From 70a6d58b8432e455ab1443d45bc23dd70b363bea Mon Sep 17 00:00:00 2001
From: Maze Winther <mazewinther@gmail.com>
Date: Tue, 31 Mar 2026 15:47:30 +0200
Subject: refactor: centralize track placement into its own module

---
 .../src/lib/timeline/placement/compatibility.ts    | 51 ++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 apps/web/src/lib/timeline/placement/compatibility.ts

(limited to 'apps/web/src/lib/timeline/placement/compatibility.ts')

diff --git a/apps/web/src/lib/timeline/placement/compatibility.ts b/apps/web/src/lib/timeline/placement/compatibility.ts
new file mode 100644
index 00000000..de1baff3
--- /dev/null
+++ b/apps/web/src/lib/timeline/placement/compatibility.ts
@@ -0,0 +1,51 @@
+import type { ElementType, TrackType } from "@/lib/timeline";
+
+const ELEMENT_TRACK_MAP: Record<ElementType, TrackType> = {
+	audio: "audio",
+	text: "text",
+	sticker: "graphic",
+	graphic: "graphic",
+	effect: "effect",
+	video: "video",
+	image: "video",
+};
+
+export function getTrackTypeForElementType({
+	elementType,
+}: {
+	elementType: ElementType;
+}): TrackType {
+	return ELEMENT_TRACK_MAP[elementType];
+}
+
+export function canElementGoOnTrack({
+	elementType,
+	trackType,
+}: {
+	elementType: ElementType;
+	trackType: TrackType;
+}): boolean {
+	return getTrackTypeForElementType({ elementType }) === trackType;
+}
+
+export function validateElementTrackCompatibility({
+	element,
+	track,
+}: {
+	element: { type: ElementType };
+	track: { type: TrackType };
+}): { isValid: boolean; errorMessage?: string } {
+	const isValid = canElementGoOnTrack({
+		elementType: element.type,
+		trackType: track.type,
+	});
+
+	if (!isValid) {
+		return {
+			isValid: false,
+			errorMessage: `${element.type} elements cannot be placed on ${track.type} tracks`,
+		};
+	}
+
+	return { isValid: true };
+}
-- 
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