dav is never sending "update" imip emails when event is changed

[brad2014]

When a calendar event is updated (e.g. its start time is changed), an update imip mail should be sent to attendees.

To reproduce:

• create an event
• add an attendee
• notice invite email is received by attendee
• change start time of event

Actual behavior:

• attendee receives another "invite" email

Expected behavior:

• attendee should receive an "update" email.

[brad2014]

Notes: According to RFC 5546,

The combination of the "UID" property (unchanged) and the "SEQUENCE" 
(bumped to 1) properties indicate the update.

But it looks like the code is incorrectly expecting METHOD to be REPLY instead of checking UID and SEQUENCE (I don't think the server should ever be sending an imip REPLY, only REQUEST and CANCEL. The client sends REPLY).

[nextcloud-bot]

GitMate.io thinks possibly related issues are #2249 (Updating dav fails), #1427 (Update sabre/dav), #7310 (Sending pgp encrypted Emails), #8385 (Cant set or change email), and #5658 (share by email - password email not sent - solved).

[georgehrke]

@brad2014 Can you point us to the code you are talking about please?

In case of doubt this has to be fixed upstream at sabre/dav

[szaimen]

I'm closing this issue due to inactivity. If this is still happening please make sure to upgrade to the latest version. After that, feel free to reopen.