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

/**
* Renders the `core/comments-pagination-numbers` 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 pagination numbers for the comments.
*/
function render_block_core_comments_pagination_numbers( $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 );

$total = ( new WP_Comment_Query( $comment_vars ) )->max_num_pages;
$current = ! empty( $comment_vars['paged'] ) ? $comment_vars['paged'] : null;

// Render links.
$content = paginate_comments_links(
array(
'total' => $total,
'current' => $current,
'prev_next' => false,
'echo' => false,
)
);

if ( empty( $content ) ) {
return '';
}

$wrapper_attributes = get_block_wrapper_attributes();

return sprintf(
'<div %1$s>%2$s</div>',
$wrapper_attributes,
$content
);
}

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