<?php
defined( 'GTM_BLOCK_SUPPORT_ID_KEY' ) || define( 'GTM_BLOCK_SUPPORT_ID_KEY', 'gtmBlockId' );

/**
 * Registers the align block attribute for block types that support it.
 *
 * @param WP_Block_Type $block_type Block Type.
 */
function gtm_register_block_id_support( $block_type ) {

	if ( ! $block_type->attributes ) {
		$block_type->attributes = [];
	}

	if ( ! array_key_exists( 'gtmBlockId', $block_type->attributes ) ) {
		$block_type->attributes['gtmBlockId'] = [
			'type'    => 'string',
			'default' => "",
		];
	}
}

// Register the block support.
WP_Block_Supports::get_instance()->register(
	GTM_BLOCK_SUPPORT_ID_KEY,
	[
		'register_attribute' => 'gtm_register_block_id_support',
	]
);