<?php
/**
* Server-side rendering of the `core/query-no-results` block.
*
* @package WordPress
*/

/**
* Renders the `core/query-no-results` block on the server.
*
* @since 6.0.0
*
* @global WP_Query $wp_query WordPress Query object.
*
* @param array $attributes Block attributes.
* @param string $content Block default content.
* @param WP_Block $block Block instance.
*
* @return string Returns the wrapper for the no results block.
*/
function render_block_core_query_no_results( $attributes, $content, $block ) {
if ( empty( trim( $content ) ) ) {
return '';
}

$page_key = isset( $block->context['queryId'] ) ? 'query-' . $block->context['queryId'] . '-page' : 'query-page';
$page = empty( $_GET[ $page_key ] ) ? 1 : (int) $_GET[ $page_key ];

// Override the custom query with the global query if needed.
$use_global_query = ( isset( $block->context['query']['inherit'] ) && $block->context['query']['inherit'] );
if ( $use_global_query ) {
global $wp_query;
$query = $wp_query;
} else {
$query_args = build_query_vars_from_query_block( $block, $page );
$query = new WP_Query( $query_args );
}

if ( $query->post_count > 0 ) {
return '';
}

$classes = ( isset( $attributes['style']['elements']['link']['color']['text'] ) ) ? 'has-link-color' : '';
$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => $classes ) );
return sprintf(
'<div %1$s>%2$s</div>',
$wrapper_attributes,
$content
);
}

/**
* Registers the `core/query-no-results` block on the server.
*
* @since 6.0.0
*/
function register_block_core_query_no_results() {
register_block_type_from_metadata(
__DIR__ . '/query-no-results',
array(
'render_callback' => 'render_block_core_query_no_results',
)
);
}
add_action( 'init', 'register_block_core_query_no_results' );