Use nodejs-mobile and bcrypt to generate encryption key, and encrypt db

components/app.js

@@ -1,5 +1,6 @@
 import React, { Component } from 'react'
 import { View, BackHandler } from 'react-native'
+import nodejs from 'nodejs-mobile-react-native'
 import Header from './header'
 import Menu from './menu'
 import Home from './home'
@@ -11,6 +12,7 @@ import Settings from './settings'
 import Stats from './stats'
 import {headerTitles as titles} from './labels'
 import setupNotifications from '../lib/notifications'
+import { encrypt } from '../db'
 
 const isSymptomView = name => Object.keys(symptomViews).indexOf(name) > -1
 
@@ -22,6 +24,15 @@ export default class App extends Component {
     }
     this.backHandler = BackHandler.addEventListener('hardwareBackPress', this.handleBackButtonPress)
     setupNotifications(this.navigate)
+    nodejs.start('main.js')
+    nodejs.channel.addListener(
+      'message',
+      msg => {
+        msg = JSON.parse(msg)
+        encrypt(msg.message)
+      },
+      this
+    )
   }
 
   componentWillUnmount() {