SITools2

/***************************************

* Copyright 2010-2014 CNES - CENTRE NATIONAL d'ETUDES SPATIALES

* 

* This file is part of SITools2.

* 

* SITools2 is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

* 

* SITools2 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 General Public License for more details.

* 

* You should have received a copy of the GNU General Public License

* along with SITools2.  If not, see <http://www.gnu.org/licenses/>.

***************************************/

Ext.namespace('sitools.public.utils');

/**

 * An utility class to use for specific sitools dates.

 */

Ext.define("sitools.public.utils.Date", {

    singleton : true,

        /**

         * The regExp to test if a string can be transformed to a date 

         */

        regToday : new RegExp("^\{\\$TODAY\} *(\\+ *[0-9]*|\\- *[0-9]*)?$"),

        /**

         * in the template {$TODAY} + x, determine the x unit (currently it is a Day)

         * @type 

         */

        timeInterval : Ext.Date.DAY, 

        /**

         * Transform a String value containing {$TODAY} into a valid date.

         * @param {String} val the string value

         * @return {Date} the date Value.

         */

        stringWithTodayToDate : function(val) {

                if (Ext.isDate(val)) {

                        return val;

                }

                if (!this.regToday.test(val)) {

                        return null;

                }

                var regNbJour = new RegExp("[0-9]+", "g");

                var regOp = new RegExp("[+]|[-]");

                var nbJour = parseFloat(regNbJour.exec(val));

                var op = regOp.exec(val);

                var result = new Date();

                if (Ext.isEmpty(nbJour) && !Ext.isEmpty(op)) {

                        return null;

                }

                if (!Ext.isEmpty(nbJour) && !Ext.isEmpty(op)) {

                        if (op == "-") {

                                nbJour = nbJour * -1;

                        }

                        result = Ext.Date.add(result, this.timeInterval, nbJour); 

                }

                return result;

        }, 

        /**

         * Test if a date object is valid or not.

         * @param {Date} d date value

         * @return {Boolean} valid or not valid

         */

        isValidDate : function (d) {

                if ( Object.prototype.toString.call(d) !== "[object Date]" )

                        return false;

                return !isNaN(d.getTime());

        }

});