/*
 * Adds a new sorting option to dataTables called `date-dd-mmm-yyyy`. Also
 * includes a type detection plug-in. Matches and sorts date strings in
 * the format: `dd/mmm/yyyy`. For example:
 * 
 * * 02-FEB-1978
 * * 17-MAY-2013
 * * 31-JAN-2014
 *
 *  @name Date (dd-mmm-yyyy)
 *  @summary Sort dates in the format `dd-mmm-yyyy`
 *  @author [Jeromy French](http://www.appliedinter.net/jeromy_works/)
 *
 *  @example
 *    $('#example').dataTable( {
 *       columnDefs: [
 *         { type: 'date-dd-mmm-yyyy', targets: 0 }
 *       ]
 *    } );
 */

(function () {

var customDateDDMMMYYYYToOrd = function (date) {
	"use strict"; //let's avoid tom-foolery in this function
	// Convert to a number YYYYMMDD which we can use to order
	var dateParts = date.split(/-/);
	return (dateParts[2] * 10000) + ($.inArray(dateParts[1].toUpperCase(), ["JAN", "FEB", "MAR", "APR", "MAY", "JUN", "JUL", "AUG", "SEP", "OCT", "NOV", "DEC"]) * 100) + (dateParts[0]*1);
};

// This will help DataTables magic detect the "dd-MMM-yyyy" format; Unshift
// so that it's the first data type (so it takes priority over existing)
jQuery.fn.dataTableExt.aTypes.unshift(
	function (sData) {
		"use strict"; //let's avoid tom-foolery in this function
		if (/^([0-2]?\d|3[0-1])-(jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec)-\d{4}/i.test(sData)) {
			return 'date-dd-mmm-yyyy';
		}
		return null;
	}
);

// define the sorts
jQuery.fn.dataTableExt.oSort['date-dd-mmm-yyyy-asc'] = function (a, b) {
	"use strict"; //let's avoid tom-foolery in this function
	var ordA = customDateDDMMMYYYYToOrd(a),
		ordB = customDateDDMMMYYYYToOrd(b);
	return (ordA < ordB) ? -1 : ((ordA > ordB) ? 1 : 0);
};

jQuery.fn.dataTableExt.oSort['date-dd-mmm-yyyy-desc'] = function (a, b) {
	"use strict"; //let's avoid tom-foolery in this function
	var ordA = customDateDDMMMYYYYToOrd(a),
		ordB = customDateDDMMMYYYYToOrd(b);
	return (ordA < ordB) ? 1 : ((ordA > ordB) ? -1 : 0);
};

})();
