WIP modified CommentsController#index

app/controllers/admin/comments_controller.rb

@@ -3,7 +3,17 @@ module Admin
     load_and_authorize_resource
 
     def index
-      @comments = Comment.accessible_by(current_ability).joins('INNER JOIN events ON commentable_id = events.id').order('events.title', 'comments.created_at DESC').group_by{ |comment| comment.commentable.conference }.map {|conference, comments| [conference, comments.group_by{|comment| comment.commentable}]}.to_h
+      @comments = grouped_comments(accessible_ordered_comments)
+      @unread_comments = grouped_comments(accessible_ordered_comments.find_since_last_login(current_user))
+      @posted_comments = grouped_comments(accessible_ordered_comments.find_comments_by_user(current_user))
+    end
+
+    def accessible_ordered_comments
+      Comment.accessible_by(current_ability).joins('INNER JOIN events ON commentable_id = events.id').order('events.title', 'comments.created_at DESC')
+    end
+
+    def grouped_comments(comments)
+      comments.group_by{ |comment| comment.commentable.conference }.map {|conference, comments| [conference, comments.group_by{|comment| comment.commentable}]}.to_h
     end
   end
 end

app/helpers/application_helper.rb

@@ -280,7 +280,6 @@ module ApplicationHelper
   end
 
   def unread_notifications(user)
-    available_conferences_ids = Conference.with_roles([:admin, :organizer, :cfp], user).pluck(:id)
-    Comment.find_since_last_login(user).where(commentable_type: 'Event', commentable_id: Event.where(conference_id: available_conferences_ids))
+    Comment.accessible_by(current_ability).find_since_last_login(current_user).limit(5)
   end
 end

app/views/admin/comments/_posted_comments.html.haml

@@ -1,2 +1,10 @@
 .panel.well
- Some text
+  %ul
+  - @posted_comments.each do |conference, events|
+    %i.li= conference.title
+    - events.each do |event, comments|
+      %b.li= event.title
+      - comments.each do |comment|
+        %li= comment.body
+        %li= comment.user.name
+        %li= comment.created_at

app/views/admin/comments/_unread_comments.html.haml

@@ -1,2 +1,10 @@
 .panel.well
-  Some text
+  %ul
+  - @unread_comments.each do |conference, events|
+    %i.li= conference.title
+    - events.each do |event, comments|
+      %b.li= event.title
+      - comments.each do |comment|
+        %li= comment.body
+        %li= comment.user.name
+        %li= comment.created_at