Initial commit

.gitignore

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+*.gem
+*.rbc
+.bundle
+.config
+.yardoc
+Gemfile.lock
+InstalledFiles
+_yardoc
+coverage
+doc/
+lib/bundler/man
+pkg
+rdoc
+spec/reports
+test/tmp
+test/version_tmp
+tmp
+log
+gemfiles

Appraisals

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+appraise "rails30" do
+  gem "rails", "3.0.15"
+end
+
+appraise "rails31" do
+  gem "rails", "3.1.6"
+end
+
+appraise "rails32" do
+  gem "rails", "3.2.6"
+end
+
+appraise "rails4" do
+  gem "rails",
+    :git => "git@github.com:rails/rails.git"
+  gem "activerecord-deprecated_finders",
+    :git => "git@github.com:rails/activerecord-deprecated_finders"
+  gem "journey",
+    :git => "git@github.com:rails/journey"
+end

Gemfile

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+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in keynote.gemspec
+gemspec

LICENSE

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+Copyright (c) 2012 Ryan Fitzgerald
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+## Keynote
+
+Presenters for Rails.
+
+### TODO
+
+* Generators.
+* Documentation.

Rakefile

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+#!/usr/bin/env rake
+require "bundler/gem_tasks"
+require "rake/testtask"
+require "appraisal"
+
+Rake::TestTask.new do |t|
+  t.libs.concat %w(keynote spec)
+  t.pattern = "spec/*_spec.rb"
+end
+
+task :default => [:test]

keynote.gemspec

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+# -*- encoding: utf-8 -*-
+require File.expand_path('../lib/keynote/version', __FILE__)
+
+Gem::Specification.new do |gem|
+  gem.authors       = ["Ryan Fitzgerald"]
+  gem.email         = ["rwfitzge@gmail.com"]
+  gem.description   = %q{TODO: Write a gem description}
+  gem.summary       = %q{TODO: Write a gem summary}
+  gem.homepage      = ""
+
+  gem.files         = `git ls-files`.split($\)
+  gem.executables   = gem.files.grep(%r{^bin/}).map{ |f| File.basename(f) }
+  gem.test_files    = gem.files.grep(%r{^(test|spec|features)/})
+  gem.name          = "keynote"
+  gem.require_paths = ["lib"]
+  gem.version       = Keynote::VERSION
+
+  gem.add_dependency 'rails', '>= 3.0.0'
+  gem.add_development_dependency 'appraisal'
+  gem.add_development_dependency 'minitest'
+  gem.add_development_dependency 'mocha'
+  gem.add_development_dependency 'pry'
+end

lib/keynote.rb

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+# encoding: UTF-8
+
+require "keynote/version"
+
+require "keynote/controller"
+require "keynote/helper"
+require "keynote/presenter"
+
+require "keynote/railtie"
+
+module Keynote
+  class << self
+    def present(view, *objects)
+      if objects[0].is_a?(Symbol)
+        name = objects.shift
+      else
+        name = presenter_name_from_object(objects[0])
+      end
+
+      presenter_from_name(name).new(view, *objects)
+    end
+
+    private
+
+    def presenter_name_from_object(object)
+      object.class.to_s.underscore
+    end
+
+    def presenter_from_name(name)
+      "#{name.to_s.camelize}Presenter".constantize
+    end
+  end
+end

lib/keynote/controller.rb

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+# encoding: UTF-8
+
+module Keynote
+  module Controller
+    def present(*args)
+      Keynote.present(view_context, *args)
+    end
+  end
+end

lib/keynote/helper.rb

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+# encoding: UTF-8
+
+module Keynote
+  module Helper
+    def present(*args)
+      Keynote.present(self, *args)
+    end
+    alias p present
+  end
+end

lib/keynote/presenter.rb

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+# encoding: UTF-8
+
+module Keynote
+  class Presenter
+    class << self
+      def presents(*objects)
+        objects.unshift :view
+        attr_reader *objects
+
+        param_list = objects.join(', ')
+        ivar_list  = objects.map { |o| "@#{o}" }.join(', ')
+
+        class_eval <<-RUBY
+          def initialize(#{param_list})  # def initialize(view, foo)
+            #{ivar_list} = #{param_list} #   @view, @foo = view, foo
+          end                            # end
+        RUBY
+      end
+    end
+
+    def initialize(view)
+      @view = view
+    end
+
+    def present(*args)
+      Keynote.present(@view, *args)
+    end
+    alias p present
+
+    def respond_to_missing?(method_name, include_private = true)
+      @view.respond_to?(method_name, true)
+    end
+
+    def method_missing(method_name, *args, &block)
+      if @view.respond_to?(method_name, true)
+        @view.send(method_name, *args, &block)
+      else
+        super
+      end
+    end
+  end
+end

lib/keynote/railtie.rb

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+# encoding: UTF-8
+
+require 'rails/railtie'
+
+module Keynote
+  class Railtie < Rails::Railtie
+    config.after_initialize do |app|
+      app.config.paths.add 'app/presenters', :eager_load => true
+    end
+
+    ActiveSupport.on_load(:action_view) do
+      include Keynote::Helper
+    end
+
+    ActiveSupport.on_load(:action_controller) do
+      include Keynote::Controller
+    end
+
+    ActiveSupport.on_load(:action_mailer) do
+      include Keynote::Controller
+    end
+  end
+end

lib/keynote/version.rb

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+# encoding: UTF-8
+
+module Keynote
+  VERSION = "0.0.1"
+end

spec/helper.rb

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+# encoding: UTF-8
+
+require 'minitest/spec'
+require 'minitest/autorun'
+require 'mocha'
+
+require 'pry'
+require 'rails'
+require 'rails/all'
+
+require 'keynote'
+
+# Initialize our test app (by Jose Valim: https://gist.github.com/1942658)
+
+class TestApp < Rails::Application
+  routes.draw do
+    get "/hello/world" => "hello#world"
+  end
+
+  config.active_support.deprecation = :log
+  config.eager_load = false
+
+  config.secret_token = 'a' * 100
+end
+
+class HelloController < ActionController::Base
+  def world
+    render :text => "Hello world!", :layout => false
+  end
+end
+
+TestApp.initialize!

spec/keynote_spec.rb

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+# encoding: UTF-8
+
+require 'helper'
+
+class NormalPresenter < Keynote::Presenter
+  presents :model
+end
+
+class Normal
+end
+
+module Keynote
+  class NestedPresenter < Keynote::Presenter
+    presents :model
+  end
+
+  class Nested
+  end
+end
+
+describe Keynote do
+  describe "with a normal presenter" do
+    let(:model) { Normal.new }
+
+    it "should find and instantiate implicitly" do
+      p = Keynote.present(:view, model)
+
+      p.wont_be_nil
+      p.must_be_instance_of NormalPresenter
+
+      p.view.must_equal  :view
+      p.model.must_equal model
+    end
+
+    it "should find and instantiate explicitly" do
+      p = Keynote.present(:view, :normal, 'hello')
+
+      p.wont_be_nil
+      p.must_be_instance_of NormalPresenter
+
+      p.view.must_equal  :view
+      p.model.must_equal 'hello'
+    end
+  end
+
+  describe "with a nested presenter" do
+    let(:model) { Keynote::Nested.new }
+
+    it "should find and instantiate implicitly" do
+      p = Keynote.present(:view, model)
+
+      p.wont_be_nil
+      p.must_be_instance_of Keynote::NestedPresenter
+
+      p.view.must_equal  :view
+      p.model.must_equal model
+    end
+
+    it "should find and instantiate explicitly" do
+      p = Keynote.present(:view, :"keynote/nested", 'hello')
+
+      p.wont_be_nil
+      p.must_be_instance_of Keynote::NestedPresenter
+
+      p.view.must_equal  :view
+      p.model.must_equal 'hello'
+    end
+  end
+end