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fix(web): increase chain_length max from 8 to 32 (#300)

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* fix(web): increase chain_length max from 8 to 32

The web UI form input capped chain_length at 8 panels, preventing
users with larger displays (e.g. 16-panel setups) from configuring
their hardware through the UI. The backend API had no such limit.

Changed max="8" to max="32" to support large display configurations.
Added panel count example to the help text.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix(web): add server-side bounds validation for display hardware fields

The API endpoint at /api/v3/config/main accepted any integer value for
display hardware fields (chain_length, rows, cols, brightness, etc.)
without bounds checking. Only the HTML form had min/max attributes,
which are trivially bypassed by direct API calls.

Added _int_field_limits dict with bounds for all integer hardware fields:
  chain_length: 1-32, parallel: 1-4, brightness: 1-100,
  rows: 8-128, cols: 16-128, scan_mode: 0-1, pwm_bits: 1-11,
  pwm_dither_bits: 0-2, pwm_lsb_nanoseconds: 50-500,
  limit_refresh_rate_hz: 0-1000, gpio_slowdown: 0-5

Out-of-bounds or non-integer values now return 400 with a clear error
message (e.g. "Invalid chain_length value 99. Must be between 1 and 32.")
before any config is persisted. Follows the same inline validation
pattern already used for led_rgb_sequence, panel_type, and multiplexing.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix(api): strict int validation and add max_dynamic_duration_seconds bounds

Reject bool/float types in _int_field_limits validation loop to prevent
silent coercion, and add max_dynamic_duration_seconds to the validation
map so it gets proper bounds checking instead of a raw int() call.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Chuck
2026-03-29 20:17:14 -04:00
committed by GitHub
parent ee4149dc49
commit 7afc2c0670
2 changed files with 36 additions and 3 deletions
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4
web_interface/templates/v3/partials/display.html
View File

@@ -49,9 +49,9 @@
name="chain_length"
value="{{ main_config.display.hardware.chain_length or 2 }}"
min="1"
max="8"
max="32"
class="form-control">
<p class="mt-1 text-sm text-gray-600">Number of LED panels chained together</p>
<p class="mt-1 text-sm text-gray-600">Number of LED panels chained together (e.g. 2 for 128×32, 5 for 320×32)</p>
</div>
<div class="form-group">