Add announcements app

marietje/announcements/admin.py

@@ -0,0 +1,16 @@
+from django.contrib import admin
+
+from announcements.models import Announcement
+
+
+@admin.register(Announcement)
+class AnnouncementAdmin(admin.ModelAdmin):
+    """Manage the admin pages for the announcements."""
+
+    list_display = ("title", "since", "until", "visible")
+
+    def visible(self, obj):
+        """Is the object visible."""
+        return obj.is_visible
+
+    visible.boolean = True