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