add deletion column to promotion report

app/logical/reports/user_promotions.rb

@@ -13,6 +13,10 @@ module Reports
       def confidence_interval_for(n)
         Reports::UserPromotions.confidence_interval_for(user, n)
       end
+
+      def deletion_confidence_interval
+        Reports::UserPromotions.deletion_confidence_interval(user)
+      end
     end
 
     def self.confidence_interval_for(user, n)
@@ -21,6 +25,12 @@ module Reports
       ci_lower_bound(up_votes, total_votes, 0.95)
     end
 
+    def self.deletion_confidence_interval_for(user)
+      deletions = Post.where(:uploader_id => user.id, :is_deleted => true).count
+      total = Post.where(:uploader_id => user.id).count
+      ci_lower_bound(deletions, total, 0.95)
+    end
+
     def self.ci_lower_bound(pos, n, confidence)
       if n == 0
         return 0

app/views/reports/user_promotions.html.erb

@@ -13,6 +13,7 @@
           <th data-sort="string">Age</th>
           <th data-sort="int">score:3+</th>
           <th data-sort="int">score:6+</th>
+          <th data-sort="int">deletion</th>
         </tr>
       </thead>
       <tbody>
@@ -26,6 +27,7 @@
                 <td data-sort-value="<%= user.created_at.to_formatted_s(:db) %>"><%= time_ago_in_words user.created_at %></td>
                 <td><%= number_to_percentage user.confidence_interval_for(3), :precision => 0 %></td>
                 <td><%= number_to_percentage user.confidence_interval_for(6), :precision => 0 %></td>
+                <td><%= number_to_percentage user.deletion_confidence_interval, :precision => 0 %></td>
               </tr>
             <% end %>
           <% end %>

config/initializers/assets.rb

@@ -0,0 +1 @@
+Rails.application.config.assets.precompile += %w( stupidtable.js )