Start of activity stream.

attract/subquery.py

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+"""Sub-query stuff, for things we would otherwise let Eve embed (but don't want to).
+
+Uses app.cache.memoize() to cache the results. However, since this decorator needs
+to run in Flask Application context, it is manually applied in setup_app().
+"""
+
+import pillarsdk
+from pillar.web.system_util import pillar_api
+
+
+def get_user_info(user_id):
+    """Returns email & full name of the user.
+
+    Only returns those two fields, so the return value is the same
+    for authenticated & non-authenticated users, which is why we're
+    allowed to cache it globally.
+
+    Returns None when the user cannot be found.
+    """
+
+    if user_id is None:
+        return None
+
+    user = pillarsdk.User.find(user_id, api=pillar_api())
+    if not user:
+        return user
+
+    return {'email': user.email,
+            'full_name': user.full_name}
+
+
+def setup_app(app):
+    global get_user_info
+
+    decorator = app.cache.memoize(timeout=300, make_name='%s.get_user_info' % __name__)
+    get_user_info = decorator(get_user_info)