# @private Inner workings of Ticket
module TicketService
# @private Inner workings of Ticket
module TicketFile
  
  # Removes other disposable data and references. File removed by file_id 
  # which is initially given with the +Common#Serve+ function.
  def del_file( file_id, ses_id=false )
    if ses_id and @files[:ses_ids].has_key?( ses_id )
      @files[:ses_ids][ses_id].delete( file_id ) if @files[:ses_ids][ses_id].include?( file_id )
    end
    @files[:by_id].delete( file_id ) if @files[:by_id].has_key?( file_id )
  end
  
  # extends expiration time of disposable data, essentially for keep-alive requests
  def push_keepalive_file( file_id, keep_alive ) # :nodoc:
    expiry_time = Time.now.to_i+keep_alive
    @expire_files[expiry_time] = [] unless @expire_files.has_key?(expiry_time)
    @expire_files[expiry_time].push( file_id )
  end
  
  # removes all expired files
  def expire_keepalive_files # :nodoc:
    curr_time = Time.now.to_i
    @expire_files.keys.sort.each do |exp_time|
      if exp_time < curr_time
        @expire_files[exp_time].size.times do |incr|
          file_id = @expire_files[exp_time].shift
          if @files[:by_id].has_key?(file_id)
            ses_id = @files[:by_id][file_id][3]
            del_file( file_id, ses_id )
          end
        end
        @expire_files.delete(exp_time) if @expire_files[exp_time].size == 0
      end
    end
  end
  
  # Shorthand for +Common#serve+ for serving a file. Expects served file to be
  # of type :file. Defaults the content_type to 'text/plain' and expects user
  # to input filename.
  def serve_file( msg, content='', content_type='text/plain', filename='' )
    return serve( msg, content, [content_type, filename], :file)
  end
  
end
end