1 files changed, 23 insertions, 0 deletions
diff --git a/apps/web/src/lib/timeline/index.ts b/apps/web/src/lib/timeline/index.ts
new file mode 100644
index 00000000..f3ace94f
--- /dev/null
+++ b/apps/web/src/lib/timeline/index.ts
@@ -0,0 +1,23 @@
+import type { TimelineTrack } from "@/types/timeline";
+
+export * from "./track-utils";
+export * from "./element-utils";
+export * from "./zoom-utils";
+export * from "./ruler-utils";
+
+export function calculateTotalDuration({
+	tracks,
+}: {
+	tracks: TimelineTrack[];
+}): number {
+	if (tracks.length === 0) return 0;
+
+	const trackEndTimes = tracks.map((track) =>
+		track.elements.reduce((maxEnd, element) => {
+			const elementEnd = element.startTime + element.duration;
+			return Math.max(maxEnd, elementEnd);
+		}, 0),
+	);
+
+	return Math.max(...trackEndTimes, 0);
+}