forked from ebhomengo/niki
58 lines
1.5 KiB
Go
58 lines
1.5 KiB
Go
|
// Copyright 2016 Qiang Xue. All rights reserved.
|
||
|
|
// Use of this source code is governed by a MIT-style
|
||
|
|
// license that can be found in the LICENSE file.
|
||
|
|
|
||
|
|
package validation
|
||
|
|
|
||
|
|
import (
|
||
|
|
"reflect"
|
||
|
|
)
|
||
|
|
|
||
|
|
// ErrInInvalid is the error that returns in case of an invalid value for "in" rule.
|
||
|
|
var ErrInInvalid = NewError("validation_in_invalid", "must be a valid value")
|
||
|
|
|
||
|
|
// In returns a validation rule that checks if a value can be found in the given list of values.
|
||
|
|
// reflect.DeepEqual() will be used to determine if two values are equal.
|
||
|
|
// For more details please refer to https://golang.org/pkg/reflect/#DeepEqual
|
||
|
|
// An empty value is considered valid. Use the Required rule to make sure a value is not empty.
|
||
|
|
func In(values ...interface{}) InRule {
|
||
|
|
return InRule{
|
||
|
|
elements: values,
|
||
|
|
err: ErrInInvalid,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// InRule is a validation rule that validates if a value can be found in the given list of values.
|
||
|
|
type InRule struct {
|
||
|
|
elements []interface{}
|
||
|
|
err Error
|
||
|
|
}
|
||
|
|
|
||
|
|
// Validate checks if the given value is valid or not.
|
||
|
|
func (r InRule) Validate(value interface{}) error {
|
||
|
|
value, isNil := Indirect(value)
|
||
|
|
if isNil || IsEmpty(value) {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
for _, e := range r.elements {
|
||
|
|
if reflect.DeepEqual(e, value) {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return r.err
|
||
|
|
}
|
||
|
|
|
||
|
|
// Error sets the error message for the rule.
|
||
|
|
func (r InRule) Error(message string) InRule {
|
||
|
|
r.err = r.err.SetMessage(message)
|
||
|
|
return r
|
||
|
|
}
|
||
|
|
|
||
|
|
// ErrorObject sets the error struct for the rule.
|
||
|
|
func (r InRule) ErrorObject(err Error) InRule {
|
||
|
|
r.err = err
|
||
|
|
return r
|
||
|
|
}
|