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// Copyright 2013 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.
/**
* Manage the installation of apps.
*
* @param {string} itemId Item id to be installed.
* @param {!CWSWidgetContainer.PlatformDelegate} delegate Delegate for accessing
* Chrome platform APIs.
* @constructor
* @struct
*/
function AppInstaller(itemId, delegate) {
/** @private {!CWSWidgetContainer.PlatformDelegate} */
this.delegate_ = delegate;
this.itemId_ = itemId;
this.callback_ = null;
}
/**
* Type of result.
*
* @enum {string}
* @const
*/
AppInstaller.Result = {
SUCCESS: 'AppInstaller.success',
CANCELLED: 'AppInstaller.cancelled',
ERROR: 'AppInstaller.error'
};
Object.freeze(AppInstaller.Result);
/**
* Error message for user cancellation. This must be match with the constant
* 'kUserCancelledError' in C/B/extensions/webstore_standalone_installer.cc.
* @type {string}
* @const
* @private
*/
AppInstaller.USER_CANCELLED_ERROR_STR_ = 'User cancelled install';
/**
* Start an installation.
* @param {function(AppInstaller.Result, string)} callback Called when the
* installation is finished.
*/
AppInstaller.prototype.install = function(callback) {
this.callback_ = callback;
this.delegate_.installWebstoreItem(
this.itemId_,
this.onInstallCompleted_.bind(this));
};
/**
* Prevents {@code this.callback_} from being called.
*/
AppInstaller.prototype.cancel = function() {
// TODO(tbarzic): Would it make sense to uninstall the app on success if the
// app instaler is cancelled instead of just invalidating the callback?
this.callback_ = null;
};
/**
* Called when the installation is completed.
*
* @param {?string} error Null if the installation is success,
* otherwise error message.
* @private
*/
AppInstaller.prototype.onInstallCompleted_ = function(error) {
if (!this.callback_)
return;
var installerResult = AppInstaller.Result.SUCCESS;
if (error !== null) {
installerResult =
error == AppInstaller.USER_CANCELLED_ERROR_STR_ ?
AppInstaller.Result.CANCELLED :
AppInstaller.Result.ERROR;
}
this.callback_(installerResult, error || '');
this.callback_ = null;
};
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