From 11f0be55d871363cb4c07adbbeac57fb4ddf479e Mon Sep 17 00:00:00 2001
From: koenkk <koenkanters94@gmail.com>
Date: Mon, 12 Jun 2023 18:10:45 +0200
Subject: [PATCH] fix: Fix Home Assistant truncate error when `program` is
 `null`. https://github.com/Koenkk/zigbee2mqtt/issues/16460

---
 lib/extension/homeassistant.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/extension/homeassistant.ts b/lib/extension/homeassistant.ts
index 038d4fdba..dcd5f7f53 100644
--- a/lib/extension/homeassistant.ts
+++ b/lib/extension/homeassistant.ts
@@ -885,7 +885,8 @@ export default class HomeAssistant extends Extension {
                 const lookup: {[s: string]: KeyValue} = {
                     action: {icon: 'mdi:gesture-double-tap'},
                     programming_mode: {icon: 'mdi:calendar-clock'},
-                    program: {value_template: `{{ value_json.${firstExpose.property} | truncate(254, True, '', 0) }}`},
+                    program: {value_template: `{{ value_json.${firstExpose.property}|default("") ` +
+                        `| truncate(254, True, '', 0) }}`},
                 };
 
                 const discoveryEntry: DiscoveryEntry = {