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

/**
 * When dealing with computer file sizes, it is common to append a post fix
 * such as B, KB, MB or GB to a string in order to easily denote the order of
 * magnitude of the file size. This plug-in allows sorting to take these
 * indicates of size into account.
 *
 * A counterpart type detection plug-in is also available.
 *
 *  @name File size
 *  @summary Sort abbreviated file sizes correctly (8MB, 4KB, etc)
 *  @author Allan Jardine - datatables.net
 *
 *  @example
 *    $('#example').DataTable( {
 *       columnDefs: [
 *         { type: 'file-size', targets: 0 }
 *       ]
 *    } );
 */

import DataTable from 'datatables.net';

DataTable.ext.type.order['file-size-pre'] = function (data) {
	if (data === null || data === '') {
		return 0;
	}

	var matches = data.match(/^(\d+(?:\.\d+)?)\s*([a-z]+)/i);
	var multipliers = {
		b: 1,
		bytes: 1,
		kb: 1000,
		kib: 1024,
		mb: 1000000,
		mib: 1048576,
		gb: 1000000000,
		gib: 1073741824,
		tb: 1000000000000,
		tib: 1099511627776,
		pb: 1000000000000000,
		pib: 1125899906842624,
	};

	if (matches) {
		var multiplier = multipliers[matches[2].toLowerCase()];
		return parseFloat(matches[1]) * multiplier;
	}

	return -1;
};