require 'rubygems'
require 'hpricot'
require 'net/http'

class Requester

  CookieStore = '.requester-wget-cookies'

  def initialize opts
    `touch #{CookieStore}`
    @opts = opts
  end

  def as email, pass, &block
    if login email, pass
      puts "logged in."
      puts ""
      yield self
      logout
    else
      puts 'login failed.'
    end
  end

  def login email = nil, pass = nil
    post '/login', 'account[email]' => email, 'account[pass]' => pass
  end
  
  def logout
    puts ""
    get '/logout'
  end

  def get path
    puts "GET #{path}"
    wget path
  end

  def post path, post_hash
    post_data = post_hash.merge('authenticity_token' => auth_token).map {|k,v| "#{k}=#{v}" }.join('&')
    puts "POST #{path}"
    wget path, %Q{--post-data="#{post_data}"}
  end

  private

  def wget path, *args
    Hpricot `wget #{File.join("http://#{@opts[:domain]}", path)} --load-cookies #{CookieStore} --save-cookies #{CookieStore} --keep-session-cookies -O - #{args.join(' ')}`
  end

  def auth_token
    if @auth_token
      @auth_token # already set
    elsif (auth_token_input = (get('/login') / :input).detect {|input| input.attributes['name'] == 'authenticity_token' }).nil?
      puts "Couldn't get auth_token."
    else
      @auth_token = auth_token_input.attributes['value']
    end
  end
  
end

req = Requester.new :domain => 'corkboard.local'

req.as 'ben@hoskings.net', 'sekrit' do
  puts (req.get('/transfers') / '.transfer_name').map(&:html)
end