Added block and content resolver for CoreFootnotes

.changeset/eighty-cameras-join.md

@@ -0,0 +1,45 @@
+---
+"@wpengine/wp-graphql-content-blocks": patch
+---
+
+Added content resolver for CoreFootnotes when the post_meta isn't loaded
+
+
+```gql
+fragment CoreFootnotesBlockFragment on CoreFootnotes {
+  innerBlocks {
+    renderedHtml
+  }
+}
+
+query Post($id: ID!) {
+  post(id: $id, idType: DATABASE_ID) {
+    databaseId
+    editorBlocks {
+      ...CoreFootnotesBlockFragment
+    }
+  }
+}
+```
+
+
+```json
+{
+  "data": {
+    "post": {
+      "databaseId": 16,
+      "editorBlocks": [
+        {},
+        {
+          "innerBlocks": [
+            {
+              "renderedHtml": "<ol class=\"footnotes\"><li id=\"d4051e5e-1547-49ff-ab6d-bec1caa6aabc\"><a href=\"https://wpengine.com/about-us/\">https://wpengine.com/about-us/</a></li><li id=\"2e79de23-68a8-42eb-87ab-1f2467a21752\"><a href=\"https://wpengine.com/support/\">https://wpengine.com/support/</a></li></ol>"
+            }
+          ]
+        },
+        {}
+      ]
+    }
+  }
+}
+```

includes/Blocks/CoreFootnotes.php

@@ -0,0 +1,27 @@
+<?php
+/**
+ * Core Paragraph Block
+ *
+ * @package WPGraphQL\ContentBlocks\Blocks
+ */
+
+namespace WPGraphQL\ContentBlocks\Blocks;
+
+/**
+ * Class CoreParagraph
+ */
+class CoreFootnotes extends Block {
+	/**
+	 * {@inheritDoc}
+	 *
+	 * @var array|null
+	 */
+	protected ?array $additional_block_attributes = [
+		'cssClassName' => [
+			'type'      => 'string',
+			'selector'  => 'p',
+			'source'    => 'attribute',
+			'attribute' => 'class',
+		],
+	];
+}

includes/Data/ContentBlocksResolver.php

@@ -152,6 +152,7 @@ private static function handle_do_block( array $block ): ?array {
 		$block = self::populate_post_content_inner_blocks( $block );
 		$block = self::populate_reusable_blocks( $block );
 		$block = self::populate_pattern_inner_blocks( $block );
+		$block = self::populate_core_footnotes_inner_blocks( $block );
 
 		// Prepare innerBlocks.
 		if ( ! empty( $block['innerBlocks'] ) ) {
@@ -292,6 +293,56 @@ private static function populate_pattern_inner_blocks( array $block ): array {
 		}
 
 		$block['innerBlocks'] = $resolved_patterns;
+
+		return $block;
+	}
+
+	/**
+	 * Populates the innerBlocks for core/footnotes
+	 *
+	 * @param array<string,mixed> $block The block to populate.
+	 *
+	 * @return array<string,mixed> The populated block.
+	 */
+	private static function populate_core_footnotes_inner_blocks( array $block ): array {
+
+		if ( 'core/footnotes' !== $block['blockName'] ) {
+			return $block;
+		}
+
+		$post = get_post();
+		if ( ! is_object( $post ) || ! is_a( $post, \WP_Post::class ) ) {
+			return $block;
+		}
+
+		$post_meta = get_post_meta( $post->ID, 'footnotes', true );
+		if ( ! $post_meta ) {
+			return $block;
+		}
+
+		$content = json_decode( $post_meta, true );
+		if ( empty( $content ) ) {
+			return $block;
+		}
+
+		$html = '';
+		/** @var array{id: string, content: string} $footnote */
+		foreach ( $content as $footnote ) {
+			$id      = $footnote['id'] ?? null;
+			$content = $footnote['content'] ?? null;
+			if ( ! $content ) {
+				continue;
+			}
+
+			$html .= "<li id=\"{$id}\">{$content}</li>";
+		}
+
+		$parsed_blocks = parse_blocks( "<ol class=\"footnotes\">{$html}</ol>" );
+
+		if ( empty( $parsed_blocks ) ) {
+			return $block;
+		}
+		$block['innerBlocks'] = $parsed_blocks;
 		return $block;
 	}
 
@@ -307,6 +358,7 @@ private static function flatten_block_list( $blocks ): array {
 		foreach ( $blocks as $block ) {
 			$result = array_merge( $result, self::flatten_inner_blocks( $block ) );
 		}
+
 		return $result;
 	}