overleaf/services/document-updater/app/coffee/mongojs.js

/*
 * decaffeinate suggestions:
 * DS102: Remove unnecessary code created because of implicit returns
 * DS207: Consider shorter variations of null checks
 * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
 */
const Settings = require("settings-sharelatex");
const mongojs = require("mongojs");
const db = mongojs(Settings.mongo.url, ["docSnapshots"]);

module.exports = {
	db,
	ObjectId: mongojs.ObjectId,
	healthCheck(callback) {
		return db.runCommand({ping: 1}, function(err, res) {
			if (err != null) { return callback(err); }
			if (!res.ok) { return callback(new Error("failed mongo ping")); }
			return callback();
		});
	}
};