chore: init repository

internal/storage/validators/error.go

@@ -0,0 +1,43 @@
+package validators
+
+import (
+	"fmt"
+	"gopkg.in/go-playground/validator.v9"
+	"john/internal/storage/model"
+	"john/internal/utils"
+	"regexp"
+	"strings"
+)
+
+var regexpValidatorNamespacePrefix = regexp.MustCompile(`^\w+\.`)
+
+func NewDataValidationAPIError(err error) model.APIError {
+	apiErr := model.ErrDataValidation
+	if err != nil {
+		if _, ok := err.(*validator.InvalidValidationError); ok {
+			utils.GetLogger().WithError(err).WithField("templateAPIErr", apiErr).Error("InvalidValidationError")
+		} else {
+			for _, e := range err.(validator.ValidationErrors) {
+				reason := e.Tag()
+				if _, ok := CustomValidators[e.Tag()]; ok {
+					reason = truncatingSprintf(CustomValidators[e.Tag()].Message, e.Param())
+				}
+
+				namespaceWithoutStructName := regexpValidatorNamespacePrefix.ReplaceAllString(e.Namespace(), "")
+				fe := model.FieldError{
+					Field:       namespaceWithoutStructName,
+					Constraint:  e.Tag(),
+					Description: reason,
+				}
+				apiErr.Details = append(apiErr.Details, fe)
+			}
+		}
+	}
+	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]...)
+}

internal/storage/validators/validators.go

@@ -0,0 +1,34 @@
+package validators
+
+import (
+	"context"
+	"strings"
+
+	"gopkg.in/go-playground/validator.v9"
+)
+
+var (
+	CustomValidators = map[string]customValidator{
+		"enum": {
+			Message:   "This field should be in: %v",
+			Validator: validateEnum,
+		},
+		"required": {
+			Message: "This field is required and cannot be empty",
+		},
+	}
+)
+
+type customValidator struct {
+	Message   string
+	Validator validator.FuncCtx
+}
+
+func validateEnum(ctx context.Context, fl validator.FieldLevel) bool {
+	for _, v := range strings.Split(fl.Param(), " ") {
+		if v == fl.Field().String() {
+			return true
+		}
+	}
+	return false
+}