1 files changed, 37 insertions, 0 deletions
diff --git a/apps/web/src/lib/commands/timeline/element/update-element-duration.ts b/apps/web/src/lib/commands/timeline/element/update-element-duration.ts
new file mode 100644
index 00000000..6b3a860b
--- /dev/null
+++ b/apps/web/src/lib/commands/timeline/element/update-element-duration.ts
@@ -0,0 +1,37 @@
+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);
+		}
+	}
+}