orphanDBs.js

const Dotenv = require('dotenv')
const Winston = require('winston')
const Mongo = require('mongodb').MongoClient
var XervoHost

Dotenv.config()

const createURI = (port, user, password) => {
  if (!user || !password) {
    return `mongodb://localhost:${port}`
  }
  return `mongodb://${user}:${password}@localhost:${port}`
}

const xervoURI = `${createURI(process.env.MONGO_DB_PORT)}/Modulus`
Mongo.connect(xervoURI, (err, db) => {
  if (err) Winston.error(err)

  Winston.info('Connected to Internal Xervo DB')

  XervoHost = db
})

const dbURI = createURI(process.env.MONGO_DB_PORT,
  process.env.MONGO_HOST_ADMIN_USER,
  process.env.MONGO_HOST_ADMIN_PASSWORD)

Mongo.connect(dbURI, (err, db) => {
  if (err) Winston.error(err)

  Winston.info('Connected to Customer DB host')

  if (!XervoHost) {
    Winston.error('Not connected to Xervo DB. Aborting')
    db.close()

    return
  }

  db.admin().listDatabases().then((result) => {
    let dbs = result.databases
    Winston.info(`retreived ${dbs.length} databases on host`)

    dbs.map((db) => {
      XervoHost.collection('Databases').findOne({ id: db.name }, (err, result) => {
        if (err) Winston.error(err)
        
        Winston.info(result)
      })
    }).catch((err) => {
      Winston.error(err)
      
      db.close()
      if (XervoHost) XervoHost.close()
    })
  })
})