version 2 build

src/server/services/cron-util.ts

@@ -0,0 +1,14 @@
+/**
+ * Convert a polling interval in seconds into a cron expression.
+ * Pure and side-effect free so it can be unit-tested without touching the DB.
+ *  - < 60s            → every minute ("* * * * *")
+ *  - < 60 minutes     → every N minutes ("*\/15 * * * *")
+ *  - otherwise        → every N hours ("0 *\/6 * * *")
+ */
+export function secondsToCron(seconds: number): string {
+  if (seconds < 60) return '* * * * *'
+  const minutes = Math.round(seconds / 60)
+  if (minutes < 60) return `*/${minutes} * * * *`
+  const hours = Math.round(minutes / 60)
+  return `0 */${hours} * * *`
+}