[pbs-devel] [PATCH proxmox v2] time: make RFC3339 format in wasm conform to usual format

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

on other targets we print the timestamp without fractional seconds
('.xxxZ'), so we should remove that too on wasm

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
---
changes from v1:
* adapt thomas suggestions (thanks) to make code shorter and the error better

it's currently not possible to run cargo test in wasm32-unknown-unknown
so any test we write here cannot be executed (would have to be done with
another crate like 'wasm-bindgen-test' which requires a browser
environment to run the tests)

 proxmox-time/src/wasm.rs | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/proxmox-time/src/wasm.rs b/proxmox-time/src/wasm.rs
index 04cea7d..3f58b99 100644
--- a/proxmox-time/src/wasm.rs
+++ b/proxmox-time/src/wasm.rs
@@ -14,10 +14,18 @@ pub fn epoch_f64() -> f64 {
 pub fn epoch_to_rfc3339_utc(epoch: i64) -> Result<String, Error> {
     let js_date = js_sys::Date::new_0();
     js_date.set_time((epoch as f64) * 1000.0);
-    js_date
+    let mut js_date = js_date
         .to_iso_string()
         .as_string()
-        .ok_or_else(|| format_err!("to_iso_string did not return a string"))
+        .ok_or_else(|| format_err!("to_iso_string did not return a string"))?;
+
+    match js_date.len() {
+        len if len < 24 => bail!("invalid length {len} for rfc3339 string"),
+        len => {
+            js_date.replace_range((len - 5).., "Z"); // replace .xxxZ with Z
+            Ok(js_date)
+        }
+    }
 }
 
 /// Convert Unix epoch into RFC3339 local time with TZ
-- 
2.39.2