<?php

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/**

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* Server-side rendering of the `core/term-template` 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/term-template` block on the server.

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*

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* @since 6.9.0

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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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*

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* @return string Returns the output of the term template.

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*/

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

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if ( ! isset( $block->context ) || empty( $block->context['termQuery'] ) ) {

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return '';

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}

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$query = $block->context['termQuery'];

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$query_args = array(

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'number' => $query['perPage'],

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'order' => $query['order'],

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'orderby' => $query['orderBy'],

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'hide_empty' => $query['hideEmpty'],

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);

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$inherit_query = isset( $query['inherit'] )

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&& $query['inherit']

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&& ( is_tax() || is_category() || is_tag() );

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if ( $inherit_query ) {

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// Get the current term and taxonomy from the queried object.

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$queried_object = get_queried_object();

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// For hierarchical taxonomies, show children of the current term.

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// For non-hierarchical taxonomies, show all terms (don't set parent).

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if ( is_taxonomy_hierarchical( $queried_object->taxonomy ) ) {

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// If showNested is true, use child_of to include nested terms.

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// Otherwise, use parent to show only direct children.

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if ( ! empty( $query['showNested'] ) ) {

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$query_args['child_of'] = $queried_object->term_id;

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} else {

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$query_args['parent'] = $queried_object->term_id;

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}

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}

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$query_args['taxonomy'] = $queried_object->taxonomy;

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} else {

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// If not inheriting set `taxonomy` from the block attribute.

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$query_args['taxonomy'] = $query['taxonomy'];

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// If we are including specific terms we ignore `showNested` argument.

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if ( ! empty( $query['include'] ) ) {

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$query_args['include'] = array_unique( array_map( 'intval', $query['include'] ) );

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$query_args['orderby'] = 'include';

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$query_args['order'] = 'asc';

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} elseif ( is_taxonomy_hierarchical( $query['taxonomy'] ) && empty( $query['showNested'] ) ) {

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// We set parent only when inheriting from the taxonomy archive context or not

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// showing nested terms, otherwise nested terms are not displayed.

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$query_args['parent'] = 0;

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}

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}

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$terms_query = new WP_Term_Query( $query_args );

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$terms = $terms_query->get_terms();

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if ( ! $terms || is_wp_error( $terms ) ) {

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return '';

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}

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$content = '';

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foreach ( $terms as $term ) {

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// Get an instance of the current Term Template block.

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$block_instance = $block->parsed_block;

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// Set the block name to one that does not correspond to an existing registered block.

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// This ensures that for the inner instances of the Term Template block, we do not render any block supports.

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$block_instance['blockName'] = 'core/null';

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$term_id = $term->term_id;

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$taxonomy = $term->taxonomy;

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$filter_block_context = static function ( $context ) use ( $term_id, $taxonomy ) {

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$context['termId'] = $term_id;

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$context['taxonomy'] = $taxonomy;

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return $context;

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};

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// Use an early priority to so that other 'render_block_context' filters have access to the values.

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add_filter( 'render_block_context', $filter_block_context, 1 );

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// Render the inner blocks of the Term Template block with `dynamic` set to `false` to prevent calling

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// `render_callback` and ensure that no wrapper markup is included.

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$block_content = ( new WP_Block( $block_instance ) )->render( array( 'dynamic' => false ) );

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remove_filter( 'render_block_context', $filter_block_context, 1 );

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// Wrap the render inner blocks in a `li` element with the appropriate term classes.

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$term_classes = "wp-block-term term-{$term->term_id} {$term->taxonomy} taxonomy-{$term->taxonomy}";

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$content .= '<li class="' . esc_attr( $term_classes ) . '">' . $block_content . '</li>';

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}

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$classnames = '';

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

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$classnames .= 'has-link-color';

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}

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$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => trim( $classnames ) ) );

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return sprintf(

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'<ul %s>%s</ul>',

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$wrapper_attributes,

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$content

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);

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}

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/**

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* Registers the `core/term-template` block on the server.

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*

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* @since 6.9.0

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*/

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function register_block_core_term_template() {

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register_block_type_from_metadata(

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__DIR__ . '/term-template',

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array(

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'render_callback' => 'render_block_core_term_template',

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)

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);

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}

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add_action( 'init', 'register_block_core_term_template' );

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