niki/pkg/http_msg/mapper.go

package httpmsg

import (
	"errors"
	"net/http"

	errmsg "git.gocasts.ir/ebhomengo/niki/pkg/err_msg"
	richerror "git.gocasts.ir/ebhomengo/niki/pkg/rich_error"
)

// TODO: this temperary to ignore linter error.(maggic number).
const (
	internalStatus = 500
)

func Error(err error) (message string, code int) {
	var re *richerror.RichError
	if !errors.As(err, &re) {
		return err.Error(), http.StatusBadRequest
	}
	msg := re.Message()
	code = mapKindToHTTPStatusCode(re.Kind())
	// we should not expose unexpected error messages
	if code >= internalStatus {
		msg = errmsg.ErrorMsgSomethingWentWrong
	}

	return msg, code
}

func mapKindToHTTPStatusCode(kind richerror.Kind) int {
	switch kind {
	case richerror.KindInvalid:

		return http.StatusUnprocessableEntity
	case richerror.KindNotFound:

		return http.StatusNotFound
	case richerror.KindForbidden:

		return http.StatusForbidden
	case richerror.KindUnexpected:

		return http.StatusInternalServerError
	default:

		return http.StatusBadRequest
	}
}