[Bug 27374] New: GetContactAttributes() is specified to be needlessly fascist about interfaces

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=27374

           Summary: GetContactAttributes() is specified to be needlessly
                    fascist about interfaces
           Product: Telepathy
           Version: git master
          Platform: Other
        OS/Version: All
            Status: NEW
          Keywords: patch
          Severity: normal
          Priority: medium
         Component: butterfly
        AssignedTo: telepathy-bugs at lists.freedesktop.org
        ReportedBy: will.thompson at collabora.co.uk
        Depends on: 27325


+++ This bug was initially created as a clone of Bug #27325 +++

>From the definition of GetContactAttributes():

> It is an error to request interfaces that are not supported by this
> Connection (i.e. mentioned in the ContactAttributeInterfaces
> property).
>
> | This makes it possible to distinguish between interfaces for which
> | the Connection has nothing to say (e.g. we don't know the avatar
> | tokens of any of the contacts, so we omitted them all), and interfaces
> | for which this API isn't supported.

This is needlessly pedantic. If we had instead said that the CM must
ignore interfaces which aren't supported on the Contacts interface, then
client code that does care could still check ContactAttributeInterfaces
to distinguish those two cases, and client code that doesn't care
wouldn't have to mess around checking the list of interfaces it passes
to GetContactAttributes().


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