Use and set the unit on setupVars.conf option TEMPERATUREUNIT

New behavior!!!
The temperature unit will be set GLOBALLY and not per browser.

- if a TEMPERATUREUNIT is set in setupVars.conf file, the value will be used.
- if there is no unit set in setupVars.conf, "C" will be used;
- changing the value on the web interface WILL CHANGE setupVars.conf.
- if the browser has an old value set on locastorage, this will be ingnored.

Signed-off-by: RD WebDesign <github@rdwebdesign.com.br>

scripts/pi-hole/php/header_authenticated.php

@@ -98,7 +98,22 @@ function getTemperature()
         $limit = null;
     }
 
-    return array($celsius, $limit);
+    // Get user-defined temperature limit if set
+    if (isset($setupVars['TEMPERATUREUNIT'])) {
+        switch (strtoupper($setupVars['TEMPERATUREUNIT'])) {
+            case 'F':
+            case 'K':
+                $unit = strtoupper($setupVars['TEMPERATUREUNIT']);
+                break;
+
+            default:
+                $unit = 'C';
+        }
+    } else {
+        $unit = 'C';
+    }
+
+    return array($celsius, $limit, $unit);
 }
 
 check_cors();
@@ -113,7 +128,7 @@ $token = $_SESSION['token'];
 $maxlifetime = ini_get('session.gc_maxlifetime');
 
 // Get temperature
-list($celsius, $temperaturelimit) = getTemperature();
+list($celsius, $temperaturelimit, $temperatureunit) = getTemperature();
 
 // Get CPU load
 $loaddata = sys_getloadavg();