perf(access): batch tenant summary counts

src/govoplan_access/backend/administration.py

@@ -42,6 +42,69 @@ class SqlAccessAdministration(AccessAdministration):
             "active_api_keys": int(active_api_keys),
         }
 
+    def tenant_counts_many(
+        self,
+        session: object,
+        tenant_ids: Sequence[str],
+    ) -> Mapping[str, Mapping[str, int]]:
+        ids = tuple(dict.fromkeys(str(tenant_id) for tenant_id in tenant_ids if tenant_id))
+        if not ids:
+            return {}
+        db = _session(session)
+        counts: dict[str, dict[str, int]] = {
+            tenant_id: {
+                "users": 0,
+                "active_users": 0,
+                "groups": 0,
+                "api_keys": 0,
+                "active_api_keys": 0,
+            }
+            for tenant_id in ids
+        }
+        user_rows = (
+            db.query(
+                User.tenant_id,
+                func.count(User.id),
+                func.coalesce(
+                    func.sum(case((User.is_active.is_(True), 1), else_=0)),
+                    0,
+                ),
+            )
+            .filter(User.tenant_id.in_(ids))
+            .group_by(User.tenant_id)
+            .all()
+        )
+        for tenant_id, users, active_users in user_rows:
+            counts[tenant_id]["users"] = int(users)
+            counts[tenant_id]["active_users"] = int(active_users)
+
+        group_rows = (
+            db.query(Group.tenant_id, func.count(Group.id))
+            .filter(Group.tenant_id.in_(ids))
+            .group_by(Group.tenant_id)
+            .all()
+        )
+        for tenant_id, groups in group_rows:
+            counts[tenant_id]["groups"] = int(groups)
+
+        api_key_rows = (
+            db.query(
+                ApiKey.tenant_id,
+                func.count(ApiKey.id),
+                func.coalesce(
+                    func.sum(case((ApiKey.revoked_at.is_(None), 1), else_=0)),
+                    0,
+                ),
+            )
+            .filter(ApiKey.tenant_id.in_(ids))
+            .group_by(ApiKey.tenant_id)
+            .all()
+        )
+        for tenant_id, api_keys, active_api_keys in api_key_rows:
+            counts[tenant_id]["api_keys"] = int(api_keys)
+            counts[tenant_id]["active_api_keys"] = int(active_api_keys)
+        return counts
+
     def system_account_count(self, session: object) -> int:
         db = _session(session)
         return db.query(Account).count()