/*****************************************************************************
 * Open MCT, Copyright (c) 2014-2016, United States Government
 * as represented by the Administrator of the National Aeronautics and Space
 * Administration. All rights reserved.
 *
 * Open MCT is licensed under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0.
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 * Open MCT includes source code licensed under additional open source
 * licenses. See the Open Source Licenses file (LICENSES.md) included with
 * this source code distribution or the Licensing information page available
 * at runtime from the About dialog for additional information.
 *****************************************************************************/
define(['./Transaction'], function (Transaction) {
    /**
     * A nested transaction is a transaction which takes place in the context
     * of a larger parent transaction. It becomes part of the parent
     * transaction when (and only when) committed.
     * @param parent
     * @constructor
     * @extends {platform/commonUI/edit/services.Transaction}
     * @memberof platform/commonUI/edit/services
     */
    function NestedTransaction(parent) {
        this.parent = parent;
        Transaction.call(this, parent.$log);
    }

    NestedTransaction.prototype = Object.create(Transaction.prototype);

    NestedTransaction.prototype.commit = function () {
        this.parent.add(
            Transaction.prototype.commit.bind(this),
            Transaction.prototype.cancel.bind(this)
        );
        return Promise.resolve(true);
    };

    return NestedTransaction;
});