<?php
/**
* Server-side rendering of the `core/comments-pagination-next` block.
*
* @package WordPress
*/

/**
* Renders the `core/comments-pagination-next` block on the server.
*
* @since 6.0.0
*
* @param array $attributes Block attributes.
* @param string $content Block default content.
* @param WP_Block $block Block instance.
*
* @return string Returns the next comments link for the query pagination.
*/
function render_block_core_comments_pagination_next( $attributes, $content, $block ) {
// Bail out early if the post ID is not set for some reason.
if ( empty( $block->context['postId'] ) ) {
return '';
}

$comment_vars = build_comment_query_vars_from_block( $block );
$max_page = ( new WP_Comment_Query( $comment_vars ) )->max_num_pages;
$default_label = __( 'Newer Comments' );
$label = isset( $attributes['label'] ) && ! empty( $attributes['label'] ) ? $attributes['label'] : $default_label;
$pagination_arrow = get_comments_pagination_arrow( $block, 'next' );

$filter_link_attributes = static function () {
return get_block_wrapper_attributes();
};
add_filter( 'next_comments_link_attributes', $filter_link_attributes );

if ( $pagination_arrow ) {
$label .= $pagination_arrow;
}

$next_comments_link = get_next_comments_link( $label, $max_page, $comment_vars['paged'] ?? null );

remove_filter( 'next_posts_link_attributes', $filter_link_attributes );

if ( ! isset( $next_comments_link ) ) {
return '';
}
return $next_comments_link;
}


/**
* Registers the `core/comments-pagination-next` block on the server.
*
* @since 6.0.0
*/
function register_block_core_comments_pagination_next() {
register_block_type_from_metadata(
__DIR__ . '/comments-pagination-next',
array(
'render_callback' => 'render_block_core_comments_pagination_next',
)
);
}
add_action( 'init', 'register_block_core_comments_pagination_next' );