<?php

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/**

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

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*

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* @package WordPress

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*/

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/**

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

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*

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* @since 5.8.0

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*

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* @param array $attributes Block attributes.

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* @param string $content Block default content.

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* @param WP_Block $block Block instance.

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

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*/

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

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

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return '';

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}

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

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return '';

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}

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

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

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

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}

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

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

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}

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

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

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$prefix = "<div $wrapper_attributes>";

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

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

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}

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$suffix = '</div>';

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

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

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}

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$post_terms = get_the_term_list(

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$block->context['postId'],

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$attributes['term'],

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wp_kses_post( $prefix ),

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

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wp_kses_post( $suffix )

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);

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if ( is_wp_error( $post_terms ) || empty( $post_terms ) ) {

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return '';

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}

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return $post_terms;

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}

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/**

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

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*

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* @since 6.5.0

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*

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* @return array The available variations for the block.

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*/

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function block_core_post_terms_build_variations() {

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$taxonomies = get_taxonomies(

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array(

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'publicly_queryable' => true,

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'show_in_rest' => true,

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),

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'objects'

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);

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

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

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// search results.

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$built_ins = array();

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$custom_variations = array();

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// Create and register the eligible taxonomies variations.

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foreach ( $taxonomies as $taxonomy ) {

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$variation = array(

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'name' => $taxonomy->name,

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'title' => $taxonomy->label,

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'description' => sprintf(

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

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

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$taxonomy->label

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),

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'attributes' => array(

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'term' => $taxonomy->name,

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),

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

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

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);

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// Set the category variation as the default one.

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

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$variation['isDefault'] = true;

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}

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if ( $taxonomy->_builtin ) {

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$built_ins[] = $variation;

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} else {

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$custom_variations[] = $variation;

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}

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}

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return array_merge( $built_ins, $custom_variations );

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}

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/**

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

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*

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* @since 5.8.0

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*/

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function register_block_core_post_terms() {

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register_block_type_from_metadata(

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__DIR__ . '/post-terms',

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array(

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'render_callback' => 'render_block_core_post_terms',

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'variation_callback' => 'block_core_post_terms_build_variations',

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)

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);

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}

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add_action( 'init', 'register_block_core_post_terms' );

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