Introduce a new configuration to select the login background image URL

conf/configuration.go

@@ -22,6 +22,8 @@ type nd struct {
 	SessionTimeout string `default:"30m"`
 	BaseURL        string `default:""`
 
+	UILoginBackgroundURL string `default:"https://source.unsplash.com/random/1600x900?music"`
+
 	IgnoredArticles string `default:"The El La Los Las Le Les Os As O A"`
 	IndexGroups     string `default:"A B C D E F G H I J K L M N O P Q R S T U V W X-Z(XYZ) [Unknown]([)"`
 

server/app/serve_index.go

@@ -32,6 +32,7 @@ func ServeIndex(ds model.DataStore, fs http.FileSystem) http.HandlerFunc {
 		appConfig := map[string]interface{}{
 			"firstTime":          firstTime,
 			"baseURL":            strings.TrimSuffix(conf.Server.BaseURL, "/"),
+			"loginBackgroundURL": conf.Server.UILoginBackgroundURL,
 		}
 		j, _ := json.Marshal(appConfig)
 		data := map[string]interface{}{

server/app/serve_index_test.go

@@ -22,6 +22,7 @@ var _ = Describe("ServeIndex", func() {
 
 	BeforeEach(func() {
 		ds = &persistence.MockDataStore{MockedUser: mockUser}
+		conf.Server.UILoginBackgroundURL = ""
 	})
 
 	It("adds app_config to index.html", func() {
@@ -67,6 +68,17 @@ var _ = Describe("ServeIndex", func() {
 		config := extractAppConfig(w.Body.String())
 		Expect(config).To(HaveKeyWithValue("baseURL", "base_url_test"))
 	})
+
+	It("sets the uiLoginBackgroundURL", func() {
+		conf.Server.UILoginBackgroundURL = "my_background_url"
+		r := httptest.NewRequest("GET", "/index.html", nil)
+		w := httptest.NewRecorder()
+
+		ServeIndex(ds, fs)(w, r)
+
+		config := extractAppConfig(w.Body.String())
+		Expect(config).To(HaveKeyWithValue("loginBackgroundURL", "my_background_url"))
+	})
 })
 
 var appConfigRegex = regexp.MustCompile(`(?m)window.__APP_CONFIG__="([^"]*)`)