Support for Fancy topic titles

Gemfile

@@ -8,6 +8,7 @@ gem 'message_bus', path: 'vendor/gems/message_bus'
 gem 'rails_multisite', path: 'vendor/gems/rails_multisite'
 gem 'simple_handlebars_rails', path: 'vendor/gems/simple_handlebars_rails'
 
+gem 'redcarpet', require: false
 gem 'activerecord-postgres-hstore'
 gem 'acts_as_paranoid'
 gem 'active_attr' # until we get ActiveModel::Model with Rails 4

Gemfile.lock

@@ -332,6 +332,7 @@ GEM
       ffi (>= 0.5.0)
     rdoc (3.12.1)
       json (~> 1.4)
+    redcarpet (2.2.2)
     redis (3.0.2)
     redis-actionpack (3.2.3)
       actionpack (~> 3.2.3)
@@ -494,6 +495,7 @@ DEPENDENCIES
   rake
   rb-fsevent
   rb-inotify (~> 0.8.8)
+  redcarpet
   redis
   redis-rails
   rest-client

app/assets/javascripts/discourse/helpers/application_helpers.js.coffee

@@ -20,7 +20,9 @@ Handlebars.registerHelper 'shorten', (property, options) ->
 
 Handlebars.registerHelper 'topicLink', (property, options) ->
   topic = Ember.Handlebars.get(this, property, options)
-  "<a href='#{topic.get('lastReadUrl')}' class='title excerptable'>#{Handlebars.Utils.escapeExpression(topic.get('title'))}</a>"
+
+  title = topic.get('fancy_title') || topic.get('title')
+  "<a href='#{topic.get('lastReadUrl')}' class='title excerptable'>#{title}</a>"
 
 Handlebars.registerHelper 'categoryLink', (property, options) ->
   category = Ember.Handlebars.get(this, property, options)

app/assets/javascripts/discourse/templates/topic.js.handlebars

@@ -15,9 +15,9 @@
             <button class='btn btn-small' {{action cancelEdit target="view"}}><i class='icon-remove'></i></button>
           {{else}}
             <h1>
-              {{#if view.topic.title}}
+              {{#if view.topic.fancy_title}}
                 {{view Discourse.TopicStatusView topicBinding="view.topic"}}
-                <a href='{{unbound view.topic.url}}'>{{unbound view.topic.title}}</a>
+                <a href='{{unbound view.topic.url}}'>{{{unbound view.topic.fancy_title}}}</a>
               {{else}}
                 {{#if view.topic.missing}}
                   {{i18n topic.not_found.title}}

app/assets/javascripts/discourse/views/topic_view.js.coffee

@@ -280,7 +280,9 @@ window.Discourse.TopicView = Ember.View.extend Discourse.Scrolling,
   finishedEdit: ->
     if @get('editingTopic')
       topic = @get('topic')
-      topic.set('title', $('#edit-title').val())
+      new_val = $('#edit-title').val()
+      topic.set('title', new_val)
+      topic.set('fancy_title', new_val)
       topic.save()
       @set('editingTopic', false)
 

app/models/site_setting.rb

@@ -138,6 +138,8 @@ class SiteSetting < ActiveRecord::Base
 
   setting(:new_user_period_days, 2)
 
+  setting(:title_fancy_entities, true)
+
   client_setting(:educate_until_posts, 2)
 
   def self.call_discourse_hub?

app/models/topic.rb

@@ -5,6 +5,7 @@ require_dependency 'rate_limiter'
 require_dependency 'text_sentinel'
 
 class Topic < ActiveRecord::Base
+  include ActionView::Helpers
   include RateLimiter::OnCreateRecord
 
   MAX_SORT_ORDER = 2147483647
@@ -67,7 +68,10 @@ class Topic < ActiveRecord::Base
   end
 
   before_validation do
-    self.title.strip! if self.title.present?
+    if self.title.present?
+      self.title = sanitize(self.title)
+      self.title.strip! 
+    end
   end
 
   before_create do
@@ -115,6 +119,14 @@ class Topic < ActiveRecord::Base
     errors.add(:title, I18n.t(:has_already_been_used)) if finder.exists?
   end
 
+  def fancy_title    
+    return title unless SiteSetting.title_fancy_entities?
+
+    # We don't always have to require this, if fancy is disabled
+    require 'redcarpet'
+
+    Redcarpet::Render::SmartyPants.render(title)
+  end
 
   def title_quality
     # We don't care about quality on private messages

app/serializers/basic_topic_serializer.rb

@@ -3,8 +3,20 @@ require_dependency 'age_words'
 class BasicTopicSerializer < ApplicationSerializer
   include ActionView::Helpers
 
-  attributes :id, :title, :reply_count, :posts_count, :highest_post_number, :image_url, :created_at,
-             :last_posted_at, :age, :unseen, :last_read_post_number, :unread, :new_posts
+  attributes :id, 
+             :title, 
+             :fancy_title,
+             :reply_count, 
+             :posts_count, 
+             :highest_post_number, 
+             :image_url, 
+             :created_at,
+             :last_posted_at, 
+             :age, 
+             :unseen, 
+             :last_read_post_number, 
+             :unread, 
+             :new_posts
 
   def age
     AgeWords.age_words(Time.now - (object.created_at || Time.now))

app/serializers/topic_link_serializer.rb

@@ -1,6 +1,12 @@
 class TopicLinkSerializer < ApplicationSerializer
 
-  attributes :url, :title, :internal, :reflection, :clicks, :user_id
+  attributes :url, 
+             :title, 
+             :fancy_title,
+             :internal, 
+             :reflection, 
+             :clicks, 
+             :user_id
 
   def url
     object['url']
@@ -10,6 +16,10 @@ class TopicLinkSerializer < ApplicationSerializer
     object['title']
   end
 
+  def fancy_title
+    object['fancy_title']
+  end
+
   def internal
     object['internal'] == 't'
   end
@@ -25,6 +35,7 @@ class TopicLinkSerializer < ApplicationSerializer
   def user_id
     object['user_id'].to_i
   end
+
   def include_user_id?
     object['user_id'].present?
   end

app/serializers/topic_list_item_serializer.rb

@@ -1,6 +1,16 @@
 class TopicListItemSerializer < BasicTopicSerializer
 
-  attributes :views, :like_count, :visible, :pinned, :closed, :archived, :last_post_age, :starred, :has_best_of, :archetype, :slug
+  attributes :views, 
+             :like_count, 
+             :visible, 
+             :pinned, 
+             :closed, 
+             :archived, 
+             :last_post_age, 
+             :starred, 
+             :has_best_of, 
+             :archetype, 
+             :slug
 
   has_one :category
   has_many :posters, serializer: TopicPosterSerializer, embed: :objects

app/serializers/topic_view_serializer.rb

@@ -4,6 +4,7 @@ class TopicViewSerializer < ApplicationSerializer
   def self.topic_attributes
     [:id,
      :title,
+     :fancy_title,
      :posts_count,
      :created_at,
      :views,

config/locales/server.en.yml

@@ -342,12 +342,11 @@ en:
 
     email_time_window_mins: "How many minutes we wait before sending a user mail, to give them a chance to see it first."
     flush_timings_secs: "How frequently we flush timing data to the server, in seconds."
-
     max_word_length: "The maximum word length in a topic title"
     title_min_entropy: "The minimum entropy for a topic title"
     body_min_entropy: "The minimum entropy for post body"
-
     new_user_period_days: "How long a user is highlighted as being new, in days."
+    title_fancy_entities: "Convert fancy HTML entities in topic titles"
 
   notification_types:
     mentioned: "%{display_username} mentioned you in %{link}"

spec/models/topic_spec.rb

@@ -109,6 +109,41 @@ describe Topic do
 
   end
 
+  context 'html in title' do
+    let(:topic) { Fabricate(:topic, title: "<script>alert('title')</script> is my topic title" ) } 
+
+    it "should escape the HTML" do
+      topic.title.should == "is my topic title"
+    end
+
+  end
+
+  context 'fancy title' do
+    let(:topic) { Fabricate(:topic, title: "\"this topic\" -- has ``fancy stuff''" ) } 
+
+    context 'title_fancy_entities disabled' do
+      before do
+        SiteSetting.stubs(:title_fancy_entities).returns(false)
+      end
+
+      it "doesn't change the title to add entities" do
+        topic.fancy_title.should == topic.title
+      end
+    end
+
+    context 'title_fancy_entities enabled' do
+      before do
+        SiteSetting.stubs(:title_fancy_entities).returns(true)
+      end
+
+      it "converts the title to have fancy entities" do
+        topic.fancy_title.should == "&ldquo;this topic&rdquo; &ndash; has &ldquo;fancy stuff&rdquo;"
+      end
+    end
+
+
+  end
+
 
   context 'message bus' do
     it 'calls the message bus observer after create' do