Add WC blocks preprocessing

[MAILPOET-2286]

lib/Newsletter/Renderer/Preprocessor.php

@@ -2,9 +2,12 @@
 
 namespace MailPoet\Newsletter\Renderer;
 
+use MailPoet\Newsletter\Editor\LayoutHelper;
 use MailPoet\Newsletter\Renderer\Blocks\Renderer as BlocksRenderer;
 
 class Preprocessor {
+  const WC_HEADING_PLACEHOLDER = '[mailpet_woocommerce_heading_placeholder]';
+  const WC_CONTENT_PLACEHOLDER = '[mailpet_woocommerce_content_placeholder]';
 
   /** @var BlocksRenderer */
   private $blocks_renderer;
@@ -23,16 +26,40 @@ class Preprocessor {
     }
     $blocks = [];
     foreach ($content['blocks'] as $block) {
-      if ($block['type'] === 'automatedLatestContentLayout') {
-        $blocks = array_merge(
-          $blocks,
-          $this->blocks_renderer->automatedLatestContentTransformedPosts($block)
-        );
-      } else {
-        $blocks[] = $block;
-      }
+      $blocks = array_merge($blocks, $this->processBlock($block));
     }
     $content['blocks'] = $blocks;
     return $content;
   }
+
+    /**
+   * @param array $block
+   * @return array
+   */
+  public function processBlock($block) {
+    switch ($block['type']) {
+      case 'automatedLatestContentLayout':
+        return $this->blocks_renderer->automatedLatestContentTransformedPosts($block);
+      case 'woocommerceHeading':
+        return $this->placeholder(self::WC_HEADING_PLACEHOLDER);
+      case 'woocommerceContent':
+        return $this->placeholder(self::WC_CONTENT_PLACEHOLDER);
+    }
+    return [$block];
+  }
+
+  /**
+   * @param array $block
+   * @return array
+   */
+  private function placeholder($text) {
+    return [
+      LayoutHelper::row([
+        LayoutHelper::col([[
+          'type' => 'text',
+          'text' => $text,
+        ]]),
+      ]),
+    ];
+  }
 }