progress indicator added

lib/jobs.ts

@@ -0,0 +1,33 @@
+import { rm } from "node:fs/promises";
+
+type Job = {
+  dir: string;
+  zipPath: string;
+  createdAt: number;
+};
+
+const JOB_TTL_MS = 15 * 60 * 1000;
+const jobs = new Map<string, Job>();
+
+function sweepExpiredJobs(): void {
+  const cutoff = Date.now() - JOB_TTL_MS;
+  for (const [id, job] of jobs) {
+    if (job.createdAt > cutoff) continue;
+    jobs.delete(id);
+    void rm(job.dir, { recursive: true, force: true });
+  }
+}
+
+export function saveJob(dir: string, zipPath: string): string {
+  sweepExpiredJobs();
+  const id = crypto.randomUUID();
+  jobs.set(id, { dir, zipPath, createdAt: Date.now() });
+  return id;
+}
+
+export function takeJob(id: string): Job | null {
+  const job = jobs.get(id);
+  if (!job) return null;
+  jobs.delete(id);
+  return job;
+}