// ------------------------------------------------------------------------
//   Project atila
//   Active Thing (activething.com) git.activething.com/go
//
//   File name  rpacker_pointer.go
//   Created by DEV
//   Modified   09/02/2024
//
//   Copyright 2024 activething.com 
// ------------------------------------------------------------------------
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ------------------------------------------------------------------------

package pkjson

import (
	"apacks"
	"codecs/cjson"
	"reflect"
)

type (

	rPointer struct {
		elemPackFn rPackerFnc
	}

)

func rPointerPacker (rtype reflect.Type) rPackerFnc {
	return (*newRPointer(rtype)).pack
}


func newRPointer (rtype reflect.Type) *rPointer {
	return &rPointer { elemPackFn: rTypePacker(rtype.Elem()) }
}


func (p rPointer) pack (s *apacks.State, v reflect.Value, f apacks.Flags) {
	if v.IsNil() {
		s.W(cjson.G.NullValue)
		return
	}
	s.Level++
	if s.Level > maxCyclesAfter {
		if fn,ok := s.CheckCycle(v.Interface()); ok {
			defer fn()
		} else {
			return
		}
	}
	p.elemPackFn(s,v.Elem(),f)
	s.Level--
}