Flesh out the API for managing permissions.

data/model.py

@@ -200,3 +200,37 @@ def get_user_repo_permissions(user, repository):
   select = RepositoryPermission.select()
   return select.where(RepositoryPermission.user == user,
                       RepositoryPermission.repository == repository)
+
+
+def get_user_reponame_permission(user_obj, namespace_name, repository_name):
+  repo = Repository.get(Repository.name == repository_name,
+                        Repository.namespace == namespace_name)
+  perm = RepositoryPermission.get(RepositoryPermission.user == user_obj,
+                                  RepositoryPermission.repository == repo)
+  return perm
+
+
+def set_user_repo_permission(user_obj, namespace_name, repository_name,
+                             role_name):
+  repo = Repository.get(Repository.name == repository_name,
+                        Repository.namespace == namespace_name)
+  new_role = Role.get(Role.name == role_name)
+
+  # Fetch any existing permission for this user on the repo
+  try:
+    perm = RepositoryPermission.get(RepositoryPermission.user == user_obj,
+                                    RepositoryPermission.repository == repo)
+    perm.role = new_role
+    perm.save()
+    return perm
+  except RepositoryPermission.DoesNotExist:
+    new_perm = RepositoryPermission.create(repository=repo, user=user_obj,
+                                           role=new_role)
+    return new_perm
+
+def delete_user_permission(user_obj, namespace_name, repository_name):
+  repo = Repository.get(Repository.name == repository_name,
+                        Repository.namespace == namespace_name)
+  perm = RepositoryPermission.get(RepositoryPermission.user == user_obj,
+                                  RepositoryPermission.repository == repo)
+  perm.delete_instance()