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// ------------------------------------------------------------------------
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// ℹ️ Project active3
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// 🔗 Active Thing (activething.com) git.activething.com/go
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//
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// File name builder_state.go
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// ✍️ Created by DEV
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// 📅 Modified 04/05/2024
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//
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// 🔒 Copyright 2024 activething.com
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//
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// 📜 LICENSE --------------------------------------------------------------
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// ------------------------------------------------------------------------
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package state
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type (
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BuilderState struct {
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Current Element
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Level int
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Pos int
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Error error
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levelsItem []int
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cyclesCheck map[any]struct{}
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}
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BuilderStateFnc func(state *BuilderState)
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)
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func NewBuilderState (options ...BuilderStateFnc) *BuilderState {
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return (&BuilderState{}).init(options) }
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func (s *BuilderState) init (options []BuilderStateFnc) *BuilderState {
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for _,o := range options { o(s) }
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return s
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}
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func (s *BuilderState) Items() int {
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if s.Error == nil {
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return -1
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}
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return s.levelsItem[s.Level]
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}
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func (s *BuilderState) Open (element Element) {
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s.Level++
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s.levelsItem = append(s.levelsItem,0)
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}
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func (s *BuilderState) Close(element Element) {
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s.Level--
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if s.Level < 0 {
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s.SetError(G.ErrStateInvalidLevel)
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return
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}
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s.levelsItem = s.levelsItem[:len(s.levelsItem)-1]
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}
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func (s *BuilderState) IncItems () {
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if s.Error != nil {
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s.levelsItem[s.Level]++
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}
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}
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func (s *BuilderState) CheckCycle(ptr any) (func(),bool) {
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if _,hs := s.cyclesCheck[ptr]; hs {
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s.SetError(G.ErrCircularReference)
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return nil,false
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}
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s.cyclesCheck[ptr]=struct{}{}
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return func(){ delete(s.cyclesCheck,ptr) }, true
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}
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func (s *BuilderState) SetError (err error) {
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s.Error = err
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}
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