data.model.repository: add app methods

data/model/repository.py

@@ -58,6 +58,14 @@ def get_repository(namespace_name, repository_name, kind_filter=None):
     return None
 
 
+def get_or_create_repository(namespace, name, creating_user, visibility='private',
+                             repo_kind='image'):
+  repo = get_repository(namespace, name, repo_kind)
+  if repo is None:
+    repo = create_repository(namespace, name, creating_user, visibility, repo_kind)
+  return repo
+
+
 def purge_repository(namespace_name, repository_name):
   """ Completely delete all traces of the repository. Will return True upon
       complete success, and False upon partial or total failure. Garbage
@@ -339,6 +347,20 @@ def get_visible_repositories(username, namespace=None, repo_kind='image', includ
   return query
 
 
+def get_app_repository(namespace_name, repository_name):
+  """ Find an application repository. """
+  try:
+    return _basequery.get_existing_repository(namespace_name, repository_name,
+                                              kind_filter='application')
+  except Repository.DoesNotExist:
+    return None
+
+
+def get_app_search(lookup, username=None, limit=50):
+  return get_filtered_matching_repositories(lookup, filter_username=username,
+                                            repo_kind='application', offset=0, limit=limit)
+
+
 def get_filtered_matching_repositories(lookup_value, filter_username=None, repo_kind='image',
                                        offset=0, limit=25):
   """ Returns an iterator of all repositories matching the given lookup value, with optional