Make default home page configurable

validator/user.go

@@ -91,6 +91,12 @@ func ValidateUserModification(store *storage.Storage, userID int64, changes *mod
 		}
 	}
 
+	if changes.DefaultHomePage != nil {
+		if err := validateDefaultHomePage(*changes.DefaultHomePage); err != nil {
+			return err
+		}
+	}
+
 	return nil
 }
 
@@ -156,3 +162,11 @@ func validateDisplayMode(displayMode string) *ValidationError {
 	}
 	return nil
 }
+
+func validateDefaultHomePage(defaultHomePage string) *ValidationError {
+	defaultHomePages := model.HomePages()
+	if _, found := defaultHomePages[defaultHomePage]; !found {
+		return NewValidationError("error.invalid_default_home_page")
+	}
+	return nil
+}