From 01335f787d3652db37a7f611c6d89197c038ebfd Mon Sep 17 00:00:00 2001
From: Ralf Becker <RalfBecker@outdoor-training.de>
Date: Fri, 14 Aug 2020 18:03:30 +0200
Subject: [PATCH] * Calendar/CalDAV: config to replace email-domain eg. for a
 migration

---
 api/src/CalDAV/Principals.php            |  7 +++++++
 calendar/inc/class.calendar_ical.inc.php |  7 +++++++
 calendar/templates/default/config.xet    | 12 +++++++++++-
 3 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/api/src/CalDAV/Principals.php b/api/src/CalDAV/Principals.php
index df0a59aaad..2f63cde115 100644
--- a/api/src/CalDAV/Principals.php
+++ b/api/src/CalDAV/Principals.php
@@ -1033,6 +1033,13 @@ class Principals extends Handler
 				break;
 
 			case 'mailto':
+				// check if we need to replace email domain with something else in participants (mail address migration)
+				if (!empty($rest) && !empty($GLOBALS['egw_info']['server']['calendar_domain_replace']) &&
+					!empty($GLOBALS['egw_info']['server']['calendar_domain_replace_with']))
+				{
+					$rest = preg_replace('/@' . preg_quote($GLOBALS['egw_info']['server']['calendar_domain_replace'], '/') . '(>|$)/i',
+						'@' . $GLOBALS['egw_info']['server']['calendar_domain_replace_with'] . '$1', $e = $rest);
+				}
 				if (($uid = $GLOBALS['egw']->accounts->name2id($rest, 'account_email')))
 				{
 					$type = $uid > 0 ? 'users' : 'groups';
diff --git a/calendar/inc/class.calendar_ical.inc.php b/calendar/inc/class.calendar_ical.inc.php
index 5314499e25..76ac9a1187 100644
--- a/calendar/inc/class.calendar_ical.inc.php
+++ b/calendar/inc/class.calendar_ical.inc.php
@@ -2797,6 +2797,13 @@ class calendar_ical extends calendar_boupdate
 					{
 						$email = $attributes['value'];
 					}
+					// check if we need to replace email domain with something else in participants (mail address migration)
+					if (!empty($email) && !empty($GLOBALS['egw_info']['server']['calendar_domain_replace']) &&
+						!empty($GLOBALS['egw_info']['server']['calendar_domain_replace_with']))
+					{
+						$email = preg_replace('/@'.preg_quote($GLOBALS['egw_info']['server']['calendar_domain_replace'], '/').'(>|$)/i',
+							'@'.$GLOBALS['egw_info']['server']['calendar_domain_replace_with'].'$1', $e=$email);
+					}
 					// try X-EGROUPWARE-UID, but only if it resolves to same email (otherwise we are in trouble if different EGw installs talk to each other)
 					if (!$uid && !empty($attributes['params']['X-EGROUPWARE-UID']) &&
 						($res_info = $this->resource_info($attributes['params']['X-EGROUPWARE-UID'])) &&
diff --git a/calendar/templates/default/config.xet b/calendar/templates/default/config.xet
index 16c5503857..18249cabe6 100644
--- a/calendar/templates/default/config.xet
+++ b/calendar/templates/default/config.xet
@@ -5,7 +5,7 @@
 	<template id="calendar.config" template="" lang="" group="0" version="16.1">
 		<grid width="100%" class="admin-config egwGridView_grid">
 			<columns>
-				<column width="60%"/>
+				<column width="50%"/>
 				<column/>
 			</columns>
 			<rows>
@@ -120,6 +120,16 @@
 					<description value="Limit search for conflicts in recurrences to given number of recurrences"/>
 					<float id="newsettings[conflict_max_checked]"/>
 				</row>
+				<row>
+					<description value="Email address migration" span="all" class="subHeader"/>
+				</row>
+				<row>
+					<description value="Change domain of participants in CalDAV requests"/>
+					<hbox>
+						<textbox id="newsettings[calendar_domain_replace]" blur="replace" size="48"/>
+						<textbox id="newsettings[calendar_domain_replace_with]" blur="with" size="48"/>
+					</hbox>
+				</row>
 			</rows>
 		</grid>
 	</template>