Files
LEDMatrix/web_interface/templates/v3
e2acbfb566 fix(web): don't validate double-sided settings when the feature is disabled (#422)
* fix(web): don't validate double-sided settings when the feature is disabled

Saving anything on the Display tab failed with a 400 when double-sided
mode was off:

    Double-sided copies (2) must divide chain length (3) evenly

The Display form posts every field in one request, including
double_sided_copies (default 2) and double_sided_axis, whether or not
the Enabled checkbox is ticked. The server block was gated only on "is
any double-sided field present in the payload" — it wrote
ds_config['enabled'] but never read it. A user with chain_length: 3 and
the untouched default copies: 2 was locked out of saving any display
setting at all: brightness, GPIO slowdown, Vegas, sync.

Gate the checks on the enabled flag:

- Divisibility against chain_length/parallel is hardware-relational and
  only runs when the feature is on.
- Structural checks (copies parses as an int in 2..8, axis in the
  whitelist) still 400 when enabled; when disabled they drop the value
  and leave the stored one untouched rather than rejecting the save.

The runtime already gated correctly (_resolve_double_sided returns None
when disabled), so nothing there changes.

Also in the Display tab:

- Hide Copies / Split Axis until Enabled is ticked, mirroring the Vegas
  Scroll pattern. Hidden rather than disabled, so the fields keep
  submitting and the server still sees an 'off' state to persist.
- Fix the save toast: the form's handler read xhr.responseJSON, a jQuery
  property that doesn't exist on a native XMLHttpRequest, so it was
  always undefined and every save reported a green "Display settings
  saved" — even the 400s. Parse responseText and use the real status.

Tests: two existing double-sided tests asserted 200 on payloads that the
divisibility check (added later, in #373) turns into 400s; the first now
supplies matching hardware values and the second passes as written now
that a disabled save skips the check. Added coverage for the reported
regression, for bad values while disabled, and for the check still
firing when enabled.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016aUvzTXpEYhNEWYQvFqQU9

* fix(web): treat only 2xx as a successful display save

Review feedback on #422.

- showDisplaySaveResult tested `xhr.status >= 400` for failure, so a
  network error — which reports status 0 — was waved through as
  "Display settings saved". That's the same class of false-success bug
  this branch set out to fix. Test the 2xx range instead, and let a
  response body refine a successful verdict without overturning a
  failed one.
- Annotate the _copies_fits_hardware helper, matching the annotated
  helpers already in api_v3.py.
- Cover the vertical divisibility branch: chain_length 2 would divide
  evenly, so only parallel 3 can produce the rejection, which pins the
  branch to the right hardware dimension.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016aUvzTXpEYhNEWYQvFqQU9

---------

Co-authored-by: Claude <noreply@anthropic.com>
2026-07-28 16:54:42 -04:00
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