[Standards] Messages to unsubscribed contacts and resources

[Robin Redeker]

Hi Joe,

thanks for the reply!

On Fri, Dec 14, 2007 at 07:09:26AM -0800, Joe Hildebrand wrote:
> 
> On Dec 12, 2007, at 7:04 AM, Robin Redeker wrote:
> >Ok, I have another question:
> >
> >We have: Contact A with one resource (resource is 'res1'):
> >
> > contact_a at jabber.org/res1
> >
> >And Contact B with two resources:
> >
> > contact_a at jabber.org/res1  priority 20
> 
> Assume you mean contact_b.

Yes, indeed :)

> 
> > contact_b at jabber.org/res2  priority 10
> >
> >They are not subscribed to each other and do NOT share any presence
> >information.
> 
> Even directed presence?  The cool side effect of sending a directed  
> presence is that everyone to whom you have sent directed presence will  
> get an unavail when you go offline.

Yes, even directed presence not. I know that directed presence makes
things easier in this case, but I assume here that there are still
clients and people that don't do or don't want to send the presence.

[.snip.]
> >Should he make a second 'chat session', which is probably not very
> >intuitive for the user because he just wanted to talk to contact B and
> >when he got two options to send the message, what should he do (he
> >doesn't even know which resource is the 'right' one, or whether 'res1'
> >maybe went offline)?
> 
> You're correct that there shouldn't be a new visible session.  There  
> were clients that did that back in the day (or with each new thread!)  
> and it turned out to be pretty confusing.  You should just rebind to  
> the new resource.

Ok, that also makes things easier in the code.

> >What if they share presence, should contact A's client determine from
> >the highest priority resource where the message should go to?
> 
> Absolutely not.  You should just unbind at least when res1 goes  
> offline, and perhaps whenever you get a presence change from  
> contact_b.  Keep in mind that b's server might be doing much more  
> sophisticated "most available" calculations.

But what if contact B first replied from the resource 1 and also sent a
directed presence to contact A, _and_ then changes to resource 2 to talk
to contact A, should contact A rebind (I would guess that would make
sense)?

> Alternate question:  What if contact_b's server is using RAP  
> (XEP-168)?  Then contact_a can know what the new most available  
> resource is?  My answer to that is that if the resource contact_a is  
> bound to was the primary resource, and now isn't, you should unbind,  
> otherwise not.

Well, what in the case I explained in my last paragraph (about contact
B, who changes the resource without changing presence settings)?
Should contact A still send to the primary resource or still rebind to
the last resource he got a message from?

Sorry for my complicated and very technical questions, I just want to
get it right :)

Thanks for your time!
   Robin

-- 
Robin Redeker                         | Deliantra, the free code+content MORPG
elmex at ta-sa.org / r.redeker at gmail.com | http://www.deliantra.net
http://www.ta-sa.org/                 |