Initial

server/services/hostGroupWorker.js

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+import { getStringSetting } from '../models/settingsModel.js';
+import { syncDynamicHostGroups } from '../models/hostGroupModel.js';
+import { logger } from './logger.js';
+
+let timer = null;
+let running = false;
+
+export function hostGroupSyncIntervalMinutes() {
+  const minutes = Number(getStringSetting('host_group_sync_interval_minutes', process.env.HOST_GROUP_SYNC_INTERVAL_MINUTES || '60'));
+  return Number.isFinite(minutes) ? minutes : 60;
+}
+
+export function startHostGroupWorker() {
+  const minutes = hostGroupSyncIntervalMinutes();
+  if (minutes <= 0) return null;
+  running = true;
+  scheduleNext(minutes);
+  logger.info(`host group sync scheduled every ${minutes} minute(s)`);
+  return timer;
+}
+
+export function stopHostGroupWorker() {
+  running = false;
+  if (timer) clearTimeout(timer);
+  timer = null;
+}
+
+function scheduleNext(minutes) {
+  if (!running || minutes <= 0) return;
+  timer = setTimeout(() => {
+    try {
+      const summary = syncDynamicHostGroups();
+      logger.info('host group sync complete', summary);
+    } catch (error) {
+      logger.error('host group sync failed', { error: error.message });
+    } finally {
+      scheduleNext(hostGroupSyncIntervalMinutes());
+    }
+  }, minutes * 60 * 1000);
+  timer.unref?.();
+}