initial commit

internal/utils/verify.go

@@ -0,0 +1,45 @@
+package utils
+
+import (
+	"errors"
+	"strconv"
+
+	"github.com/golang-jwt/jwt/v5"
+)
+
+func VerifyToken(tokenStr, secret, tokenType string) (uint, error) {
+	token, err := jwt.Parse(tokenStr, func(_ *jwt.Token) (interface{}, error) {
+		return []byte(secret), nil
+	})
+	if err != nil || !token.Valid {
+		return 0, err
+	}
+
+	claims, ok := token.Claims.(jwt.MapClaims)
+	if !ok {
+		return 0, errors.New("invalid token claims")
+	}
+
+	jwtType, ok := claims["type"].(string)
+	if !ok || jwtType != tokenType {
+		return 0, errors.New("invalid token type")
+	}
+
+	sub, ok := claims["sub"]
+	if !ok {
+		return 0, errors.New("invalid token sub")
+	}
+
+	switch v := sub.(type) {
+	case float64:
+		return uint(v), nil
+	case string:
+		id, err := strconv.Atoi(v)
+		if err != nil {
+			return 0, errors.New("invalid sub format")
+		}
+		return uint(id), nil
+	default:
+		return 0, errors.New("unsupported sub type")
+	}
+}