metamask controller - adopt setup*Communication from background

app/scripts/background.js

@@ -1,6 +1,5 @@
 const urlUtil = require('url')
-const Dnode = require('dnode')
-const eos = require('end-of-stream')
+const endOfStream = require('end-of-stream')
 const asyncQ = require('async-q')
 const pipe = require('pump')
 const LocalStorageStore = require('obs-store/lib/localStorage')
@@ -10,7 +9,6 @@ const migrations = require('./migrations/')
 const PortStream = require('./lib/port-stream.js')
 const notification = require('./lib/notifications.js')
 const messageManager = require('./lib/message-manager')
-const setupMultiplex = require('./lib/stream-utils.js').setupMultiplex
 const MetamaskController = require('./metamask-controller')
 const extension = require('./lib/extension')
 const firstTimeState = require('./first-time-state')
@@ -93,51 +91,21 @@ function setupController (initState) {
     var portStream = new PortStream(remotePort)
     if (isMetaMaskInternalProcess) {
       // communication with popup
-      popupIsOpen = remotePort.name === 'popup'
-      setupTrustedCommunication(portStream, 'MetaMask', remotePort.name)
+      popupIsOpen = popupIsOpen || (remotePort.name === 'popup')
+      controller.setupTrustedCommunication(portStream, 'MetaMask', remotePort.name)
+      // record popup as closed
+      if (remotePort.name === 'popup') {
+        endOfStream(portStream, () => {
+          popupIsOpen = false
+        })
+      }
     } else {
       // communication with page
       var originDomain = urlUtil.parse(remotePort.sender.url).hostname
-      setupUntrustedCommunication(portStream, originDomain)
+      controller.setupUntrustedCommunication(portStream, originDomain)
     }
   }
 
-  function setupUntrustedCommunication (connectionStream, originDomain) {
-    // setup multiplexing
-    var mx = setupMultiplex(connectionStream)
-    // connect features
-    controller.setupProviderConnection(mx.createStream('provider'), originDomain)
-    controller.setupPublicConfig(mx.createStream('publicConfig'))
-  }
-
-  function setupTrustedCommunication (connectionStream, originDomain) {
-    // setup multiplexing
-    var mx = setupMultiplex(connectionStream)
-    // connect features
-    setupControllerConnection(mx.createStream('controller'))
-    controller.setupProviderConnection(mx.createStream('provider'), originDomain)
-  }
-
-  //
-  // remote features
-  //
-
-  function setupControllerConnection (outStream) {
-    var api = controller.getApi()
-    var dnode = Dnode(api)
-    outStream.pipe(dnode).pipe(outStream)
-    dnode.on('remote', (remote) => {
-      // push updates to popup
-      var sendUpdate = remote.sendUpdate.bind(remote)
-      controller.on('update', sendUpdate)
-      // teardown on disconnect
-      eos(outStream, () => {
-        controller.removeListener('update', sendUpdate)
-        popupIsOpen = false
-      })
-    })
-  }
-
   //
   // User Interface setup
   //

app/scripts/metamask-controller.js

@@ -2,11 +2,13 @@ const EventEmitter = require('events')
 const extend = require('xtend')
 const promiseToCallback = require('promise-to-callback')
 const pipe = require('pump')
+const Dnode = require('dnode')
 const ObservableStore = require('obs-store')
 const storeTransform = require('obs-store/lib/transform')
 const EthStore = require('./lib/eth-store')
 const EthQuery = require('eth-query')
 const MetaMaskProvider = require('web3-provider-engine/zero.js')
+const setupMultiplex = require('./lib/stream-utils.js').setupMultiplex
 const KeyringController = require('./keyring-controller')
 const NoticeController = require('./notice-controller')
 const messageManager = require('./lib/message-manager')
@@ -202,8 +204,35 @@ module.exports = class MetamaskController extends EventEmitter {
     }
   }
 
-  setupProviderConnection (stream, originDomain) {
-    stream.on('data', this.onRpcRequest.bind(this, stream, originDomain))
+  setupUntrustedCommunication (connectionStream, originDomain) {
+    // setup multiplexing
+    var mx = setupMultiplex(connectionStream)
+    // connect features
+    this.setupProviderConnection(mx.createStream('provider'), originDomain)
+    this.setupPublicConfig(mx.createStream('publicConfig'))
+  }
+
+  setupTrustedCommunication (connectionStream, originDomain) {
+    // setup multiplexing
+    var mx = setupMultiplex(connectionStream)
+    // connect features
+    this.setupControllerConnection(mx.createStream('controller'))
+    this.setupProviderConnection(mx.createStream('provider'), originDomain)
+  }
+
+  setupControllerConnection (outStream) {
+    const api = this.getApi()
+    const dnode = Dnode(api)
+    outStream.pipe(dnode).pipe(outStream)
+    dnode.on('remote', (remote) => {
+      // push updates to popup
+      const sendUpdate = remote.sendUpdate.bind(remote)
+      this.on('update', sendUpdate)
+    })
+  }
+
+  setupProviderConnection (outStream, originDomain) {
+    outStream.on('data', this.onRpcRequest.bind(this, outStream, originDomain))
   }
 
   onRpcRequest (stream, originDomain, request) {