<?php

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/**

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

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*

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* @since 5.0.0

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*

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* @global WP_Embed $wp_embed

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*

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* @param array $attributes The block attributes.

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*

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* @return string Rendered HTML of the referenced block.

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*/

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function render_block_core_block( $attributes ) {

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static $seen_refs = array();

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if ( empty( $attributes['ref'] ) ) {

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return '';

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}

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$reusable_block = get_post( $attributes['ref'] );

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if ( ! $reusable_block || 'wp_block' !== $reusable_block->post_type ) {

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return '';

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}

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if ( isset( $seen_refs[ $attributes['ref'] ] ) ) {

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// WP_DEBUG_DISPLAY must only be honored when WP_DEBUG. This precedent

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// is set in `wp_debug_mode()`.

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$is_debug = WP_DEBUG && WP_DEBUG_DISPLAY;

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return $is_debug ?

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// translators: Visible only in the front end, this warning takes the place of a faulty block.

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__( '[block rendering halted]' ) :

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'';

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}

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if ( 'publish' !== $reusable_block->post_status || ! empty( $reusable_block->post_password ) ) {

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return '';

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}

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$seen_refs[ $attributes['ref'] ] = true;

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// Handle embeds for reusable blocks.

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global $wp_embed;

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$content = $wp_embed->run_shortcode( $reusable_block->post_content );

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$content = $wp_embed->autoembed( $content );

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// Back compat.

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// For blocks that have not been migrated in the editor, add some back compat

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// so that front-end rendering continues to work.

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// This matches the `v2` deprecation. Removes the inner `values` property

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// from every item.

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

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foreach ( $attributes['content'] as &$content_data ) {

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if ( isset( $content_data['values'] ) ) {

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$is_assoc_array = is_array( $content_data['values'] ) && ! wp_is_numeric_array( $content_data['values'] );

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if ( $is_assoc_array ) {

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$content_data = $content_data['values'];

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}

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}

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}

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}

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// This matches the `v1` deprecation. Rename `overrides` to `content`.

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if ( isset( $attributes['overrides'] ) && ! isset( $attributes['content'] ) ) {

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$attributes['content'] = $attributes['overrides'];

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}

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/**

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* We set the `pattern/overrides` context through the `render_block_context`

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* filter so that it is available when a pattern's inner blocks are

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* rendering via do_blocks given it only receives the inner content.

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*/

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$has_pattern_overrides = isset( $attributes['content'] ) && null !== get_block_bindings_source( 'core/pattern-overrides' );

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if ( $has_pattern_overrides ) {

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$filter_block_context = static function ( $context ) use ( $attributes ) {

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$context['pattern/overrides'] = $attributes['content'];

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return $context;

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};

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

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}

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// Apply Block Hooks.

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$content = apply_block_hooks_to_content_from_post_object( $content, $reusable_block );

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$content = do_blocks( $content );

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unset( $seen_refs[ $attributes['ref'] ] );

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if ( $has_pattern_overrides ) {

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

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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/block` block.

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*

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* @since 5.3.0

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*/

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function register_block_core_block() {

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register_block_type_from_metadata(

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__DIR__ . '/block',

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array(

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'render_callback' => 'render_block_core_block',

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)

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);

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}

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add_action( 'init', 'register_block_core_block' );

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