Add support for SassMeister (implements #49)

Author: mburtscher

src/Adapters/Sassmeister.php

@@ -0,0 +1,32 @@
+<?php
+
+/**
+ * Adapter to generate embed code from SassMeister.
+ */
+namespace Embed\Adapters;
+
+use Embed\Request;
+use Embed\Utils;
+
+class Sassmeister extends Webpage implements AdapterInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public static function check(Request $request)
+    {
+        return $request->isValid() && $request->match([
+            'http://sassmeister.com/gist/*',
+        ]);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getCode()
+    {
+        $id = $this->request->getDirectoryPosition(1);
+
+        return Utils::iframe("http://embed.sassmeister.com/gist/{$id}");
+    }
+}