[Tickets #14409] Re: Invitation email text changes after invitation is accepted

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Ticket URL: https://bugs.horde.org/ticket/14409
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  Ticket             | 14409
  Updated By         | Michael Rubinsky <mrubinsk at horde.org>
  Summary            | Invitation email text changes after invitation is
                     | accepted
  Queue              | IMP
  Version            | 6.2.14
  Type               | Bug
-State              | Unconfirmed
+State              | Not A Bug
  Priority           | 1. Low
  Milestone          |
  Patch              |
-Owners             |
+Owners             | Michael Rubinsky
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Michael Rubinsky <mrubinsk at horde.org> (2016-06-28 04:10) wrote:

This might be surprising, but it's expected.

The iTip/iCal specs state that when a given event UID is already  
present in the attendee's calendar and an iTip is received, it  
represents a change to the event.

Since a change may or may not mean a rescheduling or some other change  
that requires the SEQUENCE number to be incremented, the ONLY way to  
know if the event is already in the attendee's calendar is to search  
for the UID.

Since the attendee already accepted and added it to his/her calendar,  
when the iTip is displayed it detects the event and thinks it's an  
update. Some other groupware clients actually will automatically  
delete the iTip email when it is responded to (presumably) to avoid  
this confusion.

We still need to implement full support for SEQUENCE and COUNTER  
etc... (see Ticket: 8396), but this behavior is not a bug.