Querying Collections from dbus

[Nikolaj Hald Nielsen]

Definitely not a JJ in my opinion, more like a GSoC project if we want
it done right  (perhaps a generic "make the scripting + dbus API even
better" project?)

The only way I see to truly expose all of the collection framework to
scripts is to basically expose the collections and query makers
directly, which is all well and good (although it is giving scripters
a hell of a lot of rope to hang themselves with) using qtscript but
will obviously not work using DBus.

Then there is the option of actually layering SQL or something
SQL-like on top of the collection framework, and having a parser
transform that into calls to the collection/query makers (which then
in turn might make SQL of it once more, or do something completely
different). This would be very powerful, but getting it right is no
trivial task. Again possible GSoC material IMO. This would have the
added benefit of giving people and other apps a very familiar
interface to Amaroks collections. Potentially, this way, other apps
could even draw on the services for whatever nefarious purpose they
might want to do that for.

That was just the thoughts I had reading this mail in a pretty raw
form, hope its useful! :-)

- Nikolaj



On Wed, Feb 18, 2009 at 10:22 AM, Casey Link <unnamedrambler at gmail.com> wrote:
> There have been quite a few requests lately for some way to query
> collections  via dbus.  Mark and I discussed this a bit on IRC.
>
> In 1.4, there was only one collection and you used SQL to query it. In
> 2.x we have multiple collections and they don't all use SQL - hence
> the QueryMaker. Obviously to provide the most robust support to
> scripters, amarok should expose some way to interact with the
> querymakers for the active collections. How feasible is this? I
> suspect Nikolaj and Maxx will have some clue.
>
> Additionally, Mark stressed that a simple SQL pass-through dbus method
> for the local collection would be helpful for testing and make some
> people happy.
>
> Thoughts? Any volunteers? JJ?
>
> Casey
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