[PATCH proxmox-backup] fix #7562: api/ui: make tape formatting in changer more consistent

[Dominik Csapak <d.csapak@proxmox.com>]

the 'format-media' api call takes a 'label-text' which is used for two
things simultaneously:
1. load a tape from a slot into the drive (where it's barcode is the
   given label-text)
2. check if the label on the tape is the one given

The web ui uses the fact nr. 1 as a feature to load + format in one
step, to reduce the necessary user actions, but this has a drawback:

if the user wants to load+format a tape this way that is either empty
or has unrelated data on it, we refuse to format it due to fact nr. 2.

To improve this, introduce a separate parameter for loading a tape with
a given barcode, and using the label-text separately for checking the on
tape label.

This can be used in the ui to handle all use cases:
* load + format a labeled tape
* load + format an empty tape
* load + format a tape with unrelated data
* check label + format without loading from a slot
* force format without any checking

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
---

I guess this could be seen as a breaking change, as we now require a new
parameter for loading the tape into the drive, but I currently don't see
a good way to keep this behavior while also fixing the bug properly.
(Without having a flag that uses the new behavior, that would still be
broken for the old one...)

 src/api2/tape/drive.rs    | 11 ++++++++---
 www/tape/ChangerStatus.js | 12 ++++++++++--
 www/tape/TapeInventory.js |  5 +++--
 www/tape/window/Erase.js  | 14 ++++++++++++--
 4 files changed, 33 insertions(+), 9 deletions(-)

diff --git a/src/api2/tape/drive.rs b/src/api2/tape/drive.rs
index 1a45ae406..c981fbb94 100644
--- a/src/api2/tape/drive.rs
+++ b/src/api2/tape/drive.rs
@@ -269,6 +269,10 @@ pub fn unload(
                 optional: true,
                 default: true,
             },
+            "load-barcode": {
+                schema: MEDIA_LABEL_SCHEMA,
+                optional: true,
+            },
             "label-text": {
                 schema: MEDIA_LABEL_SCHEMA,
                 optional: true,
@@ -286,6 +290,7 @@ pub fn unload(
 pub fn format_media(
     drive: String,
     fast: Option<bool>,
+    load_barcode: Option<String>,
     label_text: Option<String>,
     rpcenv: &mut dyn RpcEnvironment,
 ) -> Result<Value, Error> {
@@ -295,10 +300,10 @@ pub fn format_media(
         "format-media",
         Some(drive.clone()),
         move |_worker, config| {
-            if let Some(ref label) = label_text {
-                info!("try to load media '{label}'");
+            if let Some(barcode) = load_barcode {
+                info!("try to load media '{barcode}'");
                 if let Some((mut changer, _)) = media_changer(&config, &drive)? {
-                    changer.load_media(label)?;
+                    changer.load_media(&barcode)?;
                 }
             }
 
diff --git a/www/tape/ChangerStatus.js b/www/tape/ChangerStatus.js
index e5d6d5d76..c979024a1 100644
--- a/www/tape/ChangerStatus.js
+++ b/www/tape/ChangerStatus.js
@@ -164,10 +164,17 @@ Ext.define('PBS.TapeManagement.ChangerStatus', {
         'format-inserted': function (button, event, record) {
             let me = this;
 
+            let params = {};
+            if (record.data['is-labeled']) {
+                params = {
+                    'label-text': record.data['label-text'],
+                };
+            }
             let view = me.getView();
             PBS.Utils.driveCommand(record.data.name, 'format-media', {
                 waitMsgTarget: view,
                 method: 'POST',
+                params,
                 success: function (response) {
                     Ext.create('Proxmox.window.TaskProgress', {
                         upid: response.result.data,
@@ -182,12 +189,13 @@ Ext.define('PBS.TapeManagement.ChangerStatus', {
         format: function (v, rI, cI, button, el, record) {
             let me = this;
             let view = me.getView();
-            let label = record.data['label-text'];
+            let barcode = record.data['label-text'];
 
             let changer = encodeURIComponent(view.changer);
             let singleDrive = me.drives.length === 1 ? me.drives[0] : undefined;
             Ext.create('PBS.TapeManagement.EraseWindow', {
-                label,
+                barcode,
+                isLabeled: record.data['is-labeled'],
                 changer,
                 singleDrive,
                 listeners: {
diff --git a/www/tape/TapeInventory.js b/www/tape/TapeInventory.js
index 85e9fdea8..1e12a78e7 100644
--- a/www/tape/TapeInventory.js
+++ b/www/tape/TapeInventory.js
@@ -44,14 +44,15 @@ Ext.define('PBS.TapeManagement.TapeInventory', {
             if (!selection || selection.length < 1) {
                 return;
             }
-            let label = selection[0].data['label-text'];
+            let barcode = selection[0].data['label-text'];
             let inChanger = selection[0].data.location.startsWith('online-');
             let changer;
             if (inChanger) {
                 changer = selection[0].data.location.slice('online-'.length);
             }
             Ext.create('PBS.TapeManagement.EraseWindow', {
-                label,
+                barcode,
+                isLabeled: true,
                 changer,
                 listeners: {
                     destroy: function () {
diff --git a/www/tape/window/Erase.js b/www/tape/window/Erase.js
index 41df1a38f..e815f8e65 100644
--- a/www/tape/window/Erase.js
+++ b/www/tape/window/Erase.js
@@ -3,16 +3,18 @@ Ext.define('PBS.TapeManagement.EraseWindow', {
     mixins: ['Proxmox.Mixin.CBind'],
 
     changer: undefined,
-    label: undefined,
+    barcode: undefined,
+    isLabeled: false,
 
     cbindData: function (config) {
         let me = this;
         return {
+            label: me.isLabeled ? me.barcode : undefined,
             singleDrive: me.singleDrive,
             hasSingleDrive: !!me.singleDrive,
             warning: Ext.String.format(
                 gettext("Are you sure you want to format tape '{0}' ?"),
-                me.label,
+                me.barcode,
             ),
         };
     },
@@ -66,10 +68,18 @@ Ext.define('PBS.TapeManagement.EraseWindow', {
                                 hidden: '{changer}',
                             },
                         },
+                        {
+                            xtype: 'hidden',
+                            name: 'load-barcode',
+                            cbind: {
+                                value: '{barcode}',
+                            },
+                        },
                         {
                             xtype: 'hidden',
                             name: 'label-text',
                             cbind: {
+                                submitValue: '{isLabeled}',
                                 value: '{label}',
                             },
                         },
-- 
2.47.3