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<?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' => 'name',
'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.
$content = shortcode_unautop( $content );
$content = do_shortcode( $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 = wp_filter_content_tags( $content );
// Handle embeds for block template parts.
global $wp_embed;
$content = $wp_embed->autoembed( $content );
if ( empty( $attributes['tagName'] ) || tag_escape( $attributes['tagName'] ) !== $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( ']]>', ']]>', $content ) . "</$html_tag>";
}
/**
* Returns an array of area variation objects for the template part block.
*
* @return array Array containing the block variation objects.
*/
function build_template_part_block_area_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;
}
/**
* Returns an array of instance variation objects for the template part block
*
* @return array Array containing the block variation objects.
*/
function build_template_part_block_instance_variations() {
// Block themes are unavailable during installation.
if ( wp_installing() ) {
return array();
}
if ( ! current_theme_supports( 'block-templates' ) && ! current_theme_supports( 'block-template-parts' ) ) {
return array();
}
$variations = array();
$template_parts = get_block_templates(
array(
'post_type' => 'wp_template_part',
),
'wp_template_part'
);
$defined_areas = get_allowed_block_template_part_areas();
$icon_by_area = array_combine( array_column( $defined_areas, 'area' ), array_column( $defined_areas, 'icon' ) );
foreach ( $template_parts as $template_part ) {
$variations[] = array(
'name' => sanitize_title( $template_part->slug ),
'title' => $template_part->title,
// If there's no description for the template part don't show the
// block description. This is a bit hacky, but prevent the fallback
// by using a non-breaking space so that the value of description
// isn't falsey.
'description' => $template_part->description || ' ',
'attributes' => array(
'slug' => $template_part->slug,
'theme' => $template_part->theme,
'area' => $template_part->area,
),
'scope' => array( 'inserter' ),
'icon' => $icon_by_area[ $template_part->area ],
'example' => array(
'attributes' => array(
'slug' => $template_part->slug,
'theme' => $template_part->theme,
'area' => $template_part->area,
),
),
);
}
return $variations;
}
/**
* Returns an array of all template part block variations.
*
* @return array Array containing the block variation objects.
*/
function build_template_part_block_variations() {
return array_merge( build_template_part_block_area_variations(), build_template_part_block_instance_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' );