Remove deprecation warnings after mongoose update (#481)

Author: starwarfan

source/data_access/index.js

@@ -14,9 +14,10 @@ var cipher = require('../cipher');
 
 // Connect to MongoDB
 var connectOption = {
-  useMongoClient: true,
-  reconnectTries: 60 * 15,
-  reconnectInterval: 1000
+  useNewUrlParser: true,
+  useUnifiedTopology: true,
+  useCreateIndex: true,
+  useFindAndModify: false,
 };
 
 var mongoose = require('mongoose');

source/data_access/interface/roomInterface.js

@@ -167,7 +167,7 @@ exports.get = function (serviceId, roomId, callback) {
  * Delete Room. Removes a determined room from the data base.
  */
 exports.delete = function (serviceId, roomId, callback) {
-  Room.remove({_id: roomId}, function(err0) {
+  Room.deleteOne({_id: roomId}, function(err0) {
     Service.findByIdAndUpdate(serviceId, { '$pull' : { 'rooms' : roomId } },
       function (err1, service) {
         if (err1) console.log('Pull rooms fail:', err1.message);

source/data_access/interface/serviceInterface.js

@@ -37,7 +37,7 @@ exports.get = function (serviceId, callback) {
  * Delete Service.
  */
 exports.delete = function (serviceId, callback) {
-  Service.remove({_id: serviceId}, function(err, ret) {
+  Service.deleteOne({_id: serviceId}, function(err, ret) {
     if (ret.n === 0) serviceId = null;
     callback(err, serviceId);
   });