Implement forum topic voting and tag change pruning (#3580)

app/controllers/application_controller.rb

@@ -116,7 +116,7 @@ class ApplicationController < ActionController::Base
         fmt.xml  { render template: "static/error", status: 501 }
       end
     else
-      render :template => "static/error", :status => 500
+      render :template => "static/error", :status => 500, :layout => "blank"
     end
   end
 

app/controllers/forum_post_votes_controller.rb

@@ -0,0 +1,32 @@
+class ForumPostVotesController < ApplicationController
+  respond_to :js
+  before_action :load_forum_post
+  before_action :load_vote, only: [:destroy]
+  before_action :member_only
+
+  def create
+    @forum_post_vote = @forum_post.votes.create(forum_post_vote_params)
+    respond_with(@forum_post_vote)
+  end
+
+  def destroy
+    @forum_post_vote.destroy
+    respond_with(@forum_post_vote)
+  end
+
+private
+  
+  def load_vote
+    @forum_post_vote = @forum_post.votes.where(creator_id: CurrentUser.id).first
+    raise ActiveRecord::RecordNotFound.new if @forum_post_vote.nil?
+  end
+
+  def load_forum_post
+    @forum_post = ForumPost.find(params[:forum_post_id])
+  end
+  
+  def forum_post_vote_params
+    params.fetch(:forum_post_vote, {}).permit(:score)
+  end
+
+end

app/controllers/forum_topics_controller.rb

@@ -46,6 +46,7 @@ class ForumTopicsController < ApplicationController
       @forum_topic.mark_as_read!(CurrentUser.user)
     end
     @forum_posts = ForumPost.search(:topic_id => @forum_topic.id).reorder("forum_posts.id").paginate(params[:page])
+    @original_forum_post_id = @forum_topic.original_post.id
     respond_with(@forum_topic) do |format|
       format.atom do
         @forum_posts = @forum_posts.reverse_order.includes(:creator).load