1<?php
  2/**
  3 * Server-side rendering of the `core/post-title` block.
  4 *
  5 * @package WordPress
  6 */
  7
  8/**
  9 * Renders the `core/post-title` block on the server.
 10 *
 11 * @since 6.3.0 Omitting the $post argument from the `get_the_title`.
 12 *
 13 * @param array    $attributes Block attributes.
 14 * @param string   $content    Block default content.
 15 * @param WP_Block $block      Block instance.
 16 *
 17 * @return string Returns the filtered post title for the current post wrapped inside "h1" tags.
 18 */
 19function render_block_core_post_title( $attributes, $content, $block ) {
 20	if ( ! isset( $block->context['postId'] ) ) {
 21		return '';
 22	}
 23
 24	/**
 25	 * The `$post` argument is intentionally omitted so that changes are reflected when previewing a post.
 26	 * See: https://github.com/WordPress/gutenberg/pull/37622#issuecomment-1000932816.
 27	 */
 28	$title = get_the_title();
 29
 30	if ( ! $title ) {
 31		return '';
 32	}
 33
 34	$tag_name = 'h2';
 35	if ( isset( $attributes['level'] ) ) {
 36		$tag_name = 0 === $attributes['level'] ? 'p' : 'h' . (int) $attributes['level'];
 37	}
 38
 39	if ( isset( $attributes['isLink'] ) && $attributes['isLink'] ) {
 40		$rel   = ! empty( $attributes['rel'] ) ? 'rel="' . esc_attr( $attributes['rel'] ) . '"' : '';
 41		$title = sprintf( '<a href="%1$s" target="%2$s" %3$s>%4$s</a>', esc_url( get_the_permalink( $block->context['postId'] ) ), esc_attr( $attributes['linkTarget'] ), $rel, $title );
 42	}
 43
 44	$classes = array();
 45	if ( isset( $attributes['textAlign'] ) ) {
 46		$classes[] = 'has-text-align-' . $attributes['textAlign'];
 47	}
 48	if ( isset( $attributes['style']['elements']['link']['color']['text'] ) ) {
 49		$classes[] = 'has-link-color';
 50	}
 51	$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => implode( ' ', $classes ) ) );
 52
 53	return sprintf(
 54		'<%1$s %2$s>%3$s</%1$s>',
 55		$tag_name,
 56		$wrapper_attributes,
 57		$title
 58	);
 59}
 60
 61/**
 62 * Registers the `core/post-title` block on the server.
 63 *
 64 * @since 5.8.0
 65 */
 66function register_block_core_post_title() {
 67	register_block_type_from_metadata(
 68		__DIR__ . '/post-title',
 69		array(
 70			'render_callback' => 'render_block_core_post_title',
 71		)
 72	);
 73}
 74add_action( 'init', 'register_block_core_post_title' );
 75