[Webapp Refactor] Implement AppRemotingActivity.

remoting/webapp/app_remoting/js/app_remoting_activity.js

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/** @suppress {duplicate} */
+var remoting = remoting || {};
+
+/**
+ * Type definition for the RunApplicationResponse returned by the API.
+ * @typedef {{
+ *   status: string,
+ *   hostJid: string,
+ *   authorizationCode: string,
+ *   sharedSecret: string,
+ *   host: {
+ *     applicationId: string,
+ *     hostId: string
+ *   }
+ * }}
+ */
+remoting.AppHostResponse;
+
+(function() {
+
+'use strict';
+
+/**
+ * @constructor
+ * @implements {remoting.Activity}
+ */
+remoting.AppRemotingActivity = function() {
+  /** @private {remoting.AppConnectedView} */
+  this.connectedView_ = null;
+};
+
+remoting.AppRemotingActivity.prototype.dispose = function() {
+  base.dispose(this.connectedView_);
+  this.connectedView_ = null;
+  remoting.LoadingWindow.close();
+};
+
+remoting.AppRemotingActivity.prototype.start = function() {
+  remoting.LoadingWindow.show();
+  var that = this;
+  return remoting.identity.getToken().then(function(/** string */ token) {
+    return that.getAppHostInfo_(token);
+  }).then(function(/** !remoting.Xhr.Response */ response) {
+    that.onAppHostResponse_(response);
+  });
+};
+
+/**
+ * @param {string} token
+ * @return {Promise<!remoting.Xhr.Response>}
+ * @private
+ */
+remoting.AppRemotingActivity.prototype.getAppHostInfo_ = function(token) {
+  var url = remoting.settings.APP_REMOTING_API_BASE_URL + '/applications/' +
+            remoting.settings.getAppRemotingApplicationId() + '/run';
+  return new remoting.Xhr({
+    method: 'POST',
+    url: url,
+    oauthToken: token
+  }).start();
+};
+
+/**
+ * @param {!remoting.Xhr.Response} xhrResponse
+ * @private
+ */
+remoting.AppRemotingActivity.prototype.onAppHostResponse_ =
+    function(xhrResponse) {
+  if (xhrResponse.status == 200) {
+    var response = /** @type {remoting.AppHostResponse} */
+        (base.jsonParseSafe(xhrResponse.getText()));
+    if (response &&
+        response.status &&
+        response.status == 'done' &&
+        response.hostJid &&
+        response.authorizationCode &&
+        response.sharedSecret &&
+        response.host &&
+        response.host.hostId) {
+      var hostJid = response.hostJid;
+      var host = new remoting.Host(response.host.hostId);
+      host.jabberId = hostJid;
+      host.authorizationCode = response.authorizationCode;
+      host.sharedSecret = response.sharedSecret;
+
+      remoting.setMode(remoting.AppMode.CLIENT_CONNECTING);
+
+      var idleDetector = new remoting.IdleDetector(
+          document.getElementById('idle-dialog'),
+          remoting.app.disconnect.bind(remoting.app));
+
+      /**
+       * @param {string} tokenUrl Token-issue URL received from the host.
+       * @param {string} hostPublicKey Host public key (DER and Base64
+       *     encoded).
+       * @param {string} scope OAuth scope to request the token for.
+       * @param {function(string, string):void} onThirdPartyTokenFetched
+       *     Callback.
+       */
+      var fetchThirdPartyToken = function(
+          tokenUrl, hostPublicKey, scope, onThirdPartyTokenFetched) {
+        // Use the authentication tokens returned by the app-remoting server.
+        onThirdPartyTokenFetched(host['authorizationCode'],
+                                 host['sharedSecret']);
+      };
+
+      var connector = remoting.SessionConnector.factory.createConnector(
+          document.getElementById('client-container'),
+          remoting.app_capabilities(), this);

[garykac, 2015/04/15 00:52:37]

Having this call out to the global might make this a little bit harder to test.
I think it's better to pass this in via AppRemoting (but I'm willing to be
convinced otherwise).

+
+      connector.connect(remoting.Application.Mode.APP_REMOTING, host,
+                        new remoting.CredentialsProvider(
+                            {fetchThirdPartyToken: fetchThirdPartyToken}));
+    } else if (response && response.status == 'pending') {
+      this.onError(new remoting.Error(
+          remoting.Error.Tag.SERVICE_UNAVAILABLE));
+    }
+  } else {
+    console.error('Invalid "runApplication" response from server.');
+    this.onError(remoting.Error.fromHttpStatus(xhrResponse.status));
+  }
+};
+
+/**
+ * @param {remoting.ConnectionInfo} connectionInfo
+ */
+remoting.AppRemotingActivity.prototype.onConnected = function(connectionInfo) {
+  this.connectedView_ = new remoting.AppConnectedView(
+      document.getElementById('client-container'), connectionInfo);
+
+  // Map Cmd to Ctrl on Mac since hosts typically use Ctrl for keyboard
+  // shortcuts, but we want them to act as natively as possible.
+  if (remoting.platformIsMac()) {
+    connectionInfo.plugin().setRemapKeys('0x0700e3>0x0700e0,0x0700e7>0x0700e4');
+  }
+};
+
+remoting.AppRemotingActivity.prototype.onDisconnected = function() {
+  base.dispose(this.connectedView_);
+  this.connectedView_ = null;
+  chrome.app.window.current().close();
+};
+
+/**
+ * @param {!remoting.Error} error
+ */
+remoting.AppRemotingActivity.prototype.onConnectionFailed = function(error) {
+  this.onError(error);
+};
+
+/**
+ * @param {!remoting.Error} error The error to be localized and displayed.
+ */
+remoting.AppRemotingActivity.prototype.onError = function(error) {
+  console.error('Connection failed: ' + error.toString());
+  remoting.LoadingWindow.close();
+  remoting.MessageWindow.showErrorMessage(
+      chrome.i18n.getMessage(/*i18n-content*/'CONNECTION_FAILED'),
+      chrome.i18n.getMessage(error.getTag()));
+  base.dispose(this.connectedView_);
+  this.connectedView_ = null;
+};
+
+})();