config: add branding settings (#3558)

internal/httputil/branding.go

@@ -0,0 +1,35 @@
+package httputil
+
+// The BrandingOptions customize the user info and error pages.
+type BrandingOptions interface {
+	GetPrimaryColor() string
+	GetSecondaryColor() string
+	GetDarkmodePrimaryColor() string
+	GetDarkmodeSecondaryColor() string
+	GetLogoUrl() string
+	GetFaviconUrl() string
+	GetErrorMessageFirstParagraph() string
+}
+
+// AddBrandingOptionsToMap adds the branding options to the map.
+func AddBrandingOptionsToMap(dst map[string]any, brandingOptions BrandingOptions) {
+	if brandingOptions == nil {
+		return
+	}
+
+	if brandingOptions.GetPrimaryColor() != "" {
+		dst["primaryColor"] = brandingOptions.GetPrimaryColor()
+	}
+	if brandingOptions.GetSecondaryColor() != "" {
+		dst["secondaryColor"] = brandingOptions.GetSecondaryColor()
+	}
+	if brandingOptions.GetLogoUrl() != "" {
+		dst["logoUrl"] = brandingOptions.GetLogoUrl()
+	}
+	if brandingOptions.GetFaviconUrl() != "" {
+		dst["faviconUrl"] = brandingOptions.GetFaviconUrl()
+	}
+	if brandingOptions.GetErrorMessageFirstParagraph() != "" {
+		dst["errorMessageFirstParagraph"] = brandingOptions.GetErrorMessageFirstParagraph()
+	}
+}

internal/httputil/errors.go

@@ -20,6 +20,8 @@ type HTTPError struct {
 	DebugURL *url.URL
 	// The request ID.
 	RequestID string
+
+	BrandingOptions BrandingOptions
 }
 
 // NewError returns an error that contains a HTTP status and error.
@@ -73,7 +75,7 @@ func (e *HTTPError) ErrorResponse(ctx context.Context, w http.ResponseWriter, r
 		return
 	}
 
-	m := map[string]interface{}{
+	m := map[string]any{
 		"canDebug":               response.CanDebug,
 		"error":                  response.Error,
 		"requestId":              response.RequestID,
@@ -84,6 +86,7 @@ func (e *HTTPError) ErrorResponse(ctx context.Context, w http.ResponseWriter, r
 	if response.DebugURL != nil {
 		m["debugUrl"] = response.DebugURL.String()
 	}
+	AddBrandingOptionsToMap(m, e.BrandingOptions)
 
 	w.Header().Set("Content-Type", "text/html; charset=UTF-8")
 	w.WriteHeader(response.Status)