micro-server-grpc/errors/errors.go

package errors

import (
	"fmt"
)

func (e *Error) Error() string {
	return fmt.Sprintf(`{"id":"%s","code":%d,"detail":"%s","status":"%s"}`, e.Id, e.Code, e.Detail, e.Status)
}

// New generates a custom error.
func New(id, detail string, code int32) error {
	return &Error{
		Id:     id,
		Code:   code,
		Detail: detail,
		//	Status: http.StatusText(int(code)),
	}
}

// BadRequest generates a 400 error.
func BadRequest(id, format string, a ...interface{}) error {
	return &Error{
		Id:     id,
		Code:   400,
		Detail: fmt.Sprintf(format, a...),
		//		Status: http.StatusText(400),
	}
}

// Unauthorized generates a 401 error.
func Unauthorized(id, format string, a ...interface{}) error {
	return &Error{
		Id:     id,
		Code:   401,
		Detail: fmt.Sprintf(format, a...),
		//		Status: http.StatusText(401),
	}
}

// Forbidden generates a 403 error.
func Forbidden(id, format string, a ...interface{}) error {
	return &Error{
		Id:     id,
		Code:   403,
		Detail: fmt.Sprintf(format, a...),
		//		Status: http.StatusText(403),
	}
}

// NotFound generates a 404 error.
func NotFound(id, format string, a ...interface{}) error {
	return &Error{
		Id:     id,
		Code:   404,
		Detail: fmt.Sprintf(format, a...),
		//	Status: http.StatusText(404),
	}
}

// MethodNotAllowed generates a 405 error.
func MethodNotAllowed(id, format string, a ...interface{}) error {
	return &Error{
		Id:     id,
		Code:   405,
		Detail: fmt.Sprintf(format, a...),
		//Status: http.StatusText(405),
	}
}

// Timeout generates a 408 error.
func Timeout(id, format string, a ...interface{}) error {
	return &Error{
		Id:     id,
		Code:   408,
		Detail: fmt.Sprintf(format, a...),
		//Status: http.StatusText(408),
	}
}

// Conflict generates a 409 error.
func Conflict(id, format string, a ...interface{}) error {
	return &Error{
		Id:     id,
		Code:   409,
		Detail: fmt.Sprintf(format, a...),
		//Status: http.StatusText(409),
	}
}

// InternalServerError generates a 500 error.
func InternalServerError(id, format string, a ...interface{}) error {
	return &Error{
		Id:     id,
		Code:   500,
		Detail: fmt.Sprintf(format, a...),
		//Status: http.StatusText(500),
	}
}

// NotImplemented generates a 501 error
func NotImplemented(id, format string, a ...interface{}) error {
	return &Error{
		Id:     id,
		Code:   501,
		Detail: fmt.Sprintf(format, a...),
		//Status: http.StatusText(501),
	}
}

// BadGateway generates a 502 error
func BadGateway(id, format string, a ...interface{}) error {
	return &Error{
		Id:     id,
		Code:   502,
		Detail: fmt.Sprintf(format, a...),
		//	Status: http.StatusText(502),
	}
}

// ServiceUnavailable generates a 503 error
func ServiceUnavailable(id, format string, a ...interface{}) error {
	return &Error{
		Id:     id,
		Code:   503,
		Detail: fmt.Sprintf(format, a...),
		//Status: http.StatusText(503),
	}
}

// GatewayTimeout generates a 504 error
func GatewayTimeout(id, format string, a ...interface{}) error {
	return &Error{
		Id:     id,
		Code:   504,
		Detail: fmt.Sprintf(format, a...),
		//Status: http.StatusText(504),
	}
}

// Equal tries to compare errors
func Equal(err1 error, err2 error) bool {
	verr1, ok1 := err1.(*Error)
	verr2, ok2 := err2.(*Error)

	if ok1 != ok2 {
		return false
	}

	if !ok1 {
		return err1 == err2
	}

	if verr1.Code != verr2.Code {
		return false
	}

	return true
}