apps/web/src/lib/commands/timeline/element/update-element-duration.ts


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

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

	constructor(
		private trackId: string,
		private elementId: string,
		private duration: number,
	) {
		super();
	}

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

		const updatedTracks = this.savedState.map((t) => {
			if (t.id !== this.trackId) return t;
			const newElements = t.elements.map((el) =>
				el.id === this.elementId ? { ...el, duration: this.duration } : el,
			);
			return { ...t, elements: newElements } as typeof t;
		});

		editor.timeline.updateTracks(updatedTracks);
	}

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