const config = require('./config');
const MongoClient = require( 'mongodb' ).MongoClient;
const uri = config.mongodbHost;
let db;

module.exports = {
  connectToServer: function( callback ) {
    MongoClient.connect( uri,  { useNewUrlParser: true,  useUnifiedTopology: true }, function( err, client ) {
      if(err) throw err;
      console.log('mongodb-checkConnection'+client===undefined);
      if (client !== undefined) console.log(client.isConnected());
      db  = client.db(config.mongodbDatabase);
      return callback( err );
    });
  },

  getDB: function() {
    return db;
  }
};