/*********************************************************************************
 * SugarCRM Community Edition is a customer relationship management program developed by
 * SugarCRM, Inc. Copyright (C) 2004-2012 SugarCRM Inc.
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License version 3 as published by the
 * Free Software Foundation with the addition of the following permission added
 * to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED WORK
 * IN WHICH THE COPYRIGHT IS OWNED BY SUGARCRM, SUGARCRM DISCLAIMS THE WARRANTY
 * OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU Affero General Public License along with
 * this program; if not, see http://www.gnu.org/licenses or write to the Free
 * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 * 
 * You can contact SugarCRM, Inc. headquarters at 10050 North Wolfe Road,
 * SW2-130, Cupertino, CA 95014, USA. or at email address contact@sugarcrm.com.
 * 
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License version 3.
 * 
 * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "Powered by
 * SugarCRM" logo. If the display of the logo is not reasonably feasible for
 * technical reasons, the Appropriate Legal Notices must display the words
 * "Powered by SugarCRM".
 ********************************************************************************/



   
function JSTransaction(){
    this.JSTransactions = new Array();
    this.JSTransactionIndex = 0;
    this.JSTransactionCanRedo = false;
    this.JSTransactionTypes = new Array(); 
    

}

    JSTransaction.prototype.record = function(transaction, data){
        this.JSTransactions[this.JSTransactionIndex] = {'transaction':transaction , 'data':data};
        this.JSTransactionIndex++;
        this.JSTransactionCanRedo = false
    }
    JSTransaction.prototype.register = function(transaction, undo, redo){
        this.JSTransactionTypes[transaction] = {'undo': undo, 'redo':redo};
    }
    JSTransaction.prototype.undo = function(){
        if(this.JSTransactionIndex > 0){
            if(this.JSTransactionIndex > this.JSTransactions.length ){
                this.JSTransactionIndex  = this.JSTransactions.length;
            }
            var transaction = this.JSTransactions[this.JSTransactionIndex - 1];
            var undoFunction = this.JSTransactionTypes[transaction['transaction']]['undo'];
            undoFunction(transaction['data']);
            this.JSTransactionIndex--;
            this.JSTransactionCanRedo = true;
        }
    }
    JSTransaction.prototype.redo = function(){
        if(this.JSTransactionCanRedo && this.JSTransactions.length < 0)this.JSTransactionIndex = 0;
        if(this.JSTransactionCanRedo && this.JSTransactionIndex <= this.JSTransactions.length ){
            this.JSTransactionIndex++;
            var transaction = this.JSTransactions[this.JSTransactionIndex - 1];
            var redoFunction = this.JSTransactionTypes[transaction['transaction']]['redo'];
            redoFunction(transaction['data']);
        }
    }