* Georg Lukas <[email protected]> [2021-09-07 17:22]:
Furthermore, I'm not sure if messages received by a client from
offline history are supposed to contain the respective MAM-ID, so
deduplicating here might be very adventurous, as the same message
might arrive from offline history without a MAM ID and from MAM with
a MAM ID, and the @id attribute might not be unique.
I'm not sure how implementations other than prosody handle this, but I'd
love to see MAM servers to also inject MAM-IDs into offline messages,
and have that explicitly written in 0313.
I would've assumed offline messages to be already covered by the
following guarantee, just like regular live messages:
When a message is archived, the server MUST add an <stanza-id/> element
as defined in Unique and Stable Stanza IDs (XEP-0359) to the message,
which informs the recipient of where and under what ID the message is
stored.
[ https://xmpp.org/extensions/xep-0313.html#archives_id ]
Holger
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