darkwire.io/server/src/inactive_rooms.js

import getStore from './store/index.js';

export async function pollForInactiveRooms() {
  const store = getStore();

  console.log('Checking for inactive rooms...');
  const rooms = (await store.getAll('rooms')) || {};
  console.log(`${Object.keys(rooms).length} rooms found`);

  Object.keys(rooms).forEach(async roomId => {
    const room = JSON.parse(rooms[roomId]);
    const timeSinceUpdatedInSeconds = (Date.now() - room.updatedAt) / 1000;
    const timeSinceUpdatedInDays = Math.round(timeSinceUpdatedInSeconds / 60 / 60 / 24);
    if (timeSinceUpdatedInDays > 7) {
      console.log(`Deleting roomId ${roomId} which hasn't been used in ${timeSinceUpdatedInDays} days`);
      await store.del('rooms', roomId);
    }
  });

  setTimeout(pollForInactiveRooms, 1000 * 60 * 60 * 12); // every 12 hours
}