sources/ldap: add status display to show last sync

passbook/sources/ldap/models.py

@@ -1,6 +1,8 @@
 """passbook LDAP Models"""
+from datetime import datetime
 from typing import Optional, Type
 
+from django.core.cache import cache
 from django.db import models
 from django.forms import ModelForm
 from django.utils.translation import gettext_lazy as _
@@ -8,6 +10,7 @@ from ldap3 import Connection, Server
 
 from passbook.core.models import Group, PropertyMapping, Source
 from passbook.lib.models import DomainlessURLValidator
+from passbook.lib.utils.template import render_to_string
 
 
 class LDAPSource(Source):
@@ -59,6 +62,20 @@ class LDAPSource(Source):
 
         return LDAPSourceForm
 
+    def state_cache_prefix(self, suffix: str) -> str:
+        """Key by which the ldap source status is saved"""
+        return f"source_ldap_{self.pk}_state_{suffix}"
+
+    @property
+    def ui_additional_info(self) -> str:
+        last_sync = cache.get(self.state_cache_prefix("last_sync"), None)
+        if last_sync:
+            last_sync = datetime.fromtimestamp(last_sync)
+
+        return render_to_string(
+            "ldap/source_list_status.html", {"source": self, "last_sync": last_sync}
+        )
+
     _connection: Optional[Connection] = None
 
     @property