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validation.go
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validation.go
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package validation
import (
"reflect"
"regexp"
"strings"
"github.com/go-playground/validator/v10"
)
var (
// validation message
invalidMin = "value must be at least"
invalidRequired = "value must be required"
invalidEmail = "value must be a valid email"
invalidDefaultMsg = "value must be validate"
)
type (
Validation struct {
validate *validator.Validate
}
FieldError struct {
Key string `json:"key"`
Type string `json:"type"`
Message string `json:"message"`
Value string `json:"value"`
}
)
func New() *Validation {
valid := &Validation{
validate: validator.New(),
}
// valid.validate.RegisterValidation("boolean", boolean, true)
return valid
}
func (v *Validation) Validate(i interface{}) error {
if i == nil {
return &validator.InvalidValidationError{Type: reflect.TypeOf(i)}
}
return v.validate.Struct(i)
}
func (v *Validation) ValidateVar(fl interface{}, tag string) error {
if fl == nil {
return &validator.InvalidValidationError{Type: reflect.TypeOf(fl)}
}
return v.validate.Var(fl, tag)
}
func (v *Validation) ExtractErrorMessage(err error) []FieldError {
result := make([]FieldError, 0)
un := "unknown"
if _, ok := err.(*validator.InvalidValidationError); ok {
result = append(result, FieldError{Key: un, Type: un, Message: err.Error(), Value: un})
return result
}
for _, err := range err.(validator.ValidationErrors) {
temp := FieldError{
Key: v.snakeCaseField(err.StructField()),
Type: err.Type().String(),
Message: v.messageValidation(err),
Value: err.Value().(string),
}
result = append(result, temp)
}
return result
}
func (v *Validation) messageValidation(e validator.FieldError) (msg string) {
switch e.Tag() {
case "min":
msg = invalidMin
case "required":
msg = invalidRequired
case "email":
msg = invalidEmail
default:
msg = invalidDefaultMsg
}
if e.Param() != "" {
msg = msg + " " + e.Param()
}
return msg
}
func (v *Validation) snakeCaseField(str string) string {
var matchFirstCap = regexp.MustCompile("(.)([A-Z][a-z]+)")
var matchAllCap = regexp.MustCompile("([a-z0-9])([A-Z])")
snake := matchFirstCap.ReplaceAllString(str, "${1}_${2}")
snake = matchAllCap.ReplaceAllString(snake, "${1}_${2}")
return strings.ToLower(snake)
}
//
// func detailsMessageError(errs validator.ValidationErrors) {
// for _, err := range errs {
// log.Println("Namespace -> ", err.Namespace())
// log.Println("Field -> ", err.Field())
// log.Println("StructNamespace -> ", err.StructNamespace())
// log.Println("StructField -> ", err.StructField())
// log.Println("Tag -> ", err.Tag())
// log.Println("ActualTag -> ", err.ActualTag())
// log.Println("Kind -> ", err.Kind())
// log.Println("Type -> ", err.Type())
// log.Println("Value -> ", err.Value())
// log.Println("Param -> ", err.Param())
// log.Println()
// }
// }
//
// ... implements validator.Func
// func boolean(fl validator.FieldLevel) bool {
// return true
/*
// log.Println("-", reflect.Zero(fl.Field().Type()).Interface())
// log.Println("0", fl.Field().Interface())
// log.Println("00", fl.Field().IsValid())
// log.Println("000", fl.Field().IsZero())
// log.Println("1", fl.Field())
// log.Println("2", fl.Field().Kind())
// log.Println("3", reflect.Bool)
// log.Println("4", fl.Field().String())
// //
// field := fl.Field()
// if field.Kind() == reflect.Bool {
// return field.String() != ""
// }
// return false
// // //
// // v, a, c := fl.ExtractType(fl.Field())
// // log.Println("a", v)
// // log.Println("b", a)
// // log.Println("c", c)
// // log.Println("--", v.Kind().String() == "bool")
// // return v.Kind().String() == "bool"
*/
// }