const Settings = require('settings-sharelatex') const { MongoClient, ObjectId } = require('mongodb') const clientPromise = MongoClient.connect( Settings.mongo.url, Settings.mongo.options ) let setupDbPromise async function waitForDb() { if (!setupDbPromise) { setupDbPromise = setupDb() } await setupDbPromise } const db = {} async function setupDb() { const internalDb = (await clientPromise).db() db.docs = internalDb.collection('docs') db.docOps = internalDb.collection('docOps') } async function addCollection(name) { await waitForDb() const internalDb = (await clientPromise).db() db[name] = internalDb.collection(name) } module.exports = { db, ObjectId, addCollection, waitForDb }