chischaschos/basic_decorator_example.rb

## basic_decorator_example.rb
# This module helps converting to string every object that includes it
module Stringfier
  attr_reader :app
  def to_str
    "Your app http status is: -> #{@app[0]}<-, " + \
    "with headers: ->#{@app[1]}<-, " + \
    "and body: ->#{@app[2]}<-"
  end
end

# This class receives an array of three elements and stores it in an instance variable @app,
# the third element of the array is supposed to be the HTTP body
class MyBaseApp
  include Stringfier
  def initialize(*base_app)
    @app = base_app
  end
end

# This class wraps the MyBaseApp body with html tags and adds a text/html content
# type header
class Htmlfier
  include Stringfier
  def initialize(*base_app)
    @app = htmlfy(*base_app)
  end
  def htmlfy(base_app)
    [base_app.app[0], {'Content-type' => 'text/html'}, "<html><head><title>Htmlfied</title></head><body>#{base_app.app[2].join}</body></html>"]
  end
end

# This class converts the MyBaseApp body to json and adds a application/json content
# type header
class Jsonfier
  include Stringfier
  require 'rubygems'
  require 'json'

  def initialize(*base_app)
    @app = jsonfy(*base_app)
  end
  def jsonfy(base_app)
    [base_app.app[0], {'Content-type' => 'application/json'}, JSON.generate(base_app.app[2])]
  end
end

base_app = MyBaseApp.new(200, {}, ['Original response body'])

p "R1: " + base_app

p "R2: " + Htmlfier.new(base_app)

p "R2: " + Jsonfier.new(base_app)
	# This module helps converting to string every object that includes it
	module Stringfier
	attr_reader :app
	def to_str
	"Your app http status is: -> #{@app[0]}<-, " + \
	"with headers: ->#{@app[1]}<-, " + \
	"and body: ->#{@app[2]}<-"
	end
	end

	# This class receives an array of three elements and stores it in an instance variable @app,
	# the third element of the array is supposed to be the HTTP body
	class MyBaseApp
	include Stringfier
	def initialize(*base_app)
	@app = base_app
	end
	end

	# This class wraps the MyBaseApp body with html tags and adds a text/html content
	# type header
	class Htmlfier
	include Stringfier
	def initialize(*base_app)
	@app = htmlfy(*base_app)
	end
	def htmlfy(base_app)
	[base_app.app[0], {'Content-type' => 'text/html'}, "<html><head><title>Htmlfied</title></head><body>#{base_app.app[2].join}</body></html>"]
	end
	end

	# This class converts the MyBaseApp body to json and adds a application/json content
	# type header
	class Jsonfier
	include Stringfier
	require 'rubygems'
	require 'json'

	def initialize(*base_app)
	@app = jsonfy(*base_app)
	end
	def jsonfy(base_app)
	[base_app.app[0], {'Content-type' => 'application/json'}, JSON.generate(base_app.app[2])]
	end
	end

	base_app = MyBaseApp.new(200, {}, ['Original response body'])

	p "R1: " + base_app

	p "R2: " + Htmlfier.new(base_app)

	p "R2: " + Jsonfier.new(base_app)