Display banners when a user is no more a BDE or Kfet member

apps/member/templatetags/memberinfo.py

@@ -0,0 +1,22 @@
+# Copyright (C) 2018-2020 by BDE ENS Paris-Saclay
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+from datetime import date
+
+from django import template
+from django.contrib.auth.models import User
+
+from ..models import Club, Membership
+
+
+def is_member(user, club):
+    if isinstance(user, str):
+        club = User.objects.get(username=user)
+    if isinstance(club, str):
+        club = Club.objects.get(name=club)
+    return Membership.objects\
+        .filter(user=user, club=club, date_start__lte=date.today(), date_end__gte=date.today()).exists()
+
+
+register = template.Library()
+register.filter("is_member", is_member)