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Dashboard: support custom fan names on Airflow tile #2662

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Dashboard: support custom fan names on Airflow tile #2662

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Dashboard: support custom fan names on Airflow tile
mrjacobarussell Jun 10, 2026
6b359c2
Key fan_names.json by chip+sensor instead of index, stable across re-…
mrjacobarussell Jun 10, 2026
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15 changes: 14 additions & 1 deletion emhttp/plugins/dynamix/DashStats.page
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Original file line number Diff line number Diff line change
Expand Up @@ -804,10 +804,23 @@ switch ($themeHelper->getThemeName()) { // $themeHelper set in DefaultPageLayout
<?
$label = $value = [];
$i = 0;
// optional custom fan names, keyed by "<chip> - <fanN>" (matches `sensors -uA` order)
$fan_names_file = '/boot/config/plugins/dynamix/fan_names.json';
$fan_names = file_exists($fan_names_file) ? (json_decode(file_get_contents($fan_names_file), true) ?: []) : [];
$fan_keys = [];
$fan_chip = '';
foreach (explode("\n", shell_exec("sensors -uA 2>/dev/null") ?: '') as $fan_line) {
if (strpos($fan_line, ':') === false && trim($fan_line) !== '') {
$fan_chip = trim($fan_line);
} elseif (preg_match('/^\s*(fan\d+)_input:/', $fan_line, $fan_m)) {
$fan_keys[] = "$fan_chip - {$fan_m[1]}";
}
}
for ($fan=0; $fan<$fans; $fan++) {
if ($fan > 0 && $fan % 3 == 0) $i++;
$class = $fan % 3 == 2 ? "" : " class='fan'";
$label[$i][] = "<span{$class}>"._('FAN')." ".($fan+1)."</span>";
$fan_label = (($fan_names[$fan_keys[$fan] ?? ''] ?? '') !== '') ? htmlspecialchars($fan_names[$fan_keys[$fan]]) : _('FAN')." ".($fan+1);
$label[$i][] = "<span{$class}>$fan_label</span>";
Comment on lines +809 to +823

@coderabbitai coderabbitai Bot Jun 10, 2026

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⚠️ Potential issue | 🟠 Major | ⚡ Quick win

Validate custom fan-name type before escaping.

At Line 813, non-string JSON values can pass the !== '' check and then reach htmlspecialchars(...), which can trigger runtime errors and break Airflow tile rendering for malformed fan_names.json.

Suggested fix 
-$fan_names = file_exists($fan_names_file) ? (json_decode(file_get_contents($fan_names_file), true) ?: []) : [];
+$fan_names = file_exists($fan_names_file) ? json_decode(file_get_contents($fan_names_file), true) : [];
+if (!is_array($fan_names)) $fan_names = [];
 ...
-    $fan_label = ($fan_names[$fan] ?? '') !== '' ? htmlspecialchars($fan_names[$fan]) : _('FAN')." ".($fan+1);
+    $custom_name = $fan_names[$fan] ?? null;
+    $fan_label = (is_string($custom_name) && trim($custom_name) !== '')
+      ? htmlspecialchars($custom_name)
+      : _('FAN')." ".($fan+1);
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
$fan_names = file_exists($fan_names_file) ? (json_decode(file_get_contents($fan_names_file), true) ?: []) : [];
for ($fan=0; $fan<$fans; $fan++) {
if ($fan > 0 && $fan % 3 == 0) $i++;
$class = $fan % 3 == 2 ? "" : " class='fan'";
$label[$i][] = "<span{$class}>"._('FAN')." ".($fan+1)."</span>";
$fan_label = ($fan_names[$fan] ?? '') !== '' ? htmlspecialchars($fan_names[$fan]) : _('FAN')." ".($fan+1);
$label[$i][] = "<span{$class}>$fan_label</span>";
$fan_names = file_exists($fan_names_file) ? json_decode(file_get_contents($fan_names_file), true) : [];
if (!is_array($fan_names)) $fan_names = [];
for ($fan=0; $fan<$fans; $fan++) {
if ($fan > 0 && $fan % 3 == 0) $i++;
$class = $fan % 3 == 2 ? "" : " class='fan'";
$custom_name = $fan_names[$fan] ?? null;
$fan_label = (is_string($custom_name) && trim($custom_name) !== '')
? htmlspecialchars($custom_name)
: _('FAN')." ".($fan+1);
$label[$i][] = "<span{$class}>$fan_label</span>";
🤖 Prompt for AI Agents 
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@emhttp/plugins/dynamix/DashStats.page` around lines 809 - 814, The code uses
$fan_names[$fan] without ensuring it's a string before calling htmlspecialchars,
which can cause runtime errors for non-string JSON values; update the logic
around $fan_label in the loop (the handling that reads $fan_names_file,
$fan_names and assigns $fan_label) to first validate the value is a non-empty
string (e.g. is_string($fan_names[$fan]) && $fan_names[$fan] !== '') and only
then call htmlspecialchars on it, otherwise fall back to the default _('FAN')."
".($fan+1); ensure the check replaces the current !== '' test so malformed
fan_names.json entries won't reach htmlspecialchars.

}
$i = 0;
for ($fan=0; $fan<$fans; $fan++) {
Expand Down