<?php

/**

 * Server-side rendering of the `core/tag-cloud` block.

 *

 * @package WordPress

 */

/**

 * Renders the `core/tag-cloud` block on server.

 *

 * @param array $attributes The block attributes.

 *

 * @return string Returns the tag cloud for selected taxonomy.

 */

function render_block_core_tag_cloud( $attributes ) {

	$smallest_font_size = $attributes['smallestFontSize'];

	$unit               = ( preg_match( '/^[0-9.]+(?P<unit>[a-z%]+)$/i', $smallest_font_size, $m ) ? $m['unit'] : 'pt' );

	$args      = array(

		'echo'       => false,

		'unit'       => $unit,

		'taxonomy'   => $attributes['taxonomy'],

		'show_count' => $attributes['showTagCounts'],

		'number'     => $attributes['numberOfTags'],

		'smallest'   => floatVal( $attributes['smallestFontSize'] ),

		'largest'    => floatVal( $attributes['largestFontSize'] ),

	);

	$tag_cloud = wp_tag_cloud( $args );

	if ( ! $tag_cloud ) {

		$labels    = get_taxonomy_labels( get_taxonomy( $attributes['taxonomy'] ) );

		$tag_cloud = esc_html(

			sprintf(

				/* translators: %s: taxonomy name */

				__( 'Your site doesn’t have any %s, so there’s nothing to display here at the moment.' ),

				strtolower( $labels->name )

			)

		);

	}

	$wrapper_attributes = get_block_wrapper_attributes();

	return sprintf(

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

		$wrapper_attributes,

		$tag_cloud

	);

}

/**

 * Registers the `core/tag-cloud` block on server.

 */

function register_block_core_tag_cloud() {

	register_block_type_from_metadata(

		__DIR__ . '/tag-cloud',

		array(

			'render_callback' => 'render_block_core_tag_cloud',

		)

	);

}

add_action( 'init', 'register_block_core_tag_cloud' );