[Bug 26866] add support for requesting handles for a vCard field or URI

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=26866

--- Comment #33 from Eitan Isaacson <eitan.isaacson at collabora.co.uk> 2010-08-27 10:17:48 PDT ---
(In reply to comment #30)
>     <tp:contact-attribute name="representations" type="a{ss}"
>                           tp:type="Representations_Map">
>       <tp:docstring>
>         The various vCard and URI addresses that identify this contact.
>       </tp:docstring>
>     </tp:contact-attribute>
> 
> I think it's better to have another attribute for URI representations, rather
> than (in addition to?) distinguishing them by the special "url:" namespace
> (which may be a misnomer, as URLs are a subset of URIs). A client should not be
> forced to filter maps if it is only interested in URI representations. Also,
> with my pet case of using URNs, "url:urn" will look ugly and confusing.

Do you think using a url: prefix is a bad idea everywhere we expect a vcard
field? Or just that we should use uri: instead?

If the former, we will need:
 * To split the attribute above to vcard-representations and
uri-representations.
 * Addressing.GetContactsByURI
 * Add Protocol.AddressableURIField
 * Add Channel.TargetURIScheme and Channel.TargetURI

URLs could just be on their own and not be used as URL fields from vcards, so
this weird pattern could be avoided:
Addressing.GetContactsByVCardField("url", "sip:example.com")

And instead would be:
Addressing.GetContactsByURI("sip:eitan at example.com")
and
EnsureChannel(
  { ChannelType: Call,
    TargetURIScheme: "sip",
    TargetURI: "sip:eitan at example.com",
  });

Does all that look reasonable?

> 
>     <tp:contact-attribute name="requested" type="s">
>       <tp:docstring xmlns="http://www.w3.org/1999/xhtml">
>         <p>The contact's address, as it was requested
>         through <tp:member-ref>GetContactsByVCardField</tp:member-ref>.</p>
>       </tp:docstring>
>     </tp:contact-attribute>
> 
> Should the vCard field name be also represented?

Good catch, I'll fix that. It should be ss.

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