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package authretry
import (
"context"
"errors"
"net/http"
"strings"
)
type Invalidator interface {
Invalidate()
}
type InvalidateFunc func()
func (f InvalidateFunc) Invalidate() { f() }
type StatusError interface {
error
HTTPStatus() int
}
func Do[T any](ctx context.Context, src Invalidator, call func(context.Context) (T, error), isAuthErr func(error) bool) (T, error) {
if isAuthErr == nil {
isAuthErr = IsAuthErr
}
value, err := call(ctx)
if err == nil || ctx.Err() != nil || !isAuthErr(err) {
return value, err
}
if src != nil {
src.Invalidate()
}
return call(ctx)
}
func Run(ctx context.Context, src Invalidator, call func(context.Context) error, isAuthErr func(error) bool) error {
_, err := Do(ctx, src, func(ctx context.Context) (struct{}, error) { return struct{}{}, call(ctx) }, isAuthErr)
return err
}
func Status(err error) int {
var se StatusError
if errors.As(err, &se) {
return se.HTTPStatus()
}
return 0
}
func IsAuthErr(err error) bool {
switch Status(err) {
case http.StatusUnauthorized:
return true
case http.StatusBadRequest, http.StatusForbidden:
return ExpiredToken(err.Error())
}
return false
}
func IsAuthOrForbidden(err error) bool {
switch Status(err) {
case http.StatusUnauthorized, http.StatusForbidden:
return true
}
return false
}
func IsAuthStatus(status int) bool {
return status == http.StatusUnauthorized || status == http.StatusForbidden
}
func ExpiredToken(message string) bool {
m := strings.ToLower(message)
for _, needle := range [...]string{"expiredtoken", "invalidtoken", "invalid_token", "token expired", "token has expired", "expired token", "invalid token", "token is expired"} {
if strings.Contains(m, needle) {
return true
}
}
return false
}
