From 6d852accf080c23debbe74f43fdd956dd69fc800 Mon Sep 17 00:00:00 2001
From: Joe Bailey-Roberts <joe.br@humanmade.com>
Date: Fri, 7 Jul 2023 12:22:47 +0100
Subject: [PATCH] Start to construct functionality for block registration

---
 asset-loader.php |  1 +
 inc/blocks.php   | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+)
 create mode 100644 inc/blocks.php

diff --git a/asset-loader.php b/asset-loader.php
index 45f2cca..458ef84 100644
--- a/asset-loader.php
+++ b/asset-loader.php
@@ -36,6 +36,7 @@
 const LOADED = true;
 
 require plugin_dir_path( __FILE__ ) . 'inc/admin.php';
+require plugin_dir_path( __FILE__ ) . 'inc/blocks.php';
 require plugin_dir_path( __FILE__ ) . 'inc/manifest.php';
 require plugin_dir_path( __FILE__ ) . 'inc/paths.php';
 require plugin_dir_path( __FILE__ ) . 'inc/namespace.php';
diff --git a/inc/blocks.php b/inc/blocks.php
new file mode 100644
index 0000000..c368097
--- /dev/null
+++ b/inc/blocks.php
@@ -0,0 +1,48 @@
+<?php
+/**
+ * Define functions for registering a block from metadata with asset-loader.
+ */
+
+declare( strict_types=1 );
+
+namespace Asset_Loader\Blocks;
+
+use WP_Block_Type;
+
+/**
+ * Get list of keys in block.json which should be filtered to load from a manifest.
+ *
+ * @return string[] An array of keys for block.json
+ */
+function get_asset_keys() : array {
+
+	$asset_keys = [
+		'editorScript',
+		'script',
+		'viewScript',
+		'editorStyle',
+
+	];
+
+	return apply_filters( 'asset_loader_block_asset_keys', $asset_keys );
+}
+
+function register_block_type_with_manifests( string|WP_Block_Type $block_type, array $args = [] ) {
+
+	// Early return if we are not using block.json.
+	if ( ! is_string( $block_type ) ) {
+		return \register_block_type( $block_type, $args );
+	}
+
+	add_filter( 'block_type_metadata', __NAMESPACE__ . '\\filter_block_metadata_scripts', 10, 1 );
+
+	$block = \register_block_type( $block_type, $args );
+
+	remove_filter( 'block_type_metadata', __NAMESPACE__ . '\\filter_block_metadata_scripts' );
+
+	return $block;
+}
+
+function filter_block_metadata_scripts( $metadata ) {
+	$asset_keys = get_asset_keys();
+}