facebooker_backend.rb

gistfile1.txt

module Technoweenie # :nodoc:
  module AttachmentFu # :nodoc:
    module Backends
      module FacebookerBackend
        class RequiredLibraryNotFoundError < StandardError; end
        class ConfigFileNotFoundError < StandardError; end

        def self.included(base) #:nodoc:
          verify_facebooker_is_present
        end
        
        def self.verify_facebooker_is_present
          begin
            begin 
              Facebooker
            rescue 
              require 'facebooker' 
            end 
          rescue LoadError 
            raise RequiredLibraryNotFoundError.new('Facebooker could not be loaded')
          end
        end
        
        attr_accessor :facebook_session

        def public_filename
          url
        end

        protected
          def destroy_file
            true # Facebook doesn't implement a destroy photo command
          end

          def rename_file
            true # Facebook doesn't implement a rename photo command
          end

          def save_to_storage
            unless @saved_to_storage
              data = (temp_path ? File.open(temp_path).read : temp_data)
              file_parameter = Net::HTTP::MultipartPostFile.new(filename, content_type, data )
              photo = facebook_session.user.upload_photo(file_parameter)
              @saved_to_storage = true
              update_attributes(:url => photo.src_big, :facebook_pid => photo.pid)
            end
            true
          end
      end
    end
  end
end