clean stale sessions

app/routes/users.py

@@ -74,7 +74,17 @@ def validate_and_create_badge(input_image, filename):
         return False
 
 def is_logged_in():
-    return "pyrom_session_key" in session
+    if "pyrom_session_key" not in session:
+        return False
+    sess = Sessions.find({"key": session["pyrom_session_key"]})
+    if not sess:
+        return False
+    if sess.expires_at < int(time.time()):
+        session.clear()
+        sess.delete()
+        flash('Your session expired.;Please log in again.', InfoboxKind.INFO)
+        return False
+    return True
 
 
 def get_active_user():
@@ -83,6 +93,8 @@ def get_active_user():
     sess = Sessions.find({"key": session["pyrom_session_key"]})
     if not sess:
         return None
+    if sess.expires_at < int(time.time()):
+        return None
     return Users.find({"id": sess.user_id})