added admin whitebox functionality

classes/plugin/ScssCompiler.php

@@ -0,0 +1,44 @@
+<?php
+namespace Grav\Plugin\Admin;
+
+use ScssPhp\ScssPhp\Compiler;
+
+class ScssCompiler
+{
+    protected $compiler;
+
+    public function compiler()
+    {
+        if ($this->compiler === null) {
+            $this->reset();
+        }
+        return $this->compiler;
+    }
+
+    public function reset()
+    {
+        $this->compiler = new Compiler();
+        return $this;
+    }
+
+    public function setVariables($variables)
+    {
+        $this->compiler()->setVariables($variables);
+        return $this;
+    }
+
+    public function setImportPaths($paths)
+    {
+        $this->compiler()->setImportPaths($paths);
+        return $this;
+    }
+
+    public function compile($input_file, $output_file)
+    {
+        $input = file_get_contents($input_file);
+        $output = $this->compiler()->compile($input);
+        file_put_contents($output_file, $output);
+        return $this;
+    }
+
+}