feat: allow auto clearing notificaiton log (#18344) (#18345)

(cherry picked from commit 4020513712)

Co-authored-by: Ankush Menat <ankush@frappe.io>

frappe/desk/doctype/notification_log/notification_log.py

@@ -20,6 +20,14 @@ class NotificationLog(Document):
 			except frappe.OutgoingEmailError:
 				self.log_error(_("Failed to send notification email"))
 
+	@staticmethod
+	def clear_old_logs(days=180):
+		from frappe.query_builder import Interval
+		from frappe.query_builder.functions import Now
+
+		table = frappe.qb.DocType("Notification Log")
+		frappe.db.delete(table, filters=(table.modified < (Now() - Interval(days=days))))
+
 
 def get_permission_query_conditions(for_user):
 	if not for_user:

frappe/desk/doctype/notification_log/notification_log_list.js

@@ -0,0 +1,7 @@
+frappe.listview_settings["Notification Log"] = {
+	onload: function (listview) {
+		frappe.require("logtypes.bundle.js", () => {
+			frappe.utils.logtypes.show_log_retention_message(cur_list.doctype);
+		});
+	},
+};