[PATCH manager v7 17/24] ui: guest ID selector: show the error returned by nextid

["Michael Köppl" <m.koeppl@proxmox.com>]

The guest ID field validates IDs through the /cluster/nextid endpoint
and reported any failure, including failed requests, as the ID being
in use. Show the error the endpoint returns instead, so that the
actual reason for rejecting an ID is visible. This is also needed for
the endpoint to reject IDs that are not in use, but forbidden by the
next-id datacenter option.

Signed-off-by: Michael Köppl <m.koeppl@proxmox.com>
---
 www/manager6/form/GuestIDSelector.js | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/www/manager6/form/GuestIDSelector.js b/www/manager6/form/GuestIDSelector.js
index f3160a744..fdf9e7610 100644
--- a/www/manager6/form/GuestIDSelector.js
+++ b/www/manager6/form/GuestIDSelector.js
@@ -27,7 +27,7 @@ Ext.define('PVE.form.GuestIDSelector', {
         }
 
         if (me.validateExists === false && me.rejected) {
-            return me.inUseID;
+            return me.nextIDError;
         }
 
         return true;
@@ -37,7 +37,6 @@ Ext.define('PVE.form.GuestIDSelector', {
         var me = this;
         var label = '{0} ID';
         var unknownID = gettext('This {0} ID does not exist');
-        var inUseID = gettext('This {0} ID is already in use');
         var type = 'CT/VM';
 
         if (me.guestType === 'lxc') {
@@ -48,7 +47,6 @@ Ext.define('PVE.form.GuestIDSelector', {
 
         me.label = Ext.String.format(label, type);
         me.unknownID = Ext.String.format(unknownID, type);
-        me.inUseID = Ext.String.format(inUseID, type);
 
         Ext.apply(me, {
             fieldLabel: me.label,
@@ -67,6 +65,10 @@ Ext.define('PVE.form.GuestIDSelector', {
                         },
                         failure: function (response, opts) {
                             me.rejected = true;
+                            let error = response.result?.errors?.vmid;
+                            me.nextIDError = error
+                                ? Ext.htmlEncode(error.trim())
+                                : response.htmlStatus;
                             me.validate();
                         },
                     });
-- 
2.47.3