Add factory method.

gistfile1.rb

class Post
  # Make the DI overhead a bit more bareable with a factory method. You can
  # still use the default constructor if you need the extra flexibility.
  #
  # I'm not quite sure about this last parameter though for the should_order.
  # Most of the time passing a boolean is a code smell that you have some unwanted
  # control coupling...
  #
  def self.standard_post(should_order)
    alarm_handler = AlarmHandler.new(:post_search)
    stats_collector = StatsCollector.new
    new(Searcher.new, alarm_handler, stats_collector, should_order)
  end

  def initialize(searcher, alarm_handler, stats_collector, should_order_posts)
    @searcher = searcher
    @alarm_handler = alarm_handler
    @status_collector = stats_collector
    @should_order_posts = should_order_posts
  end
  
  def search(keywords)
    search = @searcher.search(keywords, should_order_posts)
    @alarm_handler.raise('empty!') if search.results.empty?
    @stats_collector.register_event(:post_search, keywords)
    search.results
  end
end

class SunspotSearcher
  def search(keywords, should_order)
    Sunspot.search do
      fulltext keywords
      order_by :published_at, :desc if should_order
    end
  end
end

Post.standard_post(env['should_order'])