<?php

/**

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

 *

 * @package WordPress

 */

/**

 * Renders the `core/template-part` block on the server.

 *

 * @param array $attributes The block attributes.

 *

 * @return string The render.

 */

function render_block_core_template_part( $attributes ) {

	static $seen_ids = array();

	$template_part_id = null;

	$content          = null;

	$area             = WP_TEMPLATE_PART_AREA_UNCATEGORIZED;

	if (

		isset( $attributes['slug'] ) &&

		isset( $attributes['theme'] ) &&

		wp_get_theme()->get_stylesheet() === $attributes['theme']

	) {

		$template_part_id    = $attributes['theme'] . '//' . $attributes['slug'];

		$template_part_query = new WP_Query(

			array(

				'post_type'      => 'wp_template_part',

				'post_status'    => 'publish',

				'post_name__in'  => array( $attributes['slug'] ),

				'tax_query'      => array(

					array(

						'taxonomy' => 'wp_theme',

						'field'    => 'slug',

						'terms'    => $attributes['theme'],

					),

				),

				'posts_per_page' => 1,

				'no_found_rows'  => true,

			)

		);

		$template_part_post  = $template_part_query->have_posts() ? $template_part_query->next_post() : null;

		if ( $template_part_post ) {

			// A published post might already exist if this template part was customized elsewhere

			// or if it's part of a customized template.

			$content    = $template_part_post->post_content;

			$area_terms = get_the_terms( $template_part_post, 'wp_template_part_area' );

			if ( ! is_wp_error( $area_terms ) && false !== $area_terms ) {

				$area = $area_terms[0]->name;

			}

			/**

			 * Fires when a block template part is loaded from a template post stored in the database.

			 *

			 * @since 5.9.0

			 *

			 * @param string  $template_part_id   The requested template part namespaced to the theme.

			 * @param array   $attributes         The block attributes.

			 * @param WP_Post $template_part_post The template part post object.

			 * @param string  $content            The template part content.

			 */

			do_action( 'render_block_core_template_part_post', $template_part_id, $attributes, $template_part_post, $content );

		} else {

			// Else, if the template part was provided by the active theme,

			// render the corresponding file content.

			$parent_theme_folders        = get_block_theme_folders( get_template() );

			$child_theme_folders         = get_block_theme_folders( get_stylesheet() );

			$child_theme_part_file_path  = get_theme_file_path( '/' . $child_theme_folders['wp_template_part'] . '/' . $attributes['slug'] . '.html' );

			$parent_theme_part_file_path = get_theme_file_path( '/' . $parent_theme_folders['wp_template_part'] . '/' . $attributes['slug'] . '.html' );

			$template_part_file_path     = 0 === validate_file( $attributes['slug'] ) && file_exists( $child_theme_part_file_path ) ? $child_theme_part_file_path : $parent_theme_part_file_path;

			if ( 0 === validate_file( $attributes['slug'] ) && file_exists( $template_part_file_path ) ) {

				$content = file_get_contents( $template_part_file_path );

				$content = is_string( $content ) && '' !== $content

						? _inject_theme_attribute_in_block_template_content( $content )

						: '';

			}

			if ( '' !== $content && null !== $content ) {

				/**

				 * Fires when a block template part is loaded from a template part in the theme.

				 *

				 * @since 5.9.0

				 *

				 * @param string $template_part_id        The requested template part namespaced to the theme.

				 * @param array  $attributes              The block attributes.

				 * @param string $template_part_file_path Absolute path to the template path.

				 * @param string $content                 The template part content.

				 */

				do_action( 'render_block_core_template_part_file', $template_part_id, $attributes, $template_part_file_path, $content );

			} else {

				/**

				 * Fires when a requested block template part does not exist in the database nor in the theme.

				 *

				 * @since 5.9.0

				 *

				 * @param string $template_part_id        The requested template part namespaced to the theme.

				 * @param array  $attributes              The block attributes.

				 * @param string $template_part_file_path Absolute path to the not found template path.

				 */

				do_action( 'render_block_core_template_part_none', $template_part_id, $attributes, $template_part_file_path );

			}

		}

	}

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

	// is set in `wp_debug_mode()`.

	$is_debug = defined( 'WP_DEBUG' ) && WP_DEBUG &&

		defined( 'WP_DEBUG_DISPLAY' ) && WP_DEBUG_DISPLAY;

	if ( is_null( $content ) && $is_debug ) {

		if ( ! isset( $attributes['slug'] ) ) {

			// If there is no slug this is a placeholder and we dont want to return any message.

			return;

		}

		return sprintf(

			/* translators: %s: Template part slug. */

			__( 'Template part has been deleted or is unavailable: %s' ),

			$attributes['slug']

		);

	}

	if ( isset( $seen_ids[ $template_part_id ] ) ) {

		return $is_debug ?

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

			__( '[block rendering halted]' ) :

			'';

	}

	// Run through the actions that are typically taken on the_content.

	$seen_ids[ $template_part_id ] = true;

	$content                       = do_blocks( $content );

	unset( $seen_ids[ $template_part_id ] );

	$content = wptexturize( $content );

	$content = convert_smilies( $content );

	$content = shortcode_unautop( $content );

	$content = wp_filter_content_tags( $content );

	$content = do_shortcode( $content );

	// Handle embeds for block template parts.

	global $wp_embed;

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

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

		$defined_areas = get_allowed_block_template_part_areas();

		$area_tag      = 'div';

		foreach ( $defined_areas as $defined_area ) {

			if ( $defined_area['area'] === $area && isset( $defined_area['area_tag'] ) ) {

				$area_tag = $defined_area['area_tag'];

			}

		}

		$html_tag = $area_tag;

	} else {

		$html_tag = esc_attr( $attributes['tagName'] );

	}

	$wrapper_attributes = get_block_wrapper_attributes();

	return "<$html_tag $wrapper_attributes>" . str_replace( ']]>', ']]&gt;', $content ) . "</$html_tag>";

}

/**

 * Returns an array of variation objects for the template part block.

 *

 * @return array Array containing the block variation objects.

 */

function build_template_part_block_variations() {

	$variations    = array();

	$defined_areas = get_allowed_block_template_part_areas();

	foreach ( $defined_areas as $area ) {

		if ( 'uncategorized' !== $area['area'] ) {

			$variations[] = array(

				'name'        => $area['area'],

				'title'       => $area['label'],

				'description' => $area['description'],

				'attributes'  => array(

					'area' => $area['area'],

				),

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

				'icon'        => $area['icon'],

			);

		}

	}

	return $variations;

}

/**

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

 */

function register_block_core_template_part() {

	register_block_type_from_metadata(

		__DIR__ . '/template-part',

		array(

			'render_callback' => 'render_block_core_template_part',

			'variations'      => build_template_part_block_variations(),

		)

	);

}

add_action( 'init', 'register_block_core_template_part' );