depot/web/fup/fuphttp/errors.go

// SPDX-FileCopyrightText: 2021 Luke Granger-Brown <depot@lukegb.com>
//
// SPDX-License-Identifier: Apache-2.0

package fuphttp

import (
	"errors"
	"fmt"

	"gocloud.dev/gcerrors"
)

type fupError struct {
	Code gcerrors.ErrorCode
	msg  string
	err  error
}

func (e *fupError) Error() string {
	var msg string
	if e.msg == "" {
		msg = fmt.Sprintf("code=%v", e.Code)
	} else {
		msg = fmt.Sprintf("%s (code=%v)", e.msg, e.Code)
	}
	if e.err != nil {
		msg = fmt.Sprintf("%s: %s", msg, e.err)
	}
	return msg
}

func (e *fupError) Unwrap() error {
	return e.err
}

func errorCode(err error) gcerrors.ErrorCode {
	if err == nil {
		return gcerrors.OK
	}
	var e *fupError
	if errors.As(err, &e) {
		return e.Code
	}
	return gcerrors.Code(err)
}