[PATCH proxmox-backup 6/9] fix #7908: datastore: ui: add option to create zero-byte chunk markers

[Shan Shaji <s.shaji@proxmox.com>]

Expose the `rebuild-chunk-markers` option inside the datastore creation
window to allow creating empty, zero-byte chunk markers.

This option is disabled and can only be enabled when configuring an
S3-backed datastore.

Fixes: https://bugzilla.proxmox.com/show_bug.cgi?id=7908
---
 www/window/DataStoreEdit.js | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/www/window/DataStoreEdit.js b/www/window/DataStoreEdit.js
index 911bf47d6..f536ec659 100644
--- a/www/window/DataStoreEdit.js
+++ b/www/window/DataStoreEdit.js
@@ -81,6 +81,9 @@ Ext.define('PBS.DataStoreEdit', {
                                 let reuseDatastore = inputPanel
                                     .down('[name=reuse-datastore]')
                                     .getValue();
+                                let rebuildChunkMarkersField = inputPanel.down(
+                                    '[name=rebuild-chunk-markers]',
+                                );
 
                                 uuidEditField.setDisabled(!isRemovable);
                                 uuidEditField.allowBlank = !isRemovable;
@@ -100,6 +103,10 @@ Ext.define('PBS.DataStoreEdit', {
                                 overwriteInUseField.setDisabled(!reuseDatastore);
                                 overwriteInUseField.setValue(false);
 
+                                rebuildChunkMarkersField.setHidden(!isS3);
+                                rebuildChunkMarkersField.setDisabled(!reuseDatastore);
+                                rebuildChunkMarkersField.setValue(false);
+
                                 if (isRemovable) {
                                     pathField.setFieldLabel(gettext('Path on Device'));
                                     pathField.setEmptyText(gettext('A relative path'));
@@ -204,6 +211,12 @@ Ext.define('PBS.DataStoreEdit', {
                                     inputPanel.down('[name=overwrite-in-use]');
                                 overwriteInUseField.setDisabled(!selected);
                                 overwriteInUseField.setValue(false);
+
+                                let rebuildChunkMarkersField = inputPanel.down(
+                                    '[name=rebuild-chunk-markers]',
+                                );
+                                rebuildChunkMarkersField.setDisabled(!selected);
+                                rebuildChunkMarkersField.setValue(false);
                             },
                         },
                     },
@@ -216,6 +229,13 @@ Ext.define('PBS.DataStoreEdit', {
                         hidden: true,
                         disabled: true,
                     },
+                    {
+                        xtype: 'checkbox',
+                        name: 'rebuild-chunk-markers',
+                        fieldLabel: gettext('Rebuild chunk markers'),
+                        hidden: true,
+                        disabled: true,
+                    },
                 ],
 
                 onGetValues: function (values) {
-- 
2.47.3