<?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 ) {

	$class = isset( $attributes['align'] ) ?

		"wp-block-tag-cloud align{$attributes['align']}" :

		'wp-block-tag-cloud';

	if ( isset( $attributes['className'] ) ) {

		$class .= ' ' . $attributes['className'];

	}

	$args = array(

		'echo'       => false,

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

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

	);

	$tag_cloud = wp_tag_cloud( $args );

	if ( ! $tag_cloud ) {

		$tag_cloud = esc_html( __( 'No terms to show.' ) );

	}

	return sprintf(

		'<p class="%1$s">%2$s</p>',

		esc_attr( $class ),

		$tag_cloud

	);

}

/**

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

 */

function register_block_core_tag_cloud() {

	register_block_type(

		'core/tag-cloud',

		array(

			'attributes'      => array(

				'taxonomy'      => array(

					'type'    => 'string',

					'default' => 'post_tag',

				),

				'className'     => array(

					'type' => 'string',

				),

				'showTagCounts' => array(

					'type'    => 'boolean',

					'default' => false,

				),

				'align'         => array(

					'type' => 'string',

				),

			),

			'render_callback' => 'render_block_core_tag_cloud',

		)

	);

}

add_action( 'init', 'register_block_core_tag_cloud' );