feat: initial commit

internal/http/handler/webui/common/error.go

@@ -0,0 +1,29 @@
+package common
+
+type Error struct {
+	err         string
+	userMessage string
+	statusCode  int
+}
+
+// StatusCode implements HTTPError.
+func (e *Error) StatusCode() int {
+	return e.statusCode
+}
+
+// Error implements UserFacingError.
+func (e *Error) Error() string {
+	return e.err
+}
+
+// UserMessage implements UserFacingError.
+func (e *Error) UserMessage() string {
+	return e.userMessage
+}
+
+func NewError(err string, userMessage string, statusCode int) *Error {
+	return &Error{err, userMessage, statusCode}
+}
+
+var _ UserFacingError = &Error{}
+var _ HTTPError = &Error{}