Re: [Tracker] Request for review, API allowing external software like MTP daemons to get metadata as correct sparql insert

[Philip Van Hoof <philip codeminded be>]

Is somebody planning to review this?

Martyn? JÃrg? Alexander? Carlos? :)

Kind regards,

Philip

On Mon, 2012-12-17 at 10:35 +0100, Philip Van Hoof wrote:
> Hi guys,
>
> I have finished my feature that allows MTP daemons to through an API get
> a correct SPARQL INSERT query with extracted metadata for a file.
>
> This is the branch: extract-sparql 
> http://git.gnome.org/browse/tracker/log/?h=extract-sparql
>
> This is the currently only commit:
> http://git.gnome.org/browse/tracker/commit/?h=extract-sparql&id=e4af9b34e22b60d37251426a29dfcd9b566f6e0e
>
>
> This is the newly added API:
>
>     static void
>     on_finished (GObject *none, GAsyncResult *result, gpointer user_data)
>     {
>         GMainLoop *loop = user_data;
>         GError *error = NULL;
>         gchar *sparql = tracker_extract_get_sparql_finish (result, &error);
>     
>         if (error == NULL) {
>                 g_print ("%s", sparql);
>                 g_free (sparql);
>         } else {
>                 g_error("%s", error->message);
>         }
>     
>         g_clear_error (&error);
>     
>         g_main_loop_quit (loop);
>     }
>     
>     int main (int argc, char **argv)
>     {
>         const gchar *file = "/tmp/file.png";
>         const gchar *dest = "file:///tmp/destination.png"
>         GMainLoop *loop;
>     
>         g_type_init();
>     
>         loop = g_main_loop_new (NULL, FALSE);
>         tracker_extract_get_sparql (file, dest, NULL, time(0),
>                                     time(0), on_finished, loop);
>     
>         g_main_loop_run (loop);
>     
>         g_object_unref (loop);
>     
>         return 0;
>   }
>
> I have also added usage of the API to the tracker-sparql binary:
>
> $ cp /home/pvanhoof/Documents/Photos/pasfoto-small.png /tmp/tempfile.png
> $ /opt/tracker/bin/tracker-sparql --metadata-file-path=/tmp/tempfile.png \
>       --metadata-graph-urn=urn:uuid:173b2520-4828-11e2-bcfd-0800200c9a66 \
>       --metadata-dest-url=file:///home/pvanhoof/Documents/Photos/photo.png
>
>
> INSERT SILENT {
> GRAPH <urn:uuid:173b2520-4828-11e2-bcfd-0800200c9a66> {
> _:file a nfo:FileDataObject , nie:InformationElement ;
>        nfo:fileName "photo.png" ;
>        nfo:fileSize 38155 ;
>        nfo:fileLastModified "2012-12-17T09:20:18Z" ;
>        nfo:fileLastAccessed "2012-12-17T09:20:18Z" ;
>        nie:isStoredAs _:file ;
>        nie:url "file:///home/pvanhoof/Documents/Photos/photo.png" ;
>        nie:mimeType "image/png" ;
>        a nfo:FileDataObject ;
>        nie:dataSource <urn:nepomuk:datasource:9291a450-1d49-11de-8c30-0800200c9a66> ;
>        tracker:available true .
> _:file a nfo:Image , nmm:Photo ;
>        nfo:width 150 ;
>        nfo:height 192 ;
>        nmm:dlnaProfile "PNG_LRG" ;
>        nmm:dlnaMime "image/png" .
>
> }
> }
>
> $ 
>
>
> Please review.
>
> Kind regards,
>
> Philip

-- 
Philip Van Hoof
Freelance software developer
Codeminded BVBA - http://codeminded.be