/*! © SpryMedia Ltd - datatables.net/license */

/**
 *
 * This plug in will sort only on the number value that is included anywhere in a Regex.
 * This is useful for sorting data which requires some extra context to be included in the table.
 *
 *  @name numString
 *  @summary Sorting for number value that is included anywhere in a regex.
 *  @author [Sandy Galloway](http://datatables.net)
 *
 *
 *  @example
 * // This example shows a mixture of text and number values, with the number at the start of the expression.
 * // It is using regex and start and end of expression tags.
 * // It will match "5 examples completed." for example.
 * DataTable.numString(/^\d+ examples? completed.$/);
 * var table = $('#example').DataTable();
 *
 * @example
 * // This example shows a mixture of text and number values, with the number at the end of the expression.
 * // It is using regex and start and end of expression tags.
 * // It will match "Examples left: 67" for example.
 * DataTable.numString(/^Examples? left: \d+$/);
 * var table = $('#example').DataTable();
 *
 * @example
 * // This example shows a mixture of text and number values, with the number in the middle of the expression.
 * // It is using regex and no start and end of expression tags.
 * // It will match "Only 1 left." for example.
 * DataTable.numString(/Only \d+ left./);
 * var table = $('example').DataTable();
 *
 */

import DataTable from 'datatables.net';

declare module 'datatables.net' {
	interface DataTablesStatic {
		/** Sorting for number value that is included anywhere in a regex. */
		numString(format: RegExp);
	}
}

DataTable.numString = function (format) {
	// This is the type detection plug in
	DataTable.ext.type.detect.unshift(function (data) {
		if (typeof data !== 'string') {
			return null;
		}

		if (data.match(format)) {
			return 'numString-' + format.source;
		}

		return null;
	});

	// This is the ordering plug in
	DataTable.ext.type.order['numString-' + format.source + '-pre'] = function (
		data
	) {
		var num = data.replace(/\D/g, '');

		return num * 1;
	};
};