86 lines
2.0 KiB
Go
86 lines
2.0 KiB
Go
// Copyright 2017 Manu Martinez-Almeida. All rights reserved.
|
|
// Use of this source code is governed by a MIT style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package binding
|
|
|
|
import (
|
|
"fmt"
|
|
"reflect"
|
|
"strings"
|
|
"sync"
|
|
|
|
"github.com/go-playground/validator/v10"
|
|
)
|
|
|
|
type defaultValidator struct {
|
|
once sync.Once
|
|
validate *validator.Validate
|
|
}
|
|
|
|
type sliceValidateError []error
|
|
|
|
func (err sliceValidateError) Error() string {
|
|
var errMsgs []string
|
|
for i, e := range err {
|
|
if e == nil {
|
|
continue
|
|
}
|
|
errMsgs = append(errMsgs, fmt.Sprintf("[%d]: %s", i, e.Error()))
|
|
}
|
|
return strings.Join(errMsgs, "\n")
|
|
}
|
|
|
|
var _ StructValidator = &defaultValidator{}
|
|
|
|
// ValidateStruct receives any kind of type, but only performed struct or pointer to struct type.
|
|
func (v *defaultValidator) ValidateStruct(obj interface{}) error {
|
|
if obj == nil {
|
|
return nil
|
|
}
|
|
|
|
value := reflect.ValueOf(obj)
|
|
switch value.Kind() {
|
|
case reflect.Ptr:
|
|
return v.ValidateStruct(value.Elem().Interface())
|
|
case reflect.Struct:
|
|
return v.validateStruct(obj)
|
|
case reflect.Slice, reflect.Array:
|
|
count := value.Len()
|
|
validateRet := make(sliceValidateError, 0)
|
|
for i := 0; i < count; i++ {
|
|
if err := v.ValidateStruct(value.Index(i).Interface()); err != nil {
|
|
validateRet = append(validateRet, err)
|
|
}
|
|
}
|
|
if len(validateRet) == 0 {
|
|
return nil
|
|
}
|
|
return validateRet
|
|
default:
|
|
return nil
|
|
}
|
|
}
|
|
|
|
// validateStruct receives struct type
|
|
func (v *defaultValidator) validateStruct(obj interface{}) error {
|
|
v.lazyinit()
|
|
return v.validate.Struct(obj)
|
|
}
|
|
|
|
// Engine returns the underlying validator engine which powers the default
|
|
// Validator instance. This is useful if you want to register custom validations
|
|
// or struct level validations. See validator GoDoc for more info -
|
|
// https://godoc.org/gopkg.in/go-playground/validator.v8
|
|
func (v *defaultValidator) Engine() interface{} {
|
|
v.lazyinit()
|
|
return v.validate
|
|
}
|
|
|
|
func (v *defaultValidator) lazyinit() {
|
|
v.once.Do(func() {
|
|
v.validate = validator.New()
|
|
v.validate.SetTagName("binding")
|
|
})
|
|
}
|