On Tue Feb 14 04:09:45 2012, Peter Saint-Andre wrote:
On 1/24/12 2:58 PM, Dave Cridland wrote:
> I recall - ages ago - that we were going to, at one point,
mention that
> if you change your nickname, you should send unavailable persence
after
> the change to the old nick:
>
> C: <presence to='room@service/new_nick'/>
> S: <presence from='room@service/old_nick'
> type='unavailable'>...110/303...</presence>
> S: <presence from='room@service/new_nick'/>
> C: <presence to='room@service/old_nick' type='unavailable'/>
>
> The problem being that currently, the server must track directed
> presence, and so if you change your nickname, the server keeps
tracking
> the old nickname too - and will eventually have to send an
unavailable
> anyway.
Well, the server could do that immediately (when it accepts the nick
change), no?
No, your server has no real idea it *is* a nick change, without
tracking a lot more.
1) user@A joins room@B as nickname N1
<presence from='user@A/resource' to='room@B/N1'/>
- A now tracks directed presence to room@B/N1
2) user@A changes nickname to N2
<presence from='user@A/resource' to='room@B/N2'/>
- A now additionally tracks directed presence to room@B/N2
3) user@A leaves chatroom.
<presence from='user@A/resource' to='room@B/N2'
type='unavailable'/>
- A now stops tracking room@B/N2
4) user@A drops offline.
<presence from ='user@A/resource' type='unavailable'/>
- A now sends unavailable presence to room@B/N1
Dave.
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