1 files changed, 17 insertions, 0 deletions
diff --git a/apps/web/src/ripple/shift.ts b/apps/web/src/ripple/shift.ts
new file mode 100644
index 00000000..a88d2b2d
--- /dev/null
+++ b/apps/web/src/ripple/shift.ts
@@ -0,0 +1,17 @@
+import type { TimelineElement } from "@/timeline/types";
+
+export function rippleShiftElements<TElement extends TimelineElement>({
+	elements,
+	afterTime,
+	shiftAmount,
+}: {
+	elements: TElement[];
+	afterTime: number;
+	shiftAmount: number;
+}): TElement[] {
+	return elements.map((element) =>
+		element.startTime >= afterTime
+			? ({ ...element, startTime: element.startTime - shiftAmount } as TElement)
+			: element,
+	);
+}