<?php

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/**

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

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*

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* @package WordPress

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*/

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/**

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* Modifies the static `core/query` block on the server.

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*

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* @since 6.4.0

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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 The block instance.

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*

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* @return string Returns the modified output of the query block.

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*/

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

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$is_interactive = isset( $attributes['enhancedPagination'] )

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&& true === $attributes['enhancedPagination']

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&& isset( $attributes['queryId'] );

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// Enqueue the script module and add the necessary directives if the block is

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// interactive.

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if ( $is_interactive ) {

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wp_enqueue_script_module( '@wordpress/block-library/query/view' );

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$p = new WP_HTML_Tag_Processor( $content );

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if ( $p->next_tag() ) {

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// Add the necessary directives.

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$p->set_attribute( 'data-wp-interactive', 'core/query' );

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$p->set_attribute( 'data-wp-router-region', 'query-' . $attributes['queryId'] );

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$p->set_attribute( 'data-wp-context', '{}' );

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$p->set_attribute( 'data-wp-key', $attributes['queryId'] );

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$content = $p->get_updated_html();

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}

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}

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// Add the styles to the block type if the block is interactive and remove

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// them if it's not.

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$style_asset = 'wp-block-query';

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if ( ! wp_style_is( $style_asset ) ) {

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$style_handles = $block->block_type->style_handles;

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// If the styles are not needed, and they are still in the `style_handles`, remove them.

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if ( ! $is_interactive && in_array( $style_asset, $style_handles, true ) ) {

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$block->block_type->style_handles = array_diff( $style_handles, array( $style_asset ) );

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}

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// If the styles are needed, but they were previously removed, add them again.

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if ( $is_interactive && ! in_array( $style_asset, $style_handles, true ) ) {

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$block->block_type->style_handles = array_merge( $style_handles, array( $style_asset ) );

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}

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}

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return $content;

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}

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/**

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* Registers the `core/query` 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_query() {

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register_block_type_from_metadata(

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__DIR__ . '/query',

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array(

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'render_callback' => 'render_block_core_query',

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)

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);

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}

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add_action( 'init', 'register_block_core_query' );

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/**

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* Traverse the tree of blocks looking for any plugin block (i.e., a block from

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* an installed plugin) inside a Query block with the enhanced pagination

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* enabled. If at least one is found, the enhanced pagination is effectively

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* disabled to prevent any potential incompatibilities.

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*

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* @since 6.4.0

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*

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* @param array $parsed_block The block being rendered.

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* @return array Returns the parsed block, unmodified.

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*/

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function block_core_query_disable_enhanced_pagination( $parsed_block ) {

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static $enhanced_query_stack = array();

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static $dirty_enhanced_queries = array();

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static $render_query_callback = null;

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$block_name = $parsed_block['blockName'];

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$block_type = WP_Block_Type_Registry::get_instance()->get_registered( $block_name );

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$has_enhanced_pagination = isset( $parsed_block['attrs']['enhancedPagination'] ) && true === $parsed_block['attrs']['enhancedPagination'] && isset( $parsed_block['attrs']['queryId'] );

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/*

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* Client side navigation can be true in two states:

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* - supports.interactivity = true;

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* - supports.interactivity.clientNavigation = true;

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*/

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$supports_client_navigation = ( isset( $block_type->supports['interactivity']['clientNavigation'] ) && true === $block_type->supports['interactivity']['clientNavigation'] )

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|| ( isset( $block_type->supports['interactivity'] ) && true === $block_type->supports['interactivity'] );

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if ( 'core/query' === $block_name && $has_enhanced_pagination ) {

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$enhanced_query_stack[] = $parsed_block['attrs']['queryId'];

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if ( ! isset( $render_query_callback ) ) {

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/**

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* Filter that disables the enhanced pagination feature during block

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* rendering when a plugin block has been found inside. It does so

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* by adding an attribute called `data-wp-navigation-disabled` which

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* is later handled by the front-end logic.

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*

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* @param string $content The block content.

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* @param array $block The full block, including name and attributes.

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* @return string Returns the modified output of the query block.

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*/

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$render_query_callback = static function ( $content, $block ) use ( &$enhanced_query_stack, &$dirty_enhanced_queries, &$render_query_callback ) {

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$has_enhanced_pagination = isset( $block['attrs']['enhancedPagination'] ) && true === $block['attrs']['enhancedPagination'] && isset( $block['attrs']['queryId'] );

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if ( ! $has_enhanced_pagination ) {

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return $content;

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}

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if ( isset( $dirty_enhanced_queries[ $block['attrs']['queryId'] ] ) ) {

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// Disable navigation in the router store config.

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wp_interactivity_config( 'core/router', array( 'clientNavigationDisabled' => true ) );

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$dirty_enhanced_queries[ $block['attrs']['queryId'] ] = null;

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}

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array_pop( $enhanced_query_stack );

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if ( empty( $enhanced_query_stack ) ) {

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remove_filter( 'render_block_core/query', $render_query_callback );

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$render_query_callback = null;

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}

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return $content;

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};

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add_filter( 'render_block_core/query', $render_query_callback, 10, 2 );

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}

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} elseif (

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! empty( $enhanced_query_stack ) &&

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isset( $block_name ) &&

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( ! $supports_client_navigation )

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) {

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foreach ( $enhanced_query_stack as $query_id ) {

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$dirty_enhanced_queries[ $query_id ] = true;

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}

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}

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return $parsed_block;

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}

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add_filter( 'render_block_data', 'block_core_query_disable_enhanced_pagination', 10, 1 );

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