Update backend

internal/utils/format_validator_error.go

@@ -0,0 +1,38 @@
+package utils
+
+import (
+	"fmt"
+	"github.com/go-playground/validator/v10"
+	"reflect"
+)
+
+func formatValidationError(err error) string {
+	if _, ok := err.(*validator.InvalidValidationError); ok {
+		return err.Error()
+	}
+
+	var errorMessage string
+	for _, err := range err.(validator.ValidationErrors) {
+		switch err.Tag() {
+		case "required":
+			errorMessage += fmt.Sprintf("The field '%s' is required.", err.Field())
+		case "min":
+			if err.Kind() == reflect.Slice {
+				errorMessage += fmt.Sprintf("The field '%s' must contain at least %s items.", err.Field(), err.Param())
+			} else {
+				errorMessage += fmt.Sprintf("The field '%s' must be at least %s.", err.Field(), err.Param())
+			}
+		case "oneof":
+			errorMessage += fmt.Sprintf("The field '%s' must be one of [%s].", err.Field(), err.Param())
+		case "email":
+			errorMessage += fmt.Sprintf("The field '%s' must be a valid email address.", err.Field())
+		case "len":
+			errorMessage += fmt.Sprintf("The field '%s' must be exactly %s characters long.", err.Field(), err.Param())
+		default:
+			errorMessage += fmt.Sprintf("The field '%s' is invalid.", err.Field())
+		}
+		errorMessage += " "
+	}
+
+	return errorMessage
+}