--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/program/steps/mail/copy.inc	Thu Jan 04 15:52:31 2018 -0500
@@ -0,0 +1,62 @@
+<?php
+
+/**
+ +-----------------------------------------------------------------------+
+ | program/steps/mail/copy.inc                                           |
+ |                                                                       |
+ | This file is part of the Roundcube Webmail client                     |
+ | Copyright (C) 2005-2014, 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:                                                              |
+ |   Copy the submitted messages to a specific mailbox                   |
+ |                                                                       |
+ +-----------------------------------------------------------------------+
+ | Author: Aleksander Machniak <alec@alec.pl>                            |
+ +-----------------------------------------------------------------------+
+*/
+
+// only process ajax requests
+if (!$OUTPUT->ajax_call) {
+    return;
+}
+
+// copy messages
+if (!empty($_POST['_uid']) && strlen($_POST['_target_mbox'])) {
+    $target  = rcube_utils::get_input_value('_target_mbox', rcube_utils::INPUT_POST, true);
+    $sources = array();
+
+    foreach (rcmail::get_uids(null, null, $multifolder) as $mbox => $uids) {
+        if ($mbox === $target) {
+            $copied++;
+        }
+        else {
+            $copied += (int)$RCMAIL->storage->copy_message($uids, $target, $mbox);
+            $sources[] = $mbox;
+        }
+    }
+
+    if (!$copied) {
+        // send error message
+        $RCMAIL->display_server_error('errorcopying');
+        $OUTPUT->send();
+        exit;
+    }
+    else {
+        $OUTPUT->show_message('messagecopied', 'confirmation');
+    }
+
+    rcmail_send_unread_count($target, true);
+
+    $OUTPUT->command('set_quota', $RCMAIL->quota_content(null, $multifolder ? $sources[0] : 'INBOX'));
+}
+// unknown action or missing query param
+else {
+    $OUTPUT->show_message('internalerror', 'error');
+}
+
+// send response
+$OUTPUT->send();