--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/program/steps/addressbook/undo.inc	Thu Jan 04 15:52:31 2018 -0500
@@ -0,0 +1,54 @@
+<?php
+
+/**
+ +-----------------------------------------------------------------------+
+ | program/steps/addressbook/undo.inc                                    |
+ |                                                                       |
+ | This file is part of the Roundcube Webmail client                     |
+ | Copyright (C) 2011-2013, Kolab Systems AG                             |
+ |                                                                       |
+ | 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:                                                              |
+ |   Undelete contacts (CIDs) from last delete action                    |
+ |                                                                       |
+ +-----------------------------------------------------------------------+
+ | Author: Aleksander Machniak <machniak@kolabsys.com>                   |
+ +-----------------------------------------------------------------------+
+*/
+
+// process ajax requests only
+if (!$OUTPUT->ajax_call) {
+    return;
+}
+
+$undo   = $_SESSION['contact_undo'];
+$delcnt = 0;
+
+foreach ((array)$undo['data'] as $source => $cid) {
+    $CONTACTS = rcmail_contact_source($source);
+
+    $plugin = $RCMAIL->plugins->exec_hook('contact_undelete', array(
+        'id' => $cid, 'source' => $source));
+
+    $restored = !$plugin['abort'] ? $CONTACTS->undelete($cid) : $plugin['result'];
+
+    if (!$restored) {
+        $OUTPUT->show_message($plugin['message'] ?: 'contactrestoreerror', 'error');
+        $OUTPUT->command('list_contacts');
+        $OUTPUT->send();
+    }
+    else {
+        $delcnt += $restored;
+    }
+}
+
+$RCMAIL->session->remove('contact_undo');
+
+$OUTPUT->show_message('contactrestored', 'confirmation');
+$OUTPUT->command('list_contacts');
+
+// send response
+$OUTPUT->send();