updates

server/pkg/validator/validator.go

@@ -0,0 +1,67 @@
+// pkg/validator/validator.go
+package validator
+
+import (
+	"log"
+	"regexp"
+	"strings"
+
+	"github.com/go-playground/validator/v10"
+)
+
+var (
+	validate   *validator.Validate
+	emailRegex = regexp.MustCompile(`^[a-z0-9._%+\-]+@[a-z0-9.\-]+\.[a-z]{2,4}$`)
+)
+
+func init() {
+	validate = validator.New()
+
+	// Register custom validation
+	err := validate.RegisterValidation("email", validateEmail)
+	if err != nil {
+		log.Print(err)
+	}
+}
+
+func validateEmail(fl validator.FieldLevel) bool {
+	return emailRegex.MatchString(fl.Field().String())
+}
+
+// ValidationError represents a validation error
+type ValidationError struct {
+	Field   string `json:"field"`
+	Message string `json:"message"`
+}
+
+// Validate validates a struct and returns validation errors
+func Validate(i interface{}) []ValidationError {
+	var errors []ValidationError
+
+	err := validate.Struct(i)
+	if err != nil {
+		for _, err := range err.(validator.ValidationErrors) {
+			var element ValidationError
+			element.Field = strings.ToLower(err.Field())
+			element.Message = generateValidationMessage(err)
+			errors = append(errors, element)
+		}
+	}
+
+	return errors
+}
+
+func generateValidationMessage(err validator.FieldError) string {
+	switch err.Tag() {
+	case "required":
+		return "This field is required"
+	case "email":
+		return "Invalid email format"
+	case "min":
+		return "Value must be greater than " + err.Param()
+	case "max":
+		return "Value must be less than " + err.Param()
+	default:
+		return "Invalid value"
+	}
+}