refactor: split animation helpers by domain

1 files changed, 36 insertions, 0 deletions

diff --git a/apps/web/src/timeline/animation-snap-points.ts b/apps/web/src/timeline/animation-snap-points.ts
new file mode 100644
index 00000000..e64de11f
--- /dev/null
+++ b/apps/web/src/timeline/animation-snap-points.ts
@@ -0,0 +1,36 @@
+import { getElementKeyframes } from "@/animation";
+import type { SceneTracks } from "@/timeline";
+import type { SnapPoint } from "@/timeline/snapping";
+import { addMediaTime } from "@/wasm";
+
+export function getAnimationKeyframeSnapPointsForTimeline({
+	tracks,
+	excludeElementIds,
+}: {
+	tracks: SceneTracks;
+	excludeElementIds?: Set<string>;
+}): SnapPoint[] {
+	const snapPoints: SnapPoint[] = [];
+	const orderedTracks = [...tracks.overlay, tracks.main, ...tracks.audio];
+
+	for (const track of orderedTracks) {
+		for (const element of track.elements) {
+			if (excludeElementIds?.has(element.id)) {
+				continue;
+			}
+
+			for (const keyframe of getElementKeyframes({
+				animations: element.animations,
+			})) {
+				snapPoints.push({
+					time: addMediaTime({ a: element.startTime, b: keyframe.time }),
+					type: "keyframe",
+					elementId: element.id,
+					trackId: track.id,
+				});
+			}
+		}
+	}
+
+	return snapPoints;
+}