<?php
/**
* Server-side rendering of the `core/site-title` block.
*
* @package WordPress
*/

/**
* Renders the `core/site-title` block on the server.
*
* @since 5.8.0
*
* @param array $attributes The block attributes.
*
* @return string The render.
*/
function render_block_core_site_title( $attributes ) {
$site_title = get_bloginfo( 'name' );
if ( ! $site_title ) {
return;
}

$tag_name = 'h1';
$classes = empty( $attributes['textAlign'] ) ? '' : "has-text-align-{$attributes['textAlign']}";
if ( isset( $attributes['style']['elements']['link']['color']['text'] ) ) {
$classes .= ' has-link-color';
}

if ( isset( $attributes['level'] ) ) {
$tag_name = 0 === $attributes['level'] ? 'p' : 'h' . (int) $attributes['level'];
}

if ( $attributes['isLink'] ) {
$aria_current = ! is_paged() && ( is_front_page() || is_home() && ( (int) get_option( 'page_for_posts' ) !== get_queried_object_id() ) ) ? ' aria-current="page"' : '';
$link_target = ! empty( $attributes['linkTarget'] ) ? $attributes['linkTarget'] : '_self';

$site_title = sprintf(
'<a href="%1$s" target="%2$s" rel="home"%3$s>%4$s</a>',
esc_url( home_url() ),
esc_attr( $link_target ),
$aria_current,
esc_html( $site_title )
);
}
$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => trim( $classes ) ) );

return sprintf(
'<%1$s %2$s>%3$s</%1$s>',
$tag_name,
$wrapper_attributes,
// already pre-escaped if it is a link.
$attributes['isLink'] ? $site_title : esc_html( $site_title )
);
}

/**
* Registers the `core/site-title` block on the server.
*
* @since 5.8.0
*/
function register_block_core_site_title() {
register_block_type_from_metadata(
__DIR__ . '/site-title',
array(
'render_callback' => 'render_block_core_site_title',
)
);
}
add_action( 'init', 'register_block_core_site_title' );