require 'httparty'
require 'tempfile'

class AmazonCopy
  def download_video videolisting
    if not videolisting.on_s3
      download_file_and_upload_to_s3 videolisting.get_video_url,
                                     videolisting.videocode,
                                     "mp4",
                                     "bvideos"

      download_file_and_upload_to_s3 videolisting.get_preview_url,
                                     videolisting.videocode,
                                     "mp4",
                                     "bvideos_preview"

      videolisting.on_s3 = true
      videolisting.save
    end

  end

  def download_file_and_upload_to_s3 url, videocode, extension, prefix
    file = Tempfile.new ["video_", ".#{extension}"], "#{Rails.root}/tmp"
    begin
      file.write HTTParty.get(url).parsed_response.force_encoding("utf-8")
      file.flush

      s3 = AWS::S3.new
      obj = s3.buckets[ENV['VIDEO_BUCKET']].objects["#{prefix}/#{videocode}.mp4"]
      obj.write(file)

    ensure
      file.close
      file.unlink
    end
  end

  handle_asynchronously :download_video
end