if a comment is downvoted, show the comment's user a summary of its downvote reasons

app/models/comment.rb

@@ -79,6 +79,16 @@ class Comment < ActiveRecord::Base
 
     self.story.update_comment_count!
   end
+
+  def downvote_summary
+    reasons = {}
+    Vote.where(:comment_id => self.id).each do |v|
+      reasons[v.reason] ||= 0
+      reasons[v.reason] += 1
+    end
+
+    reasons.map{|r,v| "#{Vote::COMMENT_REASONS[r]} (#{v})" }.join(", ")
+  end
   
   def is_gone?
     is_deleted?

app/views/comments/_comment.html.erb

@@ -29,10 +29,14 @@ class="comment <%= comment.current_vote ? (comment.current_vote[:vote] == 1 ?
         <%= time_ago_in_words(comment.has_been_edited?? comment.updated_at :
           comment.created_at).gsub(/^about /, "") %> ago
 
-        <span class="reason"><%= comment.current_vote &&
-          comment.current_vote[:vote] == -1 ?
-          "(#{Vote::COMMENT_REASONS[comment.current_vote[:reason]].downcase})" :
-          "" %></span>
+        <span class="reason">
+          <% if comment.downvotes > 0 && comment.user_id == @user.try(:id) %>
+            (<%= comment.downvote_summary.downcase %>)
+          <% elsif comment.current_vote && comment.current_vote[:vote] == -1 %>
+            (<%= Vote::COMMENT_REASONS[comment.current_vote[:reason]].downcase
+              %>)
+          <% end %>
+        </span>
       <% end %>
 
       <% if !comment.previewing %>