구조도 저장한다

import {validateEffects,type LayerEffects} from './layer-effects.ts';

export type StyleSnapshot={effects:LayerEffects;nativeEffects?:string;original?:string};
export function hasLayerStyle(layer?:Layer){return !!layer&&(Object.keys(layer.effects??{}).length>0||!!layer.psdData?.effects);}
export function validateStyleSnapshot(value:StyleSnapshot){
 if(!value||typeof value!=='object')throw Error('Missing copied layer style.');
 validateEffects(value.effects);

export function validateBlendIf(b:BlendIf){if(!b||typeof b.enabled!=='boolean'||!['gray','red','green','blue','cyan','magenta','yellow','black','lightness','a','b'].includes(b.channel))throw Error('Invalid Blend If settings.');for(const a of [b.source,b.underlying])if(!Array.isArray(a)||a.length!==4||a.some((v,i)=>!Number.isFinite(v)||v<0||v>255||(i>0&&v<a[i-1])))throw Error('Invalid Blend If range.');if(b.additional){if(!Array.isArray(b.additional)||b.additional.length>4||new Set([b.channel,...b.additional.map(r=>r.channel)]).size!==b.additional.length+1)throw Error('Invalid additional Blend If channels.');for(const range of b.additional)validateBlendIf({...range,enabled:true,additional:undefined});}}
// The two halves define a continuous ramp; an unsplit endpoint remains fully included.
export function tonalWeight(v:number,r:TonalRange){const [a,b,c,d]=r;return (v<a?0:v<b?(v-a)/(b-a):1)*(v>d?0:v>c?(d-v)/(d-c):1);}

export type CompLayer = Pick<Layer,'id'> & Partial<Pick<Layer,'visible'|'x'|'y'|'width'|'height'|'rotation'|'transformQuad'|'flipX'|'flipY'|'opacity'|'fill'|'blend'|'effects'>>;
export type CompGroup = Pick<LayerGroup,'id'> & Partial<Pick<LayerGroup,'visible'|'opacity'|'fill'|'blend'|'effects'>>;
export type LayerComp = {id:string;name:string;comment?:string;capturedInfo?:number;nativeId?:number;groups?:CompGroup[];layers:CompLayer[]};
export const VISIBILITY=1,POSITION=2,APPEARANCE=4;
const positionKeys=['x','y','width','height','rotation','transformQuad','flipX','flipY'] as const;
const appearanceKeys=['opacity','fill','blend','effects'] as const;
export function captureComp(doc:StudioDoc,name:string,flags=7,comment='',previous?:LayerComp):LayerComp {
 if(!Number.isInteger(flags)||flags<1||flags>7)throw Error('Choose at least one property to capture.');
 return {id:previous?.id??uid(),nativeId:previous?.nativeId,name:name.trim()||'Layer Comp',comment,capturedInfo:flags,
  layers:doc.layers.map(l=>{const s:CompLayer={id:l.id};if(flags&VISIBILITY)s.visible=l.visible;if(flags&POSITION)for(const k of positionKeys)(s as any)[k]=structuredClone(l[k]);if(flags&APPEARANCE)for(const k of appearanceKeys)(s as any)[k]=structuredClone(l[k]);return s;}),
  groups:doc.groups?.map(g=>{const s:CompGroup={id:g.id};if(flags&VISIBILITY)s.visible=g.visible;if(flags&APPEARANCE)for(const k of appearanceKeys)(s as any)[k]=structuredClone(g[k]);return s;})};