lumi

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package lumi
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import (
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	"fmt"
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	kelo "gitverse.ru/metalcore/kelo"
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	"gitverse.ru/metalcore/lumi/base"
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)
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type Ref[T any] struct {
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	nodes map[kelo.NodeValuer]kelo.NodeValuer
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	value T
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	bonds []base.Updater
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}
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func NewRef[T any](value T) *Ref[T] {
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	return &Ref[T]{
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		nodes: make(map[kelo.NodeValuer]kelo.NodeValuer),
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		value: value,
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	}
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}
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func (r *Ref[T]) Get() T {
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	return r.value
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}
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func (r *Ref[T]) Set(value T) {
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	r.value = value
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	if len(r.nodes) > 0 {
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		for _, node := range r.nodes {
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			node.SetNodeValue(r.String())
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		}
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	}
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	for _, bond := range r.bonds {
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		bond.Update()
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	}
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}
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func (r *Ref[T]) Stick(updater base.Updater) {
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	for _, bond := range r.bonds {
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		if bond == updater {
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			return
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		}
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	}
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	r.bonds = append(r.bonds, updater)
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}
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func (r *Ref[T]) UnStick(updater base.Updater) {
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	for i, bond := range r.bonds {
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		if bond != updater {
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			continue
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		}
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		r.bonds = append(r.bonds[:i], r.bonds[i+1:]...)
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		return
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	}
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}
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func (r *Ref[T]) String() string {
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	return fmt.Sprintf("%v", r.value)
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}
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func (r *Ref[T]) Render(parent kelo.NodeValuer) kelo.NodeValuer {
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	if _, ok := r.nodes[parent]; !ok {
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		r.nodes[parent] = kelo.GetDocument().CreateTextNode(r.String())
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	}
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	return r.nodes[parent]
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}
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