Import listens from file / Export listens to file

[regorxxx]

The current API allows to export/import listens from/to the server, using JSON. Also the web.

BUT the current web doesn't allow to import listens/feedback from a given JSON file.

• Exporting directly from foobar2000 would be great for backup purposes.
• Importing the JSON files should take into consideration duplication (essentially all but 'inserted_at' and 'listening_from' which may differ) . i.e. importing should first retrieve all user's listens, then compare both JSON's and finally send to the server only the ones not found.

Although I'm in the process of creating SMP scripts to integrate LB features within foobar (right now the playlist management is done), thought this one would be a natural addition to the plugin.

[phw]

Sounds useful. Export is trivial, and if there is an export an import makes sense as well. In theory LB itself would detect direct duplicates, would need to be checked. But if not that's easy enough to implement. Only thing to consider is that it should be clever doing the lookups, but one can filter by timestamps via the LB API, so it should be possible to verify multiple listens in a close enough timerange in a single call.