Use count instead of action

In order to be able to combine multiple log entries (and of different
types) into one, we now set the object count instead of an action verb
when logging an operation.

lib/remote_storage/riak.rb

@@ -106,8 +106,8 @@ module RemoteStorage
 
       object.store
 
-      log_action = object_exists ? "update" : "create"
-      log_operation(user, directory, log_action, new_object_size, existing_object_size)
+      log_count = object_exists ? 0 : 1
+      log_operation(user, directory, log_count, new_object_size, existing_object_size)
 
       update_all_directory_objects(user, directory, timestamp)
 
@@ -127,7 +127,7 @@ module RemoteStorage
       riak_response = data_bucket.delete("#{user}:#{directory}:#{key}")
 
       if riak_response[:code] != 404
-        log_operation(user, directory, "delete", 0, existing_object_size)
+        log_operation(user, directory, -1, 0, existing_object_size)
       end
 
       timestamp = (Time.now.to_f * 1000).to_i
@@ -161,11 +161,11 @@ module RemoteStorage
       object
     end
 
-    def log_operation(user, directory, action, new_size=0, old_size=0)
+    def log_operation(user, directory, count, new_size=0, old_size=0)
       log_entry = opslog_bucket.new
       log_entry.content_type = "application/json"
       log_entry.data = {
-        "action" => action,
+        "count" => count,
         "size" => (-old_size + new_size),
         "category" => extract_category(directory)
       }