<?php

declare( strict_types=1 );

namespace Blockify\Theme;

use function add_filter;
use function explode;
use function implode;
use function sanitize_title_with_dashes;

add_filter( 'render_block_core/heading', NS . 'render_heading_block', 10, 2 );
/**
 * Modifies front end HTML output of block.
 *
 * @since 0.0.2
 *
 * @param string $html  Block HTML.
 * @param array  $block Block data.
 *
 * @return string
 */
function render_heading_block( string $html, array $block ): string {
	$dom = dom( $html );

	// No way of knowing tag.
	$heading = get_dom_element( '*', $dom );

	if ( ! $heading ) {
		return $html;
	}

	$classes   = explode( ' ', $heading->getAttribute( 'class' ) );
	$classes[] = 'wp-block-heading';

	$styles = css_string_to_array( $heading->getAttribute( 'style' ) );

	$heading->setAttribute(
		'class',
		implode( ' ', $classes )
	);

	$heading->setAttribute(
		'style',
		css_array_to_string( $styles )
	);

	$id = $heading->getAttribute( 'id' );

	if ( ! $id ) {
		$heading->setAttribute(
			'id',
			sanitize_title_with_dashes( $heading->textContent )
		);
	}

	if ( ! $heading->getAttribute( 'style' ) ) {
		$heading->removeAttribute( 'style' );
	}

	return $dom->saveHTML();
}