How to check if I have Reusable Block in post content?

[vicolaspetru]

I use has_block function into this hook enqueue_block_assets to load specific scripts and/or styles depending on block in post_content. If I have the Reusable Block in the post, I can't check what kind of block it is, because the post_content is empty.

Can you suggest a method to enqueue styles and scripts only if the block are present in post? Or how can I check if post has reusable block?

[HardeepAsrani]

You can do it like:

$content = get_post_field( 'post_content', $post_id );
$blocks = $this->parse_blocks( $content );

if ( ! is_array( $blocks ) || empty( $blocks ) ) {
	return;
}

foreach ( $blocks as $block ) {
	if ( $block['blockName'] === 'core/block' && ! empty( $block['attrs']['ref'] ) ) {
		// Here it will pass the reusable block ID, then you can use get the post content and get a list of all the blocks. Parse them and use it.
	}
}

Let me know if it helps else I can write a custom has_reusable_block function that will also check for this.

Or maybe the Gutenberg team is also willing to have has_block function check for reusable_blocks, which should actually be the case?