feat: Implement libre.fm Source/Client

[FoxxMD]

Please check existing knowledge before opening an issue

• I have checked the documentation
• I have searched through existing issues and discussions.

What Type?

Client

Name

Libre.fm

Website

https://github.com/libre-fm/developer/wiki/Libre.fm-fundamentals

API Available?

Yes

Free To Use?

Yes

Willing to finance development?

None

Will you help implement it?

• I am willing to contribute code towards completing this feature
• I am willing to help test preview builds for this feature

Additional Context

It may be possible to implement libre.fm as a Client/Source, now that there is enough documentation to do so without stumbling through the dark.

It's not possible to use the existing last.fm implementation, unfortunately. This is a limitation of the library and there don't seem to be any more up to date libraries that make these issues any easier to deal with. lastfm-ts-api seems to be a reproduction of lastfm-node-client, with the same issue:

The library has options for http functions hardcoded, including the hostname, so we can't easily switch out the base url for libre.fm

[FoxxMD]

Note for later me: libre.fm base URL must include a trailing slash or else it responds with a 301:

https://libre.fm/2.0?format=json... <--- 301 redirect
https://libre.fm/2.0/?format=json... <--- OK

In node_modules/lastfm-node-client/lib/ApiRequest.js, replacing send() options with

		const options = {
			hostname: "libre.fm",
			path: "/2.0/",
			port: 443,
			protocol: 'https:'
		};

And in MS LastfmApiClient.ts

getAuthUrl = () => `https://libre.fm/api/auth/?api_key=${this.config.apiKey}&cb=${encodeURIComponent(this.redirectUri)}`

[FoxxMD]

Getting auth session token seems OK. Using a random 32 character api key and secret. Errors occur for every other endpoint though.

user.getInfo returns Invalid parameters - Your request is missing a required parameter
user.getRecentTracks returns "{\"error\":{\"#text\":\"Invalid resource specified\",\"code\":\"7\"}}"