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

[Jamie McCracken]

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

jamie