[PATCH datacenter-manager v2 2/4] ui: auto-installer: set a default template that users can adapt

[Shannon Sterz <s.sterz@proxmox.com>]

instead of just a placeholder that vanishes after someone types a
letter. the default template is special cased as invalid so users need
to adapt it before proceeding.

Signed-off-by: Shannon Sterz <s.sterz@proxmox.com>
---
 .../remotes/auto_installer/prepared_answer_add_wizard.rs   | 2 +-
 ui/src/remotes/auto_installer/prepared_answer_form.rs      | 7 +++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/ui/src/remotes/auto_installer/prepared_answer_add_wizard.rs b/ui/src/remotes/auto_installer/prepared_answer_add_wizard.rs
index 6ec67d0..d099d5c 100644
--- a/ui/src/remotes/auto_installer/prepared_answer_add_wizard.rs
+++ b/ui/src/remotes/auto_installer/prepared_answer_add_wizard.rs
@@ -55,7 +55,7 @@ impl AddAnswerWizardProperties {
             target_filter: BTreeMap::new(),
             // global options
             country: "at".to_owned(),
-            fqdn: String::new(),
+            fqdn: "{{product.product}}{{installation_nr}}.example.com".to_string(),
             use_dhcp_fqdn: false,
             keyboard: answer::KeyboardLayout::default(),
             mailto: String::new(),
diff --git a/ui/src/remotes/auto_installer/prepared_answer_form.rs b/ui/src/remotes/auto_installer/prepared_answer_form.rs
index 72d2856..6efa66b 100644
--- a/ui/src/remotes/auto_installer/prepared_answer_form.rs
+++ b/ui/src/remotes/auto_installer/prepared_answer_form.rs
@@ -335,6 +335,13 @@ pub fn render_network_options_form(
                 .tip(tr!(
                     "Hostname and domain to set for the target installation. Allows templating."
                 ))
+                .validate(|s: &String| {
+                    if s != "{{product.product}}{{installation_nr}}.example.com" {
+                        Ok(())
+                    } else {
+                        Err(anyhow!("Please adapt the default FQDN template!"))
+                    }
+                })
                 .required(!use_dhcp_fqdn),
         )
         .with_right_field("", DisplayField::new().key("dummy"))
-- 
2.47.3