OpenCut/apps/web/src/lib/commands/timeline/element/toggle-elements-hidden.ts

import { Command } from "@/lib/commands/base-command";
import type { TimelineTrack } from "@/types/timeline";
import { canBeHidden } from "@/lib/timeline/element-utils";
import { EditorCore } from "@/core";

export class ToggleElementsHiddenCommand extends Command {
  private savedState: TimelineTrack[] | null = null;

  constructor(private elements: { trackId: string; elementId: string }[]) {
    super();
  }

  execute(): void {
    const editor = EditorCore.getInstance();
    this.savedState = editor.timeline.getTracks();

    const shouldHide = this.elements.some(({ trackId, elementId }) => {
      const track = this.savedState?.find((t) => t.id === trackId);
      const element = track?.elements.find((e) => e.id === elementId);
      return element && canBeHidden(element) && !element.hidden;
    });

    const updatedTracks = this.savedState.map((track) => {
      const newElements = track.elements.map((element) => {
        const shouldUpdate = this.elements.some(
          ({ trackId, elementId }) =>
            track.id === trackId && element.id === elementId,
        );
        return shouldUpdate &&
          canBeHidden(element) &&
          element.hidden !== shouldHide
          ? { ...element, hidden: shouldHide }
          : element;
      });
      return { ...track, elements: newElements } as typeof track;
    });

    editor.timeline.updateTracks(updatedTracks);
  }

  undo(): void {
    if (this.savedState) {
      const editor = EditorCore.getInstance();
      editor.timeline.updateTracks(this.savedState);
    }
  }
}