archive_generator_service.rb

require 'open-uri'
class ArchiveGeneratorService
  class << self
    def update
      returning new do |generator|
        generator.generate
        generator.upload
      end
    end
  end
  
  attr_reader :year, :month, :screenshot
  def initialize
    @year  = ENV['YEAR']  || Time.now.year.to_s
    @month = ENV['MONTH'] || Time.now.month.to_s
  end
  
  def generate
    @screenshot ||= ScreenShooter.screenshot_for(month_permalink_url)
  end
  
  def upload
    ProjectionistS3Object.store(
      ProjectionistS3Object.archive_image_key_for(year, month),
      open(screenshot.thumbnail),
      :access => :public_read
    )
  end
  
  private
    def month_permalink_url
      "http://project.ioni.st/#{year}/#{month}?hide_chrome=1"
    end
end

screen_shooter.rb

require 'net/http'
require 'uri'
class ScreenShooter
  SCREEN_SHOOTER_URL = 'http://www.browsrcamp.com/'
  
  class << self
    def screenshot_for(url)
      returning new(url) do |shooter|
        shooter.shoot
      end
    end
  end
  
  attr_reader :url
  def initialize(url)
    @url = url
  end
  
  def shoot(parameters = {})
    @shoot ||= Net::HTTP.post_form(URI.parse(SCREEN_SHOOTER_URL), default_parameters.merge(parameters))
  end
  
  def screenshot
    @screenshot ||= urls.first
  end
  
  def thumbnail
    @thumbnail ||= urls.last
  end
  
  private
    def default_parameters
      {
        'get'     => 1,  # Magic, just going with the flow
        'width'   => 800,
        'quality' => 1,  # PNG
        'url'     => URI.escape(url)
      }
    end
    
    def urls
      @urls ||= shoot.body.scan /http\S+safaritest\S+\.png/
    end
end