Scrobble to Libre.fm & keep Last.fm stats clean by scrobbling only the first returned (album) artist.

[0nse]

Update: Support Libre.fm. If a session key does not exist yet, the user is prompted to do create one using their Web browser.

Please note that changes to the configuration schema had to be made. These are explained in the README.

Everything below is about scrobbling the primary artist (which was the original pull request).

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Current problem: If one plays a track by multiple artists, these are scrobbled by concatenating them using a semicolon. For one, ID3v2.3 recommends using slashes. Moreover, this creates a lot of new pages on Last.fm for artists that collaborate with others, when using Spotify. Additional information about this problem can be found in mopidy/mopidy#1389.

This pull request:

• Use slashes instead of semicolon (currently only used in logging)
• If existing, scrobble the album artist(s) instead of concatenating track artist names, except if the album artist name is "Compilation", "Split" or "Various Artists" (case insensitive)
• The first returned artist is being scrobbled as it is considered the primary artist
• I have tested it for a month now and it works as intended

Effects:

• Scrobbles from Spotify no longer mess up Last.fm stats, e.g. Tony Malaby's Apparitions/Tom Rainey/Drew Gress/John Hollenbeck - East Bay will be scrobbled correctly as Tony Malaby's Apparitions - East Bay.

Drawbacks:

• If mopidy provides multiple artists for a sane reason, they will no longer be scrobbled in a concatenated manner but only the first returned (album) artist will be. Imho, this is prone to ruin Last.fm stats anyways and therefore scrobbling the primary artist should be preferred in any case.

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In the end, this pull request remains a workaround for mopidy/mopidy#1389. Personally, I prefer this solution but you might want to consider creating a dedicated branch instead of merging it onto master.

[marsjaninzmarsa]

Why not follow native Spotify scrobbler behavior, converting additional artists to feats in name?

[0nse]

I hadn't been aware of the behaviour you are describing. In fact, when I implemented this, I remember the official Spotify app fucking up scrobbles similarly.

Nowadays I'm hardly ever using the mopidy-scrobbler anymore. You are welcome to improve on this PR though.