in functions/garbageCollector.js [34:48]
async function deleteOldPings(batchSize, dateTo) {
const db = admin.firestore();
const pingsQuery = db.collection('pings')
.where('addedAt', '<', dateTo)
.limit(batchSize);
const clientsQuery = db.collection('clients')
.where('lastActive', '<', dateTo)
.limit(batchSize);
const numDeletedPings = await deleteQueryBatch(db, pingsQuery);
console.log("Deleted pings: " + numDeletedPings);
const numDeletedClients = await deleteQueryBatch(db, clientsQuery);
console.log("Deleted clients: " + numDeletedClients);
}