特定のネットワークに入ったらSlackに投稿

wifi-slack.rb

# thanks to
# http://tech.actindi.net/3658802473
# http://yachibit.hateblo.jp/entry/2014/04/15/230301

require 'open-uri'

def hello
  require 'date'
  office = ['WIFI SSID']
  path = '/Users/xxxxx/Dropbox/wifi-slack/last'
  return if File.exists?(path) && Date.parse(File.read(path)) == Date.today

  x = `networksetup -getairportnetwork en0`.match(/Current Wi-Fi Network: (.+)/)

  return unless x
  ssid = x[1]

  if office.include?(ssid)
    params = {
      token: 'YOUR SLACK API TOKEN',
      channel: 'YOUR CANNEL',
      text: 'TEXT',
      as_user: 'true',
    }.map {|k, v| "#{k}=#{v}" }.join('&')

    require 'uri'
    url = "https://slack.com/api/chat.postMessage?#{URI.encode(params)}"

    res = open(url)
    code, message = res.status

    if code == '200'
      File.write(path, Date.today.to_s)
    else
      p 'error'
    end
  end
end

hello