Add config option to set default theme

server/app/serve_index.go

@@ -40,11 +40,12 @@ func serveIndex(ds model.DataStore, fs fs.FS) http.HandlerFunc {
 			"loginBackgroundURL":      policy.Sanitize(conf.Server.UILoginBackgroundURL),
 			"welcomeMessage":          policy.Sanitize(conf.Server.UIWelcomeMessage),
 			"enableTranscodingConfig": conf.Server.EnableTranscodingConfig,
-			"gaTrackingId":            conf.Server.GATrackingID,
 			"enableDownloads":         conf.Server.EnableDownloads,
 			"enableFavourites":        conf.Server.EnableFavourites,
-			"losslessFormats":         strings.ToUpper(strings.Join(consts.LosslessFormats, ",")),
 			"enableStarRating":        conf.Server.EnableStarRating,
+			"defaultTheme":            conf.Server.DefaultTheme,
+			"gaTrackingId":            conf.Server.GATrackingID,
+			"losslessFormats":         strings.ToUpper(strings.Join(consts.LosslessFormats, ",")),
 			"devActivityPanel":        conf.Server.DevActivityPanel,
 			"devFastAccessCoverArt":   conf.Server.DevFastAccessCoverArt,
 		}

server/app/serve_index_test.go

@@ -147,6 +147,17 @@ var _ = Describe("serveIndex", func() {
 		Expect(config).To(HaveKeyWithValue("enableStarRating", true))
 	})
 
+	It("sets the defaultTheme", func() {
+		conf.Server.DefaultTheme = "Light"
+		r := httptest.NewRequest("GET", "/index.html", nil)
+		w := httptest.NewRecorder()
+
+		serveIndex(ds, fs)(w, r)
+
+		config := extractAppConfig(w.Body.String())
+		Expect(config).To(HaveKeyWithValue("defaultTheme", "Light"))
+	})
+
 	It("sets the gaTrackingId", func() {
 		conf.Server.GATrackingID = "UA-12345"
 		r := httptest.NewRequest("GET", "/index.html", nil)