icalendar import while opening an article

[Uwe Brauer]

Hello

I started to use Ulf Jaspers icalendar, which allows to
import icalendar events to the diary file.

However in VM there is  hook, namely 
(add-hook 'vm-select-new-message-hook 'icalendar-extract-ical-from-buffer)

Which allows you to extract the icalendar just by opening
the message, in gnus it is more complicated, 

The icalendar event displayed as an attachment, therefore I
have to toggle the display so see the content and then run
the function icalendar-extract-ical-from-buffer.

Does anybody know about a solution comparable to the one of VM?


Uwe Brauer