1<?php
2/**
3 * Server-side rendering of the `core/comments-pagination-previous` block.
4 *
5 * @package WordPress
6 */
7
8/**
9 * Renders the `core/comments-pagination-previous` 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 previous posts link for the comments pagination.
18 */
19function render_block_core_comments_pagination_previous( $attributes, $content, $block ) {
20 $default_label = __( 'Older Comments' );
21 $label = isset( $attributes['label'] ) && ! empty( $attributes['label'] ) ? $attributes['label'] : $default_label;
22 $pagination_arrow = get_comments_pagination_arrow( $block, 'previous' );
23 if ( $pagination_arrow ) {
24 $label = $pagination_arrow . $label;
25 }
26
27 $filter_link_attributes = static function () {
28 return get_block_wrapper_attributes();
29 };
30 add_filter( 'previous_comments_link_attributes', $filter_link_attributes );
31
32 $comment_vars = build_comment_query_vars_from_block( $block );
33 $previous_comments_link = get_previous_comments_link( $label, $comment_vars['paged'] ?? null );
34
35 remove_filter( 'previous_comments_link_attributes', $filter_link_attributes );
36
37 if ( ! isset( $previous_comments_link ) ) {
38 return '';
39 }
40
41 return $previous_comments_link;
42}
43
44/**
45 * Registers the `core/comments-pagination-previous` block on the server.
46 *
47 * @since 6.0.0
48 */
49function register_block_core_comments_pagination_previous() {
50 register_block_type_from_metadata(
51 __DIR__ . '/comments-pagination-previous',
52 array(
53 'render_callback' => 'render_block_core_comments_pagination_previous',
54 )
55 );
56}
57add_action( 'init', 'register_block_core_comments_pagination_previous' );
58