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<?php
/**
* Server-side rendering of the `core/query-pagination-numbers` block.
*
* @package WordPress
*/
/**
* Renders the `core/query-pagination-numbers` block on the server.
*
* @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 Query.
*/
function render_block_core_query_pagination_numbers( $attributes, $content, $block ) {
$page_key = isset( $block->context['queryId'] ) ? 'query-' . $block->context['queryId'] . '-page' : 'query-page';
$page = empty( $_GET[ $page_key ] ) ? 1 : (int) $_GET[ $page_key ];
$max_page = isset( $block->context['query']['pages'] ) ? (int) $block->context['query']['pages'] : 0;
$wrapper_attributes = get_block_wrapper_attributes();
$content = '';
global $wp_query;
if ( isset( $block->context['query']['inherit'] ) && $block->context['query']['inherit'] ) {
// Take into account if we have set a bigger `max page`
// than what the query has.
$total = ! $max_page || $max_page > $wp_query->max_num_pages ? $wp_query->max_num_pages : $max_page;
$paginate_args = array(
'prev_next' => false,
'total' => $total,
);
$content = paginate_links( $paginate_args );
} else {
$block_query = new WP_Query( build_query_vars_from_query_block( $block, $page ) );
// `paginate_links` works with the global $wp_query, so we have to
// temporarily switch it with our custom query.
$prev_wp_query = $wp_query;
$wp_query = $block_query;
$total = ! $max_page || $max_page > $wp_query->max_num_pages ? $wp_query->max_num_pages : $max_page;
$paginate_args = array(
'base' => '%_%',
'format' => "?$page_key=%#%",
'current' => max( 1, $page ),
'total' => $total,
'prev_next' => false,
);
if ( 1 !== $page ) {
/**
* `paginate_links` doesn't use the provided `format` when the page is `1`.
* This is great for the main query as it removes the extra query params
* making the URL shorter, but in the case of multiple custom queries is
* problematic. It results in returning an empty link which ends up with
* a link to the current page.
*
* A way to address this is to add a `fake` query arg with no value that
* is the same for all custom queries. This way the link is not empty and
* preserves all the other existent query args.
*
* @see https://developer.wordpress.org/reference/functions/paginate_links/
*
* The proper fix of this should be in core. Track Ticket:
* @see https://core.trac.wordpress.org/ticket/53868
*
* TODO: After two WP versions (starting from the WP version the core patch landed),
* we should remove this and call `paginate_links` with the proper new arg.
*/
$paginate_args['add_args'] = array( 'cst' => '' );
}
// We still need to preserve `paged` query param if exists, as is used
// for Queries that inherit from global context.
$paged = empty( $_GET['paged'] ) ? null : (int) $_GET['paged'];
if ( $paged ) {
$paginate_args['add_args'] = array( 'paged' => $paged );
}
$content = paginate_links( $paginate_args );
wp_reset_postdata(); // Restore original Post Data.
$wp_query = $prev_wp_query;
}
if ( empty( $content ) ) {
return '';
}
return sprintf(
'<div %1$s>%2$s</div>',
$wrapper_attributes,
$content
);
}
/**
* Registers the `core/query-pagination-numbers` block on the server.
*/
function register_block_core_query_pagination_numbers() {
register_block_type_from_metadata(
__DIR__ . '/query-pagination-numbers',
array(
'render_callback' => 'render_block_core_query_pagination_numbers',
)
);
}
add_action( 'init', 'register_block_core_query_pagination_numbers' );