<?php

/**

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

 *

 * @package WordPress

 */

/**

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

 *

 * @since 5.8.0

 *

 * @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 '';

	}

	$classes = array( 'taxonomy-' . $attributes['term'] );

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

		$classes[] = 'has-text-align-' . $attributes['textAlign'];

	}

	if ( isset( $attributes['style']['elements']['link']['color']['text'] ) ) {

		$classes[] = 'has-link-color';

	}

	$separator = empty( $attributes['separator'] ) ? ' ' : $attributes['separator'];

	$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => implode( ' ', $classes ) ) );

	$prefix = "<div $wrapper_attributes>";

	if ( isset( $attributes['prefix'] ) && $attributes['prefix'] ) {

		$prefix .= '<span class="wp-block-post-terms__prefix">' . $attributes['prefix'] . '</span>';

	}

	$suffix = '</div>';

	if ( isset( $attributes['suffix'] ) && $attributes['suffix'] ) {

		$suffix = '<span class="wp-block-post-terms__suffix">' . $attributes['suffix'] . '</span>' . $suffix;

	}

		$block->context['postId'],

		$attributes['term'],

		wp_kses_post( $prefix ),

		'<span class="wp-block-post-terms__separator">' . esc_html( $separator ) . '</span>',

		wp_kses_post( $suffix )

	);

}

/**

 * Returns the available variations for the `core/post-terms` block.

 *

 * @since 6.5.0

 *

 * @return array The available variations for the block.

 */

function block_core_post_terms_build_variations() {

	$taxonomies = get_taxonomies(

		array(

			'publicly_queryable' => true,

			'show_in_rest'       => true,

		),

		'objects'

	);

	// Split the available taxonomies to `built_in` and custom ones,

	// in order to prioritize the `built_in` taxonomies at the

	// search results.

	$built_ins         = array();

	$custom_variations = array();

	// Create and register the eligible taxonomies variations.

	foreach ( $taxonomies as $taxonomy ) {

		$variation = array(

			'name'        => $taxonomy->name,

			'title'       => $taxonomy->label,

			'description' => sprintf(

				/* translators: %s: taxonomy's label */

				__( 'Display a list of assigned terms from the taxonomy: %s' ),

				$taxonomy->label

			),

			'attributes'  => array(

				'term' => $taxonomy->name,

			),

			'isActive'    => array( 'term' ),

			'scope'       => array( 'inserter', 'transform' ),

		);

		// Set the category variation as the default one.

		if ( 'category' === $taxonomy->name ) {

			$variation['isDefault'] = true;

		}

		if ( $taxonomy->_builtin ) {

			$built_ins[] = $variation;

		} else {

			$custom_variations[] = $variation;

		}

	}

	return array_merge( $built_ins, $custom_variations );

}

/**

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

 *

 * @since 5.8.0

 */

function register_block_core_post_terms() {

	register_block_type_from_metadata(

		__DIR__ . '/post-terms',

		array(

			'render_callback'    => 'render_block_core_post_terms',

			'variation_callback' => 'block_core_post_terms_build_variations',

		)

	);

}

add_action( 'init', 'register_block_core_post_terms' );