// npm install mongodb
// node json_dump.js

var fs = require('fs');
var mongo   = require('mongodb').MongoClient;
var ObjectID = require('mongodb').ObjectID

var config = {
	user: "",
	password: "",
	host: "",
	port: ,
	name: ""
}

var filename = 'dump'

mongo.connect('mongodb://' + config.user + ':' + config.password + '@' + config.host + ':' + config.port + '/' + config.name, function(err, db) {
	if (err) throw new Error(err);
	if (!err && db) console.log('Opened connection to ' + config.name);

	function find(collection, query, cb) {
		db.collection(collection).find(query).toArray(cb)
	}

  var collection = '';
	var query = {};

	return find(collection, query, function(err, documents) {
		var export_docs = JSON.stringify(documents, null, 2) + '\n';
		fs.writeFileSync('./' + filename + '.json', export_docs);
		console.log('Finished writing ' filename + '.json');
		db.close();
		console.log('Closed connection to ' + config.name);
	});
});