Add a basic adapter for public Tableau visualizations

Author: Benjamin Melançon

src/Adapters/Tableau.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace Embed\Adapters;
+
+use Embed\Http\Response;
+use Embed\Utils;
+
+/**
+ * Adapter to hardcode the embed code for Tableau public.
+ */
+class Tableau extends Webpage
+{
+    /**
+     * {@inheritdoc}
+     */
+    public static function DoNotUSEcheck(Response $response)
+    {
+        // https://public.tableau.com/views/NAME_OF_VIEW/SubName?:language=en-US&:display_count=n&:origin=viz_share_link
+        return $response->isValid() && $response->getUrl()->match([
+            '*.public.tableau.com/views/*/*',
+        ]);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getCode()
+    {
+        $this->width = '100%';
+        $this->height = '60vh';
+
+        // $this->url ends up not being the same one Tableau offers when you
+        // copy the share link.
+        $embed_url = $this->response->getStartingUrl() . '&:showVizHome=no&:embed=true';
+
+        return Utils::iframe($embed_url);
+    }
+}