engagementgamelab/CivicSeed

'use strict'

var ignoreRE = /^(127\.0\.0\.1|::1|fe80(:1)?::1(%.*)?)$/i
var exec = require('child_process').exec
var cached
var command
var filterRE

if (process.platform === 'win32') {
  command = 'ipconfig'
  filterRE = /\bIPv[46][^:\r\n]+:\s*([^\s]+)/g
} else if (process.platform === 'darwin') {
  command = 'ifconfig'
  filterRE = /\binet\s+([^\s]+)/g
} else {
  command = 'ifconfig'
  filterRE = /\binet\b[^:]+:\s*([^\s]+)/g
}

module.exports = {

  getNetworkIPs: function(callback, bypassCache) {
    if (cached && !bypassCache) {
      callback(null, cached)
      return
    }

    exec(command, function (error, stdout, sterr) {
      cached = []
      var ip
      var matches = stdout.match(filterRE) || []
      for (var i = 0; i < matches.length; i++) {
        ip = matches[i].replace(filterRE, '$1')
        if (!ignoreRE.test(ip)) {
          cached.push(ip)
        }
      }
      callback(error, cached)
    })
  }
}