1<?php
  2/**
  3 * Server-side rendering of the `core/comments-pagination-next` block.
  4 *
  5 * @package WordPress
  6 */
  7
  8/**
  9 * Renders the `core/comments-pagination-next` block on the server.
 10 *
 11 * @since 6.0.0
 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 next comments link for the query pagination.
 18 */
 19function render_block_core_comments_pagination_next( $attributes, $content, $block ) {
 20	// Bail out early if the post ID is not set for some reason.
 21	if ( empty( $block->context['postId'] ) ) {
 22		return '';
 23	}
 24
 25	$comment_vars     = build_comment_query_vars_from_block( $block );
 26	$max_page         = ( new WP_Comment_Query( $comment_vars ) )->max_num_pages;
 27	$default_label    = __( 'Newer Comments' );
 28	$label            = isset( $attributes['label'] ) && ! empty( $attributes['label'] ) ? $attributes['label'] : $default_label;
 29	$pagination_arrow = get_comments_pagination_arrow( $block, 'next' );
 30
 31	$filter_link_attributes = static function () {
 32		return get_block_wrapper_attributes();
 33	};
 34	add_filter( 'next_comments_link_attributes', $filter_link_attributes );
 35
 36	if ( $pagination_arrow ) {
 37		$label .= $pagination_arrow;
 38	}
 39
 40	$next_comments_link = get_next_comments_link( $label, $max_page, $comment_vars['paged'] ?? null );
 41
 42	remove_filter( 'next_posts_link_attributes', $filter_link_attributes );
 43
 44	if ( ! isset( $next_comments_link ) ) {
 45		return '';
 46	}
 47	return $next_comments_link;
 48}
 49
 50
 51/**
 52 * Registers the `core/comments-pagination-next` block on the server.
 53 *
 54 * @since 6.0.0
 55 */
 56function register_block_core_comments_pagination_next() {
 57	register_block_type_from_metadata(
 58		__DIR__ . '/comments-pagination-next',
 59		array(
 60			'render_callback' => 'render_block_core_comments_pagination_next',
 61		)
 62	);
 63}
 64add_action( 'init', 'register_block_core_comments_pagination_next' );
 65