[Bug 24939] Interface for upgrading chats/calls to multi-user

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=24939





--- Comment #8 from Naveen <ernaveenverma at gmail.com>  2009-11-14 07:06:31 PST ---
(In reply to comment #2)
> The XMPP mechanism referred to in the initial bug report is
> XEP-0045 §7.6, "Converting a One-to-One Chat Into a Multi-User
> Conference" <http://xmpp.org/extensions/xep-0045.html#continue>.
> This works as follows:
> 
> * Two users, Alice and Bob, are chatting via 1-1 messages (Telepathy
>   models this with a Channel, but in the underlying protocol, each message
>   stands alone).
> * Bob joins a new chatroom, automatically triggering its creation.
> * Bob sends chatroom invitations to Alice and Chris, each containing a
>   reference to the previous conversation with Alice. This reference can
>   either be the thread ID of that conversation, or just "<continue/>" as
>   an implicit indicator of "whatever conversation we were having".
> 
> I think it's fairly clear that the only reasonable representation for this
> from Alice's point of view is something like:
> 
> * there is a 1-1 Channel (call it C1), with TargetHandleType = CONTACT,
>   TargetHandle = Bob
> * a new Channel, C2, appears, with TargetHandleType = ROOM
> * C2 has some property that identifies it as a continuation of C1
> * if Alice ignores C2 and sends a message to C1, that message is sent
>   1-1 to Bob
> * C1 probably shouldn't close? (tbd)

-- Above description looks clear to me, accept not closing the channel while
underlaying protocol object which was mapped with the channel C1 has been moved
to C2.
What if we close the channel C1, and if UI still wants to continue p2p chat
then request a new channel C5 between Alice & Bod?


> 
> and from Bob's point of view:
> 
> * there is a 1-1 Channel C3 with TargetHandleType = CONTACT,
>   TargetHandle = Alice
> * Bob uses some yet-to-be-defined API to make a new Channel, C4, with
>   himself in it, and invite Alice and Chris to that Channel
> * C4 has TargetHandleType = ROOM, and the same property as C2 to
>   identify it as a continuation of C3
> * C3 might automatically close? (tbd)
> * if Alice ignores the room and sends a 1-1 message to Bob, that message
>   turns up in C3 (if it still exists) or in a new 1-1 channel C5 (otherwise)
> 
> Rob points out that for atomicity, the new channel (C2/C4) has to
> have a property saying "I am a continuation of (C1/C3)", as opposed to
> having the old channel (C1/C3) emit a signal "I've been replaced by (C2/C4)".
> 


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