fix

pkg/adminauth/token.go

@@ -7,6 +7,14 @@ import (
 	"github.com/golang-jwt/jwt/v5"
 )
 
+var (
+	ErrTokenExpired          = errors.New("token expired")
+	ErrTokenMalformed        = errors.New("token malformed")
+	ErrTokenSignatureInvalid = errors.New("token signature invalid")
+	ErrTokenNotValidYet      = errors.New("token not valid yet")
+	ErrTokenInvalid          = errors.New("token invalid")
+)
+
 type Claims struct {
 	UUID          string
 	ID            uint
@@ -35,8 +43,22 @@ func Parse(tokenString, secret string) (*Claims, error) {
 		}
 		return []byte(secret), nil
 	})
-	if err != nil || !token.Valid {
-		return nil, errors.New("token is invalid")
+	if err != nil {
+		switch {
+		case errors.Is(err, jwt.ErrTokenExpired):
+			return nil, ErrTokenExpired
+		case errors.Is(err, jwt.ErrTokenMalformed):
+			return nil, ErrTokenMalformed
+		case errors.Is(err, jwt.ErrTokenSignatureInvalid):
+			return nil, ErrTokenSignatureInvalid
+		case errors.Is(err, jwt.ErrTokenNotValidYet):
+			return nil, ErrTokenNotValidYet
+		default:
+			return nil, ErrTokenInvalid
+		}
+	}
+	if !token.Valid {
+		return nil, ErrTokenInvalid
 	}
 	claims, ok := token.Claims.(*Claims)
 	if !ok {