format == "csv") {
                             $va_row[] = str_replace(",", "-", $qr_users->get("ca_users." . $vs_field));
                         } else {
                             $va_row[] = $qr_users->get("ca_users." . $vs_field);
                         }
                         break;
                         # -----------------------
                 }
             }
             # --- profile prefs
             foreach ($va_profile_prefs_labels as $vs_pref => $vs_pref_label) {
                 $t_user->load($qr_users->get("ca_users.user_id"));
                 $va_row[] = $t_user->getPreference($vs_pref);
             }
             $va_rows[] = join($vs_delimiter_col, $va_row);
         }
         $vs_file_contents = join($vs_delimiter_row, $va_rows);
         $this->view->setVar("file_contents", $vs_file_contents);
         return $this->render('user_report.php');
     } else {
         $this->notification->addNotification(_t("There are no users"), __NOTIFICATION_TYPE_INFO__);
         $this->ListUsers();
         return;
     }
 }