adds an RSS feed for pages/all

Gemfile.lock

@@ -23,6 +23,8 @@ PATH
   specs:
     foodsoft_wiki (0.0.1)
       acts_as_versioned
+      content_for_in_controllers
+      diffy
       rails (~> 3.2.15)
       wikicloth
 
@@ -102,6 +104,7 @@ GEM
       execjs
     coffee-script-source (1.6.3)
     commonjs (0.2.7)
+    content_for_in_controllers (0.0.2)
     coveralls (0.7.0)
       multi_json (~> 1.3)
       rest-client
@@ -112,6 +115,7 @@ GEM
     database_cleaner (1.2.0)
     debug_inspector (0.0.2)
     diff-lcs (1.2.5)
+    diffy (3.0.1)
     docile (1.1.1)
     erubis (2.7.0)
     eventmachine (1.0.3)

app/controllers/application_controller.rb

@@ -87,6 +87,18 @@ class ApplicationController < ActionController::Base
     end
   end
 
+  def authenticate_or_token(prefix, role = 'any')
+    if not params[:token].blank?
+      begin
+        TokenVerifier.new(prefix).verify(params[:token])
+      rescue ActiveSupport::MessageVerifier::InvalidSignature
+        redirect_to root_path, alert: I18n.t('application.controller.error_token')
+      end
+    else
+      authenticate(role)
+    end
+  end
+
   # Stores this controller instance as a thread local varibale to be accessible from outside ActionController/ActionView.
   def store_controller
     Thread.current[:application_controller] = self

config/locales/en.yml

@@ -271,6 +271,7 @@ en:
       error_authn: Authentication required!
       error_denied: Access denied!
       error_members_only: This action is only available to members of the group!
+      error_token: Access denied (invalid token)!
   article_categories:
     create:
       notice: Category was stored

lib/foodsoft_wiki/app/controllers/pages_controller.rb

@@ -1,6 +1,14 @@
 # encoding: utf-8
 class PagesController < ApplicationController
 
+  skip_before_filter :authenticate, :only => :all
+  before_filter :only => :all do
+    authenticate_or_token(['wiki', 'all'])
+  end
+  before_filter do
+    content_for :head, view_context.rss_meta_tag
+  end
+
   def index
     @page = Page.find_by_permalink "Home"
 
@@ -114,6 +122,10 @@ class PagesController < ApplicationController
               end
       @pages.order(order)
     end
+    respond_to do |format|
+      format.html
+      format.rss { render :layout => false }
+    end
   end
 
   def version

lib/foodsoft_wiki/app/helpers/pages_helper.rb

@@ -1,6 +1,10 @@
 module PagesHelper
   include WikiCloth
 
+  def rss_meta_tag
+    tag('link', :rel => "alternate", :type => "application/rss+xml", :title => "RSS", :href => all_pages_rss_url).html_safe
+  end
+
   def wikified_body(body, title = nil)
     render_opts = {:locale => I18n.locale} # workaround for wikicloth 0.8.0 https://github.com/nricciar/wikicloth/pull/59
     WikiCloth.new({:data => body+"\n", :link_handler => Wikilink.new, :params => {:referer => title}}).to_html(render_opts).html_safe
@@ -57,4 +61,10 @@ module PagesHelper
       Array.new
     end
   end
+
+  # return url for all_pages rss feed
+  def all_pages_rss_url(options={})
+    token = TokenVerifier.new(['wiki', 'all']).generate
+    all_pages_url({:format => 'rss', :token => token}.merge(options))
+  end
 end

lib/foodsoft_wiki/app/models/page.rb

@@ -34,6 +34,24 @@ class Page < ActiveRecord::Base
     end
   end
   
+  def diff
+    current = versions.latest
+    old = versions.where(["page_id = ? and lock_version < ?", current.page_id, current.lock_version]).order('lock_version DESC').first
+    
+    if old
+      o = ''
+      Diffy::Diff.new(old.body, current.body).each do |line|
+        case line
+        when /^\+/ then o += "#{line.chomp}<br />" unless line.chomp == "+"
+        when /^-/ then o += "#{line.chomp}<br />" unless line.chomp == "-"
+        end
+      end
+      o
+    else
+      current.body
+    end
+  end
+
   protected
 
   def update_permalink

lib/foodsoft_wiki/app/views/pages/all.html.haml

@@ -9,6 +9,7 @@
       %li= link_to t('.recent_changes'), all_pages_path(:view => 'recent_changes')
       %li= link_to t('.title_list'), all_pages_path(:view => 'title_list')
       %li= link_to t('.site_map'), all_pages_path(:view => 'site_map')
+      %li= link_to image_tag('icons/feed-icon-14x14.png', :alt => 'RSS Feed'), all_pages_rss_url
     = form_tag all_pages_path, method: :get, class: 'form-search pull-right' do
       = text_field_tag :name, params[:name], class: 'input-medium search-query',
         placeholder: t('.search.placeholder')

lib/foodsoft_wiki/app/views/pages/all.rss.builder

@@ -0,0 +1,19 @@
+xml.instruct! :xml, :version => "1.0" 
+xml.rss :version => "2.0" do
+  xml.channel do
+    xml.title FoodsoftConfig[:name] + " Wiki"
+    xml.description ""
+    xml.link FoodsoftConfig[:homepage]
+
+    for page in @pages
+      xml.item do
+        xml.title page.title
+        xml.description page.diff, :type => "html"
+        xml.author User.find(page.updated_by).display
+        xml.pubDate page.updated_at.to_s(:rfc822)
+        xml.link wiki_page_path(page.permalink)
+        xml.guid page.updated_at.to_i
+      end
+    end
+  end
+end

lib/foodsoft_wiki/foodsoft_wiki.gemspec

@@ -19,6 +19,7 @@ Gem::Specification.new do |s|
   s.add_dependency "rails", "~> 3.2.15"
   s.add_dependency 'wikicloth'
   s.add_dependency 'acts_as_versioned' # need git version, make sure that is included in foodsoft's Gemfile
-
+  s.add_dependency 'diffy'
+  s.add_dependency 'content_for_in_controllers'
   s.add_development_dependency "sqlite3"
 end

lib/foodsoft_wiki/lib/foodsoft_wiki.rb

@@ -1,5 +1,6 @@
 require 'wikicloth'
 require 'acts_as_versioned'
+require "diffy"
 require 'foodsoft_wiki/engine'
 
 module FoodsoftWiki

lib/tasks/foodsoft_setup.rake

@@ -1,3 +1,5 @@
+require 'stringio'
+
 # put in here all foodsoft tasks
 # => :environment loads the environment an gives easy access to the application
 
@@ -23,8 +25,6 @@ module Colors
 end
 include Colors
 
-require 'stringio'
-
 namespace :foodsoft do
   desc "Setup foodsoft"
   task :setup_development do
@@ -82,10 +82,11 @@ end
 
 def setup_app_config
   file = 'config/app_config.yml'
+  sample = Rails.root.join("#{file}.SAMPLE")
   return nil if skip?(file)
   
   puts yellow "Copying #{file}..."
-  %x( cp #{Rails.root.join("#{file}.SAMPLE")} #{Rails.root.join(file)} )
+  %x( cp #{sample} #{Rails.root.join(file)} )
   reminder(file)
 end
 
@@ -120,6 +121,8 @@ def start_server
   puts blue "Start your server running 'bundle exec rails s' and visit http://localhost:3000"
 end
 
+# Helper Methods
+
 def ask(question, answers = false)
   puts question
   input = STDIN.gets.chomp
@@ -149,3 +152,4 @@ def capture_stdout
 ensure
   $stdout = STDOUT
 end
+

lib/token_verifier.rb

@@ -0,0 +1,37 @@
+class TokenVerifier < ActiveSupport::MessageVerifier
+
+  def initialize(prefix)
+    super(self.class.secret)
+    @_prefix = prefix.is_a?(Array) ? prefix.join(':') : prefix.to_s
+  end
+
+  def generate(message=nil)
+    fullmessage = [FoodsoftConfig.scope, @_prefix]
+    fullmessage.append(message) unless message.nil?
+    super(fullmessage)
+  end
+
+  def verify(message)
+    r = super(message)
+    raise InvalidMessage unless r.is_a?(Array) and r.length >= 2 and r.length <= 3
+    raise InvalidScope unless r[0] == FoodsoftConfig.scope
+    raise InvalidPrefix unless r[1] == @_prefix
+    # return original message
+    if r.length > 2
+      r[2]
+    else
+      nil
+    end
+  end
+
+  class InvalidMessage < ActiveSupport::MessageVerifier::InvalidSignature; end
+  class InvalidScope < ActiveSupport::MessageVerifier::InvalidSignature; end
+  class InvalidPrefix < ActiveSupport::MessageVerifier::InvalidSignature; end
+
+  protected
+
+  def self.secret
+    Foodsoft::Application.config.secret_token
+  end
+
+end

spec/lib/token_verifier_spec.rb

@@ -0,0 +1,44 @@
+require_relative '../spec_helper'
+
+describe TokenVerifier do
+  let (:prefix) { 'xyz' }
+  let (:v) { TokenVerifier.new(prefix) }
+  let (:msg) { v.generate }
+
+  it 'validates' do
+    expect{ v.verify(msg) }.to_not raise_error
+  end
+
+  it 'validates when recreated' do
+    v2 = TokenVerifier.new(prefix)
+    expect{ v2.verify(msg) }.to_not raise_error
+  end
+
+  it 'does not validate with a different prefix' do
+    v2 = TokenVerifier.new('abc')
+    expect { v2.verify(msg) }.to raise_error(TokenVerifier::InvalidPrefix)
+  end
+
+  it 'does not validate in a different foodcoop scope' do
+    msg
+    oldscope = FoodsoftConfig.scope
+    begin
+      FoodsoftConfig.scope = Faker::Lorem.words(1)
+      v2 = TokenVerifier.new(prefix)
+      expect{ v2.verify(msg) }.to raise_error(TokenVerifier::InvalidScope)
+    ensure
+      FoodsoftConfig.scope = oldscope
+    end
+  end
+
+  it 'does not validate a random string' do
+    expect{ v.verify(Faker::Lorem.characters(100)) }.to raise_error(ActiveSupport::MessageVerifier::InvalidSignature)
+  end
+
+  it 'returns the message' do
+    data = [5, {'hi' => :there}, 'bye', []]
+    msg = v.generate(data)
+    expect(v.verify(msg)).to eq data
+  end
+
+end