Re: [Tracker] [Xesam] Proposing new methods in the API

["Mikkel Kamstrup Erlandsen" <mikkel kamstrup gmail com>]

2008/8/4 Jamie McCracken <jamie mccrack googlemail com>:
> On Thu, 2008-07-31 at 17:10 +0300, Ivan Frade wrote:
> > Hi all,
> >
> > A common use case for the client applications is to show some statistics
> > about the data they know. For instance, in Amarok you can see how many
> > different artists you have in your library, how many albums... Tracker
> > should provide some way to retrieve this data.
> >
> > I think we have two possible solutions: 1) to complicate (even more) the
> > GetUniqueValues method, 2) we can add two new methods in the API.
> >
> > So i would like to propose two new methods in the API:
> >
> > int sum (query, property)
> > int count (query, property)
> >
> > * Sum method:
> >  Run the query (if exists), and sum the value of the property in the
> > results. So to obtain the total playing time of Beethoven music:
> >
> > tracker.sum ("RDF query to obtain all albums of Beethoven",
> > "Audio:Length")
> >
> >  Or to obtain the total playing time in the computer:
> > tracker.sum (NULL, "Audio:Length")
> >
> > * Count method:
> >  Run the query (if exists) and count the different values in the
> > property for the results. So to obtain how many album do you have before
> > 1980:
> >
> > tracker.count ("RDF Query: all songs of before 1980", "Audio:Album")
> >
> >  Or to obtain how may albums do you have in your collection:
> > tracker.count (NULL, "Audio:Album")
> >
> > [note: this method could be called countUniqueValues, ugly but more
> > descriptive]
> >
> >  What do you think? Can we implement that? Do you have a better solution
> > for this?
> >
> > Thanks,
> >
> > Ivan
>
> We need to add these to xesam query I think

I actually thought a bit about on how to add this to Xesam in some
way, but did not come up with a clean way yet.

Anyway, definitely not for 1.0. But we can maybe discuss this at the hackfest?

Cheers,
Mikkel