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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 'use strict'; | 5 'use strict'; |
6 | 6 |
7 /** | 7 /** |
8 * @fileoverview Utility objects and functions for Google Now extension. | 8 * @fileoverview Utility objects and functions for Google Now extension. |
9 * Most important entities here: | 9 * Most important entities here: |
10 * (1) 'wrapper' is a module used to add error handling and other services to | 10 * (1) 'wrapper' is a module used to add error handling and other services to |
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200 /** | 200 /** |
201 * Factory for wrapper plugins. If specified, it's used to generate an | 201 * Factory for wrapper plugins. If specified, it's used to generate an |
202 * instance of WrapperPlugin each time we wrap a callback (which corresponds | 202 * instance of WrapperPlugin each time we wrap a callback (which corresponds |
203 * to addListener call for Chrome events, and to every API call that specifies | 203 * to addListener call for Chrome events, and to every API call that specifies |
204 * a callback). WrapperPlugin's lifetime ends when the callback for which it | 204 * a callback). WrapperPlugin's lifetime ends when the callback for which it |
205 * was generated, exits. It's possible to have several instances of | 205 * was generated, exits. It's possible to have several instances of |
206 * WrapperPlugin at the same time. | 206 * WrapperPlugin at the same time. |
207 * An instance of WrapperPlugin can have state that can be shared by its | 207 * An instance of WrapperPlugin can have state that can be shared by its |
208 * constructor, prologue() and epilogue(). Also WrapperPlugins can change | 208 * constructor, prologue() and epilogue(). Also WrapperPlugins can change |
209 * state of other objects, for example, to do refcounting. | 209 * state of other objects, for example, to do refcounting. |
210 * @type {function(): WrapperPlugin} | 210 * @type {?function(): WrapperPlugin} |
211 */ | 211 */ |
212 var wrapperPluginFactory = null; | 212 var wrapperPluginFactory = null; |
213 | 213 |
214 /** | 214 /** |
215 * Registers a wrapper plugin factory. | 215 * Registers a wrapper plugin factory. |
216 * @param {function(): WrapperPlugin} factory Wrapper plugin factory. | 216 * @param {function(): WrapperPlugin} factory Wrapper plugin factory. |
217 */ | 217 */ |
218 function registerWrapperPluginFactory(factory) { | 218 function registerWrapperPluginFactory(factory) { |
219 if (wrapperPluginFactory) { | 219 if (wrapperPluginFactory) { |
220 reportError(buildErrorWithMessageForServer( | 220 reportError(buildErrorWithMessageForServer( |
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705 */ | 705 */ |
706 function isSignedIn(callback) { | 706 function isSignedIn(callback) { |
707 instrumented.webstorePrivate.getBrowserLogin(function(accountInfo) { | 707 instrumented.webstorePrivate.getBrowserLogin(function(accountInfo) { |
708 callback(!!accountInfo.login); | 708 callback(!!accountInfo.login); |
709 }); | 709 }); |
710 } | 710 } |
711 | 711 |
712 /** | 712 /** |
713 * Removes the specified cached token. | 713 * Removes the specified cached token. |
714 * @param {string} token Authentication Token to remove from the cache. | 714 * @param {string} token Authentication Token to remove from the cache. |
715 * @param {function} callback Called on completion. | 715 * @param {function()} callback Called on completion. |
716 */ | 716 */ |
717 function removeToken(token, callback) { | 717 function removeToken(token, callback) { |
718 instrumented.identity.removeCachedAuthToken({token: token}, function() { | 718 instrumented.identity.removeCachedAuthToken({token: token}, function() { |
719 // Let Chrome now about a possible problem with the token. | 719 // Let Chrome now about a possible problem with the token. |
720 getAuthToken(function() {}); | 720 getAuthToken(function() {}); |
721 callback(); | 721 callback(); |
722 }); | 722 }); |
723 } | 723 } |
724 | 724 |
725 var listeners = []; | 725 var listeners = []; |
726 | 726 |
727 /** | 727 /** |
728 * Registers a listener that gets called back when the signed in state | 728 * Registers a listener that gets called back when the signed in state |
729 * is found to be changed. | 729 * is found to be changed. |
730 * @param {function} callback Called when the answer to isSignedIn changes. | 730 * @param {function()} callback Called when the answer to isSignedIn changes. |
731 */ | 731 */ |
732 function addListener(callback) { | 732 function addListener(callback) { |
733 listeners.push(callback); | 733 listeners.push(callback); |
734 } | 734 } |
735 | 735 |
736 /** | 736 /** |
737 * Checks if the last signed in state matches the current one. | 737 * Checks if the last signed in state matches the current one. |
738 * If it doesn't, it notifies the listeners of the change. | 738 * If it doesn't, it notifies the listeners of the change. |
739 */ | 739 */ |
740 function checkAndNotifyListeners() { | 740 function checkAndNotifyListeners() { |
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765 // One hour is just an arbitrary amount of time chosen. | 765 // One hour is just an arbitrary amount of time chosen. |
766 chrome.alarms.create(alarmName, {periodInMinutes: 60}); | 766 chrome.alarms.create(alarmName, {periodInMinutes: 60}); |
767 | 767 |
768 return { | 768 return { |
769 addListener: addListener, | 769 addListener: addListener, |
770 getAuthToken: getAuthToken, | 770 getAuthToken: getAuthToken, |
771 isSignedIn: isSignedIn, | 771 isSignedIn: isSignedIn, |
772 removeToken: removeToken | 772 removeToken: removeToken |
773 }; | 773 }; |
774 } | 774 } |
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