require 'tap/task'
require 'tap/mechanize/agent'

module Tap
  module Mechanize
    class Request < Tap::Task
      nest :mechanize, Agent, :instance_reader => :mechanize  # the mechanize agent
      
      # Returns the mechanize agent.
      #--
      # Overrides the default reader to ensure the agent log is set.
      def mechanize
        @mechanize ||= begin
          agent = Agent.new
          agent.log = app.logger
          agent
        end
      end
      
      # Submits each request in order and returns the final Page.
      # Returns nil if no requests are specified.
      def process(requests)
        unless requests.kind_of?(Array)
          requests = [requests]
        end
        
        requests.inject(nil) do |last_page, request|
          mechanize.fetch(request)
        end
      end
      
    end 
  end
end