Listenbrainz scrobbling (#1424)

* Refactor session_keys to its own package

* Adjust play_tracker

- Don't send external NowPlaying/Scrobble for tracks with unknown artist
- Continue to the next agent on error

* Implement ListenBrainz Agent and Auth Router

* Implement frontend for ListenBrainz linking

* Update listenBrainzRequest

- Don't marshal Player to json
- Rename Track to Title

* Return ErrRetryLater on ListenBrainz server errors

* Add tests for listenBrainzAgent

* Add tests for ListenBrainz Client

* Adjust ListenBrainzTokenDialog to handle errors better

* Refactor listenbrainz.formatListen and listenBrainzRequest structs

* Refactor agent auth_routers

* Refactor session_keys to agents package

* Add test for listenBrainzResponse

* Add tests for ListenBrainz auth_router

* Update ListenBrainzTokenDialog and auth_router

* Adjust player scrobble toggle

server/serve_index.go

@@ -49,6 +49,7 @@ func serveIndex(ds model.DataStore, fs fs.FS) http.HandlerFunc {
 			"lastFMEnabled":           conf.Server.LastFM.Enabled,
 			"lastFMApiKey":            conf.Server.LastFM.ApiKey,
 			"devShowArtistPage":       conf.Server.DevShowArtistPage,
+			"devListenBrainzEnabled":  conf.Server.DevListenBrainzEnabled,
 		}
 		auth := handleLoginFromHeaders(ds, r)
 		if auth != nil {

server/serve_index_test.go

@@ -254,6 +254,7 @@ var _ = Describe("serveIndex", func() {
 		config := extractAppConfig(w.Body.String())
 		Expect(config).To(HaveKeyWithValue("lastFMApiKey", "APIKEY-123"))
 	})
+
 	It("sets the devShowArtistPage", func() {
 		conf.Server.DevShowArtistPage = true
 		r := httptest.NewRequest("GET", "/index.html", nil)
@@ -265,6 +266,16 @@ var _ = Describe("serveIndex", func() {
 		Expect(config).To(HaveKeyWithValue("devShowArtistPage", true))
 	})
 
+	It("sets the devListenBrainzEnabled", func() {
+		conf.Server.DevListenBrainzEnabled = true
+		r := httptest.NewRequest("GET", "/index.html", nil)
+		w := httptest.NewRecorder()
+
+		serveIndex(ds, fs)(w, r)
+
+		config := extractAppConfig(w.Body.String())
+		Expect(config).To(HaveKeyWithValue("devListenBrainzEnabled", true))
+	})
 })
 
 var appConfigRegex = regexp.MustCompile(`(?m)window.__APP_CONFIG__="([^"]*)`)