From 8e0cca45cb01b608eb3ba3c5cd841764ab699594 Mon Sep 17 00:00:00 2001
From: Zdenek Devaty <zdenek.devaty@eliona.io>
Date: Fri, 17 May 2024 08:12:11 +0200
Subject: [PATCH] Warn about recurring events

Recurring events will be complex to get right, so we will not support
them at all in initial version.
---
 USER-GUIDE.md |  4 ++++
 ews/ews.go    | 12 ++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/USER-GUIDE.md b/USER-GUIDE.md
index 6d0ee41..785a276 100644
--- a/USER-GUIDE.md
+++ b/USER-GUIDE.md
@@ -150,3 +150,7 @@ If the booking is made by a user without Exchange account (or an Ad-hoc booking)
 ## Booking Timing
 
 When creating or deleting a booking from Eliona, the booking will be visible in Outlook in a few seconds. Changes made in Outlook are synchronized to Eliona every `refreshInterval` seconds.
+
+## Recurring events
+
+For technical reasons, recurring events are not yet supported.
diff --git a/ews/ews.go b/ews/ews.go
index 66bc6f0..db67e63 100644
--- a/ews/ews.go
+++ b/ews/ews.go
@@ -258,6 +258,7 @@ type calendarItem struct {
 	Start            time.Time `xml:"Start"`
 	End              time.Time `xml:"End"`
 	Organizer        organizer `xml:"Organizer"`
+	CalendarItemType string    `xml:"CalendarItemType"`
 }
 
 type itemId struct {
@@ -300,6 +301,7 @@ func (h *EWSHelper) GetRoomAppointments(roomEmail string, syncState string) (new
                     <t:FieldURI FieldURI="calendar:Start"/>
                     <t:FieldURI FieldURI="calendar:End"/>
                     <t:FieldURI FieldURI="calendar:Organizer"/>
+                    <t:FieldURI FieldURI="calendar:CalendarItemType"/>
                 </t:AdditionalProperties>
             </m:ItemShape>
             <m:SyncFolderId>
@@ -342,6 +344,11 @@ func (h *EWSHelper) GetRoomAppointments(roomEmail string, syncState string) (new
 			return nil, nil, nil, syncState, fmt.Errorf("resolving distinguished name '%s': %v", item.Organizer.Mailbox.EmailAddress, err)
 		}
 
+		if change.CalendarItem.CalendarItemType == "RecurringMaster" {
+			log.Warn("EWS", "A recurring event was created for %s by %s. Recurring events are not supported!", roomEmail, organizerEmail)
+			continue
+		}
+
 		new = append(new, model.Booking{
 			ExchangeIDInResourceMailbox: item.ItemId.Id,
 			ExchangeUID:                 item.UID,
@@ -363,6 +370,11 @@ func (h *EWSHelper) GetRoomAppointments(roomEmail string, syncState string) (new
 			return nil, nil, nil, syncState, fmt.Errorf("resolving distinguished name '%s': %v", item.Organizer.Mailbox.EmailAddress, err)
 		}
 
+		if change.CalendarItem.CalendarItemType == "RecurringMaster" {
+			log.Warn("EWS", "A recurring event was updated for %s by %s. Recurring events are not supported!", roomEmail, organizerEmail)
+			continue
+		}
+
 		updated = append(updated, model.Booking{
 			ExchangeIDInResourceMailbox: item.ItemId.Id,
 			ExchangeUID:                 item.UID,