Add Spotify URI MimeType handler

[nodevel]

It would be nice if opening Spotify URI links through xdg-open would open CuteSpot with the given content.
URI example:

spotify:artist:44gRHbEm4Uqa0ykW0rDTNk

This could be achieved by adding a MimeType handler to the .desktop file like here:
https://github.com/nodevel/harbour-hopscotch/blob/master/harbour-hopscotch.desktop
and adding a way to open CuteSpot with command line arguments.
Copying URIs from the application would then be a nice way how to share music with other Spotify users.

PS: I'd look into it myself, but my SDK has been temporarily uninstalled to help me focus on different things :)

[DylanVanAssche]

Any progress on this? @lukedirtwalker I would love to integrate CuteSpotify with Sailfinder.
Since a couple of months you can add your favourite Spotify song and albums to your account. Other people can open them in the Spotify app. If the URI MimeType handler is added then this can added to Sailfinder :)

[lukedirtwalker]

Unfortunately I didn't have time to do this and I don't have high hopes that I'll have time in the near future :(

[DylanVanAssche]

No problem, I would make a PR but I don't have a spotify account and I am not very good with C++ code :p