Version 1

[yaffs-website] / web / core / modules / big_pipe / src / Render / BigPipeResponseAttachmentsProcessor.php

diff --git a/web/core/modules/big_pipe/src/Render/BigPipeResponseAttachmentsProcessor.php b/web/core/modules/big_pipe/src/Render/BigPipeResponseAttachmentsProcessor.php
new file mode 100644 (file)
index 0000000..94b8923
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+++ b/web/core/modules/big_pipe/src/Render/BigPipeResponseAttachmentsProcessor.php
@@ -0,0 +1,109 @@
+<?php
+
+namespace Drupal\big_pipe\Render;
+
+use Drupal\Core\Asset\AssetCollectionRendererInterface;
+use Drupal\Core\Asset\AssetResolverInterface;
+use Drupal\Core\Config\ConfigFactoryInterface;
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\Form\EnforcedResponseException;
+use Drupal\Core\Render\AttachmentsInterface;
+use Drupal\Core\Render\AttachmentsResponseProcessorInterface;
+use Drupal\Core\Render\HtmlResponseAttachmentsProcessor;
+use Drupal\Core\Render\RendererInterface;
+use Symfony\Component\HttpFoundation\RequestStack;
+
+/**
+ * Processes attachments of HTML responses with BigPipe enabled.
+ *
+ * @see \Drupal\Core\Render\HtmlResponseAttachmentsProcessor
+ * @see \Drupal\big_pipe\Render\BigPipe
+ */
+class BigPipeResponseAttachmentsProcessor extends HtmlResponseAttachmentsProcessor {
+
+  /**
+   * The HTML response attachments processor service.
+   *
+   * @var \Drupal\Core\Render\AttachmentsResponseProcessorInterface
+   */
+  protected $htmlResponseAttachmentsProcessor;
+
+  /**
+   * Constructs a BigPipeResponseAttachmentsProcessor object.
+   *
+   * @param \Drupal\Core\Render\AttachmentsResponseProcessorInterface $html_response_attachments_processor
+   *   The HTML response attachments processor service.
+   * @param \Drupal\Core\Asset\AssetResolverInterface $asset_resolver
+   *   An asset resolver.
+   * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
+   *   A config factory for retrieving required config objects.
+   * @param \Drupal\Core\Asset\AssetCollectionRendererInterface $css_collection_renderer
+   *   The CSS asset collection renderer.
+   * @param \Drupal\Core\Asset\AssetCollectionRendererInterface $js_collection_renderer
+   *   The JS asset collection renderer.
+   * @param \Symfony\Component\HttpFoundation\RequestStack $request_stack
+   *   The request stack.
+   * @param \Drupal\Core\Render\RendererInterface $renderer
+   *   The renderer.
+   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
+   *   The module handler service.
+   */
+  public function __construct(AttachmentsResponseProcessorInterface $html_response_attachments_processor, AssetResolverInterface $asset_resolver, ConfigFactoryInterface $config_factory, AssetCollectionRendererInterface $css_collection_renderer, AssetCollectionRendererInterface $js_collection_renderer, RequestStack $request_stack, RendererInterface $renderer, ModuleHandlerInterface $module_handler) {
+    $this->htmlResponseAttachmentsProcessor = $html_response_attachments_processor;
+    parent::__construct($asset_resolver, $config_factory, $css_collection_renderer, $js_collection_renderer, $request_stack, $renderer, $module_handler);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function processAttachments(AttachmentsInterface $response) {
+    assert('$response instanceof \Drupal\Core\Render\HtmlResponse');
+
+    // First, render the actual placeholders; this will cause the BigPipe
+    // placeholder strategy to generate BigPipe placeholders. We need those to
+    // exist already so that we can extract BigPipe placeholders. This is hence
+    // a bit of unfortunate but necessary duplication.
+    // @see \Drupal\big_pipe\Render\Placeholder\BigPipeStrategy
+    // (Note this is copied verbatim from
+    // \Drupal\Core\Render\HtmlResponseAttachmentsProcessor::processAttachments)
+    try {
+      $response = $this->renderPlaceholders($response);
+    }
+    catch (EnforcedResponseException $e) {
+      return $e->getResponse();
+    }
+
+    // Extract BigPipe placeholders; HtmlResponseAttachmentsProcessor does not
+    // know (nor need to know) how to process those.
+    $attachments = $response->getAttachments();
+    $big_pipe_placeholders = [];
+    $big_pipe_nojs_placeholders = [];
+    if (isset($attachments['big_pipe_placeholders'])) {
+      $big_pipe_placeholders = $attachments['big_pipe_placeholders'];
+      unset($attachments['big_pipe_placeholders']);
+    }
+    if (isset($attachments['big_pipe_nojs_placeholders'])) {
+      $big_pipe_nojs_placeholders = $attachments['big_pipe_nojs_placeholders'];
+      unset($attachments['big_pipe_nojs_placeholders']);
+    }
+    $html_response = clone $response;
+    $html_response->setAttachments($attachments);
+
+    // Call HtmlResponseAttachmentsProcessor to process all other attachments.
+    $processed_html_response = $this->htmlResponseAttachmentsProcessor->processAttachments($html_response);
+
+    // Restore BigPipe placeholders.
+    $attachments = $processed_html_response->getAttachments();
+    $big_pipe_response = clone $processed_html_response;
+    if (count($big_pipe_placeholders)) {
+      $attachments['big_pipe_placeholders'] = $big_pipe_placeholders;
+    }
+    if (count($big_pipe_nojs_placeholders)) {
+      $attachments['big_pipe_nojs_placeholders'] = $big_pipe_nojs_placeholders;
+    }
+    $big_pipe_response->setAttachments($attachments);
+
+    return $big_pipe_response;
+  }
+
+}