#! /usr/bin/env ruby

require 'twitter'
require 'yaml'
require 'net/http'
require 'uri'

#Specify and load config
CONFIG_FILE = 'config.yaml'
$config = YAML::load(File.open(File.join(File.dirname(__FILE__), CONFIG_FILE)))

# Configure and create the twitter client
Twitter.configure do |config|
  config.consumer_key = $config['oauth']['consumer_key']
  config.consumer_secret = $config['oauth']['consumer_secret']
  config.oauth_token = $config['oauth']['request_token']
  config.oauth_token_secret = $config['oauth']['request_secret']
end

client = Twitter::Client.new

# Read last known status from cache
last_status = $config['worker']['last_status'].to_s

# Get current status from web
url = URI.parse('http://www.chaostreff-dortmund.de/')
res = Net::HTTP.start(url.host, url.port) {|http|
  http.get('/raumstatus.php?txt')
}
$current_status = res.body.to_s.strip


# If status differs from last time checked, put the announcement
if (last_status != $current_status)
  if ($current_status == "offline")
    tweet = "Der Raum ist jetzt OFFLINE."
    status = "offline"
  elsif ($current_status == "online")
    tweet = "Der Raum ist jetzt ONLINE."
    status = "online"
  else 
    tweet = "Raumstatus UNBEKANNT."
    status = "unknown"
  end
  $config['worker']['last_status'] = status
  File.open(CONFIG_FILE, 'w') { |f| YAML.dump($config, f) }
  client.update(tweet)
end