app/channels/cubism/presence_channel.rb~ in cubism-0.1.0.pre5 vs app/channels/cubism/presence_channel.rb~ in cubism-0.1.0.pre6

@@ -2,19 +2,30 @@
   include CableReady::StreamIdentifier
 
   def subscribed
     if resource.present?
       stream_for resource
-      resource.present_users.add(user.id)
+      resource.cubicle_element_ids << element_id
+      resource.excluded_user_id_for_element_id[element_id] = user.id if exclude_current_user?
     else
       reject
     end
   end
 
   def unsubscribed
     return unless resource.present?
 
+    resource.cubicle_element_ids.remove(element_id)
+    resource.excluded_user_id_for_element_id.delete(element_id)
+    disappear
+  end
+
+  def appear
+    resource.present_users.add(user.id)
+  end
+
+  def disappear
     resource.present_users.remove(user.id)
   end
 
   private
 
@@ -23,7 +34,19 @@
     GlobalID::Locator.locate(locator)
   end
 
   def user
     GlobalID::Locator.locate_signed(params[:user])
+  end
+
+  def exclude_current_user?
+    params[:exclude_current_user]
+  end
+
+  def element_id
+    params[:element_id]
+  end
+
+  def url
+    params[:url]
   end
 end