1<?php
  2/**
  3 * Server-side rendering of the `core/query-no-results` block.
  4 *
  5 * @package WordPress
  6 */
  7
  8/**
  9 * Renders the `core/query-no-results` block on the server.
 10 *
 11 * @since 6.0.0
 12 *
 13 * @global WP_Query $wp_query WordPress Query object.
 14 *
 15 * @param array    $attributes Block attributes.
 16 * @param string   $content    Block default content.
 17 * @param WP_Block $block      Block instance.
 18 *
 19 * @return string Returns the wrapper for the no results block.
 20 */
 21function render_block_core_query_no_results( $attributes, $content, $block ) {
 22	if ( empty( trim( $content ) ) ) {
 23		return '';
 24	}
 25
 26	$page_key = isset( $block->context['queryId'] ) ? 'query-' . $block->context['queryId'] . '-page' : 'query-page';
 27	$page     = empty( $_GET[ $page_key ] ) ? 1 : (int) $_GET[ $page_key ];
 28
 29	// Override the custom query with the global query if needed.
 30	$use_global_query = ( isset( $block->context['query']['inherit'] ) && $block->context['query']['inherit'] );
 31	if ( $use_global_query ) {
 32		global $wp_query;
 33		$query = $wp_query;
 34	} else {
 35		$query_args = build_query_vars_from_query_block( $block, $page );
 36		$query      = new WP_Query( $query_args );
 37	}
 38
 39	if ( $query->post_count > 0 ) {
 40		return '';
 41	}
 42
 43	$classes            = ( isset( $attributes['style']['elements']['link']['color']['text'] ) ) ? 'has-link-color' : '';
 44	$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => $classes ) );
 45	return sprintf(
 46		'<div %1$s>%2$s</div>',
 47		$wrapper_attributes,
 48		$content
 49	);
 50}
 51
 52/**
 53 * Registers the `core/query-no-results` block on the server.
 54 *
 55 * @since 6.0.0
 56 */
 57function register_block_core_query_no_results() {
 58	register_block_type_from_metadata(
 59		__DIR__ . '/query-no-results',
 60		array(
 61			'render_callback' => 'render_block_core_query_no_results',
 62		)
 63	);
 64}
 65add_action( 'init', 'register_block_core_query_no_results' );
 66