wip

mangezmieux-backend/internal/validator/error.go

@@ -0,0 +1,51 @@
+package validator
+
+import (
+	"errors"
+	"fmt"
+	"mangezmieux-backend/internal/logger"
+	"mangezmieux-backend/internal/responses"
+	"regexp"
+	"strings"
+
+	validatorLib "github.com/go-playground/validator/v10"
+)
+
+var regexpValidatorNamespacePrefix = regexp.MustCompile(`^\w+\.`)
+
+func NewDataValidationAPIError(err error) responses.APIError {
+	apiErr := responses.ErrDataValidation
+	if err != nil {
+		var invalidValidationErrror *validatorLib.InvalidValidationError
+		if errors.As(err, &invalidValidationErrror) {
+			logger.GetLogger().WithError(invalidValidationErrror).WithField("templateAPIErr", apiErr).Error("InvalidValidationError")
+		} else {
+			var validationErrors validatorLib.ValidationErrors
+			if errors.As(err, &validationErrors) {
+				for _, e := range validationErrors {
+					reason := e.Tag()
+					if _, ok := CustomValidators[e.Tag()]; ok {
+						reason = truncatingSprintf(CustomValidators[e.Tag()].Message, e.Param())
+					}
+
+					namespaceWithoutStructName := regexpValidatorNamespacePrefix.ReplaceAllString(e.Namespace(), "")
+					fe := responses.FieldError{
+						Field:       namespaceWithoutStructName,
+						Constraint:  e.Tag(),
+						Description: reason,
+					}
+					apiErr.Details = append(apiErr.Details, fe)
+				}
+			} else {
+				apiErr.Description = err.Error()
+			}
+		}
+	}
+	return apiErr
+}
+
+// truncatingSprintf is used as fmt.Sprintf but allow to truncate the additional parameters given when there is more parameters than %v in str.
+func truncatingSprintf(str string, args ...interface{}) string {
+	n := strings.Count(str, "%v")
+	return fmt.Sprintf(str, args[:n]...)
+}