<?php

/**

 * Server-side rendering of the `core/post-terms` block.

 *

 * @package WordPress

 */

/**

 * Renders the `core/post-terms` block on the server.

 *

 * @param array    $attributes Block attributes.

 * @param string   $content    Block default content.

 * @param WP_Block $block      Block instance.

 * @return string Returns the filtered post terms for the current post wrapped inside "a" tags.

 */

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

	if ( ! isset( $block->context['postId'] ) || ! isset( $attributes['term'] ) ) {

		return '';

	}

	if ( ! is_taxonomy_viewable( $attributes['term'] ) ) {

		return '';

	}

	$post_terms = get_the_terms( $block->context['postId'], $attributes['term'] );

	if ( is_wp_error( $post_terms ) ) {

		return '';

	}

	if ( empty( $post_terms ) ) {

		return '';

	}

	$align_class_name = empty( $attributes['textAlign'] ) ? '' : ' ' . "has-text-align-{$attributes['textAlign']}";

	$terms_links = '';

	foreach ( $post_terms as $term ) {

		$terms_links .= sprintf(

			'<a href="%1$s">%2$s</a> | ',

			get_term_link( $term->term_id ),

			esc_html( $term->name )

		);

	}

	$terms_links        = trim( $terms_links, ' | ' );

	$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => $align_class_name ) );

	return sprintf(

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

		$wrapper_attributes,

		$terms_links

	);

}

/**

 * Registers the `core/post-terms` block on the server.

 */

function register_block_core_post_terms() {

	register_block_type_from_metadata(

		__DIR__ . '/post-terms',

		array(

			'render_callback' => 'render_block_core_post_terms',

		)

	);

}

add_action( 'init', 'register_block_core_post_terms' );