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util.go
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util.go
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package qberrors
import (
"errors"
"strings"
)
// IsSafe returns true if err is safe to show the user.
func IsSafe(err error) bool { return errors.As(err, &ErrSafe{}) }
// SafeMessage returns an error message that is safe for the user to see.
func SafeMessage(err error) string {
if IsSafe(err) {
if serr, ok := err.(ErrSafe); ok {
return serr.Message
}
return SafeMessage(errors.Unwrap(err))
}
return defaultMsg
}
// SafeDetail returns detail about the error that is safe for the user to see.
func SafeDetail(err error) string {
if IsSafe(err) {
s := err.Error()
m := SafeMessage(err)
return strings.TrimRight(s[0:len(s)-len(m)], ": ")
}
return ""
}
// StatusCode returns the status code associated with the error.
func StatusCode(err error) int {
if serr, ok := err.(ErrSafe); ok {
if serr.StatusCode != 0 {
return serr.StatusCode
}
} else if err != nil {
return StatusCode(errors.Unwrap(err))
}
return defaultCode
}
// Upstream returns the error chain that caused the user to be shown an error.
// The error chain is assumed to be unsafe for the user to see.
func Upstream(err error) error {
if IsSafe(err) {
return upstream(err)
}
return err
}
func upstream(err error) error {
if ierr, ok := err.(Error); ok {
return ierr.Upstream()
} else if werr := errors.Unwrap(err); werr != nil {
return upstream(werr)
}
return nil
}
// NotFoundError returns an ErrClient with ErrClient.safe set as NotFound and
// additional context according to the format specifier.
func NotFoundError(format string, a ...interface{}) error {
return Client(nil).Safef(NotFound, format, a...)
}
// InvalidInputError returns an ErrClient with ErrClient.safe set as BadRequest
// and additional context according to the format specifier.
func InvalidInputError(err error, format string, a ...interface{}) error {
return Client(err).Safef(BadRequest, format, a...)
}