<?php 
/** 
 * Server-side rendering of the `core/post-title` block. 
 * 
 * @package WordPress 
 */ 
 
/** 
 * Renders the `core/post-title` block on the server. 
 * 
 * @since 6.3.0 Omitting the $post argument from the `get_the_title`. 
 * 
 * @param array    $attributes Block attributes. 
 * @param string   $content    Block default content. 
 * @param WP_Block $block      Block instance. 
 * 
 * @return string Returns the filtered post title for the current post wrapped inside "h1" tags. 
 */ 
function render_block_core_post_title( $attributes, $content, $block ) { 
    if ( ! isset( $block->context['postId'] ) ) { 
        return ''; 
    } 
 
    /** 
     * The `$post` argument is intentionally omitted so that changes are reflected when previewing a post. 
     * See: https://github.com/WordPress/gutenberg/pull/37622#issuecomment-1000932816. 
     */ 
    $title = get_the_title(); 
 
    if ( ! $title ) { 
        return ''; 
    } 
 
    $tag_name = 'h2'; 
    if ( isset( $attributes['level'] ) ) { 
        $tag_name = 0 === $attributes['level'] ? 'p' : 'h' . (int) $attributes['level']; 
    } 
 
    if ( isset( $attributes['isLink'] ) && $attributes['isLink'] ) { 
        $rel   = ! empty( $attributes['rel'] ) ? 'rel="' . esc_attr( $attributes['rel'] ) . '"' : ''; 
        $title = sprintf( '<a href="%1$s" target="%2$s" %3$s>%4$s</a>', esc_url( get_the_permalink( $block->context['postId'] ) ), esc_attr( $attributes['linkTarget'] ), $rel, $title ); 
    } 
 
    $classes = array(); 
    if ( isset( $attributes['textAlign'] ) ) { 
        $classes[] = 'has-text-align-' . $attributes['textAlign']; 
    } 
    if ( isset( $attributes['style']['elements']['link']['color']['text'] ) ) { 
        $classes[] = 'has-link-color'; 
    } 
    $wrapper_attributes = get_block_wrapper_attributes( array( 'class' => implode( ' ', $classes ) ) ); 
 
    return sprintf( 
        '<%1$s %2$s>%3$s</%1$s>', 
        $tag_name, 
        $wrapper_attributes, 
        $title 
    ); 
} 
 
/** 
 * Registers the `core/post-title` block on the server. 
 * 
 * @since 5.8.0 
 */ 
function register_block_core_post_title() { 
    register_block_type_from_metadata( 
        __DIR__ . '/post-title', 
        array( 
            'render_callback' => 'render_block_core_post_title', 
        ) 
    ); 
} 
add_action( 'init', 'register_block_core_post_title' ); 
 
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