1'use strict';
 2
 3/**
 4 * Check if we're required to add a port number.
 5 *
 6 * @see https://url.spec.whatwg.org/#default-port
 7 * @param {Number|String} port Port number we need to check
 8 * @param {String} protocol Protocol we need to check against.
 9 * @returns {Boolean} Is it a default port for the given protocol
10 * @api private
11 */
12module.exports = function required(port, protocol) {
13  protocol = protocol.split(':')[0];
14  port = +port;
15
16  if (!port) return false;
17
18  switch (protocol) {
19    case 'http':
20    case 'ws':
21    return port !== 80;
22
23    case 'https':
24    case 'wss':
25    return port !== 443;
26
27    case 'ftp':
28    return port !== 21;
29
30    case 'gopher':
31    return port !== 70;
32
33    case 'file':
34    return false;
35  }
36
37  return port !== 0;
38};