FEATURE: Display the reason for many reviewable items

Queued Posts and Users will now display a reason why they are in the
review queue.

app/serializers/reviewable_score_serializer.rb

@@ -2,7 +2,7 @@ require_dependency 'reviewable_score_type_serializer'
 
 class ReviewableScoreSerializer < ApplicationSerializer
 
-  attributes :id, :score, :agree_stats, :status, :created_at, :reviewed_at
+  attributes :id, :score, :agree_stats, :status, :reason, :created_at, :reviewed_at
   has_one :user, serializer: BasicUserSerializer, root: 'users'
   has_one :score_type, serializer: ReviewableScoreTypeSerializer
   has_one :reviewable_conversation, serializer: ReviewableConversationSerializer
@@ -16,4 +16,28 @@ class ReviewableScoreSerializer < ApplicationSerializer
     }
   end
 
+  def reason
+    return unless object.reason
+
+    if text = I18n.t("reviewables.reasons.#{object.reason}", default: nil)
+      # Create a convenient link to any site settings if the user is staff
+      settings_url = "#{Discourse.base_uri}/admin/site_settings/category/all_results?filter="
+
+      text.gsub!(/`[a-z_]+`/) do |m|
+        if scope.is_staff?
+          setting = m[1..-2]
+          "<a href=\"#{settings_url}#{setting}\">#{setting.gsub('_', ' ')}</a>"
+        else
+          m.gsub('_', ' ')
+        end
+      end
+    end
+
+    text
+  end
+
+  def include_reason?
+    reason.present?
+  end
+
 end