Rendering

require File.expand_path(File.dirname(__FILE__) + "/../config/environment")


class MockResponse
  def content_type
    'text/html'
  end
end

class  RenderingController < ApplicationController
  class << self
    # this is going to need to be an option in the final method call
    # it it used to determine the path of partials called like:
    #
    #   render :partial => "something"
    #
    # where the actual path is "/app/views/controller_that_handled_request/_something.erb"
    # so you can use this option/method to specify that relative directory
    # that is generated in the standard request process
    
    def controller_path
      "feed_items"
    end
  end
  
  def url_for(options = {})
    options ||= {}
    case options
    when String
      options
    when Hash
      ActionController::UrlRewriter.new(captured_request, {}).rewrite(rewrite_options(options))
    else
      polymorphic_url(options)
    end
  end
  
  def captured_request
     hash = {
      "SERVER_NAME"=>"localhost", 
      "HTTP_ACCEPT"=>"application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5", 
      "HTTP_CACHE_CONTROL"=>"max-age=0", 
      "HTTP_HOST"=>"localhost:3000", 
      "HTTP_USER_AGENT"=>"Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; en-US) AppleWebKit/533.4 (KHTML, like Gecko) Chrome/5.0.375.99 Safari/533.4", 
      "REQUEST_PATH"=>"/login", "rack.url_scheme"=>"http", 
      "SERVER_PROTOCOL"=>"HTTP/1.1", "HTTP_IF_NONE_MATCH"=>"\"31a7c7f10c0dcd41034ac24bd99aa6f4\"", 
      "HTTP_ACCEPT_LANGUAGE"=>"en-US,en;q=0.8",
      "REMOTE_ADDR"=>"127.0.0.1", "PATH_INFO"=>"/login", 
      "SERVER_SOFTWARE"=>"Mongrel 1.1.5", "rack.run_once"=>false, 
      "rack.version"=>[1, 1], "SCRIPT_NAME"=>"", 
      "HTTP_COOKIE"=>"/settings/todo/ready=true; /settings/email_account/configured=true; /settings/sms/ready=true; last_page_visited=%2Flogin; _crm_session=BAh7CDoQX2NzcmZfdG9rZW4iMTh3SG0xQm5iL1RiTzFDNkxraHl4S0NJaHpZL3duZGlPTm5pSFpFZHRHaVE9Og9zZXNzaW9uX2lkIiVmNjUxYmQyZTEyOTc5MTA4Y2E2ZTk3ZmMzOGZjZjQ4MiIKZmxhc2hJQzonQWN0aW9uQ29udHJvbGxlcjo6Rmxhc2g6OkZsYXNoSGFzaHsABjoKQHVzZWR7AA%3D%3D--eed2f740b8a99cc34261a8c83c4863e1d19d3b79", 
      "HTTP_VERSION"=>"HTTP/1.1", "rack.multithread"=>false, "REQUEST_URI"=>"/login", "rack.multiprocess"=>false, "SERVER_PORT"=>"3000", "HTTP_ACCEPT_CHARSET"=>"ISO-8859-1,utf-8;q=0.7,*;q=0.3", "REQUEST_METHOD"=>"GET", "GATEWAY_INTERFACE"=>"CGI/1.2", "HTTP_ACCEPT_ENCODING"=>"gzip,deflate,sdch", "HTTP_CONNECTION"=>"keep-alive"
    }
    ActionController::Request.new(hash)
  end
  
  def response
    @mock_response ||= MockResponse.new 
  end
  
  def session
    {}
  end
  
  def current_user
    User.new(:name => 'Adam')
  end
  
  def current_account
    Account.new
  end
end

class Renderer < ActionView::Base  
  def initialize(view_paths = [], assigns_for_first_render = {}, controller = RenderingController.new)
    super(view_paths, assigns_for_first_render, controller)
    
    # this is the part where we do some trickery to mimic the normal template rendering process
    # in rails
    self.helpers.send :include, ApplicationController.master_helper_module
    self.view_paths = determine_view_paths
    
    @template_format = :html
  end
  
  def do_something
    @output = render(:partial => 'feed_items/feed_item', :locals => {:feed_item => FeedItem.first })
  end
  
  def determine_view_paths
    Dir[Rails.root.join('app','views','**','*')].map {|dir| File.dirname(dir)}.uniq
  end
  
  def output
    @output.inspect
  end
end


I18n.locale = 'en'

r =  Renderer.new()
r.do_something
r.output