Presenter.rb

# if you look at your logged in twitter page, there's a crapload of information.  You might expect a controller like:

def index
  @followers_tweets = current_user.followers_tweets.limit(20)
  @recent_tweet = current_user.tweets.first
  @following = current_user.following.limit(5)
  @followers = current_user.followers.limit(5)
  @recent_favorite = current_user.favorite_tweets.first
  @recent_listed = current_user.recently_listed.limit(5)
 
  if current_user.trend_option == "worldwide"
    @trends = Trend.worldwide.by_promoted.limit(10)
  else
    @trends = Trend.filter_by(current_user.trend_option).limit(10)
  end
  ....
end

# Testing this could be a nightmare ... sloppy and hard to test!.  Might be cleaner to create our own presenter

class Tweets::IndexPresenter
  def initialize(user)
    @user = user
  end
  
  def followers_tweets
    @user.followers_tweets.limit(20)
  end
  
  def recent_tweet
    @user.tweets.first
  end
  
  ...
  
  def trends
    if @user.trend_option == "worldwide"
      Trend.worldwide.by_promoted.limit(10)
    else
      Trend.filter_by(@r.trend_option).limit(10)
    end
  end
end

# You might even store this in a /app/presenters/tweets/index_presenter.rb file. If you just created that presenters directory, you'd want to open up your config/application.rb and add:

config.autoload_paths += %W(#{config.root}/presenters)

# Then in your controller all you do is:

def index
  @presenter = Tweets::IndexPresenter.new(current_user)
end

# Then in your view you just access the presenter to get the data

# <%= @presenter.recent_tweet.body %>
# <%= @presenter.recent_tweet.created_at %>

# If you call these items multiple times like this.. you should probably be memoizing the items in your presenter

class Tweets::IndexPresenter
  def initialize(user)
    @user = user
  end
  
  def followers_tweets
    @followers_tweets ||= @user.followers_tweets.limit(20)
  end
  
  def recent_tweet
    @recent_tweet ||= @user.tweets.first
  end
  
  ...
  
end

# However, there's a shortcut for memoization which does the same thing

class Tweets::IndexPresenter
  extend ActiveSupport::Memoizable

  def initialize(user)
    @user = user
  end
  
  def followers_tweets
    @user.followers_tweets.limit(20)
  end
  
  def recent_tweet
    @user.tweets.first
  end
  
  ...
  
  memoize :followers_tweets, :recent_tweet
end