fix: filter oauth whitelist to remove empty strings

cmd/root.go

@@ -62,7 +62,9 @@ var rootCmd = &cobra.Command{
 		}
 
 		// Create oauth whitelist
-		oauthWhitelist := strings.Split(config.OAuthWhitelist, ",")
+		oauthWhitelist := utils.Filter(strings.Split(config.OAuthWhitelist, ","), func(val string) bool {
+			return val != ""
+		})
 		log.Debug().Msg("Parsed OAuth whitelist")
 
 		// Create OAuth config

internal/utils/utils.go

@@ -207,3 +207,13 @@ func GetTinyauthLabels(labels map[string]string) types.TinyauthLabels {
 func OAuthConfigured(config types.Config) bool {
 	return (config.GithubClientId != "" && config.GithubClientSecret != "") || (config.GoogleClientId != "" && config.GoogleClientSecret != "") || (config.GenericClientId != "" && config.GenericClientSecret != "") || (config.TailscaleClientId != "" && config.TailscaleClientSecret != "")
 }
+
+// Filter helper function
+func Filter[T any](slice []T, test func(T) bool) (res []T) {
+	for _, value := range slice {
+		if test(value) {
+			res = append(res, value)
+		}
+	}
+	return res
+}

internal/utils/utils_test.go

@@ -313,3 +313,22 @@ func TestGetTinyauthLabels(t *testing.T) {
 		t.Fatalf("Expected %v, got %v", expected, result)
 	}
 }
+
+// Test the filter function
+func TestFilter(t *testing.T) {
+	t.Log("Testing filter helper")
+
+	// Create variables
+	data := []string{"", "val1", "", "val2", "", "val3", ""}
+	expected := []string{"val1", "val2", "val3"}
+
+	// Test the filter function
+	result := utils.Filter(data, func(val string) bool {
+		return val != ""
+	})
+
+	// Check if the result is equal to the expected
+	if !reflect.DeepEqual(expected, result) {
+		t.Fatalf("Expected %v, got %v", expected, result)
+	}
+}