[Chromoting] Break up the webapp's init function into smaller chunks.

remoting/webapp/base/js/auth_init.js

Index: remoting/webapp/base/js/auth_init.js
diff --git a/remoting/webapp/base/js/auth_init.js b/remoting/webapp/base/js/auth_init.js
new file mode 100644
index 0000000000000000000000000000000000000000..abcff1d0e2194ef80aeeb7aaff46e7598bc24541
--- /dev/null
+++ b/remoting/webapp/base/js/auth_init.js
@@ -0,0 +1,79 @@
+// Copyright 2014 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.
+
+'use strict';
+
+/** @suppress {duplicate} */
+var remoting = remoting || {};
+
+remoting.initIdentity = function() {
+  if (base.isAppsV2()) {
+    remoting.identity = new remoting.Identity(consentRequired_);
+  } else {
+    remoting.oauth2 = new remoting.OAuth2();

[Jamie, 2014/11/19 19:31:24]

Do we need this global any more? Ideally, we should use remoting.identity
throughout, and fix any references to remoting.oauth2 (assuming they are
API-compatible).

[garykac, 2014/11/20 03:18:50]

I don't know if it is still required, but I don't think potentially-breaking
changes like that should be part of this cl. It's even less useful to make the
change since AppsV1 should be going away soon.

I'll add a TODO to follow-up on this.

+    if (!remoting.oauth2.isAuthenticated()) {
+      document.getElementById('auth-dialog').hidden = false;
+    }
+    remoting.identity = remoting.oauth2;
+  }
+}
+
+/** @param {remoting.Error} error */
+remoting.onGetIdentityInfoError = function(error) {
+  // No need to show the error message for NOT_AUTHENTICATED
+  // because we will show "auth-dialog".
+  if (error != remoting.Error.NOT_AUTHENTICATED) {
+    remoting.showErrorMessage(error);
+  }
+}
+
+/**
+ * @param {function(string):void} onEmailAvailable Callback invoked when the
+ *     email address is available.
+ * @return {void} Nothing.
+ */
+remoting.initIdentityEmail = function(onEmailAvailable) {
+  remoting.identity.getEmail(onEmailAvailable,
+                             remoting.onGetIdentityInfoError);
+}
+
+/**
+ * Get the user's email address and full name.
+ *
+ * @param {function(string,string):void} onUserInfoAvailable Callback invoked
+ *     when the user's email address and full name are available.
+ * @return {void} Nothing.
+ */
+remoting.initIdentityUserInfo = function(onUserInfoAvailable) {
+  remoting.identity.getUserInfo(onUserInfoAvailable,
+                                remoting.onGetIdentityInfoError);
+}
+
+/**
+ * Show the authorization consent UI and register a one-shot event handler to
+ * continue the authorization process.
+ *
+ * @param {function():void} authContinue Callback to invoke when the user
+ *     clicks "Continue".
+ */
+function consentRequired_(authContinue) {

[Jamie, 2014/11/19 19:31:24]

Since you're refactoring, this should be called something like
remoting.promptForConsent, or even make a local function definition in
initIdentity.

[garykac, 2014/11/20 03:18:50]

Done.

+  /** @type {HTMLElement} */
+  var dialog = document.getElementById('auth-dialog');
+  /** @type {HTMLElement} */
+  var button = document.getElementById('auth-button');
+  var consentGranted = function(event) {
+    dialog.hidden = true;
+    button.removeEventListener('click', consentGranted, false);
+    authContinue();
+    remoting.windowShape.updateClientWindowShape();
+  };
+  dialog.hidden = false;
+
+  /** @type {HTMLElement} */
+  var dialog_border = document.getElementById('auth-dialog-border');
+  remoting.authDialog = new remoting.AuthDialog(dialog_border);
+  remoting.windowShape.addCallback(remoting.authDialog);
+
+  button.addEventListener('click', consentGranted, false);
+}