Garfio

Garfio helps you to build hooks in your ruby objects, is minimalist and framework-agnostic.

With few lines of code, one method compilation, no monkey patching and no method missing Garfio lets you launch callbacks before and after of your methods as soon as you run them.

Installing Garfio is as simple as running:

$ gem install garfio

Include Garfio in your Gemfile with gem 'garfio' or require it with require 'garfio'.

Once you have extend Garfio, you can define your before and after callbacks in the set_hook method, your callback recognize the method sending his name as symbol

class User
  extend Garfio

  def send_greeting
    puts "preparing the welcome message"
  end

  def register_user
    puts "registering user"
  end

  def send_mailer
    puts "sending to your email"
  end

  set_hook :register_user do
    before :send_greeting
    after :send_mailer
  end
end

User.new.register_user
#=> preparing the welcome message
#=> registering user
#=> sending to your email

Is not neccesary indicate both callbacks, you can work with just before or after

  set_hook :register_user do
    before :send_greeting
  end

Also you can send blocks to your callbacks

set_hook :register_user do
  before { puts "hello user!" }
  after { puts "Ok, bye" }
end

User.new.register_user
#=> hello user!
#=> registering user
#=> Ok, bye

And you can take advantage of them to do more complex stuff

set_hook :register_user do
  after do
    update_status_with("activate")
    send_mailer
    notify_friends
  end
end