gistfile1.rb

class Post

  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

alarm_handler = AlarmHandler.new(:post_search)
stats_collector = StatsCollector.new
Post.new(Searcher.new, alarm_handler, stats_collector, env['should_order'])