woocommerce/packages/js/create-product-editor-block/plugin-templates/$slug.php.mustache

<?php
/**
 * Plugin Name:          {{title}}
{{#pluginURI}}
 * Plugin URI:           {{{pluginURI}}}
{{/pluginURI}}
{{#description}}
 * Description:          {{description}}
{{/description}}
 * Version:              {{version}}
 * Requires at least:    6.2
 * WC requires at least: 7.8
 * Requires PHP:         7.4
{{#author}}
 * Author:               {{author}}
{{/author}}
{{#license}}
 * License:              {{license}}
{{/license}}
{{#licenseURI}}
 * License URI:          {{{licenseURI}}}
{{/licenseURI}}
 * Text Domain:          {{textdomain}}
{{#domainPath}}
 * Domain Path:          {{{domainPath}}}
{{/domainPath}}
{{#updateURI}}
 * Update URI:           {{{updateURI}}}
{{/updateURI}}
 *
 * @package              {{namespace}}
 */

/**
 * Registers the block using the metadata loaded from the `block.json` file.
 * Behind the scenes, it registers also all assets so they can be enqueued
 * through the block editor in the corresponding context.
 *
 * @see https://developer.wordpress.org/reference/functions/register_block_type/
 */
function {{namespaceSnakeCase}}_{{slugSnakeCase}}_block_init() {
	if ( isset( $_GET['page'] ) && $_GET['page'] === 'wc-admin' ) {
		register_block_type( __DIR__ . '/build' );
	}
}
add_action( 'init', '{{namespaceSnakeCase}}_{{slugSnakeCase}}_block_init' );

function {{namespaceSnakeCase}}_{{slugSnakeCase}}_add_block_to_product_editor( $args ) {
	// if the product block editor is not enabled, return the args as-is
	if ( ! class_exists( '\Automattic\WooCommerce\Utilities\FeaturesUtil' ) ||
			! \Automattic\WooCommerce\Utilities\FeaturesUtil::feature_is_enabled( 'product_block_editor' ) ) {
		return $args;
	}

	// if the template is not set or is not an array, return the args as-is
	if ( ! isset( $args['template'] ) || ! is_array( $args['template'] ) ) {
		return $args;
	}

	$template = $args['template'];

	// find the 'Basic details' section and add our block to the end of it
	foreach ( $template as $tab_index => $tab ) {
		$tab_properties = $tab[1];

		if ( 'general' === $tab_properties['id'] ) {
			$tab_sections = $tab[2];

			foreach ( $tab_sections as $section_index => $section ) {
				$section_properties = $section[1];

				// TODO: this is not the right way to do this, since it is checking a localized string.
				if ( 'Basic details' === $section_properties['title'] ) {
					$section_fields = $section[2];

					// add our block to the end of the section
					$section_fields[] = [
						'{{namespace}}/{{slug}}',
						[
							'message' => '{{title}}',
						]
					];

					// update the template with our new block
					$args[ 'template' ][ $tab_index ][2][ $section_index ][2] = $section_fields;

					break;
				}
			}

			break;
		}
	}

	return $args;
}
add_filter( 'woocommerce_register_post_type_product', '{{namespaceSnakeCase}}_{{slugSnakeCase}}_add_block_to_product_editor', 100 );