// Copyright 2018 The OpenPitrix Authors. All rights reserved.
// Use of this source code is governed by a Apache license
// that can be found in the LICENSE file.

package reflectutil

import "reflect"

func In(value interface{}, container interface{}) bool {
	containerValue := reflect.ValueOf(container)
	switch reflect.TypeOf(container).Kind() {
	case reflect.Slice, reflect.Array:
		for i := 0; i < containerValue.Len(); i++ {
			if containerValue.Index(i).Interface() == value {
				return true
			}
		}
	case reflect.Map:
		if containerValue.MapIndex(reflect.ValueOf(value)).IsValid() {
			return true
		}
	default:
		return false
	}
	return false
}

func ValueIsNil(value reflect.Value) bool {
	k := value.Kind()
	switch k {
	case reflect.Chan, reflect.Func, reflect.Map, reflect.Ptr, reflect.Interface, reflect.Slice:
		return value.IsNil()
	case reflect.Invalid:
		return true
	}
	// base type had default value, is not nil
	return false
}