i399exmongo/mongo.js

'use strict';

const mongodb = require('mongodb');
const Dao = require('./dao.js');
const ObjectID = mongodb.ObjectID;

var url = 'mongodb://i399:salakala@ds137191.mlab.com:37191/i399';

var data = { name: 'John' };

//findById("591418e3930698683597d4f8").then(data => console.log(data))

var dao = new Dao();

dao.connect(url)
   .then(() => {
       return dao.findById('591418e3930698683597d4f8')
   }).then(data => {
       dao.close();
       console.log(data);
   }).catch(error => {
       dao.close();
       console.log('Error: ' + error)
   });

function inset(data) {
    var database;
    mongodb.MongoClient.connect(url).then(db => {
        database = db;
        return db.collection('contacts').insertOne(data);
    }).then(() => {
        closeDb(database)
    }).catch(error => {
        closeDb(database);
        throw error;
    });
}

function findAll() {
    var database;
    return mongodb.MongoClient.connect(url).then(db => {
        database = db;
        return db.collection('contacts').find().toArray();
    }).then(data => {
        closeDb(database)
        return data;
    }).catch(error => {
        closeDb(database);
        throw error;
    });
}


function findById(id) {
    var database;
    return mongodb.MongoClient.connect(url).then(db => {
        database = db;
        id = new ObjectID(id)
        return db.collection('contacts').findOne({ _id: id});
    }).then(data => {
        closeDb(database)
        return data;
    }).catch(error => {
        closeDb(database);
        throw error;
    });
}

function closeDb(database) {
    if (database) {
        database.close();
    }
}