--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/program/steps/mail/getunread.inc	Thu Jan 04 15:52:31 2018 -0500
@@ -0,0 +1,56 @@
+<?php
+
+/**
+ +-----------------------------------------------------------------------+
+ | program/steps/mail/getunread.inc                                      |
+ |                                                                       |
+ | This file is part of the Roundcube Webmail client                     |
+ | Copyright (C) 2005-2013, The Roundcube Dev Team                       |
+ |                                                                       |
+ | Licensed under the GNU General Public License version 3 or            |
+ | any later version with exceptions for skins & plugins.                |
+ | See the README file for a full license statement.                     |
+ |                                                                       |
+ | PURPOSE:                                                              |
+ |   Check all mailboxes for unread messages and update GUI              |
+ |                                                                       |
+ +-----------------------------------------------------------------------+
+ | Author: Thomas Bruederli <roundcube@gmail.com>                        |
+ +-----------------------------------------------------------------------+
+*/
+
+$a_folders = $RCMAIL->storage->list_folders_subscribed('', '*', 'mail');
+
+if (!empty($a_folders)) {
+    $current   = $RCMAIL->storage->get_folder();
+    $inbox     = ($current == 'INBOX');
+    $trash     = $RCMAIL->config->get('trash_mbox');
+    $check_all = (bool)$RCMAIL->config->get('check_all_folders');
+
+    foreach ($a_folders as $mbox) {
+        $unseen_old = rcmail_get_unseen_count($mbox);
+
+        if (!$check_all && $unseen_old !== null && $mbox != $current) {
+            $unseen = $unseen_old;
+        }
+        else {
+            $unseen = $RCMAIL->storage->count($mbox, 'UNSEEN', $unseen_old === null);
+        }
+
+        // call it always for current folder, so it can update counter
+        // after possible message status change when opening a message
+        // not in preview frame
+        if ($unseen || $unseen_old === null || $mbox == $current) {
+            $OUTPUT->command('set_unread_count', $mbox, $unseen, $inbox && $mbox_row == 'INBOX');
+        }
+
+        rcmail_set_unseen_count($mbox, $unseen);
+
+        // set trash folder state
+        if ($mbox === $trash) {
+            $OUTPUT->command('set_trash_count', $RCMAIL->storage->count($mbox, 'EXISTS'));
+        }
+    }
+}
+
+$OUTPUT->send();