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<?php

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/**

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* Server-side rendering of the `core/query-pagination-numbers` block.

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* @package WordPress

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/**

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* Renders the `core/query-pagination-numbers` block on the server.

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* @since 5.8.0

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* @global WP_Query $wp_query WordPress Query object.

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* @param array $attributes Block attributes.

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* @param string $content Block default content.

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* @param WP_Block $block Block instance.

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* @return string Returns the pagination numbers for the Query.

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function render_block_core_query_pagination_numbers( $attributes, $content, $block ) {

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$page_key = isset( $block->context['queryId'] ) ? 'query-' . $block->context['queryId'] . '-page' : 'query-page';

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$enhanced_pagination = isset( $block->context['enhancedPagination'] ) && $block->context['enhancedPagination'];

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$page = empty( $_GET[ $page_key ] ) ? 1 : (int) $_GET[ $page_key ];

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$max_page = isset( $block->context['query']['pages'] ) ? (int) $block->context['query']['pages'] : 0;

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$wrapper_attributes = get_block_wrapper_attributes();

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$content = '';

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global $wp_query;

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$mid_size = isset( $block->attributes['midSize'] ) ? (int) $block->attributes['midSize'] : null;

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if ( isset( $block->context['query']['inherit'] ) && $block->context['query']['inherit'] ) {

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// Take into account if we have set a bigger `max page`

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// than what the query has.

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$total = ! $max_page || $max_page > $wp_query->max_num_pages ? $wp_query->max_num_pages : $max_page;

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$paginate_args = array(

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'prev_next' => false,

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'total' => $total,

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);

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if ( null !== $mid_size ) {

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$paginate_args['mid_size'] = $mid_size;

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}

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$content = paginate_links( $paginate_args );

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} else {

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$block_query = new WP_Query( build_query_vars_from_query_block( $block, $page ) );

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// `paginate_links` works with the global $wp_query, so we have to

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// temporarily switch it with our custom query.

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$prev_wp_query = $wp_query;

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$wp_query = $block_query;

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$total = ! $max_page || $max_page > $wp_query->max_num_pages ? $wp_query->max_num_pages : $max_page;

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$paginate_args = array(

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'base' => '%_%',

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'format' => "?$page_key=%#%",

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'current' => max( 1, $page ),

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'total' => $total,

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'prev_next' => false,

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);

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if ( null !== $mid_size ) {

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$paginate_args['mid_size'] = $mid_size;

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}

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if ( 1 !== $page ) {

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/**

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* `paginate_links` doesn't use the provided `format` when the page is `1`.

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* This is great for the main query as it removes the extra query params

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* making the URL shorter, but in the case of multiple custom queries is

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* problematic. It results in returning an empty link which ends up with

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* a link to the current page.

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* A way to address this is to add a `fake` query arg with no value that

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* is the same for all custom queries. This way the link is not empty and

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* preserves all the other existent query args.

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* @see https://developer.wordpress.org/reference/functions/paginate_links/

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* The proper fix of this should be in core. Track Ticket:

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* @see https://core.trac.wordpress.org/ticket/53868

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* TODO: After two WP versions (starting from the WP version the core patch landed),

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* we should remove this and call `paginate_links` with the proper new arg.

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$paginate_args['add_args'] = array( 'cst' => '' );

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}

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// We still need to preserve `paged` query param if exists, as is used

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// for Queries that inherit from global context.

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$paged = empty( $_GET['paged'] ) ? null : (int) $_GET['paged'];

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if ( $paged ) {

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$paginate_args['add_args'] = array( 'paged' => $paged );

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}

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$content = paginate_links( $paginate_args );

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wp_reset_postdata(); // Restore original Post Data.

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$wp_query = $prev_wp_query;

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}

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if ( empty( $content ) ) {

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return '';

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}

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if ( $enhanced_pagination ) {

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$p = new WP_HTML_Tag_Processor( $content );

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$tag_index = 0;

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while ( $p->next_tag(

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array( 'class_name' => 'page-numbers' )

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) ) {

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if ( null === $p->get_attribute( 'data-wp-key' ) ) {

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$p->set_attribute( 'data-wp-key', 'index-' . $tag_index++ );

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}

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if ( 'A' === $p->get_tag() ) {

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$p->set_attribute( 'data-wp-on--click', 'core/query::actions.navigate' );

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}

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}

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$content = $p->get_updated_html();

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}

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return sprintf(

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'<div %1$s>%2$s</div>',

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$wrapper_attributes,

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$content

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);

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}

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/**

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* Registers the `core/query-pagination-numbers` block on the server.

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* @since 5.8.0

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function register_block_core_query_pagination_numbers() {

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register_block_type_from_metadata(

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__DIR__ . '/query-pagination-numbers',

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array(

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'render_callback' => 'render_block_core_query_pagination_numbers',

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)

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);

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}

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add_action( 'init', 'register_block_core_query_pagination_numbers' );

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