module LearningObject::DuplicateAttachmentChecker

  def self.check_duplicates(learning_object, media_path)
    file_size = File.size media_path
    file_name = File.basename media_path

    learning_object.attachments.each do |learning_object|
      if attachment.size == file_size && attachment.name == file_name
        return true
      end
    end
  end

  def self.check_duplicates!(learning_object, media_path)
    if check_duplicates learning_object, media_path
      raise DuplicateAttachmentError, 'The attachment already exists!'
    end
  end

end