utils.js
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utils.js
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	// Licence: GPLv3 & GPLv2 (dual licensed)
	// Original source: https://github.com/Ladsgroup/CheckUserHelper
	'use strict';

	/**
	* Compare IP addresses in a way that is
	* compatible with Array.sort.
	*
	* @param {string} a The first IP
	* @param {string} b The second IP
	* @return {number} An integer that can be used by Array.sort
	*/
	function compareIPs( a, b ) {
	return calculateIPNumber( a ) - calculateIPNumber( b );
	}

	/**
	* Converts a string IP address to an integer
	* representation such that IP addresses can
	* be numerically compared.
	*
	* @param {string} ip
	* @return {number}
	*/
	function calculateIPNumber( ip ) {
	return ip.includes( '.' ) ?
	Number(
	ip.split( '.' ).map(
	( num ) => ( '000' + num ).slice( -3 )
	).join( '' )
	) : Number(
	'0x' + ip.split( ':' ).map(
	( num ) => ( '0000' + num ).slice( -4 )
	).join( '' )
	);
	}

	module.exports = {
	compareIPs: compareIPs,
	calculateIPNumber: calculateIPNumber
	};