[Bug 28482] ContactCapabilities: signal when contacts' capabilities become unknown

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=28482

Mikhail Zabaluev <mikhail.zabaluev at nokia.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |minor
           Priority|medium                      |low

--- Comment #1 from Mikhail Zabaluev <mikhail.zabaluev at nokia.com> 2010-06-14 09:37:07 PDT ---
(In reply to comment #0)
> <smcv> the backwards compat path would be to signal all possible caps for
> contacts whose real caps were unknown,

In practice, and actually per definition of capabilities, it's important to
signal caps that can be expected to work while nothing is known about contact's
present capabilities. E.g. XMPP could signal text channel classes because
offline messages normally work, but media channels need Jingle flavor data and
therefore should be omitted. In Skype, contacts can have statuses like "offline
but can leave voicemail", where a voice channel can be requested. There is also
an issue of presence status lag, so it may be practical to announce voice for
pure offline case too.

With this consideration, the additional signal becomes more a matter of
providing complete information, so I'm lowering the severity.

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