sorah-is-network-stable

#!/usr/bin/env ruby

unless RUBY_PLATFORM =~ /darwin/
  exit 0
end

stable_wifi_aps = %w(sorah soraher)
if File.exist?(File.expand_path('~/.sorah_stable_aps'))
  stable_wifi_aps.concat File.read(File.expand_path('~/.sorah_stable_aps')).each_line.map(&:chomp)
end

list = `networksetup -listallhardwareports`

active_iface_raw = `route get default`.match(/^\s*interface:\s*(.+)$/)[1]

iface_to_name = Hash[list.scan(/Hardware Port: (.+)\nDevice: (.+)\n/).map { |(name,iface)| [iface, name] }]
aliases = Hash[list.scan(/Parent Device: (.+)\nDevice (?:\(.+\))?: (.+)\n/).map { |(parent,iface)| [iface, parent] }]

active_iface = aliases[active_iface_raw] || active_iface_raw

if active_iface.start_with?('ppp') # VPN
  exit 1
end

wifi_ap = begin
  match = IO.popen(['networksetup', '-getairportnetwork', active_iface], 'r', &:read).
    match(/^Current Wi-Fi Network: (.+)$/)
  match && match[1]
end

if wifi_ap
  exit stable_wifi_aps.include?(wifi_ap) ? 0 : 1
else
  case iface_to_name[active_iface]
  when /Bluetooth/i
    exit 1
  when /iPhone|iPad/i
    exit 1
  end

  exit 0
end