Interface out all action log data model operations

This will allow us to reimplement the logs data model against a non-database system in the near future

data/model/repositoryactioncount.py

@@ -44,30 +44,34 @@ def find_uncounted_repository():
     return None
 
 
-def count_repository_actions(to_count):
-  """ Aggregates repository actions from the LogEntry table for the last day and writes them to
-      the RepositoryActionCount table. Return True if the repository was updated and False
-      otherwise.
+def count_repository_actions(to_count, day):
+  """ Aggregates repository actions from the LogEntry table for the specified day. Returns the
+      count or None on error.
   """
-  today = date.today()
-  yesterday = today - timedelta(days=1)
-
   # TODO(LogMigrate): Remove the branch once we're back on a single table.
   def lookup_action_count(model):
     return (model
             .select()
             .where(model.repository == to_count,
-                   model.datetime >= yesterday,
-                   model.datetime < today)
+                   model.datetime >= day,
+                   model.datetime < (day + timedelta(days=1)))
             .count())
 
   actions = (lookup_action_count(LogEntry3) + lookup_action_count(LogEntry2) +
              lookup_action_count(LogEntry))
+
+  return actions
+
+
+def store_repository_action_count(repository, day, action_count):
+  """ Stores the action count for a repository for a specific day. Returns False if the
+      repository already has an entry for the specified day.
+  """
   try:
-    RepositoryActionCount.create(repository=to_count, date=yesterday, count=actions)
+    RepositoryActionCount.create(repository=repository, date=day, count=action_count)
     return True
   except IntegrityError:
-    logger.debug('Count already written for repository %s', to_count.id)
+    logger.debug('Count already written for repository %s', repository.id)
     return False