Revisione modulo Stato dei servizi

Miglioramento gestione moduli e widget, introduzione alla gestione dei plugin. Revisione della schermata di informazioni sui servizi attivi.

lib/util.php

@@ -567,3 +567,35 @@ if (!function_exists('temp_file')) {
         return $file;
     }
 }
+
+if (!function_exists('adjustBrightness')) {
+    /**
+     * Increases or decreases the brightness of a color by a percentage of the current brightness.
+     *
+     * @param string $hexCode       Supported formats: `#FFF`, `#FFFFFF`, `FFF`, `FFFFFF`
+     * @param float  $adjustPercent A number between -1 and 1. E.g. 0.3 = 30% lighter; -0.4 = 40% darker.
+     *
+     * @return string
+     *
+     * @author  maliayas
+     */
+    function adjustBrightness($hexCode, $adjustPercent)
+    {
+        $hexCode = ltrim($hexCode, '#');
+
+        if (strlen($hexCode) == 3) {
+            $hexCode = $hexCode[0].$hexCode[0].$hexCode[1].$hexCode[1].$hexCode[2].$hexCode[2];
+        }
+
+        $hexCode = array_map('hexdec', str_split($hexCode, 2));
+
+        foreach ($hexCode as &$color) {
+            $adjustableLimit = $adjustPercent < 0 ? $color : 255 - $color;
+            $adjustAmount = ceil($adjustableLimit * $adjustPercent);
+
+            $color = str_pad(dechex($color + $adjustAmount), 2, '0', STR_PAD_LEFT);
+        }
+
+        return '#'.implode($hexCode);
+    }
+}