FIX: `nofollow` was being added during post processing when it shouldn't

app/models/post.rb

@@ -188,6 +188,14 @@ class Post < ActiveRecord::Base
     end
   end
 
+  def add_nofollow?
+    return user.blank? || SiteSetting.tl3_links_no_follow? || !user.has_trust_level?(TrustLevel[3])
+  end
+
+  def omit_nofollow?
+    return !add_nofollow?
+  end
+
   def cook(*args)
     # For some posts, for example those imported via RSS, we support raw HTML. In that
     # case we can skip the rendering pipeline.
@@ -203,7 +211,7 @@ class Post < ActiveRecord::Base
       post_user = self.user
       cloned[1][:user_id] = post_user.id if post_user
 
-      cooked = if !post_user || SiteSetting.tl3_links_no_follow || !post_user.has_trust_level?(TrustLevel[3])
+      cooked = if add_nofollow?
                  post_analyzer.cook(*args)
                else
                  # At trust level 3, we don't apply nofollow to links

lib/cooked_post_processor.rb

@@ -7,6 +7,8 @@ require_dependency 'pretty_text'
 class CookedPostProcessor
   include ActionView::Helpers::NumberHelper
 
+  attr_reader :cooking_options
+
   def initialize(post, opts={})
     @dirty = false
     @opts = opts
@@ -17,6 +19,7 @@ class CookedPostProcessor
     @cooking_options = post.cooking_options || opts[:cooking_options] || {}
     @cooking_options[:topic_id] = post.topic_id
     @cooking_options = @cooking_options.symbolize_keys
+    @cooking_options[:omit_nofollow] = true if post.omit_nofollow?
 
     analyzer = post.post_analyzer
     @doc = Nokogiri::HTML::fragment(analyzer.cook(post.raw, @cooking_options))

spec/components/cooked_post_processor_spec.rb

@@ -20,6 +20,26 @@ describe CookedPostProcessor do
 
   end
 
+  context "cooking options" do
+    context "regular user" do
+      let(:post) { Fabricate(:post) } 
+
+      it "doesn't omit nofollow" do
+        cpp = CookedPostProcessor.new(post)
+        expect(cpp.cooking_options[:omit_nofollow]).to eq(nil)
+      end
+    end
+
+    context "admin user" do
+      let(:post) { Fabricate(:post, user: Fabricate(:admin) ) }
+
+      it "omits nofollow" do
+        cpp = CookedPostProcessor.new(post)
+        expect(cpp.cooking_options[:omit_nofollow]).to eq(true)
+      end
+    end
+  end
+
   context ".keep_reverse_index_up_to_date" do
 
     let(:post) { build(:post_with_uploads, id: 123) }