/*
 * Adds a new sorting option to dataTables called <code>date-dd-mmm-yyyy</code>. Also
 * includes a type detection plug-in. Matches and sorts date strings in
 * the format: <code>(dd/mmm/yyyy</code>. For example:
 *   <ul>
 *      <li>02-FEB-1978</li>
 *      <li>17-MAY-2013</li>
 *      <li>31-JAN-2014</li>
 *   </ul>
 *
 *  @name Date dd-mmm-yyyy
 *  @anchor date-dd-mmm-yyyy
 *  @author <a href="http://www.appliedinter.net/jeromy_works/">Jeromy French</a>
 */

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];
};

// 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);
};