module Bitly

# File lib/simple_bitlify.rb, line 40
def self.shorten(url)
  return url if !url || url.index("/bit.ly/")

  cache.fetch(url) || begin
    bitly_url = "#{self.url_base}&longUrl=#{CGI.escape(url)}"
    parsed = JSON.parse get(bitly_url) 

    shortened = parsed["data"]["url"] if parsed["status_code"] == 200
    cache.store(url, shortened || url, shortened ? TIME_TO_LIVE : TIME_TO_LIVE_FAILURE)
  end
end

# File lib/simple_bitlify.rb, line 31
def self.url_base
  @url_base ||= begin
    user, key = (self.config || {}).values_at "user", "key"

    raise "Missing or invalid bitly configuration: #{config.inspect}" unless user && key
    "https://api-ssl.bitly.com/v3/shorten?login=#{user}&apiKey=#{key}"
  end
end

# File lib/simple_bitlify.rb, line 54
def get(uri_str, limit = 10)
  raise 'too many redirections' if limit == 0

  uri = URI.parse(uri_str)
  
  http = Net::HTTP.new(uri.host, uri.port)
  if uri.scheme == "https"
    http.use_ssl = true
    http.verify_mode = OpenSSL::SSL::VERIFY_NONE
  end
  request = Net::HTTP::Get.new(uri.request_uri)
  response = http.request(request)

  case response
  when Net::HTTPSuccess then
    response.body
  when Net::HTTPRedirection then
    location = response['location']
    App.logger.debug "redirected to #{location}"
    get(location, limit - 1)
  else  
    response.value
  end
end