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Rudimentary feed fetching and display

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This commit is contained in:
Aaron Mueller 2012-04-08 04:04:37 +02:00
parent c1194b4d3c
commit e38a1bee12
11 changed files with 104 additions and 251 deletions
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9
app/controllers/feeds_controller.rb
View file

@ -1,2 +1,11 @@
class FeedsController < ApplicationController
# Show all feeds
def index
@feeds = Feed.all
end
# Show a single feed
def show
@items = Feed.find(params[:id]).items
end
end

46
app/models/feed.rb
View file

@ -1,8 +1,50 @@
require "pp"
class Feed < ActiveRecord::Base
has_many :items
validates_uniqueness_of :url
validates_presence_of :title
scope :recent, order(:published, :asc).limit(10)
default_scope where(:has_errors => false)
scope :with_error, unscoped.where(:has_errors => true)
def fetch!
Feedzirra::Feed.fetch_and_parse(url,
:on_success => lambda do |url, feed|
feed.entries.each do |entry|
unless Item.exists?(:url => entry.url)
entry.sanitize!
items << Item.create_from_feed_entry!(entry)
end
end
by_url(url).update_attribute(:has_errors, false)
end,
:on_failure => lambda do |url, response_code, response_header, response_body|
by_url(url).update_attribute(:has_errors, true)
end
)
end
def self.import(url, *params)
Feedzirra::Feed.fetch_and_parse(url,
:on_success => lambda do |url, feed|
Feed.create!(:url => feed.feed_url, :title => feed.title).fetch!
end,
:on_failure => lambda do |url, response_code, response_header, response_body|
if params.first.include?(:force)
Feed.create!(:url => url, :has_errors => true)
end
end
)
end
def self.update_all!
Feed.all.each do |feed|
feed.fetch!
end
end
private
def by_url(feed_url)
Feed.where(:url => feed_url).first
end
end

18
app/models/item.rb
View file

@ -3,4 +3,22 @@ class Item < ActiveRecord::Base
validates_presence_of :title, :author, :content
validates_uniqueness_of :url
default_scope order("published_at DESC")
scope :recent, limit(10)
def self.create_from_feed_entry!(feed_entry)
feed_entry.sanitize!
self.create!(
:title => feed_entry.title,
:url => feed_entry.url,
:author => feed_entry.author,
:published_at => feed_entry.published,
:content => feed_entry.content
)
end
def <=>(other)
self.published_at <=> other.published_at
end
end

5
app/views/feeds/index.html.erb Normal file
View file

@ -0,0 +1,5 @@
<ul>
<% @feeds.each do |feed| %>
<li><%= link_to feed.title, feed_path(feed) %></li>
<% end %>
</ul>

7
app/views/feeds/show.html.erb Normal file
View file

@ -0,0 +1,7 @@
<% @items.each do |item| %>
<div class="item">
<h2><%= raw(item.title) %></h2>
<span><%= time_ago_in_words(item.published_at) %> by <%= item.author %></span>
<p><%= raw(item.content) %></p>
</div>
<% end %>

2
app/views/layouts/application.html.erb
View file

@ -8,6 +8,8 @@
</head>
<body>
<!-- TODO: Add feed functionality to header with form -->
<%= yield %>
</body>

1
config/routes.rb
View file

@ -12,6 +12,7 @@ FeedFu::Application.routes.draw do
# Sample resource route (maps HTTP verbs to controller actions automatically):
# resources :products
resources :feeds
# Sample resource route with options:
# resources :products do

2
db/migrate/20120407165240_create_items.rb
View file

@ -5,7 +5,7 @@ class CreateItems < ActiveRecord::Migration
t.string :url
t.string :author
t.text :content
t.time :published
t.datetime :published_at
t.references :feed

9
db/migrate/20120407180851_add_error_field.rb Normal file
View file

@ -0,0 +1,9 @@
class AddErrorField < ActiveRecord::Migration
def up
add_column :feeds, :has_errors, :boolean, :default => false
end
def down
remove_column :feeds, :has_errors
end
end

5
db/schema.rb
View file

@ -11,13 +11,14 @@
#
# It's strongly recommended to check this file into your version control system.
ActiveRecord::Schema.define(:version => 20120407165240) do
ActiveRecord::Schema.define(:version => 20120407180851) do
create_table "feeds", :force => true do |t|
t.string "url"
t.string "title"
t.datetime "created_at", :null => false
t.datetime "updated_at", :null => false
t.boolean "has_errors", :default => false
end
create_table "items", :force => true do |t|
@ -25,7 +26,7 @@ ActiveRecord::Schema.define(:version => 20120407165240) do
t.string "url"
t.string "author"
t.text "content"
t.time "published"
t.datetime "published_at"
t.integer "feed_id"
t.datetime "created_at", :null => false
t.datetime "updated_at", :null => false

241
public/index.html
View file

@ -1,241 +0,0 @@
<!DOCTYPE html>
<html>
<head>
<title>Ruby on Rails: Welcome aboard</title>
<style type="text/css" media="screen">
body {
margin: 0;
margin-bottom: 25px;
padding: 0;
background-color: #f0f0f0;
font-family: "Lucida Grande", "Bitstream Vera Sans", "Verdana";
font-size: 13px;
color: #333;
}
h1 {
font-size: 28px;
color: #000;
}
a {color: #03c}
a:hover {
background-color: #03c;
color: white;
text-decoration: none;
}
#page {
background-color: #f0f0f0;
width: 750px;
margin: 0;
margin-left: auto;
margin-right: auto;
}
#content {
float: left;
background-color: white;
border: 3px solid #aaa;
border-top: none;
padding: 25px;
width: 500px;
}
#sidebar {
float: right;
width: 175px;
}
#footer {
clear: both;
}
#header, #about, #getting-started {
padding-left: 75px;
padding-right: 30px;
}
#header {
background-image: url("assets/rails.png");
background-repeat: no-repeat;
background-position: top left;
height: 64px;
}
#header h1, #header h2 {margin: 0}
#header h2 {
color: #888;
font-weight: normal;
font-size: 16px;
}
#about h3 {
margin: 0;
margin-bottom: 10px;
font-size: 14px;
}
#about-content {
background-color: #ffd;
border: 1px solid #fc0;
margin-left: -55px;
margin-right: -10px;
}
#about-content table {
margin-top: 10px;
margin-bottom: 10px;
font-size: 11px;
border-collapse: collapse;
}
#about-content td {
padding: 10px;
padding-top: 3px;
padding-bottom: 3px;
}
#about-content td.name {color: #555}
#about-content td.value {color: #000}
#about-content ul {
padding: 0;
list-style-type: none;
}
#about-content.failure {
background-color: #fcc;
border: 1px solid #f00;
}
#about-content.failure p {
margin: 0;
padding: 10px;
}
#getting-started {
border-top: 1px solid #ccc;
margin-top: 25px;
padding-top: 15px;
}
#getting-started h1 {
margin: 0;
font-size: 20px;
}
#getting-started h2 {
margin: 0;
font-size: 14px;
font-weight: normal;
color: #333;
margin-bottom: 25px;
}
#getting-started ol {
margin-left: 0;
padding-left: 0;
}
#getting-started li {
font-size: 18px;
color: #888;
margin-bottom: 25px;
}
#getting-started li h2 {
margin: 0;
font-weight: normal;
font-size: 18px;
color: #333;
}
#getting-started li p {
color: #555;
font-size: 13px;
}
#sidebar ul {
margin-left: 0;
padding-left: 0;
}
#sidebar ul h3 {
margin-top: 25px;
font-size: 16px;
padding-bottom: 10px;
border-bottom: 1px solid #ccc;
}
#sidebar li {
list-style-type: none;
}
#sidebar ul.links li {
margin-bottom: 5px;
}
.filename {
font-style: italic;
}
</style>
<script type="text/javascript">
function about() {
info = document.getElementById('about-content');
if (window.XMLHttpRequest)
{ xhr = new XMLHttpRequest(); }
else
{ xhr = new ActiveXObject("Microsoft.XMLHTTP"); }
xhr.open("GET","rails/info/properties",false);
xhr.send("");
info.innerHTML = xhr.responseText;
info.style.display = 'block'
}
</script>
</head>
<body>
<div id="page">
<div id="sidebar">
<ul id="sidebar-items">
<li>
<h3>Browse the documentation</h3>
<ul class="links">
<li><a href="http://guides.rubyonrails.org/">Rails Guides</a></li>
<li><a href="http://api.rubyonrails.org/">Rails API</a></li>
<li><a href="http://www.ruby-doc.org/core/">Ruby core</a></li>
<li><a href="http://www.ruby-doc.org/stdlib/">Ruby standard library</a></li>
</ul>
</li>
</ul>
</div>
<div id="content">
<div id="header">
<h1>Welcome aboard</h1>
<h2>You&rsquo;re riding Ruby on Rails!</h2>
</div>
<div id="about">
<h3><a href="rails/info/properties" onclick="about(); return false">About your application&rsquo;s environment</a></h3>
<div id="about-content" style="display: none"></div>
</div>
<div id="getting-started">
<h1>Getting started</h1>
<h2>Here&rsquo;s how to get rolling:</h2>
<ol>
<li>
<h2>Use <code>rails generate</code> to create your models and controllers</h2>
<p>To see all available options, run it without parameters.</p>
</li>
<li>
<h2>Set up a default route and remove <span class="filename">public/index.html</span></h2>
<p>Routes are set up in <span class="filename">config/routes.rb</span>.</p>
</li>
<li>
<h2>Create your database</h2>
<p>Run <code>rake db:create</code> to create your database. If you're not using SQLite (the default), edit <span class="filename">config/database.yml</span> with your username and password.</p>
</li>
</ol>
</div>
</div>
<div id="footer">&nbsp;</div>
</div>
</body>
</html>