[PATCH manager] sdn: fabrics: disable prefix editing when nodes exist

[Gabriel Goller <g.goller@proxmox.com>]

Do not allow editing the fabric IPv4 or IPv6 prefix while the fabric
still has configured nodes. The API will throw an error, but this
improves the UX.

Suggested-by: Hannes Laimer <h.laimer@proxmox.com>
Signed-off-by: Gabriel Goller <g.goller@proxmox.com>
---
 www/manager6/sdn/FabricsView.js        | 5 +++++
 www/manager6/sdn/fabrics/FabricEdit.js | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/www/manager6/sdn/FabricsView.js b/www/manager6/sdn/FabricsView.js
index f2b8456a7720..88926462df11 100644
--- a/www/manager6/sdn/FabricsView.js
+++ b/www/manager6/sdn/FabricsView.js
@@ -310,6 +310,10 @@ Ext.define('PVE.sdn.Fabric.View', {
             return prefix === 'deleted' ? undefined : prefix;
         },
 
+        fabricHasConfiguredNodes: function (fabric) {
+            return (fabric.children ?? []).some((node) => node.state !== 'deleted');
+        },
+
         addWireGuard: function () {
             let me = this;
             me.openFabricAddWindow('wireguard');
@@ -406,6 +410,7 @@ Ext.define('PVE.sdn.Fabric.View', {
             let window = Ext.create(component, {
                 autoShow: true,
                 fabricId: fabric.id,
+                disableIpPrefixEdit: me.fabricHasConfiguredNodes(fabric),
             });
 
             window.on('destroy', () => me.reload());
diff --git a/www/manager6/sdn/fabrics/FabricEdit.js b/www/manager6/sdn/fabrics/FabricEdit.js
index 740719b1cc62..ddecbdc83df3 100644
--- a/www/manager6/sdn/fabrics/FabricEdit.js
+++ b/www/manager6/sdn/fabrics/FabricEdit.js
@@ -9,6 +9,8 @@ Ext.define('PVE.sdn.Fabric.Fabric.Edit', {
     hasIpv4Support: true,
     hasIpv6Support: true,
 
+    disableIpPrefixEdit: false,
+
     baseUrl: '/cluster/sdn/fabrics/fabric',
 
     viewModel: {
@@ -60,6 +62,7 @@ Ext.define('PVE.sdn.Fabric.Fabric.Edit', {
                 fieldLabel: gettext('IPv4 Prefix'),
                 labelWidth: 120,
                 name: 'ip_prefix',
+                disabled: me.disableIpPrefixEdit,
                 allowBlank: me.hasIpv6Support,
                 vtype: 'IPCIDRAddress',
                 skipEmptyText: true,
@@ -82,6 +85,7 @@ Ext.define('PVE.sdn.Fabric.Fabric.Edit', {
                     fieldLabel: gettext('IPv6 Prefix'),
                     labelWidth: 120,
                     name: 'ip6_prefix',
+                    disabled: me.disableIpPrefixEdit,
                     allowBlank: true,
                     vtype: 'IP6CIDRAddress',
                     skipEmptyText: true,
-- 
2.47.3