auth: Fetch all of a user's roles.

* gn3/auth/authorisation/roles.py: Fetch roles from DB
* gn3/auth/authorisation/views.py: Provide API endpoint for user roles
* tests/unit/auth/test_roles.py: Tests to check fetching roles works correctly

Fix linting and typing issues in the following files:

* gn3/auth/authentication/oauth2/resource_server.py
* gn3/auth/authentication/oauth2/views.py
* tests/unit/auth/fixtures/oauth2_client_fixtures.py

1 files changed, 15 insertions, 0 deletions

diff --git a/gn3/auth/authorisation/views.py b/gn3/auth/authorisation/views.py
new file mode 100644
index 0000000..2481633
--- /dev/null
+++ b/gn3/auth/authorisation/views.py
@@ -0,0 +1,15 @@
+"""Endpoints for the authorisation stuff."""
+from flask import jsonify, current_app
+
+from gn3.auth import db
+from .roles import user_roles as _user_roles
+from ..authentication.oauth2.views import oauth2
+from ..authentication.oauth2.resource_server import require_oauth
+
+@oauth2.route("/user-roles")
+@require_oauth
+def user_roles():
+    """Return the roles assigned to the user."""
+    with require_oauth.acquire("role") as token:
+        with db.connection(current_app.config["AUTH_DB"]) as conn:
+            return jsonify(_user_roles(conn, token.user))