<?php

/**

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

 *

 * @package WordPress

 */

/**

 * Renders the `core/block` block on server.

 *

 * @since 5.0.0

 *

 * @global WP_Embed $wp_embed

 *

 * @param array $attributes The block attributes.

 *

 * @return string Rendered HTML of the referenced block.

 */

function render_block_core_block( $attributes ) {

	static $seen_refs = array();

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

		return '';

	}

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

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

		return '';

	}

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

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

		// is set in `wp_debug_mode()`.

		$is_debug = WP_DEBUG && WP_DEBUG_DISPLAY;

		return $is_debug ?

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

			__( '[block rendering halted]' ) :

			'';

	}

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

		return '';

	}

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

	// Handle embeds for reusable blocks.

	global $wp_embed;

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

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

	// Back compat.

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

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

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

	// from every item.

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

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

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

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

				if ( $is_assoc_array ) {

					$content_data = $content_data['values'];

				}

			}

		}

	}

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

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

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

	}

	/**

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

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

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

	 */

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

	if ( $has_pattern_overrides ) {

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

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

			return $context;

		};

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

	}

	// Apply Block Hooks.

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

	$content = do_blocks( $content );

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

	if ( $has_pattern_overrides ) {

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

	}

	return $content;

}

/**

 * Registers the `core/block` block.

 *

 * @since 5.3.0

 */

function register_block_core_block() {

	register_block_type_from_metadata(

		__DIR__ . '/block',

		array(

			'render_callback' => 'render_block_core_block',

		)

	);

}

add_action( 'init', 'register_block_core_block' );