[Chromoting] Move shared webapp JS files from crd/js -> base/js

remoting/webapp/crd/js/identity.js

-// Copyright (c) 2012 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.
-
-/**
- * @fileoverview
- * Wrapper class for Chrome's identity API.
- */
-/** @suppress {duplicate} */
-var remoting = remoting || {};
-
-(function(){
-
-'use strict';
-
-/**
- * @type {remoting.Identity}
- */
-remoting.identity = null;
-
-var USER_CANCELLED = 'The user did not approve access.';
-
-/**
- * @param {remoting.Identity.ConsentDialog=} opt_consentDialog
- * @constructor
- */
-remoting.Identity = function(opt_consentDialog) {
-  /** @private */
-  this.consentDialog_ = opt_consentDialog;
-  /** @private {string} */
-  this.email_ = '';
-  /** @private {string} */
-  this.fullName_ = '';
-  /** @private {Object<base.Deferred<string>>} */
-  this.authTokensDeferred_ = {};
-  /** @private {boolean} */
-  this.interactive_ = false;
-};
-
-/**
- * chrome.identity.getAuthToken should be initiated from user interactions if
- * called with interactive equals true.  This interface prompts a dialog for
- * the user's consent.
- *
- * @interface
- */
-remoting.Identity.ConsentDialog = function() {};
-
-/**
- * @return {Promise} A Promise that resolves when permission to start an
- *   interactive flow is granted.
- */
-remoting.Identity.ConsentDialog.prototype.show = function() {};
-
-/**
- * Gets an access token.
- *
- * @param {Array<string>=} opt_scopes Optional OAuth2 scopes to request. If not
- *     specified, the scopes specified in the manifest will be used. No consent
- *     prompt will be needed as long as the requested scopes are a subset of
- *     those already granted (in most cases, the remoting.Application framework
- *     ensures that the scopes specified in the manifest are already authorized
- *     before any application code is executed). Callers can request scopes not
- *     specified in the manifest, but a consent prompt will be shown.
- *
- * @return {!Promise<string>} A promise resolved with an access token
- *     or rejected with a remoting.Error.
- */
-remoting.Identity.prototype.getToken = function(opt_scopes) {
-  var key = getScopesKey(opt_scopes);
-  if (!this.authTokensDeferred_[key]) {
-    this.authTokensDeferred_[key] = new base.Deferred();
-    var options = {
-      'interactive': this.interactive_,
-      'scopes': opt_scopes
-    };
-    chrome.identity.getAuthToken(options,
-                                 this.onAuthComplete_.bind(this, opt_scopes));
-  }
-  return this.authTokensDeferred_[key].promise();
-};
-
-/**
- * Gets a fresh access token.
- *
- * @param {Array<string>=} opt_scopes Optional OAuth2 scopes to request, as
- *     documented in getToken().
- * @return {!Promise<string>} A promise resolved with an access token
- *     or rejected with a remoting.Error.
- */
-remoting.Identity.prototype.getNewToken = function(opt_scopes) {
-  /** @type {remoting.Identity} */
-  var that = this;
-
-  return this.getToken(opt_scopes).then(function(/** string */ token) {
-    return new Promise(function(resolve, reject) {
-      chrome.identity.removeCachedAuthToken({'token': token }, function() {
-        resolve(that.getToken());
-      });
-    });
-  });
-};
-
-/**
- * Removes the cached auth token, if any.
- *
- * @return {!Promise<null>} A promise resolved with the operation completes.
- */
-remoting.Identity.prototype.removeCachedAuthToken = function() {
-  return new Promise(function(resolve, reject) {
-    /** @param {string} token */
-    var onToken = function(token) {
-      if (token) {
-        chrome.identity.removeCachedAuthToken(
-            {'token': token}, resolve.bind(null, null));
-      } else {
-        resolve(null);
-      }
-    };
-    chrome.identity.getAuthToken({'interactive': false}, onToken);
-  });
-};
-
-/**
- * Gets the user's email address and full name.  The full name will be
- * null unless the webapp has requested and been granted the
- * userinfo.profile permission.
- *
- * TODO(jrw): Type declarations say the name can't be null.  Are the
- * types wrong, or is the documentation wrong?
- *
- * @return {!Promise<{email:string, name:string}>} Promise
- *     resolved with the user's email address and full name, or rejected
- *     with a remoting.Error.
- */
-remoting.Identity.prototype.getUserInfo = function() {
-  if (this.isAuthenticated()) {
-    /**
-     * The temp variable is needed to work around a compiler bug.
-     * @type {{email: string, name: string}}
-     */
-    var result = {email: this.email_, name: this.fullName_};
-    return Promise.resolve(result);
-  }
-
-  /** @type {remoting.Identity} */
-  var that = this;
-
-  return this.getToken().then(function(token) {
-    return new Promise(function(resolve, reject) {
-      /**
-       * @param {string} email
-       * @param {string} name
-       */
-      var onResponse = function(email, name) {
-        that.email_ = email;
-        that.fullName_ = name;
-        resolve({email: email, name: name});
-      };
-
-      remoting.oauth2Api.getUserInfo(onResponse, reject, token);
-    });
-  });
-};
-
-/**
- * Gets the user's email address.
- *
- * @return {!Promise<string>} Promise resolved with the user's email
- *     address or rejected with a remoting.Error.
- */
-remoting.Identity.prototype.getEmail = function() {
-  return this.getUserInfo().then(function(userInfo) {
-    return userInfo.email;
-  });
-};
-
-/**
- * Callback for the getAuthToken API.
- *
- * @param {Array<string>|undefined} scopes The explicit scopes passed to
- *     getToken, or undefined if no scopes were specified.
- * @param {?string} token The auth token, or null if the request failed.
- * @private
- */
-remoting.Identity.prototype.onAuthComplete_ = function(scopes, token) {
-  var key = getScopesKey(scopes);
-  var authTokenDeferred = this.authTokensDeferred_[key];
-
-  // Pass the token to the callback(s) if it was retrieved successfully.
-  if (token) {
-    var promise = this.authTokensDeferred_[key];
-    delete this.authTokensDeferred_[key];
-    promise.resolve(token);
-    return;
-  }
-
-  // If not, pass an error back to the callback(s) if we've already prompted the
-  // user for permission.
-  if (this.interactive_) {
-    var error_message =
-        chrome.runtime.lastError ? chrome.runtime.lastError.message
-                                 : 'Unknown error.';
-    console.error(error_message);
-    var error = (error_message == USER_CANCELLED) ?
-        new remoting.Error(remoting.Error.Tag.CANCELLED) :
-        new remoting.Error(remoting.Error.Tag.NOT_AUTHENTICATED);
-    this.authTokensDeferred_[key].reject(error);
-    delete this.authTokensDeferred_[key];
-    return;
-  }
-
-  // If there's no token, but we haven't yet prompted for permission, do so
-  // now.
-  var that = this;
-  var showConsentDialog =
-      (this.consentDialog_) ? this.consentDialog_.show() : Promise.resolve();
-  showConsentDialog.then(function() {
-    that.interactive_ = true;
-    var options = {
-      'interactive': that.interactive_,
-      'scopes': scopes
-    };
-    chrome.identity.getAuthToken(options,
-                                 that.onAuthComplete_.bind(that, scopes));
-  });
-};
-
-/**
- * Returns whether the web app has authenticated with the Google services.
- *
- * @return {boolean}
- */
-remoting.Identity.prototype.isAuthenticated = function() {
-  return remoting.identity.email_ !== '';
-};
-
-
-/**
- * @param {Array<string>=} opt_scopes
- * @return {string}
- */
-function getScopesKey(opt_scopes) {
-  return opt_scopes ? JSON.stringify(opt_scopes) : '';
-}
-
-})();