From 32c3079821b24db7c8e00d00c9f3f106e2294924 Mon Sep 17 00:00:00 2001
From: Thomas Nordquist <thomas.nordquist@viison.com>
Date: Sun, 6 Jan 2019 13:30:35 +0100
Subject: [PATCH] Clean up & Add connection setup

---
 app/package-lock.json                         |  27 +
 app/package.json                              |   2 +
 app/src/App.tsx                               |  10 +-
 .../components/ConnectionSetup/Connection.tsx | 135 ++--
 app/src/components/Sidebar/ValueRenderer.tsx  |   2 +
 app/src/components/Tree/Tree.tsx              |  69 +-
 app/src/components/Tree/TreeNode.tsx          |   6 +-
 app/src/components/Tree/TreeNodeSubnodes.tsx  |   6 +-
 app/tsconfig.json                             |   5 +-
 app/webpack.config.js                         |   2 +
 backend/src/DataSource/DataSource.ts          |   1 +
 backend/src/DataSource/DataSourceState.ts     |   8 +-
 backend/src/DataSource/MqttSource.ts          |  18 +-
 backend/src/Model/TopicProperties.ts          |   4 -
 backend/src/Model/index.ts                    |   1 -
 backend/src/index.ts                          |  70 +-
 backend/tsconfig.json                         |   6 +-
 electron.js                                   |   3 +-
 events/EventBus.ts                            |  55 ++
 events/EventDispatcher.ts                     |  47 ++
 events/Events.ts                              |  39 ++
 events/Server/index.ts                        |   0
 events/index.ts                               |   3 +
 events/test.js                                |   9 +
 package-lock.json                             | 631 ++++++++++++------
 package.json                                  |   6 +-
 26 files changed, 809 insertions(+), 356 deletions(-)
 delete mode 100644 backend/src/Model/TopicProperties.ts
 create mode 100644 events/EventBus.ts
 create mode 100644 events/EventDispatcher.ts
 create mode 100644 events/Events.ts
 create mode 100644 events/Server/index.ts
 create mode 100644 events/index.ts
 create mode 100644 events/test.js

diff --git a/app/package-lock.json b/app/package-lock.json
index 2bf0fc8..e533125 100644
--- a/app/package-lock.json
+++ b/app/package-lock.json
@@ -141,6 +141,14 @@
         "@types/react": "*"
       }
     },
+    "@types/sha1": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/@types/sha1/-/sha1-1.1.1.tgz",
+      "integrity": "sha512-Yrz4TPsm/xaw7c39aTISskNirnRJj2W9OVeHv8ooOR9SG8NHEfh4lwvGeN9euzxDyPfBdFkvL/VHIY3kM45OpQ==",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
     "@types/socket.io-client": {
       "version": "1.4.32",
       "resolved": "https://registry.npmjs.org/@types/socket.io-client/-/socket.io-client-1.4.32.tgz",
@@ -924,6 +932,11 @@
       "resolved": "https://registry.npmjs.org/change-emitter/-/change-emitter-0.1.6.tgz",
       "integrity": "sha1-6LL+PX8at9aaMhma/5HqaTFAlRU="
     },
+    "charenc": {
+      "version": "0.0.2",
+      "resolved": "https://registry.npmjs.org/charenc/-/charenc-0.0.2.tgz",
+      "integrity": "sha1-wKHS86cJLgN3S/qD8UwPxXkKhmc="
+    },
     "chokidar": {
       "version": "2.0.4",
       "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-2.0.4.tgz",
@@ -1210,6 +1223,11 @@
         "which": "^1.2.9"
       }
     },
+    "crypt": {
+      "version": "0.0.2",
+      "resolved": "https://registry.npmjs.org/crypt/-/crypt-0.0.2.tgz",
+      "integrity": "sha1-iNf/fsDfuG9xPch7u0LQRNPmxBs="
+    },
     "crypto-browserify": {
       "version": "3.12.0",
       "resolved": "https://registry.npmjs.org/crypto-browserify/-/crypto-browserify-3.12.0.tgz",
@@ -4475,6 +4493,15 @@
         "safe-buffer": "^5.0.1"
       }
     },
+    "sha1": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/sha1/-/sha1-1.1.1.tgz",
+      "integrity": "sha1-rdqnqTFo85PxnrKxUJFhjicA+Eg=",
+      "requires": {
+        "charenc": ">= 0.0.1",
+        "crypt": ">= 0.0.1"
+      }
+    },
     "shebang-command": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-1.2.0.tgz",
diff --git a/app/package.json b/app/package.json
index 95f840c..7b0fe0a 100644
--- a/app/package.json
+++ b/app/package.json
@@ -18,6 +18,7 @@
     "@types/node": "^10.12.18",
     "@types/react": "^16.7.18",
     "@types/react-dom": "^16.0.11",
+    "@types/sha1": "^1.1.1",
     "@types/socket.io-client": "^1.4.32",
     "@types/vis": "^4.21.9",
     "awesome-typescript-loader": "^5.2.1",
@@ -26,6 +27,7 @@
     "react": "^16.3.2",
     "react-dom": "^16.3.3",
     "react-json-view": "^1.19.1",
+    "sha1": "^1.1.1",
     "socket.io-client": "^2.2.0",
     "source-map-loader": "^0.2.4",
     "typescript": "^3.2.2",
diff --git a/app/src/App.tsx b/app/src/App.tsx
index 16c9d6a..178fd59 100644
--- a/app/src/App.tsx
+++ b/app/src/App.tsx
@@ -5,11 +5,13 @@ import { Tree } from './components/Tree/Tree'
 import TitleBar from './components/TitleBar'
 import Sidebar from './components/Sidebar/Sidebar'
 import Connection from './components/ConnectionSetup/Connection'
+// import { default as EventBus } from '../../events'
 
 import { withTheme, Theme } from '@material-ui/core/styles'
 
-class State {
-  public selectedNode?: q.TreeNode | undefined
+interface State {
+  selectedNode?: q.TreeNode,
+  connectionId?: string
 }
 
 interface Props {
@@ -55,7 +57,7 @@ class App extends React.Component<Props, State> {
       <TitleBar />
       <div>
           <div style={this.getStyles().left}>
-            <Tree didSelectNode={(node: q.TreeNode) => {
+            <Tree connectionId={this.state.connectionId} didSelectNode={(node: q.TreeNode) => {
               this.setState({ selectedNode: node })
             }} />
           </div>
@@ -63,7 +65,7 @@ class App extends React.Component<Props, State> {
             <Sidebar node={this.state.selectedNode} />
           </div>
       </div>
-      <Connection />
+      <Connection onConnection={(connectionId: string) => this.setState({ connectionId })}/>
     </div >
   }
 }
diff --git a/app/src/components/ConnectionSetup/Connection.tsx b/app/src/components/ConnectionSetup/Connection.tsx
index 5bbf9b6..e8cd91e 100644
--- a/app/src/components/ConnectionSetup/Connection.tsx
+++ b/app/src/components/ConnectionSetup/Connection.tsx
@@ -1,12 +1,15 @@
 import * as React from 'react'
-
 import { Typography, Toolbar, Modal, MenuItem, Button, Grid, Paper, TextField, Switch, FormControlLabel } from '@material-ui/core'
 import { withStyles, Theme, StyleRulesCallback } from '@material-ui/core/styles'
+import { MqttOptions, DataSourceState } from '../../../../backend/src/DataSource'
+import { addMqttConnectionEvent, makeConnectionStateEvent, rendererEvents } from '../../../../events'
+import sha1 = require('sha1')
 
 interface Props {
   classes: {[s: string]: string}
   theme: Theme
-  onAbort: () => void
+  onAbort: () => void,
+  onConnection: (connectionId: string) => void
 }
 
 const protocols = [
@@ -16,7 +19,6 @@ const protocols = [
 
 interface State {
   visible: boolean
-  name: string
   host: string
   protocol: string
   port: number
@@ -27,13 +29,22 @@ interface State {
   password: string
 }
 
+declare var window: any
+
 class Connection extends React.Component<Props, State> {
   constructor(props: any) {
     super(props)
-    this.state = {
+    const storedSettingsString = window.localStorage.getItem('connectionSettings')
+    let storedSettings
+    try {
+      storedSettings = storedSettingsString ? JSON.parse(storedSettingsString) : undefined
+    } catch {
+      window.localStorage.setItem('connectionSettings', undefined)
+    }
+
+    const defaultState = {
       visible: true,
-      name: '',
-      host: '',
+      host: 'nodered',
       protocol: protocols[0],
       port: 1883,
       ssl: false,
@@ -42,6 +53,38 @@ class Connection extends React.Component<Props, State> {
       username: '',
       password: '',
     }
+
+    this.state = Object.assign({}, defaultState, storedSettings)
+  }
+
+  private saveConnectionSettings() {
+    window.localStorage.setItem('connectionSettings', JSON.stringify(this.state))
+  }
+
+  private optionsFromState(): MqttOptions {
+    const protocol = this.state.protocol === 'tcp://' ? 'mqtt://' : this.state.protocol
+    const url = `${protocol}${this.state.host}:${this.state.port}`
+
+    return {
+      url,
+      username: this.state.username || undefined,
+      password: this.state.username || undefined,
+      ssl: this.state.ssl,
+      sslValidation: this.state.sslValidation,
+    }
+  }
+
+  private connect() {
+    const options = this.optionsFromState()
+    const connectionId = (sha1(Math.random() + JSON.stringify(options)).slice(0, 8)) as string
+    rendererEvents.emit(addMqttConnectionEvent, { options, id: connectionId })
+    rendererEvents.subscribe(makeConnectionStateEvent(connectionId), (state: DataSourceState) => {
+      console.log(state)
+      if (state.connected) {
+        this.props.onConnection(connectionId)
+        this.setState({ visible: false })
+      }
+    })
   }
 
   public static styles: StyleRulesCallback<string> = (theme: Theme) => {
@@ -91,46 +134,6 @@ class Connection extends React.Component<Props, State> {
           <form className={classes.container} noValidate autoComplete="off">
 
             <Grid container spacing={24}>
-              <Grid item xs={5}>
-                <TextField
-                  label="Name"
-                  className={classes.textField}
-                  value={this.state.name}
-                  onChange={this.handleChange('name')}
-                  margin="normal"
-                />
-              </Grid>
-              <Grid item xs={1}></Grid>
-              <Grid item xs={3}>
-                <div className={classes.switch}>
-                  <FormControlLabel
-                    control={(
-                      <Switch
-                        checked={this.state.sslValidation}
-                        onChange={() => this.setState({ sslValidation: !this.state.sslValidation })}
-                        color="primary"
-                      />
-                    )}
-                    label="Validate certificate"
-                    labelPlacement="bottom"
-                  />
-                </div>
-              </Grid>
-              <Grid item xs={3}>
-                <div className={classes.switch}>
-                  <FormControlLabel
-                    control={(
-                      <Switch
-                        checked={this.state.ssl}
-                        onChange={() => this.setState({ ssl: !this.state.ssl })}
-                        color="primary"
-                      />
-                    )}
-                    label="Encryption"
-                    labelPlacement="bottom"
-                  />
-                </div>
-              </Grid>
               <Grid item xs={2}>
                 <TextField
                   select
@@ -184,19 +187,49 @@ class Connection extends React.Component<Props, State> {
                   margin="normal"
                 />
               </Grid>
-              <Grid item xs={4}></Grid>
+              <Grid item xs={3}>
+                <div className={classes.switch}>
+                  <FormControlLabel
+                    control={(
+                      <Switch
+                        checked={this.state.sslValidation}
+                        onChange={() => this.setState({ sslValidation: !this.state.sslValidation })}
+                        color="primary"
+                      />
+                    )}
+                    label="Validate certificate"
+                    labelPlacement="bottom"
+                  />
+                </div>
+              </Grid>
+              <Grid item xs={3}>
+                <div className={classes.switch}>
+                  <FormControlLabel
+                    control={(
+                      <Switch
+                        checked={this.state.ssl}
+                        onChange={() => this.setState({ ssl: !this.state.ssl })}
+                        color="primary"
+                      />
+                    )}
+                    label="Encryption"
+                    labelPlacement="bottom"
+                  />
+                </div>
+              </Grid>
+              <Grid item xs={6}></Grid>
             </Grid>
             <br />
             <div style={{ textAlign: 'right' }}>
               <Button variant="contained" className={classes.button}>
                 Test Connection
               </Button>
-              <Button variant="contained" color="secondary" className={classes.button} onClick={() => this.setState({ visible: false })}>
-                Cancel
-              </Button>
-              <Button variant="contained" color="primary" className={classes.button}>
+              <Button variant="contained" color="secondary" className={classes.button} onClick={() => this.saveConnectionSettings()}>
                 Save
               </Button>
+              <Button variant="contained" color="primary" className={classes.button} onClick={() => this.connect()}>
+                Connect
+              </Button>
             </div>
           </form>
         </Paper>
diff --git a/app/src/components/Sidebar/ValueRenderer.tsx b/app/src/components/Sidebar/ValueRenderer.tsx
index 59d6a17..425a9ca 100644
--- a/app/src/components/Sidebar/ValueRenderer.tsx
+++ b/app/src/components/Sidebar/ValueRenderer.tsx
@@ -53,6 +53,8 @@ class ValueRenderer extends React.Component<Props, State> {
       return this.renderRawValue(node.message.value)
     } else if (typeof json === 'number') {
       return this.renderRawValue(node.message.value)
+    } else if (typeof json === 'boolean') {
+      return this.renderRawValue(node.message.value)
     } else {
       const theme = this.props.theme.palette.type === 'dark' ? 'monokai' : 'bright:inverted'
       return <ReactJson
diff --git a/app/src/components/Tree/Tree.tsx b/app/src/components/Tree/Tree.tsx
index f1c5dda..b34e837 100644
--- a/app/src/components/Tree/Tree.tsx
+++ b/app/src/components/Tree/Tree.tsx
@@ -1,25 +1,22 @@
 import * as React from 'react'
-import * as io from 'socket.io-client'
 import * as q from '../../../../backend/src/Model'
 import TreeNode from './TreeNode'
 import List from '@material-ui/core/List'
-
-class TreeState {
-  public tree: q.Tree
-  public msg: any
-  constructor(tree: q.Tree, msg: any) {
-    this.tree = tree
-    this.msg = msg
-  }
-}
-
-export interface TreeNodeProps {
-  didSelectNode?: (node: q.TreeNode) => void
-}
+import { makeConnectionMessageEvent, rendererEvents } from '../../../../events'
+import {  } from '../../../../events/Events'
 declare const performance: any
 
-export class Tree extends React.Component<TreeNodeProps, TreeState> {
-  private socket: SocketIOClient.Socket
+interface Props{
+  didSelectNode?: (node: q.TreeNode) => void
+  connectionId?: string
+}
+
+interface TreeState {
+  tree: q.Tree
+  msg: any
+}
+
+export class Tree extends React.Component<Props, TreeState> {
   private renderDuration: number = 300
   private updateTimer?: any
   private lastUpdate: number = 0
@@ -28,8 +25,7 @@ export class Tree extends React.Component<TreeNodeProps, TreeState> {
   constructor(props: any) {
     super(props)
     const tree = new q.Tree()
-    this.state = new TreeState(tree, {})
-    this.socket = io('http://localhost:3000')
+    this.state = { tree, msg: {} }
   }
 
   public time(): number {
@@ -55,18 +51,37 @@ export class Tree extends React.Component<TreeNodeProps, TreeState> {
     }, Math.max(0, timeUntilNextUpdate))
   }
 
-  public componentDidMount() {
-    this.socket.on('message', (msg: any) => {
-      const edges = msg.topic.split('/')
-      const node = q.TreeNodeFactory.fromEdgesAndValue(edges, Buffer.from(msg.payload, 'base64').toString())
-      this.state.tree.updateWithNode(node.firstNode())
+  public componentWillReceiveProps(nextProps: Props) {
+    if (this.props.connectionId) {
+      const event = makeConnectionMessageEvent(this.props.connectionId)
+      rendererEvents.unsubscribeAll(event)
+    }
+    if (nextProps.connectionId) {
+      const event = makeConnectionMessageEvent(nextProps.connectionId)
+      rendererEvents.subscribe(event, this.handleNewData)
+    }
+  }
 
-      this.throttledStateUpdate({ msg, tree: this.state.tree })
-    })
+  public componentDidMount() {
+    if (this.props.connectionId) {
+      const event = makeConnectionMessageEvent(this.props.connectionId)
+      rendererEvents.subscribe(event, this.handleNewData)
+    }
   }
 
   public componentWillUnmount() {
-    this.socket.removeAllListeners()
+    if (this.props.connectionId) {
+      const event = makeConnectionMessageEvent(this.props.connectionId)
+      rendererEvents.unsubscribeAll(event)
+    }
+  }
+
+  private handleNewData = (msg: any) => {
+    const edges = msg.topic.split('/')
+    const node = q.TreeNodeFactory.fromEdgesAndValue(edges, Buffer.from(msg.payload, 'base64').toString())
+    this.state.tree.updateWithNode(node.firstNode())
+
+    this.throttledStateUpdate({ msg, tree: this.state.tree })
   }
 
   public render() {
@@ -74,7 +89,7 @@ export class Tree extends React.Component<TreeNodeProps, TreeState> {
       <List>
         <TreeNode
           animateChages={true}
-          autoExpandLimit={3}
+          autoExpandLimit={0}
           isRoot={true}
           didSelectNode={this.props.didSelectNode}
           treeNode={this.state.tree}
diff --git a/app/src/components/Tree/TreeNode.tsx b/app/src/components/Tree/TreeNode.tsx
index 721b195..5673639 100644
--- a/app/src/components/Tree/TreeNode.tsx
+++ b/app/src/components/Tree/TreeNode.tsx
@@ -1,13 +1,11 @@
 import * as React from 'react'
 import * as q from '../../../../backend/src/Model'
 import { withTheme, Theme } from '@material-ui/core/styles'
-const throttle = require('lodash.throttle')
 import { isElementInViewport } from '../helper/isElementInViewport'
 import TreeNodeTitle from './TreeNodeTitle'
 import TreeNodeSubnodes from './TreeNodeSubnodes'
 
 declare var performance: any
-declare var window: any
 
 export interface TreeNodeProps {
   animateChages: boolean
@@ -37,7 +35,7 @@ class TreeNode extends React.Component<TreeNodeProps, TreeNodeState> {
   private cssAnimationWasSetAt?: number
 
   private willUpdateTime: number = performance.now()
-  private titleRef = React.createRef<HTMLElement>()
+  private titleRef = React.createRef<HTMLDivElement>()
 
   private subnodesDidchange = () => {
     this.dirtySubnodes = true
@@ -139,7 +137,7 @@ class TreeNode extends React.Component<TreeNodeProps, TreeNodeState> {
     this.dirtyState = this.dirtyEdges = this.dirtyMessage = this.dirtySubnodes = false
 
     return <div key={this.props.treeNode.hash()} style={ displayBlock }>
-      <div style={animationStyle} ref={this.titleRef}>
+      <div style={animationStyle} ref={this.titleRef} onClick={() => this.toggle()}>
         <TreeNodeTitle
           edgeCount={this.state.edgeCount}
           collapsed={this.collapsed()}
diff --git a/app/src/components/Tree/TreeNodeSubnodes.tsx b/app/src/components/Tree/TreeNodeSubnodes.tsx
index 24cff56..e540852 100644
--- a/app/src/components/Tree/TreeNodeSubnodes.tsx
+++ b/app/src/components/Tree/TreeNodeSubnodes.tsx
@@ -29,7 +29,11 @@ class TreeNodeSubnodes extends React.Component<Props, {}> {
       const listItems = edges
         .map(edge => edge.target)
         .map(node => (
-          <ListItem key={node.hash()} style={listItemStyle} button>
+          <ListItem
+            key={node.hash()}
+            style={listItemStyle}
+            button
+          >
             <TreeNode
               animateChages={this.props.animateChanges}
               treeNode={node}
diff --git a/app/tsconfig.json b/app/tsconfig.json
index 87e3ace..a3d89b2 100644
--- a/app/tsconfig.json
+++ b/app/tsconfig.json
@@ -4,7 +4,7 @@
     "noImplicitAny": true,
     "strictNullChecks": true,
     "strict": true,
-    "lib": ["es2017"],
+    "lib": ["es2017", "dom"],
     "outDir": "./build/",
     "sourceMap": true,
     "module": "commonjs",
@@ -14,6 +14,9 @@
   "include": [
     "./src/**/*"
   ],
+  "exclude": [
+    "**/*.d.ts"
+  ],
   "awesomeTypescriptLoaderOptions": {
         "useCache": true,
         "transpileModule": true,
diff --git a/app/webpack.config.js b/app/webpack.config.js
index 450109e..00c913d 100644
--- a/app/webpack.config.js
+++ b/app/webpack.config.js
@@ -12,6 +12,8 @@ module.exports = {
       splitChunks: false,
     },
 
+    target: 'electron-renderer',
+
     mode: 'production',
 
     // Enable sourcemaps for debugging webpack's output.
diff --git a/backend/src/DataSource/DataSource.ts b/backend/src/DataSource/DataSource.ts
index 1dd9ecb..b1a7711 100644
--- a/backend/src/DataSource/DataSource.ts
+++ b/backend/src/DataSource/DataSource.ts
@@ -8,6 +8,7 @@ interface DataSource<DataSourceOptions> {
   disconnect(): void
   onMessage(messageCallback: MessageCallback): void
   topicSeparator: string
+  stateMachine: DataSourceStateMachine
 }
 
 export { DataSource, MessageCallback }
diff --git a/backend/src/DataSource/DataSourceState.ts b/backend/src/DataSource/DataSourceState.ts
index a6a952f..26535b3 100644
--- a/backend/src/DataSource/DataSourceState.ts
+++ b/backend/src/DataSource/DataSourceState.ts
@@ -1,4 +1,4 @@
-import { EventEmitter } from 'events'
+import { EventDispatcher } from '../../../events'
 
 export interface DataSourceState {
   connecting: boolean
@@ -6,7 +6,8 @@ export interface DataSourceState {
   error?: Error
 }
 
-export class DataSourceStateMachine extends EventEmitter {
+export class DataSourceStateMachine {
+  public onUpdate = new EventDispatcher<DataSourceState, DataSourceStateMachine>(this)
   private state: DataSourceState = {
     error: undefined,
     connected: false,
@@ -19,6 +20,7 @@ export class DataSourceStateMachine extends EventEmitter {
       error: undefined,
       connecting: false,
     }
+    this.onUpdate.dispatch(this.state)
   }
 
   public setError(error: Error) {
@@ -27,6 +29,7 @@ export class DataSourceStateMachine extends EventEmitter {
       connected: false,
       connecting: false,
     }
+    this.onUpdate.dispatch(this.state)
   }
 
   public setConnecting() {
@@ -35,6 +38,7 @@ export class DataSourceStateMachine extends EventEmitter {
       connected: false,
       connecting: true,
     }
+    this.onUpdate.dispatch(this.state)
   }
 
   public toJSON() {
diff --git a/backend/src/DataSource/MqttSource.ts b/backend/src/DataSource/MqttSource.ts
index 407b115..9b4360d 100644
--- a/backend/src/DataSource/MqttSource.ts
+++ b/backend/src/DataSource/MqttSource.ts
@@ -3,9 +3,14 @@ import { DataSource, DataSourceStateMachine } from './'
 
 export interface MqttOptions {
   url: string
+  username?: string
+  password?: string
+  ssl: boolean
+  sslValidation: boolean
 }
 
 export class MqttSource implements DataSource<MqttOptions> {
+  public stateMachine: DataSourceStateMachine = new DataSourceStateMachine()
   private client: Client | undefined
   private messageCallback?: (topic: string, message: Buffer) => void
   private rootSubscription = '#'
@@ -16,8 +21,7 @@ export class MqttSource implements DataSource<MqttOptions> {
   }
 
   public connect(options: MqttOptions): DataSourceStateMachine {
-    const state = new DataSourceStateMachine()
-
+    this.stateMachine.setConnecting()
     const client = mqttConnect(options.url, {
       resubscribe: false,
     })
@@ -25,19 +29,19 @@ export class MqttSource implements DataSource<MqttOptions> {
     this.client = client
 
     client.on('error', (error: Error) => {
-      state.setError(error)
+      this.stateMachine.setError(error)
     })
 
     client.on('close', () => {
-      state.setConnected(false)
+      this.stateMachine.setConnected(false)
     })
 
     client.on('reconnect', () => {
-      state.setConnecting()
+      this.stateMachine.setConnecting()
     })
 
     client.on('connect', () => {
-      state.setConnected(true)
+      this.stateMachine.setConnected(true)
       client.subscribe(this.rootSubscription, (err: Error) => {
         if (err) {
           throw new Error('mqtt subscription failed')
@@ -49,7 +53,7 @@ export class MqttSource implements DataSource<MqttOptions> {
       this.messageCallback && this.messageCallback(topic, message)
     })
 
-    return state
+    return this.stateMachine
   }
 
   public disconnect() {
diff --git a/backend/src/Model/TopicProperties.ts b/backend/src/Model/TopicProperties.ts
deleted file mode 100644
index d5b04da..0000000
--- a/backend/src/Model/TopicProperties.ts
+++ /dev/null
@@ -1,4 +0,0 @@
-export class TopicProperties {
-  public topicSeparator: string = '/'
-  public multilevelWildcard: string | null = '#'
-}
diff --git a/backend/src/Model/index.ts b/backend/src/Model/index.ts
index 0b6a0d3..049c5e6 100644
--- a/backend/src/Model/index.ts
+++ b/backend/src/Model/index.ts
@@ -3,5 +3,4 @@ export { TreeNode, TreeNodeUpdateEvents } from './TreeNode'
 export { Message } from './Message'
 export { TreeNodeFactory } from './TreeNodeFactory'
 export { Tree } from './Tree'
-export { TopicProperties } from './TopicProperties'
 export { Hashable } from './Hashable'
diff --git a/backend/src/index.ts b/backend/src/index.ts
index c3fded2..1f6509b 100644
--- a/backend/src/index.ts
+++ b/backend/src/index.ts
@@ -1,34 +1,46 @@
-import * as socketIO from 'socket.io'
-const http = require('http')
-
-import { TopicProperties, Tree, TreeNodeFactory } from './Model'
+import { addMqttConnectionEvent, backendEvents, makeConnectionStateEvent, makeConnectionMessageEvent, AddMqttConnection } from '../../events'
 import { MqttSource, DataSource } from './DataSource'
 
-const options = { url: 'mqtt://nodered' }
-const dataSource = new MqttSource()
+class ConnectionManager {
+  private connections: {[s: string]: DataSource<any>} = {}
 
-const a: any[] = []
-
-const server = http.createServer()
-const io = socketIO(server)
-io.on('connection', (client) => {
-  console.log('connection')
-  a.forEach((b) => {
-    io.emit('message', b)
-  })
-  client.on('disconnect', () => { /* … */ })
-})
-server.listen(3000)
-
-const state = dataSource.connect(options)
-dataSource.onMessage((topic: string, payload: Buffer) => {
-  let buffer = payload
-  if (a.length < 30) {
-    a.push({ topic, payload: buffer.toString('base64') })
-  }
-  if (buffer.length > 10000) {
-    buffer = buffer.slice(0, 10000)
+  public manageConnections() {
+    backendEvents.subscribe(addMqttConnectionEvent, this.handleConnectionRequest)
   }
 
-  io.emit('message', { topic, payload: buffer.toString('base64') })
-})
+  private handleConnectionRequest = (event: AddMqttConnection) => {
+    console.log(event)
+    const connectionId = event.id
+    const options = event.options
+    const connection = new MqttSource()
+    this.connections[connectionId] = connection
+
+    connection.stateMachine.onUpdate.subscribe((state) => {
+      backendEvents.emit(makeConnectionStateEvent(connectionId), state)
+    })
+
+    connection.connect(options)
+    this.handleNewMessagesForConnection(connectionId, connection)
+  }
+
+  private handleNewMessagesForConnection(connectionId: string, connection: MqttSource) {
+    const messageEvent = makeConnectionMessageEvent(connectionId)
+    connection.onMessage((topic: string, payload: Buffer) => {
+      let buffer = payload
+      if (buffer.length > 10000) {
+        buffer = buffer.slice(0, 10000)
+      }
+      backendEvents.emit(messageEvent, { topic, payload: buffer.toString('base64') })
+    })
+  }
+
+  public removeConnection(hash: string) {
+    const connection = this.connections[hash]
+    connection.stateMachine
+    connection.disconnect()
+    delete this.connections[hash]
+  }
+}
+
+const connectionManager = new ConnectionManager()
+connectionManager.manageConnections()
diff --git a/backend/tsconfig.json b/backend/tsconfig.json
index 695a9d5..a173342 100644
--- a/backend/tsconfig.json
+++ b/backend/tsconfig.json
@@ -5,7 +5,7 @@
     "strictNullChecks": true,
     "outDir": "./build",
     "strict": true,
-    "lib": ["es2017"],
+    "lib": ["es2017", "dom"],
     "sourceMap": true
   },
   "includes": [
@@ -14,6 +14,8 @@
   "exclude": [
     "app",
     "node_modules",
-    "src/**/*.spec.ts"
+    "src/**/*.spec.ts",
+    "**/*.d.ts",
+    "typings"
   ]
 }
diff --git a/electron.js b/electron.js
index e1a4d18..ad95a6d 100644
--- a/electron.js
+++ b/electron.js
@@ -1,6 +1,6 @@
 // Modules to control application life and create native browser window
 const {app, BrowserWindow} = require('electron')
-require('mqtt-explorer-backend')
+require('./backend/build/backend/src/index.js')
 // Keep a global reference of the window object, if you don't, the window will
 // be closed automatically when the JavaScript object is garbage collected.
 let mainWindow
@@ -27,6 +27,7 @@ function createWindow () {
     // in an array if your app supports multi windows, this is the time
     // when you should delete the corresponding element.
     mainWindow = null
+    app.quit()
   })
 }
 
diff --git a/events/EventBus.ts b/events/EventBus.ts
new file mode 100644
index 0000000..c6cf1c2
--- /dev/null
+++ b/events/EventBus.ts
@@ -0,0 +1,55 @@
+import { Event } from './Events'
+import { ipcMain, ipcRenderer, IpcRenderer, IpcMain } from 'electron'
+
+interface EventBusInterface {
+  subscribe<MessageType>(event: Event<MessageType>, callback:(msg: MessageType) => void): void
+  unsubscribeAll<MessageType>(event: Event<MessageType>): void
+  emit<MessageType>(event: Event<MessageType>, msg: MessageType): void
+}
+
+class IpcMainEventBus implements EventBusInterface {
+  private ipc: IpcMain
+  private client: any
+  constructor(ipc: IpcMain) {
+    this.ipc = ipc
+  }
+
+  public subscribe<MessageType>(event: Event<MessageType>, callback:(msg: MessageType) => void) {
+    console.log('subscribing', event.topic)
+    this.ipc.on(event.topic, (event: any, arg: any) => {
+      this.client = event.sender
+      callback(arg)
+    })
+  }
+
+  public unsubscribeAll<MessageType>(event: Event<MessageType>) {
+    this.ipc.removeAllListeners(event.topic)
+  }
+
+  public emit<MessageType>(event: Event<MessageType>, msg: MessageType) {
+    this.client.send(event.topic, msg)
+  }
+}
+
+class IpcRendererEventBus implements EventBusInterface {
+  private ipc: IpcRenderer
+  constructor(ipc: IpcRenderer) {
+    this.ipc = ipc
+  }
+
+  public subscribe<MessageType>(event: Event<MessageType>, callback:(msg: MessageType) => void) {
+    this.ipc.on(event.topic, (_event: any, arg: any) => callback(arg))
+  }
+
+  public unsubscribeAll<MessageType>(event: Event<MessageType>) {
+    this.ipc.removeAllListeners(event.topic)
+  }
+
+  public emit<MessageType>(event: Event<MessageType>, msg: MessageType) {
+    console.log(event.topic, msg)
+    this.ipc.send(event.topic, msg)
+  }
+}
+
+export const rendererEvents = new IpcRendererEventBus(ipcRenderer)
+export const backendEvents = new IpcMainEventBus(ipcMain)
diff --git a/events/EventDispatcher.ts b/events/EventDispatcher.ts
new file mode 100644
index 0000000..ab94646
--- /dev/null
+++ b/events/EventDispatcher.ts
@@ -0,0 +1,47 @@
+import { EventEmitter } from 'events'
+
+interface CallbackStore {
+  wrappedCallback: any
+  callback: any
+}
+
+export class EventDispatcher<Message, Dispatcher> {
+  private emitter = new EventEmitter()
+  private dispatcher: Dispatcher
+  private callbacks: CallbackStore[] = []
+
+  constructor(dispatcher: Dispatcher) {
+    this.dispatcher = dispatcher
+  }
+
+  public dispatch(msg: Message) {
+    this.emitter.emit('event', msg)
+  }
+
+  public subscribe(callback: (msg: Message, dispatcher: Dispatcher) => void) {
+    const wrappedCallback = (msg: Message) => {
+      callback(msg, this.dispatcher)
+    }
+    this.emitter.on('event', wrappedCallback)
+
+    this.callbacks.push({
+      callback,
+      wrappedCallback,
+    })
+  }
+
+  public unsubscribe(callback: (msg: Message, dispatcher: Dispatcher) => void) {
+    const item = this.callbacks.find(store => store.callback === callback)
+    if (!item) {
+      return
+    }
+
+    this.emitter.removeListener('event', item.wrappedCallback)
+    this.callbacks = this.callbacks.filter(a => a !== item)
+  }
+
+  public removeAllListeners() {
+    this.emitter.removeAllListeners()
+    this.callbacks = []
+  }
+}
diff --git a/events/Events.ts b/events/Events.ts
new file mode 100644
index 0000000..14d1fb7
--- /dev/null
+++ b/events/Events.ts
@@ -0,0 +1,39 @@
+import { MqttOptions, DataSourceState } from '../backend/src/DataSource'
+
+export interface Event<MessageType> {
+  topic: string
+}
+
+export interface AddMqttConnection {
+  id: string,
+  options: MqttOptions
+}
+
+export const addMqttConnectionEvent: Event<AddMqttConnection> = {
+  topic: 'connection/add/mqtt',
+}
+
+interface RemoveConnection {
+  connectionId: string,
+}
+
+export const removeConnection: Event<string> = {
+  topic: 'connection/remove',
+}
+
+export function makeConnectionStateEvent(connectionId: string): Event<DataSourceState> {
+  return {
+    topic: `conn/state/${connectionId}`,
+  }
+}
+
+interface Message {
+  topic: string,
+  payload: any
+}
+
+export function makeConnectionMessageEvent(connectionId: string): Event<Message> {
+  return {
+    topic: `conn/${connectionId}`,
+  }
+}
diff --git a/events/Server/index.ts b/events/Server/index.ts
new file mode 100644
index 0000000..e69de29
diff --git a/events/index.ts b/events/index.ts
new file mode 100644
index 0000000..b1e05e1
--- /dev/null
+++ b/events/index.ts
@@ -0,0 +1,3 @@
+export * from './Events'
+export * from './EventDispatcher'
+export * from './EventBus'
diff --git a/events/test.js b/events/test.js
new file mode 100644
index 0000000..40acee8
--- /dev/null
+++ b/events/test.js
@@ -0,0 +1,9 @@
+const { EventEmitter } = require('events');
+
+const a = new EventEmitter()
+a.on('test', () => console.log('test'))
+a.on('test2', () => console.log('test2'))
+a.removeAllListeners('test')
+
+a.emit('test')
+a.emit('test2')
diff --git a/package-lock.json b/package-lock.json
index 81ecb24..6991a10 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -50,17 +50,45 @@
         "tslib": "^1.8.1"
       }
     },
+    "@types/electron": {
+      "version": "1.6.10",
+      "resolved": "https://registry.npmjs.org/@types/electron/-/electron-1.6.10.tgz",
+      "integrity": "sha512-MOCVyzIwkBEloreoCVrTV108vSf8fFIJPsGruLCoAoBZdxtnJUqKA4lNonf/2u1twSjAspPEfmEheC+TLm/cMw==",
+      "requires": {
+        "electron": "*"
+      }
+    },
     "@types/node": {
       "version": "8.10.39",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-8.10.39.tgz",
-      "integrity": "sha512-rE7fktr02J8ybFf6eysife+WF+L4sAHWzw09DgdCebEu+qDwMvv4zl6Bc+825ttGZP73kCKxa3dhJOoGJ8+5mA==",
-      "dev": true
+      "integrity": "sha512-rE7fktr02J8ybFf6eysife+WF+L4sAHWzw09DgdCebEu+qDwMvv4zl6Bc+825ttGZP73kCKxa3dhJOoGJ8+5mA=="
+    },
+    "@types/socket.io": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/@types/socket.io/-/socket.io-2.1.2.tgz",
+      "integrity": "sha512-Ind+4qMNfQ62llyB4IMs1D8znMEBsMKohZBPqfBUIXqLQ9bdtWIbNTBWwtdcBWJKnokMZGcmWOOKslatni5vtA==",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
+    "accepts": {
+      "version": "1.3.5",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.5.tgz",
+      "integrity": "sha1-63d99gEXI6OxTopywIBcjoZ0a9I=",
+      "requires": {
+        "mime-types": "~2.1.18",
+        "negotiator": "0.6.1"
+      }
+    },
+    "after": {
+      "version": "0.8.2",
+      "resolved": "https://registry.npmjs.org/after/-/after-0.8.2.tgz",
+      "integrity": "sha1-/ts5T58OAqqXaOcCvaI7UF+ufh8="
     },
     "ajv": {
       "version": "6.6.2",
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.6.2.tgz",
       "integrity": "sha512-FBHEW6Jf5TB9MGBgUUA9XHkTbjXYfAUjY43ACMfmdMRHniyoMHjHjzD50OK8LGDWQwp4rWEsIq5kEqq7rvIM1g==",
-      "dev": true,
       "requires": {
         "fast-deep-equal": "^2.0.1",
         "fast-json-stable-stringify": "^2.0.0",
@@ -119,8 +147,7 @@
     "ansi-regex": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
-      "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
-      "dev": true
+      "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8="
     },
     "ansi-styles": {
       "version": "3.2.1",
@@ -192,8 +219,12 @@
     "array-find-index": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/array-find-index/-/array-find-index-1.0.2.tgz",
-      "integrity": "sha1-3wEKoSh+Fku9pvlyOwqWoexBh6E=",
-      "dev": true
+      "integrity": "sha1-3wEKoSh+Fku9pvlyOwqWoexBh6E="
+    },
+    "arraybuffer.slice": {
+      "version": "0.0.7",
+      "resolved": "https://registry.npmjs.org/arraybuffer.slice/-/arraybuffer.slice-0.0.7.tgz",
+      "integrity": "sha512-wGUIVQXuehL5TCqQun8OW81jGzAWycqzFF8lFp+GOM5BXLYj3bKNsYC4daB7n6XjCqxQA/qgTJ+8ANR3acjrog=="
     },
     "arrify": {
       "version": "1.0.1",
@@ -205,7 +236,6 @@
       "version": "0.2.4",
       "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.4.tgz",
       "integrity": "sha512-jxwzQpLQjSmWXgwaCZE9Nz+glAG01yF1QnWgbhGwHI5A6FRIEY6IVqtHhIepHqI7/kyEyQEagBC5mBEFlIYvdg==",
-      "dev": true,
       "requires": {
         "safer-buffer": "~2.1.0"
       }
@@ -213,8 +243,7 @@
     "assert-plus": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
-      "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU=",
-      "dev": true
+      "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU="
     },
     "async-exit-hook": {
       "version": "2.0.1",
@@ -222,23 +251,25 @@
       "integrity": "sha512-NW2cX8m1Q7KPA7a5M2ULQeZ2wR5qI5PAbw5L0UOMxdioVk9PMZ0h1TmyZEkPYrCvYjDlFICusOu1dlEKAAeXBw==",
       "dev": true
     },
+    "async-limiter": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.0.tgz",
+      "integrity": "sha512-jp/uFnooOiO+L211eZOoSyzpOITMXx1rBITauYykG3BRYPu8h0UcxsPNB04RR5vo4Tyz3+ay17tR6JVf9qzYWg=="
+    },
     "asynckit": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
-      "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k=",
-      "dev": true
+      "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k="
     },
     "aws-sign2": {
       "version": "0.7.0",
       "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.7.0.tgz",
-      "integrity": "sha1-tG6JCTSpWR8tL2+G1+ap8bP+dqg=",
-      "dev": true
+      "integrity": "sha1-tG6JCTSpWR8tL2+G1+ap8bP+dqg="
     },
     "aws4": {
       "version": "1.8.0",
       "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.8.0.tgz",
-      "integrity": "sha512-ReZxvNHIOv88FlT7rxcXIIC0fPt4KZqZbOlivyWtXLt8ESx84zd3kMC6iK5jVeS2qt+g7ftS7ye4fi06X5rtRQ==",
-      "dev": true
+      "integrity": "sha512-ReZxvNHIOv88FlT7rxcXIIC0fPt4KZqZbOlivyWtXLt8ESx84zd3kMC6iK5jVeS2qt+g7ftS7ye4fi06X5rtRQ=="
     },
     "babel-code-frame": {
       "version": "6.26.0",
@@ -278,27 +309,54 @@
         }
       }
     },
+    "backo2": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/backo2/-/backo2-1.0.2.tgz",
+      "integrity": "sha1-MasayLEpNjRj41s+u2n038+6eUc="
+    },
     "balanced-match": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
       "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
       "dev": true
     },
+    "base64-arraybuffer": {
+      "version": "0.1.5",
+      "resolved": "https://registry.npmjs.org/base64-arraybuffer/-/base64-arraybuffer-0.1.5.tgz",
+      "integrity": "sha1-c5JncZI7Whl0etZmqlzUv5xunOg="
+    },
     "base64-js": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.3.0.tgz",
       "integrity": "sha512-ccav/yGvoa80BQDljCxsmmQ3Xvx60/UpBIij5QN21W3wBi/hhIC9OoO+KLpu9IJTS9j4DRVJ3aDDF9cMSoa2lw==",
       "dev": true
     },
+    "base64id": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/base64id/-/base64id-1.0.0.tgz",
+      "integrity": "sha1-R2iMuZu2gE8OBtPnY7HDLlfY5rY="
+    },
     "bcrypt-pbkdf": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.2.tgz",
       "integrity": "sha1-pDAdOJtqQ/m2f/PKEaP2Y342Dp4=",
-      "dev": true,
       "requires": {
         "tweetnacl": "^0.14.3"
       }
     },
+    "better-assert": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/better-assert/-/better-assert-1.0.2.tgz",
+      "integrity": "sha1-QIZrnhueC1W0gYlDEeaPr/rrxSI=",
+      "requires": {
+        "callsite": "1.0.0"
+      }
+    },
+    "blob": {
+      "version": "0.0.5",
+      "resolved": "https://registry.npmjs.org/blob/-/blob-0.0.5.tgz",
+      "integrity": "sha512-gaqbzQPqOoamawKg0LGVd7SzLgXS+JH61oWprSLH+P+abTczqJbhTR8CmJ2u9/bUYNmHTGJx/UEmn6doAvvuig=="
+    },
     "bluebird": {
       "version": "3.5.3",
       "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.3.tgz",
@@ -403,8 +461,7 @@
     "buffer-from": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.1.1.tgz",
-      "integrity": "sha512-MQcXEUbCKtEo7bhqEs6560Hyd4XaovZlO/k9V3hjVUF/zwW7KBVdSK4gIt/bzwS9MbR5qob+F5jusZsb0YQK2A==",
-      "dev": true
+      "integrity": "sha512-MQcXEUbCKtEo7bhqEs6560Hyd4XaovZlO/k9V3hjVUF/zwW7KBVdSK4gIt/bzwS9MbR5qob+F5jusZsb0YQK2A=="
     },
     "builder-util": {
       "version": "9.6.1",
@@ -463,20 +520,22 @@
     "builtin-modules": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/builtin-modules/-/builtin-modules-1.1.1.tgz",
-      "integrity": "sha1-Jw8HbFpywC9bZaR9+Uxf46J4iS8=",
-      "dev": true
+      "integrity": "sha1-Jw8HbFpywC9bZaR9+Uxf46J4iS8="
+    },
+    "callsite": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/callsite/-/callsite-1.0.0.tgz",
+      "integrity": "sha1-KAOY5dZkvXQDi28JBRU+borxvCA="
     },
     "camelcase": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-2.1.1.tgz",
-      "integrity": "sha1-fB0W1nmhu+WcoCys7PsBHiAfWh8=",
-      "dev": true
+      "integrity": "sha1-fB0W1nmhu+WcoCys7PsBHiAfWh8="
     },
     "camelcase-keys": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/camelcase-keys/-/camelcase-keys-2.1.0.tgz",
       "integrity": "sha1-MIvur/3ygRkFHvodkyITyRuPkuc=",
-      "dev": true,
       "requires": {
         "camelcase": "^2.0.0",
         "map-obj": "^1.0.0"
@@ -491,8 +550,7 @@
     "caseless": {
       "version": "0.12.0",
       "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.12.0.tgz",
-      "integrity": "sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw=",
-      "dev": true
+      "integrity": "sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw="
     },
     "chalk": {
       "version": "2.4.1",
@@ -570,8 +628,7 @@
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       "resolved": "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz",
-      "integrity": "sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=",
-      "dev": true
+      "integrity": "sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c="
     },
     "typescript": {
       "version": "3.2.2",
@@ -7891,8 +8070,7 @@
     "universalify": {
       "version": "0.1.2",
       "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.1.2.tgz",
-      "integrity": "sha512-rBJeI5CXAlmy1pV+617WB9J63U6XcazHHF2f2dbJix4XzpUF0RS3Zbj0FGIOCAva5P/d/GBOYaACQ1w+0azUkg==",
-      "dev": true
+      "integrity": "sha512-rBJeI5CXAlmy1pV+617WB9J63U6XcazHHF2f2dbJix4XzpUF0RS3Zbj0FGIOCAva5P/d/GBOYaACQ1w+0azUkg=="
     },
     "unzip-response": {
       "version": "2.0.1",
@@ -7939,7 +8117,6 @@
       "version": "4.2.2",
       "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.2.2.tgz",
       "integrity": "sha512-KY9Frmirql91X2Qgjry0Wd4Y+YTdrdZheS8TFwvkbLWf/G5KNJDCh6pKL5OZctEW4+0Baa5idK2ZQuELRwPznQ==",
-      "dev": true,
       "requires": {
         "punycode": "^2.1.0"
       }
@@ -7962,20 +8139,17 @@
     "util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
-      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
-      "dev": true
+      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
     },
     "uuid": {
       "version": "3.3.2",
       "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.2.tgz",
-      "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA==",
-      "dev": true
+      "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA=="
     },
     "validate-npm-package-license": {
       "version": "3.0.4",
       "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.4.tgz",
       "integrity": "sha512-DpKm2Ui/xN7/HQKCtpZxoRWBhZ9Z0kqtygG8XCgNQ8ZlDnxuQmWhj566j8fN4Cu3/JmbhsDo7fcAJq4s9h27Ew==",
-      "dev": true,
       "requires": {
         "spdx-correct": "^3.0.0",
         "spdx-expression-parse": "^3.0.0"
@@ -7985,7 +8159,6 @@
       "version": "1.10.0",
       "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
       "integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
-      "dev": true,
       "requires": {
         "assert-plus": "^1.0.0",
         "core-util-is": "1.0.2",
@@ -8076,6 +8249,14 @@
         "signal-exit": "^3.0.2"
       }
     },
+    "ws": {
+      "version": "6.1.2",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-6.1.2.tgz",
+      "integrity": "sha512-rfUqzvz0WxmSXtJpPMX2EeASXabOrSMk1ruMOV3JBTBjo4ac2lDjGGsbQSyxj8Odhw5fBib8ZKEjDNvgouNKYw==",
+      "requires": {
+        "async-limiter": "~1.0.0"
+      }
+    },
     "xdg-basedir": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/xdg-basedir/-/xdg-basedir-3.0.0.tgz",
@@ -8094,11 +8275,15 @@
       "integrity": "sha1-1QH5ezvbQDr4757MIFcxh6rawOk=",
       "dev": true
     },
+    "xmlhttprequest-ssl": {
+      "version": "1.5.5",
+      "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.5.tgz",
+      "integrity": "sha1-wodrBhaKrcQOV9l+gRkayPQ5iz4="
+    },
     "xtend": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/xtend/-/xtend-2.1.2.tgz",
       "integrity": "sha1-bv7MKk2tjmlixJAbM3znuoe10os=",
-      "dev": true,
       "requires": {
         "object-keys": "~0.4.0"
       }
@@ -8233,11 +8418,15 @@
       "version": "2.4.1",
       "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.4.1.tgz",
       "integrity": "sha1-lSj0QtqxsihOWLQ3m7GU4i4MQAU=",
-      "dev": true,
       "requires": {
         "fd-slicer": "~1.0.1"
       }
     },
+    "yeast": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/yeast/-/yeast-0.1.2.tgz",
+      "integrity": "sha1-AI4G2AlDIMNy28L47XagymyKxBk="
+    },
     "yn": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/yn/-/yn-2.0.0.tgz",
diff --git a/package.json b/package.json
index 79a59e3..52234c4 100644
--- a/package.json
+++ b/package.json
@@ -6,6 +6,7 @@
   "scripts": {
     "start": "electron .",
     "test": "npm run test-backend",
+    "build": "cd app; npm run build; cd ..; cd backend; npm run build; cd ..",
     "test-backend": "cd backend && npm run test && cd ..",
     "release": "npm run test && ./release.sh"
   },
@@ -38,6 +39,9 @@
     "typescript": "^3.2.2"
   },
   "dependencies": {
-    "mqtt-explorer-backend": "file:backend"
+    "@types/electron": "^1.6.10",
+    "@types/socket.io": "^2.1.2",
+    "mqtt-explorer-backend": "file:backend",
+    "socket.io": "^2.2.0"
   }
 }