Navigation link: prime caches for all posts in menu items

packages/block-library/src/navigation/index.php

@@ -350,6 +350,41 @@ function block_core_navigation_get_fallback_blocks() {
  return apply_filters( 'block_core_navigation_render_fallback', $fallback_blocks );
 }
 
+/**
+ * Iterate through all inner blocks recursively and get navigation link block's post IDs.
+ *
+ * @param WP_Block_List $inner_blocks Block list class instance.
+ *
+ * @return array Array of post IDs.
+ */
+function block_core_navigation_get_post_ids( $inner_blocks ) {
+ $post_ids = array_map( 'block_core_navigation_from_block_get_post_ids', iterator_to_array( $inner_blocks ) );
+ return array_unique( array_merge( ...$post_ids ) );
+}
+
+/**
+ * Get post IDs from a navigation link block instance.
+ *
+ * @param WP_Block $block Instance of a block.
+ *
+ * @return array Array of post IDs.
+ */
+function block_core_navigation_from_block_get_post_ids( $block ) {
+ $post_ids = array();
+
+ if ( $block->inner_blocks ) {
+ $post_ids = block_core_navigation_get_post_ids( $block->inner_blocks );
+ }
+
+ if ( 'core/navigation-link' === $block->name || 'core/navigation-submenu' === $block->name ) {
+ if ( $block->attributes && isset( $block->attributes['kind'] ) && 'post-type' === $block->attributes['kind'] ) {
+ $post_ids[] = $block->attributes['id'];
+ }
+ }
+
+ return $post_ids;
+}
+
 /**
  * Renders the `core/navigation` block on server.
  *
@@ -506,6 +541,11 @@ function render_block_core_navigation( $attributes, $content, $block ) {
  $text_decoration ? array( $text_decoration_class ) : array()
  );
 
+ $post_ids = block_core_navigation_get_post_ids( $inner_blocks );
+ if ( $post_ids ) {
+ _prime_post_caches( $post_ids, false, false );
+ }
+
  $inner_blocks_html = '';
  $is_list_open = false;
  foreach ( $inner_blocks as $inner_block ) {

phpunit/blocks/render-block-navigation-test.php

@@ -0,0 +1,69 @@
+<?php
+/**
+ * Navigation block rendering tests.
+ *
+ * @package WordPress
+ * @subpackage Blocks
+ */
+
+/**
+ * Tests for the Navigation block.
+ *
+ * @group blocks
+ */
+class Render_Block_Navigation_Test extends WP_UnitTestCase {
+ /**
+ * @covers ::gutenberg_block_core_navigation_from_block_get_post_ids
+ */
+ public function test_block_core_navigation_get_post_ids_from_block() {
+ $parsed_blocks = parse_blocks(
+ '<!-- wp:navigation-link {"label":"Sample Page","type":"page","kind":"post-type","id":755,"url":"http:https://localhost:8888/?page_id=755"} /-->'
+ );
+ $parsed_block = $parsed_blocks[0];
+ $context = array();
+ $block = new WP_Block( $parsed_block, $context, $this->registry );
+
+ $post_ids = gutenberg_block_core_navigation_from_block_get_post_ids( $block );
+ $this->assertSameSets( array( 755 ), $post_ids );
+ }
+
+ /**
+ * @covers ::gutenberg_block_core_navigation_from_block_get_post_ids
+ */
+ public function test_block_core_navigation_get_post_ids_from_block_nested() {
+ $parsed_blocks = parse_blocks(
+ '<!-- wp:group -->
+ <!-- wp:navigation-link {"label":"Sample Page","type":"page","id":20,"url":"http:https://localhost:8888/?page_id=20","kind":"post-type","isTopLevelLink":true} /-->
+ <!-- wp:navigation-link {"label":"Hello world!","type":"post","id":10,"url":"http:https://localhost:8888/?p=10","kind":"post-type","isTopLevelLink":true} /-->
+ <!-- wp:navigation-submenu {"label":"Uncategorized","type":"category","id":1,"url":"http:https://localhost:8888/?cat=1","kind":"taxonomy","isTopLevelItem":true} -->
+ <!-- wp:navigation-link {"label":"Sample Page","type":"page","id":30,"url":"http:https://localhost:8888/?page_id=30","kind":"post-type","isTopLevelLink":false} /-->
+ <!-- wp:navigation-submenu {"label":"Hello world!","type":"post","id":40,"url":"http:https://localhost:8888/?p=40","kind":"post-type","isTopLevelItem":false} -->
+ <!-- wp:navigation-link {"label":"Uncategorized","type":"category","id":5,"url":"http:https://localhost:8888/?cat=5","kind":"taxonomy","isTopLevelLink":false} /-->
+ <!-- wp:navigation-link {"label":"Hello world!","type":"post","id":60,"url":"http:https://localhost:8888/?p=60","kind":"post-type","isTopLevelLink":false} /-->
+ <!-- /wp:navigation-submenu -->
+ <!-- /wp:navigation-submenu -->
+ <!-- /wp:group -->'
+ );
+ $parsed_block = $parsed_blocks[0];
+ $context = array();
+ $block = new WP_Block( $parsed_block, $context, $this->registry );
+
+ $post_ids = gutenberg_block_core_navigation_from_block_get_post_ids( $block );
+ $this->assertSameSets( array( 40, 60, 10, 20, 30 ), $post_ids );
+ }
+
+ /**
+ * @covers ::gutenberg_block_core_navigation_from_block_get_post_ids
+ */
+ public function test_block_core_navigation_get_post_ids_from_block_with_submenu() {
+ $parsed_blocks = parse_blocks( '<!-- wp:navigation-submenu {"label":"Test","type":"post","id":789,"url":"http:https://localhost/blog/test-3","kind":"post-type","isTopLevelItem":true} -->\n<!-- wp:navigation-link {"label":"(no title)","type":"post","id":755,"url":"http:https://localhost/blog/755","kind":"post-type","isTopLevelLink":false} /-->\n<!-- /wp:navigation-submenu -->' );
+ $parsed_block = $parsed_blocks[0];
+ $context = array();
+ $block = new WP_Block( $parsed_block, $context, $this->registry );
+
+ $post_ids = gutenberg_block_core_navigation_from_block_get_post_ids( $block );
+ $this->assertSameSetsWithIndex( array( 755, 789 ), $post_ids );
+ }
+
+
+}