refactor: restructure files to their domains, new preview overlay system, and dep graph

1 files changed, 38 insertions, 0 deletions

diff --git a/apps/web/src/timeline/element-snap-source.ts b/apps/web/src/timeline/element-snap-source.ts
new file mode 100644
index 00000000..ec1e5f65
--- /dev/null
+++ b/apps/web/src/timeline/element-snap-source.ts
@@ -0,0 +1,38 @@
+import type { SceneTracks } from "@/timeline";
+import type { SnapPoint } from "@/timeline/snapping";
+
+export function getElementEdgeSnapPoints({
+	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;
+			}
+
+			snapPoints.push(
+				{
+					time: element.startTime,
+					type: "element-start",
+					elementId: element.id,
+					trackId: track.id,
+				},
+				{
+					time: element.startTime + element.duration,
+					type: "element-end",
+					elementId: element.id,
+					trackId: track.id,
+				},
+			);
+		}
+	}
+
+	return snapPoints;
+}