Custom Wordpress Serializer and Path, with Specs

app/controllers/topics_controller.rb

@@ -25,7 +25,12 @@ class TopicsController < ApplicationController
   caches_action :avatar, cache_path: Proc.new {|c| "#{c.params[:post_number]}-#{c.params[:topic_id]}" }
 
   def show
-    opts = params.slice(:username_filters, :best_of, :page, :post_number, :posts_before, :posts_after, :best)
+
+    # We'd like to migrate the wordpress feed to another url. This keeps up backwards compatibility with
+    # existing installs.
+    return wordpress if params[:best].present?
+
+    opts = params.slice(:username_filters, :best_of, :page, :post_number, :posts_before, :posts_after)
     begin
       @topic_view = TopicView.new(params[:id] || params[:topic_id], current_user, opts)
     rescue Discourse::NotFound
@@ -34,8 +39,6 @@ class TopicsController < ApplicationController
       return redirect_to(topic.relative_url)
     end
 
-    raise Discourse::NotFound if @topic_view.posts.blank? && !(opts[:best].to_i > 0)
-
     anonymous_etag(@topic_view.topic) do
       redirect_to_correct_topic && return if slugs_do_not_match
       View.create_for(@topic_view.topic, request.remote_ip, current_user)
@@ -46,6 +49,21 @@ class TopicsController < ApplicationController
     canonical_url @topic_view.canonical_path
   end
 
+  def wordpress
+    params.require(:best)
+    params.require(:topic_id)
+
+    @topic_view = TopicView.new(params[:topic_id], current_user, best: params[:best].to_i)
+
+    raise Discourse::NotFound if @topic_view.posts.blank?
+
+    anonymous_etag(@topic_view.topic) do
+      wordpress_serializer = TopicViewWordpressSerializer.new(@topic_view, scope: guardian, root: false)
+      render_json_dump(wordpress_serializer)
+    end
+
+  end
+
   def destroy_timings
     PostTiming.destroy_for(current_user.id, params[:topic_id].to_i)
     render nothing: true
@@ -257,6 +275,7 @@ class TopicsController < ApplicationController
 
   def perform_show_response
     topic_view_serializer = TopicViewSerializer.new(@topic_view, scope: guardian, root: false)
+
     respond_to do |format|
       format.html do
         store_preloaded("topic_#{@topic_view.topic.id}", MultiJson.dump(topic_view_serializer))

app/serializers/basic_post_serializer.rb

@@ -0,0 +1,34 @@
+# The most basic attributes of a topic that we need to create a link for it.
+class BasicPostSerializer < ApplicationSerializer
+  attributes :id,
+             :name,
+             :username,
+             :avatar_template,
+             :created_at,
+             :cooked
+
+  def name
+    object.user.name
+  end
+
+  def username
+    object.user.username
+  end
+
+  def avatar_template
+    object.user.avatar_template
+  end
+
+  def cooked
+    if object.hidden && !scope.is_staff?
+      if scope.current_user && object.user_id == scope.current_user.id
+        I18n.t('flagging.you_must_edit')
+      else
+        I18n.t('flagging.user_must_edit')
+      end
+    else
+      object.filter_quotes(@parent_post)
+    end
+  end
+
+end

app/serializers/basic_topic_serializer.rb

@@ -1,5 +1,3 @@
-require_dependency 'age_words'
-
 # The most basic attributes of a topic that we need to create a link for it.
 class BasicTopicSerializer < ApplicationSerializer
   attributes :id, :fancy_title, :slug, :posts_count

app/serializers/post_serializer.rb

@@ -1,4 +1,4 @@
-class PostSerializer < ApplicationSerializer
+class PostSerializer < BasicPostSerializer
 
   # To pass in additional information we might need
   attr_accessor :topic_slug
@@ -8,10 +8,8 @@ class PostSerializer < ApplicationSerializer
   attr_accessor :single_post_link_counts
   attr_accessor :draft_sequence
 
-  attributes :id,
+  attributes :post_number,
-             :post_number,
              :post_type,
-             :created_at,
              :updated_at,
              :reply_count,
              :reply_to_post_number,
@@ -29,10 +27,7 @@ class PostSerializer < ApplicationSerializer
              :can_delete,
              :can_recover,
              :link_counts,
-             :cooked,
              :read,
-             :username,
-             :name,
              :user_title,
              :reply_to_user,
              :bookmarked,
@@ -40,7 +35,6 @@ class PostSerializer < ApplicationSerializer
              :actions_summary,
              :moderator?,
              :staff?,
-             :avatar_template,
              :user_id,
              :draft_sequence,
              :hidden,
@@ -57,10 +51,6 @@ class PostSerializer < ApplicationSerializer
     object.user.staff?
   end
 
-  def avatar_template
-    object.user.avatar_template
-  end
-
   def yours
     scope.user == object.user
   end
@@ -77,6 +67,10 @@ class PostSerializer < ApplicationSerializer
     scope.can_recover_post?(object)
   end
 
+  def display_username
+    object.user.name
+  end
+
   def link_counts
 
     return @single_post_link_counts if @single_post_link_counts.present?
@@ -93,18 +87,6 @@ class PostSerializer < ApplicationSerializer
     end
   end
 
-  def cooked
-    if object.hidden && !scope.is_staff?
-      if scope.current_user && object.user_id == scope.current_user.id
-        I18n.t('flagging.you_must_edit')
-      else
-        I18n.t('flagging.user_must_edit')
-      end
-    else
-      object.filter_quotes(@parent_post)
-    end
-  end
-
   def read
     @topic_view.read?(object.post_number)
   end
@@ -113,22 +95,10 @@ class PostSerializer < ApplicationSerializer
     object.score || 0
   end
 
-  def display_username
-    object.user.name
-  end
-
   def version
     object.cached_version
   end
 
-  def username
-    object.user.username
-  end
-
-  def name
-    object.user.name
-  end
-
   def user_title
     object.user.title
   end

app/serializers/topic_view_wordpress_serializer.rb

@@ -0,0 +1,32 @@
+class TopicViewWordpressSerializer < ApplicationSerializer
+
+  # These attributes will be delegated to the topic
+  attributes :id,
+             :posts_count,
+             :filtered_posts_count,
+             :posts
+
+  has_many :participants, serializer: BasicUserSerializer, embed: :objects
+  has_many :posts, serializer: BasicPostSerializer, embed: :objects
+
+  def id
+    object.topic.id
+  end
+
+  def posts_count
+    object.topic.posts_count
+  end
+
+  def filtered_posts_count
+    object.filtered_posts_count
+  end
+
+  def participants
+    object.participants.values
+  end
+
+  def posts
+    object.posts
+  end
+
+end

config/routes.rb

@@ -197,6 +197,8 @@ Discourse::Application.routes.draw do
   get 'threads/:topic_id/:post_number/avatar' => 'topics#avatar', constraints: {topic_id: /\d+/, post_number: /\d+/}
 
   # Topic routes
+  get 't/:slug/:topic_id/wordpress' => 'topics#wordpress', constraints: {topic_id: /\d+/}
+  get 't/:topic_id/wordpress' => 'topics#wordpress', constraints: {topic_id: /\d+/}
   get 't/:slug/:topic_id/best_of' => 'topics#show', defaults: {best_of: true}, constraints: {topic_id: /\d+/, post_number: /\d+/}
   get 't/:topic_id/best_of' => 'topics#show', constraints: {topic_id: /\d+/, post_number: /\d+/}
   put 't/:slug/:topic_id' => 'topics#update', constraints: {topic_id: /\d+/}

spec/components/avatar_lookup_spec.rb

@@ -1,7 +1,7 @@
 # encoding: utf-8
 
 require 'spec_helper'
-require 'avatar_lookup'
+require_dependency 'avatar_lookup'
 
 describe AvatarLookup do
   let!(:user){ Fabricate(:user) }

spec/controllers/topics_controller_spec.rb

@@ -2,6 +2,46 @@ require 'spec_helper'
 
 describe TopicsController do
 
+
+  context 'wordpress' do
+    let!(:user) { log_in(:moderator) }
+    let(:p1) { Fabricate(:post, user: user) }
+    let(:topic) { p1.topic }
+    let!(:p2) { Fabricate(:post, topic: topic, user:user )}
+
+    it "returns the JSON in the format our wordpress plugin needs" do
+      xhr :get, :wordpress, topic_id: topic.id, best: 3
+      response.should be_success
+      json = ::JSON.parse(response.body)
+      json.should be_present
+
+      # The JSON has the data the wordpress plugin needs
+      json['id'].should == topic.id
+      json['posts_count'].should == 2
+      json['filtered_posts_count'].should == 2
+
+      # Posts
+      json['posts'].size.should == 1
+      post = json['posts'][0]
+      post['id'].should == p2.id
+      post['username'].should == user.username
+      post['avatar_template'].should == user.avatar_template
+      post['name'].should == user.name
+      post['created_at'].should be_present
+      post['cooked'].should == p2.cooked
+
+      # Participants
+      json['participants'].size.should == 1
+      participant = json['participants'][0]
+      participant['id'].should == user.id
+      participant['username'].should == user.username
+      participant['avatar_template'].should == user.avatar_template
+
+
+      puts json.inspect
+    end
+  end
+
   context 'move_posts' do
     it 'needs you to be logged in' do
       lambda { xhr :post, :move_posts, topic_id: 111, title: 'blah', post_ids: [1,2,3] }.should raise_error(Discourse::NotLoggedIn)