1 files changed, 81 insertions, 0 deletions
diff --git a/apps/web/src/services/storage/migrations/transformers/v2-to-v3.ts b/apps/web/src/services/storage/migrations/transformers/v2-to-v3.ts
new file mode 100644
index 00000000..33656109
--- /dev/null
+++ b/apps/web/src/services/storage/migrations/transformers/v2-to-v3.ts
@@ -0,0 +1,81 @@
+import { getProjectDurationFromScenes } from "@/lib/scenes";
+import type { TScene } from "@/types/timeline";
+import type { MigrationResult, ProjectRecord } from "./types";
+
+export function transformProjectV2ToV3({
+	project,
+}: {
+	project: ProjectRecord;
+}): MigrationResult<ProjectRecord> {
+	const projectId = getProjectId({ project });
+	if (!projectId) {
+		return { project, skipped: true, reason: "no project id" };
+	}
+
+	if (isV3Project({ project })) {
+		return { project, skipped: true, reason: "already v3" };
+	}
+
+	const scenes = getScenes({ project });
+	const duration = getProjectDurationFromScenes({ scenes });
+
+	const metadataValue = project.metadata;
+	const metadata = isRecord(metadataValue)
+		? { ...metadataValue, duration }
+		: { duration };
+
+	const migratedProject = {
+		...project,
+		metadata,
+		version: 3,
+	};
+
+	return { project: migratedProject, skipped: false };
+}
+
+export function getProjectId({
+	project,
+}: {
+	project: ProjectRecord;
+}): string | null {
+	const idValue = project.id;
+	if (typeof idValue === "string" && idValue.length > 0) {
+		return idValue;
+	}
+
+	const metadataValue = project.metadata;
+	if (!isRecord(metadataValue)) {
+		return null;
+	}
+
+	const metadataId = metadataValue.id;
+	if (typeof metadataId === "string" && metadataId.length > 0) {
+		return metadataId;
+	}
+
+	return null;
+}
+
+function getScenes({ project }: { project: ProjectRecord }): TScene[] {
+	const scenesValue = project.scenes;
+	if (!Array.isArray(scenesValue)) {
+		return [];
+	}
+
+	return scenesValue.filter(isRecord) as unknown as TScene[];
+}
+
+function isV3Project({ project }: { project: ProjectRecord }): boolean {
+	const versionValue = project.version;
+	if (typeof versionValue === "number" && versionValue >= 3) {
+		return true;
+	}
+
+	return (
+		isRecord(project.metadata) && typeof project.metadata.duration === "number"
+	);
+}
+
+function isRecord(value: unknown): value is ProjectRecord {
+	return typeof value === "object" && value !== null;
+}