Make it possible to list and invalidate active sessions

calsocial/models.py

@@ -27,6 +27,7 @@ from flask_sqlalchemy import SQLAlchemy
 from sqlalchemy.orm.exc import NoResultFound
 from sqlalchemy_utils.types.choice import ChoiceType
 
+from .cache import cache
 from .utils import force_locale
 
 db = SQLAlchemy()
@@ -219,6 +220,21 @@ class User(db.Model, UserMixin):
 
         return current_app.timezone
 
+    @property
+    def session_list_key(self):
+        """The cache key of this user’s session list
+        """
+
+        return f'open_sessions:{self.id}'
+
+    @property
+    def active_sessions(self):
+        return cache.get(self.session_list_key) or []
+
+    @active_sessions.setter
+    def active_sessions(self, value):
+        cache.set(self.session_list_key, list(value))
+
     def __repr__(self):
         return f'<User {self.id}({self.username})>'