adding episode 119

episode-119/README

@@ -0,0 +1,3 @@
+Railscasts Episode #119: Session Based Model
+
+http://railscasts.com/episodes/119

episode-119/blog/.gitignore

@@ -0,0 +1,3 @@
+tmp/*
+log/*
+*.sqlite3

episode-119/blog/README

@@ -0,0 +1,4 @@
+Railscasts Example Blog App
+--
+
+To setup the app, just run `rake setup`.

episode-119/blog/Rakefile

@@ -0,0 +1,10 @@
+# Add your own tasks in files placed in lib/tasks ending in .rake,
+# for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
+
+require(File.join(File.dirname(__FILE__), 'config', 'boot'))
+
+require 'rake'
+require 'rake/testtask'
+require 'rake/rdoctask'
+
+require 'tasks/rails'

episode-119/blog/app/controllers/application.rb

@@ -0,0 +1,22 @@
+# Filters added to this controller apply to all controllers in the application.
+# Likewise, all the methods added will be available for all controllers.
+
+class ApplicationController < ActionController::Base
+  helper :all # include all helpers, all the time
+
+  # See ActionController::RequestForgeryProtection for details
+  # Uncomment the :secret if you're not using the cookie session store
+  protect_from_forgery # :secret => '9346baedc099926e71cc3a3f39613aa6'
+
+  # See ActionController::Base for details 
+  # Uncomment this to filter the contents of submitted sensitive data parameters
+  # from your application log (in this case, all fields with names like "password"). 
+  # filter_parameter_logging :password
+
+  private
+
+  def user_session
+    @user_session ||= UserSession.new(session)
+  end
+  helper_method :user_session
+end

episode-119/blog/app/controllers/articles_controller.rb

@@ -0,0 +1,45 @@
+class ArticlesController < ApplicationController
+  def index
+    @articles = Article.find(:all)
+  end
+
+  def show
+    @article = Article.find(params[:id])
+    @comment = Comment.new(:article => @article)
+  end
+
+  def new
+    @article = Article.new
+  end
+
+  def create
+    @article = Article.new(params[:article])
+    if @article.save
+      flash[:notice] = "Successfully created article."
+      redirect_to @article
+    else
+      render :action => 'new'
+    end
+  end
+
+  def edit
+    @article = Article.find(params[:id])
+  end
+
+  def update
+    @article = Article.find(params[:id])
+    if @article.update_attributes(params[:article])
+      flash[:notice] = "Successfully updated article."
+      redirect_to @article
+    else
+      render :action => 'edit'
+    end
+  end
+
+  def destroy
+    @article = Article.find(params[:id])
+    @article.destroy
+    flash[:notice] = "Successfully destroyed article."
+    redirect_to articles_url
+  end
+end

episode-119/blog/app/controllers/comments_controller.rb

@@ -0,0 +1,41 @@
+class CommentsController < ApplicationController
+  before_filter :authorize, :only => [:edit, :update]
+
+  def new
+    @comment = Comment.new
+  end
+
+  def create
+    @comment = Comment.new(params[:comment])
+    if @comment.save
+      user_session.add_comment(@comment)
+      flash[:notice] = "Successfully created comment."
+      redirect_to article_url(@comment.article_id)
+    else
+      render :action => 'new'
+    end
+  end
+
+  def edit
+    @comment = Comment.find(params[:id])
+  end
+
+  def update
+    @comment = Comment.find(params[:id])
+    if @comment.update_attributes(params[:comment])
+      flash[:notice] = "Successfully updated comment."
+      redirect_to article_url(@comment.article_id)
+    else
+      render :action => 'edit'
+    end
+  end
+
+  private
+
+  def authorize
+    unless user_session.can_edit_comment?(Comment.find(params[:id]))
+      flash[:error] = "You are no longer able to edit this comment."
+      redirect_to root_url
+    end
+  end
+end

episode-119/blog/app/helpers/application_helper.rb

@@ -0,0 +1,3 @@
+# Methods added to this helper will be available to all templates in the application.
+module ApplicationHelper
+end

episode-119/blog/app/helpers/articles_helper.rb

@@ -0,0 +1,2 @@
+module ArticlesHelper
+end

episode-119/blog/app/helpers/comments_helper.rb

@@ -0,0 +1,2 @@
+module CommentsHelper
+end

episode-119/blog/app/helpers/layout_helper.rb

@@ -0,0 +1,23 @@
+# These helper methods can be called in your template to set variables to be used in the layout
+# This module should be included in all views globally,
+# to do so you may need to add this line to your ApplicationController
+#   helper :layout
+module LayoutHelper
+  def title(page_title, show_title = true)
+    @content_for_title = page_title.to_s
+    @show_title = show_title
+  end
+
+  def show_title?
+    @show_title
+  end
+
+  def stylesheet(*args)
+    content_for(:head) { stylesheet_link_tag(*args.map(&:to_s)) }
+  end
+
+  def javascript(*args)
+    args = args.map { |arg| arg == :defaults ? arg : arg.to_s }
+    content_for(:head) { javascript_include_tag(*args) }
+  end
+end

episode-119/blog/app/models/article.rb

@@ -0,0 +1,4 @@
+class Article < ActiveRecord::Base
+  has_many :comments, :dependent => :destroy
+  validates_presence_of :name, :content
+end

episode-119/blog/app/models/comment.rb

@@ -0,0 +1,4 @@
+class Comment < ActiveRecord::Base
+  belongs_to :article
+  validates_presence_of :author_name, :content
+end

episode-119/blog/app/models/user_session.rb

@@ -0,0 +1,14 @@
+class UserSession
+  def initialize(session)
+    @session = session
+    @session[:comment_ids] ||= []
+  end
+
+  def add_comment(comment)
+    @session[:comment_ids] << comment.id
+  end
+
+  def can_edit_comment?(comment)
+    @session[:comment_ids].include?(comment.id) && comment.created_at > 15.minutes.ago
+  end
+end

episode-119/blog/app/views/articles/_form.html.erb

@@ -0,0 +1,16 @@
+<%= error_messages_for :article %>
+<% form_for @article do |f| %>
+  <p>
+    <%= f.label :name %><br />
+    <%= f.text_field :name %>
+  </p>
+  <p>
+    <%= f.label :content %><br />
+    <%= f.text_area :content %>
+  </p>
+  <p>
+    <%= f.label :author_name %><br />
+    <%= f.text_field :author_name %>
+  </p>
+  <p><%= f.submit "Submit" %></p>
+<% end %>

episode-119/blog/app/views/articles/edit.html.erb

@@ -0,0 +1,8 @@
+<% title "Edit Article" %>
+
+<%= render :partial => 'form' %>
+
+<p>
+  <%= link_to "Show", @article %> |
+  <%= link_to "View All", articles_path %>
+</p>

episode-119/blog/app/views/articles/index.html.erb

@@ -0,0 +1,11 @@
+<% title "Articles" %>
+
+<div id="articles">
+<% for article in @articles %>
+  <h2>
+    <%= link_to h(article.name), article %>
+    <span class="comments">(<%= pluralize(article.comments.size, 'comment') %>)</span>
+  </h2>
+  <div class="author">from <%=h article.author_name %> on <%= article.created_at.strftime('%b %d, %Y') %></div>
+<% end %>
+</div>

episode-119/blog/app/views/articles/new.html.erb

@@ -0,0 +1,5 @@
+<% title "New Article" %>
+
+<%= render :partial => 'form' %>
+
+<p><%= link_to "Back to List", articles_path %></p>

episode-119/blog/app/views/articles/show.html.erb

@@ -0,0 +1,15 @@
+<% title @article.name %>
+
+<p class="author"><em>from <%=h @article.author_name %></em></p>
+
+<%= simple_format(@article.content) %>
+
+<% unless @article.comments.empty? %>
+  <h2><%= pluralize(@article.comments.size, 'comment') %></h2>
+  <div id="comments">
+    <%= render :partial => @article.comments %>
+  </div>
+<% end %>
+
+<h3>Add your comment:</h3>
+<%= render :partial => 'comments/form' %>

episode-119/blog/app/views/comments/_comment.html.erb

@@ -0,0 +1,10 @@
+<div class="comment">
+  <p>
+    <strong><%= link_to_unless comment.site_url.blank?, h(comment.author_name), h(comment.site_url) %></strong>
+    <em>on <%= comment.created_at.strftime('%b %d, %Y at %H:%M') %></em>
+  </p>
+  <%= simple_format(h(comment.content)) %>
+  <% if user_session.can_edit_comment? comment %>
+    <p><%= link_to "Edit", edit_comment_path(comment) %></p>
+  <% end %>
+</div>

episode-119/blog/app/views/comments/_form.html.erb

@@ -0,0 +1,17 @@
+<%= error_messages_for :comment %>
+<% form_for @comment do |f| %>
+  <%= f.hidden_field :article_id %>
+  <p>
+    <%= f.label :author_name, 'Name' %><br />
+    <%= f.text_field :author_name %>
+  </p>
+  <p>
+    <%= f.label :site_url, 'Website URL' %><br />
+    <%= f.text_field :site_url %>
+  </p>
+  <p>
+    <%= f.label :content, 'Comment' %><br />
+    <%= f.text_area :content, :rows => '12', :cols => 35 %>
+  </p>
+  <p><%= f.submit "Submit" %></p>
+<% end %>

episode-119/blog/app/views/comments/edit.html.erb

@@ -0,0 +1,4 @@
+<% title "Edit Comment" %>
+
+<%= render :partial => 'form' %>
+

episode-119/blog/app/views/comments/new.html.erb

@@ -0,0 +1,4 @@
+<% title "New Comment" %>
+
+<%= render :partial => 'form' %>
+

episode-119/blog/app/views/layouts/application.html.erb

@@ -0,0 +1,22 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+  <head>
+    <title><%= h(yield(:title) || "Untitled") %></title>
+    <%= stylesheet_link_tag 'application' %>
+    <%= yield(:head) %>
+  </head>
+  <body>
+    <div id="container">
+      <%- flash.each do |name, msg| -%>
+        <%= content_tag :div, msg, :id => "flash_#{name}" %>
+      <%- end -%>
+      
+      <%- if show_title? -%>
+        <h1><%=h yield(:title) %></h1>
+      <%- end -%>
+      
+      <%= yield %>
+    </div>
+  </body>
+</html>