ParkinT/Article for RubySource.com

## application.html.erb
<!-- app/views/layouts/application.html.erb -->
<!DOCTYPE html>
<head>
  <title>Your Own User Zero Effort Reset</title>
  <%= stylesheet_link_tag "application", :media => "all" %>
  <%= javascript_include_tag "application" %>
  <%= csrf_meta_tags %>

</head>
<body>
<ul id="nav">
 <% unless user_signed_in? %>
  <li><%= link_to "Log In", sign_in_path %></li>
  <li><%= link_to "Register", sign_up_path %></li>
 <% end %>
    <% if user_signed_in? %>
  <li><%= link_to "Log Out", log_out_path %></li>
 <% end %>
</ul>

<%- flash.each do |key, msg| -%>
  <div id="<%= key %>">
    <p style="float:right;"><a href="#">X</a></p>
    <p><%= msg %></p>
    <div class="clear"></div>
  </div>
<%- end -%>

<%= yield %>

<div id="wrap"></div>
<div id="foot">Application developed by Thom Parkin / Websembly, LLC</div>

</body>
</html>

## application_controller.rb
# app/controllers/application_controller.rb
class ApplicationController < ActionController::Base
  protect_from_forgery

private

def authenticate_user!
  if current_user.nil?
    redirect_to login_url, :alert => "You must first log in to access this page"
  end
end

def current_user
 begin
     @current_user ||= session[:user_id] && User.find(session[:user_id])
 rescue
 end
end

def user_signed_in?
 begin
  User.where("id=?", session[:user_id]).exists?
 rescue
  false
 end
end

  helper_method :current_user, :user_signed_in?, :authenticate_user?

end

## Article for RubySource.com
Supporting code for "Nitrous.IO: Rails Development in the Cloud" which demonstrates Nitrous.io for Ruby on Rails development without regard to hardware or physical location.

Full article at http://www.sitepoint.com/nitrous-io-rails-development-cloud/

## Gemfile
#Gemfile
source 'https://rubygems.org'

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '4.0.0'

# Use sqlite3 as the database for Active Record
gem 'sqlite3'

# Use SCSS for stylesheets
gem 'sass-rails', '~> 4.0.0'

# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'

# Use CoffeeScript for .js.coffee assets and views
gem 'coffee-rails', '~> 4.0.0'

# See https://github.com/sstephenson/execjs#readme for more supported runtimes
# gem 'therubyracer', platforms: :ruby

# Use jquery as the JavaScript library
gem 'jquery-rails'

# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
gem 'turbolinks'

# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 1.2'

group :doc do
  # bundle exec rake doc:rails generates the API under doc/api.
  gem 'sdoc', require: false
end

# Use ActiveModel has_secure_password
gem 'bcrypt-ruby', '~> 3.0.0'

gem 'protected_attributes'

# Use unicorn as the app server
# gem 'unicorn'

# Use Capistrano for deployment
gem 'capistrano', group: :development

# Use debugger
# gem 'debugger', group: [:development, :test]

## index.html.erb
<!-- app/views/sessions/index.html.erb -->
<h1>Landing Page</h1>
<h3>THIS SPACE FOR RENT</h3>
<p>Visit <a href="http://www.rubysource.com">RubySource</a> for great articles and tips on Ruby Development.</p>

## routes.rb
# app/config/routes.rb
Youzer::Application.routes.draw do
  get "users/new"
  get "users/create"
  get "sessions/index"
  get "sessions/new"
  get "sessions/create"
  get "sessions/logout"
  get "sessions/destroy"

  match 'sign_in' => 'sessions#new', :via => :get
  match 'sign_up' => 'users#new', :via => :get

  match 'log_out' => 'sessions#destroy', :via => :get

  resources :sessions
  resources :users

  root :to => 'sessions#index'
end

## sessions new.html.erb
<!-- app/views/sessions/new.html.erb -->
<%= form_tag sessions_path do %>
<h3>Log in</h3>
  <div class="field">
    <%= label_tag :email %>
    <%= text_field_tag :email, params[:email] %>
  </div>
  <div class="field">
    <%= label_tag :password %>
    <%= password_field_tag :password %>
  </div>
  <div class="actions"><%= submit_tag "Log in" %></div>
<% end %>

## sessions_controller.rb
# app/controllers/sessions_controller.rb
class SessionsController < ApplicationController
  def index
  end

  def new
  end

  def create
    user = User.find_by_email(params[:email].downcase)
    if user && user.authenticate(params[:password])
      session[:user_id] = user.id
      redirect_to root_url, :notice => "Welcome #{user.name}"  #you may wish to modify this redirect
    else
      flash.now.alert = "Invalid email or password"
      render "new"
    end
  end

  def logout
    self.destroy
  end

  def destroy
    session[:user_id] = nil
    redirect_to root_url, :notice => "Goodbye"
  end

end

## Shell Commands
rails new youzer

cd youzer

rails g model User name:string email:string password:string password_confirmation:string password_digest:string
rails g controller Users new create
rails g controller Sessions index new create logout destroy
============================================================
RAILS_ENV=development && bundle exec rake db:create
RAILS_ENV=development && bundle exec rake db:migrate

## user.rb
# app/models/user.rb
class User < ActiveRecord::Base
  attr_accessible :email, :name, :password, :password_confirmation, :password_digest
  has_secure_password   #This is the Rails 3 'magic'
  validates_presence_of :password, :on => :create
end

## users new.html.erb
<!-- app/views/users/new.html.erb -->
<%= form_for @user do |f| %>
 <% if @user.errors.any? %>
   <div class="error_messages">
    <h2>Form is invalid</h2>
    <ul>
     <% for message in @user.errors.full_messages %>
       <li><%= message %></li>
     <% end %>
    </ul>
   </div>
 <% end %>
<h3>Sign Up</h3>
 <div class="field">
  <%= f.label :name %>
  <%= f.text_field :name %>
 </div>
 <div class="field">
  <%= f.label :email %>
  <%= f.text_field :email %>
 </div>
 <div class="field">
  <%= f.label :password %>
  <%= f.password_field :password %>
 </div>
 <div class="field">
  <%= f.label :password_confirmation %>
  <%= f.password_field :password_confirmation %>
 </div>
 <div class="actions"><%= f.submit "Register" %></div>
<% end %>

## users_controller.rb
# app/controllers/users_controller.rb
class UsersController < ApplicationController
 def new
  @user = User.new
 end

  def create
  @user = User.new(params[:user])
  @user.name = params[:user][:name]
  @user.email = (params[:user][:email]).downcase
  if @user.save
        session[:user_id] = @user.id
        current_user #call in application helper
   redirect_to :root, :notice => "Registered!"  #you may wish to modify this redirect
  else
   render "new"
  end
  rescue Exception => ex
    logger.warn('ERROR: ' + ex.message)
    flash.now[:error] = 'There was an error creating the user.'
    render :action => 'new'
 end
end
	<!-- app/views/layouts/application.html.erb -->
	<!DOCTYPE html>
	<head>
	<title>Your Own User Zero Effort Reset</title>
	<%= stylesheet_link_tag "application", :media => "all" %>
	<%= javascript_include_tag "application" %>
	<%= csrf_meta_tags %>

	</head>
	<body>
	<ul id="nav">
	<% unless user_signed_in? %>
	<li><%= link_to "Log In", sign_in_path %></li>
	<li><%= link_to "Register", sign_up_path %></li>
	<% end %>
	<% if user_signed_in? %>
	<li><%= link_to "Log Out", log_out_path %></li>
	<% end %>
	</ul>

	<%- flash.each do \|key, msg\| -%>
	<div id="<%= key %>">
	<p style="float:right;"><a href="#">X</a></p>
	<p><%= msg %></p>
	<div class="clear"></div>
	</div>
	<%- end -%>

	<%= yield %>

	<div id="wrap"></div>
	<div id="foot">Application developed by Thom Parkin / Websembly, LLC</div>

	</body>
	</html>
	# app/controllers/application_controller.rb
	class ApplicationController < ActionController::Base
	protect_from_forgery

	private

	def authenticate_user!
	if current_user.nil?
	redirect_to login_url, :alert => "You must first log in to access this page"
	end
	end

	def current_user
	begin
	@current_user \|\|= session[:user_id] && User.find(session[:user_id])
	rescue
	end
	end

	def user_signed_in?
	begin
	User.where("id=?", session[:user_id]).exists?
	rescue
	false
	end
	end

	helper_method :current_user, :user_signed_in?, :authenticate_user?

	end
	Supporting code for "Nitrous.IO: Rails Development in the Cloud" which demonstrates Nitrous.io for Ruby on Rails development without regard to hardware or physical location.

	Full article at http://www.sitepoint.com/nitrous-io-rails-development-cloud/
	#Gemfile
	source 'https://rubygems.org'

	# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
	gem 'rails', '4.0.0'

	# Use sqlite3 as the database for Active Record
	gem 'sqlite3'

	# Use SCSS for stylesheets
	gem 'sass-rails', '~> 4.0.0'

	# Use Uglifier as compressor for JavaScript assets
	gem 'uglifier', '>= 1.3.0'

	# Use CoffeeScript for .js.coffee assets and views
	gem 'coffee-rails', '~> 4.0.0'

	# See https://github.com/sstephenson/execjs#readme for more supported runtimes
	# gem 'therubyracer', platforms: :ruby

	# Use jquery as the JavaScript library
	gem 'jquery-rails'

	# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
	gem 'turbolinks'

	# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
	gem 'jbuilder', '~> 1.2'

	group :doc do
	# bundle exec rake doc:rails generates the API under doc/api.
	gem 'sdoc', require: false
	end

	# Use ActiveModel has_secure_password
	gem 'bcrypt-ruby', '~> 3.0.0'

	gem 'protected_attributes'

	# Use unicorn as the app server
	# gem 'unicorn'

	# Use Capistrano for deployment
	gem 'capistrano', group: :development

	# Use debugger
	# gem 'debugger', group: [:development, :test]
	<!-- app/views/sessions/index.html.erb -->
	<h1>Landing Page</h1>
	<h3>THIS SPACE FOR RENT</h3>
	<p>Visit <a href="http://www.rubysource.com">RubySource</a> for great articles and tips on Ruby Development.</p>
	# app/config/routes.rb
	Youzer::Application.routes.draw do
	get "users/new"
	get "users/create"
	get "sessions/index"
	get "sessions/new"
	get "sessions/create"
	get "sessions/logout"
	get "sessions/destroy"

	match 'sign_in' => 'sessions#new', :via => :get
	match 'sign_up' => 'users#new', :via => :get

	match 'log_out' => 'sessions#destroy', :via => :get

	resources :sessions
	resources :users

	root :to => 'sessions#index'
	end
	<!-- app/views/sessions/new.html.erb -->
	<%= form_tag sessions_path do %>
	<h3>Log in</h3>
	<div class="field">
	<%= label_tag :email %>
	<%= text_field_tag :email, params[:email] %>
	</div>
	<div class="field">
	<%= label_tag :password %>
	<%= password_field_tag :password %>
	</div>
	<div class="actions"><%= submit_tag "Log in" %></div>
	<% end %>
	# app/controllers/sessions_controller.rb
	class SessionsController < ApplicationController
	def index
	end

	def new
	end

	def create
	user = User.find_by_email(params[:email].downcase)
	if user && user.authenticate(params[:password])
	session[:user_id] = user.id
	redirect_to root_url, :notice => "Welcome #{user.name}" #you may wish to modify this redirect
	else
	flash.now.alert = "Invalid email or password"
	render "new"
	end
	end

	def logout
	self.destroy
	end

	def destroy
	session[:user_id] = nil
	redirect_to root_url, :notice => "Goodbye"
	end

	end
	rails new youzer

	cd youzer

	rails g model User name:string email:string password:string password_confirmation:string password_digest:string
	rails g controller Users new create
	rails g controller Sessions index new create logout destroy
	============================================================
	RAILS_ENV=development && bundle exec rake db:create
	RAILS_ENV=development && bundle exec rake db:migrate
	# app/models/user.rb
	class User < ActiveRecord::Base
	attr_accessible :email, :name, :password, :password_confirmation, :password_digest
	has_secure_password #This is the Rails 3 'magic'
	validates_presence_of :password, :on => :create
	end