FM / blocks

/home/techb158/dev.aleamaralawal.com/wp-includes/blocks/

/home/techb158/dev.aleamaralawal.com/wp-includes/blocks

Name	Size	Mode	Actions
accordion/	-	0755	rm
accordion-heading/	-	0755	rm
accordion-item/	-	0755	rm
accordion-panel/	-	0755	rm
archives/	-	0755	rm
audio/	-	0755	rm
avatar/	-	0755	rm
block/	-	0755	rm
breadcrumbs/	-	0755	rm
button/	-	0755	rm
buttons/	-	0755	rm
calendar/	-	0755	rm
categories/	-	0755	rm
code/	-	0755	rm
column/	-	0755	rm
columns/	-	0755	rm
comment-author-name/	-	0755	rm
comment-content/	-	0755	rm
comment-date/	-	0755	rm
comment-edit-link/	-	0755	rm
comment-reply-link/	-	0755	rm
comment-template/	-	0755	rm
comments/	-	0755	rm
comments-pagination/	-	0755	rm
comments-pagination-next/	-	0755	rm
comments-pagination-numbers/	-	0755	rm
comments-pagination-previous/	-	0755	rm
comments-title/	-	0755	rm
cover/	-	0755	rm
details/	-	0755	rm
embed/	-	0755	rm
file/	-	0755	rm
footnotes/	-	0755	rm
freeform/	-	0755	rm
gallery/	-	0755	rm
group/	-	0755	rm
heading/	-	0755	rm
home-link/	-	0755	rm
html/	-	0755	rm
icon/	-	0755	rm
image/	-	0755	rm
latest-comments/	-	0755	rm
latest-posts/	-	0755	rm
legacy-widget/	-	0755	rm
list/	-	0755	rm
list-item/	-	0755	rm
loginout/	-	0755	rm
math/	-	0755	rm
media-text/	-	0755	rm
missing/	-	0755	rm
more/	-	0755	rm
navigation/	-	0755	rm
navigation-link/	-	0755	rm
navigation-overlay-close/	-	0755	rm
navigation-submenu/	-	0755	rm
nextpage/	-	0755	rm
page-list/	-	0755	rm
page-list-item/	-	0755	rm
paragraph/	-	0755	rm
pattern/	-	0755	rm
playlist/	-	0755	rm
playlist-track/	-	0755	rm
post-author/	-	0755	rm
post-author-biography/	-	0755	rm
post-author-name/	-	0755	rm
post-comments-count/	-	0755	rm
post-comments-form/	-	0755	rm
post-comments-link/	-	0755	rm
post-content/	-	0755	rm
post-date/	-	0755	rm
post-excerpt/	-	0755	rm
post-featured-image/	-	0755	rm
post-navigation-link/	-	0755	rm
post-template/	-	0755	rm
post-terms/	-	0755	rm
post-time-to-read/	-	0755	rm
post-title/	-	0755	rm
preformatted/	-	0755	rm
pullquote/	-	0755	rm
query/	-	0755	rm
query-no-results/	-	0755	rm
query-pagination/	-	0755	rm
query-pagination-next/	-	0755	rm
query-pagination-numbers/	-	0755	rm
query-pagination-previous/	-	0755	rm
query-title/	-	0755	rm
query-total/	-	0755	rm
quote/	-	0755	rm
read-more/	-	0755	rm
rss/	-	0755	rm
search/	-	0755	rm
separator/	-	0755	rm
shortcode/	-	0755	rm
site-logo/	-	0755	rm
site-tagline/	-	0755	rm
site-title/	-	0755	rm
social-link/	-	0755	rm
social-links/	-	0755	rm
spacer/	-	0755	rm
tab-list/	-	0755	rm
tab-panel/	-	0755	rm
tab-panels/	-	0755	rm
table/	-	0755	rm
tabs/	-	0755	rm
tag-cloud/	-	0755	rm
template-part/	-	0755	rm
term-count/	-	0755	rm
term-description/	-	0755	rm
term-name/	-	0755	rm
term-template/	-	0755	rm
terms-query/	-	0755	rm
text-columns/	-	0755	rm
verse/	-	0755	rm
video/	-	0755	rm
widget-group/	-	0755	rm
accordion-item.php	3052	0644	edit dl rm
accordion.php	1147	0644	edit dl rm
archives.php	4385	0644	edit dl rm
avatar.php	5638	0644	edit dl rm
block.php	3122	0644	edit dl rm
blocks-json.php	210661	0644	edit dl rm
breadcrumbs.php	19057	0644	edit dl rm
button.php	4211	0644	edit dl rm
calendar.php	6075	0644	edit dl rm
categories.php	4938	0644	edit dl rm
comment-author-name.php	2136	0644	edit dl rm
comment-content.php	2459	0644	edit dl rm
comment-date.php	1865	0644	edit dl rm
comment-edit-link.php	1713	0644	edit dl rm
comment-reply-link.php	2075	0644	edit dl rm
comment-template.php	4494	0644	edit dl rm
comments-pagination-next.php	1924	0644	edit dl rm
comments-pagination-numbers.php	1632	0644	edit dl rm
comments-pagination-previous.php	1790	0644	edit dl rm
comments-pagination.php	1261	0644	edit dl rm
comments-title.php	2787	0644	edit dl rm
comments.php	6784	0644	edit dl rm
cover.php	7404	0644	edit dl rm
details.php	1498	0644	edit dl rm
file.php	1879	0644	edit dl rm
footnotes.php	3818	0644	edit dl rm
gallery.php	22345	0644	edit dl rm
heading.php	1301	0644	edit dl rm
home-link.php	4703	0644	edit dl rm
icon.php	4374	0644	edit dl rm
image.php	17642	0644	edit dl rm
index.php	5104	0644	edit dl rm
latest-comments.php	5622	0644	edit dl rm
latest-posts.php	10459	0644	edit dl rm
legacy-widget.php	4011	0644	edit dl rm
list.php	1273	0644	edit dl rm
loginout.php	2123	0644	edit dl rm
media-text.php	4298	0644	edit dl rm
navigation-link.php	16654	0644	edit dl rm
navigation-overlay-close.php	1765	0644	edit dl rm
navigation-submenu.php	11050	0644	edit dl rm
navigation.php	70892	0644	edit dl rm
page-list-item.php	361	0644	edit dl rm
page-list.php	13863	0644	edit dl rm
paragraph.php	1139	0644	edit dl rm
pattern.php	1788	0644	edit dl rm
playlist-track.php	2487	0644	edit dl rm
playlist.php	6616	0644	edit dl rm
post-author-biography.php	1524	0644	edit dl rm
post-author-name.php	1962	0644	edit dl rm
post-author.php	2734	0644	edit dl rm
post-comments-count.php	1275	0644	edit dl rm
post-comments-form.php	2805	0644	edit dl rm
post-comments-link.php	2237	0644	edit dl rm
post-content.php	2668	0644	edit dl rm
post-date.php	3692	0644	edit dl rm
post-excerpt.php	4315	0644	edit dl rm
post-featured-image.php	9452	0644	edit dl rm
post-navigation-link.php	4807	0644	edit dl rm
post-template.php	5940	0644	edit dl rm
post-terms.php	3640	0644	edit dl rm
post-time-to-read.php	6411	0644	edit dl rm
post-title.php	2138	0644	edit dl rm
query-no-results.php	1847	0644	edit dl rm
query-pagination-next.php	3676	0644	edit dl rm
query-pagination-numbers.php	4700	0644	edit dl rm
query-pagination-previous.php	3473	0644	edit dl rm
query-pagination.php	1176	0644	edit dl rm
query-title.php	2771	0644	edit dl rm
query-total.php	2471	0644	edit dl rm
query.php	5690	0644	edit dl rm
read-more.php	1846	0644	edit dl rm
require-dynamic-blocks.php	5256	0644	edit dl rm
require-static-blocks.php	535	0644	edit dl rm
rss.php	4609	0644	edit dl rm
search.php	25600	0644	edit dl rm
shortcode.php	735	0644	edit dl rm
site-logo.php	6334	0644	edit dl rm
site-tagline.php	1203	0644	edit dl rm
site-title.php	1864	0644	edit dl rm
social-link.php	67602	0644	edit dl rm
tab-list.php	2322	0644	edit dl rm
tab-panel.php	1669	0644	edit dl rm
tabs.php	3949	0644	edit dl rm
tag-cloud.php	1586	0644	edit dl rm
template-part.php	9964	0644	edit dl rm
term-count.php	1843	0644	edit dl rm
term-description.php	1770	0644	edit dl rm
term-name.php	2038	0644	edit dl rm
term-template.php	4518	0644	edit dl rm
video.php	2733	0644	edit dl rm
widget-group.php	2438	0644	edit dl rm

Edit: /home/techb158/dev.aleamaralawal.com/wp-includes/blocks/navigation.php (70892B)

<?php
/**
 * Server-side rendering of the `core/navigation` block.
 *
 * @package WordPress
 */

/**
 * Returns the submenu visibility value with backward compatibility
 * for the deprecated openSubmenusOnClick attribute.
 *
 * This function centralizes the migration logic from the boolean
 * openSubmenusOnClick to the new submenuVisibility enum.
 *
 * Backward compatibility: WordPress applies default attribute values, so submenuVisibility
 * will always have a value even for legacy blocks. We check the legacy openSubmenusOnClick
 * attribute first to preserve original behavior for blocks saved before the migration.
 *
 * @since 7.0.0
 *
 * @param array $attributes Block attributes containing submenuVisibility and/or openSubmenusOnClick.
 * @return string The visibility mode: 'hover', 'click', or 'always'.
 */
function block_core_navigation_get_submenu_visibility( $attributes ) {
	$deprecated_open_submenus_on_click = $attributes['openSubmenusOnClick'] ?? null;

// For backward compatibility, prioritize the legacy attribute if present.
	// Legacy blocks have openSubmenusOnClick in the database. Since WordPress applies
	// default values, submenuVisibility will also have a value, but we check the legacy
	// attribute first to preserve the original behavior. If the block has been updated
	// and saved in the editor, then the deprecated attribute will be replaced by submenuVisibility.
	if ( null !== $deprecated_open_submenus_on_click ) {
		// Convert boolean to string: true -> 'click', false -> 'hover'.
		return ! empty( $deprecated_open_submenus_on_click ) ? 'click' : 'hover';
	}

$submenu_visibility = $attributes['submenuVisibility'] ?? null;

// Use submenuVisibility for migrated/new blocks (where openSubmenusOnClick is null).
	return $submenu_visibility ?? 'hover';
}

/**
 * Returns the custom properties used by the Navigation block for a layout.
 *
 * @since 7.1.0
 *
 * @param array $layout Layout configuration.
 * @return array Navigation layout custom property declarations.
 */
function block_core_navigation_get_layout_custom_property_declarations( $layout ) {
	$justification_values = array(
		'left'          => 'flex-start',
		'center'        => 'center',
		'right'         => 'flex-end',
		'space-between' => 'space-between',
	);
	$justify_content      = is_array( $layout ) ? ( $layout['justifyContent'] ?? 'left' ) : 'left';
	if ( ! is_string( $justify_content ) || ! isset( $justification_values[ $justify_content ] ) ) {
		$justify_content = 'left';
	}

$justification = $justification_values[ $justify_content ];
	$is_vertical   = is_array( $layout ) && 'vertical' === ( $layout['orientation'] ?? null );
	$align         = 'center';
	$justify       = $justification;

if ( $is_vertical ) {
		$align   = in_array( $justify_content, array( 'center', 'right' ), true ) ? $justification : 'flex-start';
		$justify = 'left' === $justify_content ? 'initial' : $justification;
	}

return array(
		'--navigation-layout-justification-setting' => $justification,
		'--navigation-layout-direction'             => $is_vertical ? 'column' : 'row',
		'--navigation-layout-wrap'                  => is_array( $layout ) && 'nowrap' === ( $layout['flexWrap'] ?? null ) ? 'nowrap' : 'wrap',
		'--navigation-layout-justify'               => $justify,
		'--navigation-layout-align'                 => $align,
	);
}

/**
 * Helper functions used to render the navigation block.
 *
 * @since 6.5.0
 */
class WP_Navigation_Block_Renderer {

/**
	 * Used to determine whether or not a navigation has submenus.
	 *
	 * @since 6.5.0
	 */
	private static $has_submenus = false;

/**
	 * Used to determine which blocks need an <li> wrapper.
	 *
	 * @since 6.5.0
	 *
	 * @var array
	 */
	private static $needs_list_item_wrapper = array(
		'core/site-title',
		'core/site-logo',
		'core/social-links',
	);

/**
	 * Keeps track of all the navigation names that have been seen.
	 *
	 * @since 6.5.0
	 *
	 * @var array
	 */
	private static $seen_menu_names = array();

/**
	 * Returns whether or not this is responsive navigation.
	 *
	 * @since 6.5.0
	 *
	 * @param array $attributes The block attributes.
	 * @return bool Returns whether or not this is responsive navigation.
	 */
	private static function is_responsive( $attributes ) {
		/**
		 * This is for backwards compatibility after the `isResponsive` attribute was been removed.
		 */

$has_old_responsive_attribute = ! empty( $attributes['isResponsive'] ) && $attributes['isResponsive'];
		return isset( $attributes['overlayMenu'] ) && 'never' !== $attributes['overlayMenu'] || $has_old_responsive_attribute;
	}

/**
	 * Returns whether or not a navigation has a submenu.
	 *
	 * @since 6.5.0
	 *
	 * @param WP_Block_List $inner_blocks The list of inner blocks.
	 * @return bool Returns whether or not a navigation has a submenu and also sets the member variable.
	 */
	private static function has_submenus( $inner_blocks ) {
		if ( true === static::$has_submenus ) {
			return static::$has_submenus;
		}

foreach ( $inner_blocks as $inner_block ) {
			// If this is a page list then work out if any of the pages have children.
			if ( 'core/page-list' === $inner_block->name ) {
				$all_pages = get_pages(
					array(
						'sort_column' => 'menu_order,post_title',
						'order'       => 'asc',
					)
				);
				foreach ( (array) $all_pages as $page ) {
					if ( $page->post_parent ) {
						static::$has_submenus = true;
						break;
					}
				}
			}
			// If this is a navigation submenu then we know we have submenus.
			if ( 'core/navigation-submenu' === $inner_block->name ) {
				static::$has_submenus = true;
				break;
			}
		}

return static::$has_submenus;
	}

/**
	 * Determine whether the navigation blocks is interactive.
	 *
	 * @since 6.5.0
	 *
	 * @param array         $attributes   The block attributes.
	 * @param WP_Block_List $inner_blocks The list of inner blocks.
	 * @return bool Returns whether or not to load the view script.
	 */
	private static function is_interactive( $attributes, $inner_blocks ) {
		$has_submenus        = static::has_submenus( $inner_blocks );
		$is_responsive_menu  = static::is_responsive( $attributes );
		$computed_visibility = block_core_navigation_get_submenu_visibility( $attributes );
		$open_on_click       = 'click' === $computed_visibility;
		$show_submenu_icon   = ! empty( $attributes['showSubmenuIcon'] );
		return ( $has_submenus && ( $open_on_click || $show_submenu_icon ) ) || $is_responsive_menu;
	}

/**
	 * Returns whether or not a block needs a list item wrapper.
	 *
	 * @since 6.5.0
	 *
	 * @param WP_Block $block The block.
	 * @return bool Returns whether or not a block needs a list item wrapper.
	 */
	private static function does_block_need_a_list_item_wrapper( $block ) {

/**
		 * Filter the list of blocks that need a list item wrapper.
		 *
		 * Affords the ability to customize which blocks need a list item wrapper when rendered
		 * within a core/navigation block.
		 * This is useful for blocks that are not list items but should be wrapped in a list
		 * item when used as a child of a navigation block.
		 *
		 * @since 6.5.0
		 *
		 * @param array $needs_list_item_wrapper The list of blocks that need a list item wrapper.
		 */
		$needs_list_item_wrapper = apply_filters( 'block_core_navigation_listable_blocks', static::$needs_list_item_wrapper );

return in_array( $block->name, $needs_list_item_wrapper, true );
	}

/**
	 * Returns the markup for a single inner block.
	 *
	 * @since 6.5.0
	 *
	 * @param WP_Block $inner_block The inner block.
	 * @return string Returns the markup for a single inner block.
	 */
	private static function get_markup_for_inner_block( $inner_block ) {
		$inner_block_content = $inner_block->render();
		if ( ! empty( $inner_block_content ) ) {
			if ( static::does_block_need_a_list_item_wrapper( $inner_block ) ) {
				return '<li class="wp-block-navigation-item">' . $inner_block_content . '</li>';
			}
		}

return $inner_block_content;
	}

/**
	 * Returns the html for blocks from a template part (without navigation container wrapper).
	 *
	 * @since 6.5.0
	 *
	 * @param WP_Block_List $blocks The list of blocks to render.
	 * @return string Returns the html for the template part blocks.
	 */
	private static function get_template_part_blocks_html( $blocks ) {
		$html = '';
		foreach ( $blocks as $block ) {
			$html .= $block->render();
		}
		return $html;
	}

/**
	 * Returns the html for the inner blocks of the navigation block.
	 *
	 * @since 6.5.0
	 *
	 * @param array         $attributes   The block attributes.
	 * @param WP_Block_List $inner_blocks The list of inner blocks.
	 * @return string Returns the html for the inner blocks of the navigation block.
	 */
	private static function get_inner_blocks_html( $attributes, $inner_blocks ) {
		$has_submenus   = static::has_submenus( $inner_blocks );
		$is_interactive = static::is_interactive( $attributes, $inner_blocks );

$style                = static::get_styles( $attributes );
		$class                = static::get_classes( $attributes );
		$container_attributes = get_block_wrapper_attributes(
			array(
				'class' => 'wp-block-navigation__container ' . $class,
				'style' => $style,
			)
		);

$inner_blocks_html = '';
		$is_list_open      = false;

foreach ( $inner_blocks as $inner_block ) {
			$inner_block_markup = static::get_markup_for_inner_block( $inner_block );
			$p                  = new WP_HTML_Tag_Processor( $inner_block_markup );
			$is_list_item       = $p->next_tag( 'LI' );

if ( $is_list_item && ! $is_list_open ) {
				$is_list_open       = true;
				$inner_blocks_html .= sprintf(
					'<ul %1$s>',
					$container_attributes
				);
			}

if ( ! $is_list_item && $is_list_open ) {
				$is_list_open       = false;
				$inner_blocks_html .= '</ul>';
			}

$inner_blocks_html .= $inner_block_markup;
		}

if ( $is_list_open ) {
			$inner_blocks_html .= '</ul>';
		}

// Add directives to the submenu if needed.
		if ( $has_submenus && $is_interactive ) {
			$tags              = new WP_HTML_Tag_Processor( $inner_blocks_html );
			$inner_blocks_html = block_core_navigation_add_directives_to_submenu( $tags, $attributes );
		}

return $inner_blocks_html;
	}

/**
	 * Gets the inner blocks for the navigation block from the navigation post.
	 *
	 * @since 6.5.0
	 *
	 * @param array $attributes The block attributes.
	 * @return WP_Block_List Returns the inner blocks for the navigation block.
	 */
	private static function get_inner_blocks_from_navigation_post( $attributes ) {
		$navigation_post = get_post( $attributes['ref'] );
		if ( ! isset( $navigation_post ) ) {
			return new WP_Block_List( array(), $attributes );
		}

// Only published posts are valid. If this is changed then a corresponding change
		// must also be implemented in `use-navigation-menu.js`.
		if ( 'publish' === $navigation_post->post_status ) {
			$parsed_blocks = parse_blocks( $navigation_post->post_content );

// 'parse_blocks' includes a null block with '\n\n' as the content when
			// it encounters whitespace. This code strips it.
			$blocks = block_core_navigation_filter_out_empty_blocks( $parsed_blocks );

// Re-serialize, and run Block Hooks algorithm to inject hooked blocks.
			// TODO: See if we can move the apply_block_hooks_to_content_from_post_object() call
			// before the parse_blocks() call further above, to avoid the extra serialization/parsing.
			$markup = serialize_blocks( $blocks );
			$markup = apply_block_hooks_to_content_from_post_object( $markup, $navigation_post );
			$blocks = parse_blocks( $markup );

// TODO - this uses the full navigation block attributes for the
			// context which could be refined.
			return new WP_Block_List( $blocks, $attributes );
		}
	}

/**
	 * Gets the inner blocks for the navigation block from the fallback.
	 *
	 * @since 6.5.0
	 *
	 * @param array $attributes The block attributes.
	 * @return WP_Block_List Returns the inner blocks for the navigation block.
	 */
	private static function get_inner_blocks_from_fallback( $attributes ) {
		$fallback_blocks = block_core_navigation_get_fallback_blocks();

// Fallback my have been filtered so do basic test for validity.
		if ( empty( $fallback_blocks ) || ! is_array( $fallback_blocks ) ) {
			return new WP_Block_List( array(), $attributes );
		}

return new WP_Block_List( $fallback_blocks, $attributes );
	}

/**
	 * Recursively disables overlay menu for navigation blocks within overlay blocks.
	 * Prevents nested overlays (inception).
	 *
	 * @since 6.5.0
	 *
	 * @param array $blocks Array of parsed block arrays.
	 * @return array Modified blocks with overlayMenu set to 'never' for navigation blocks.
	 */
	private static function disable_overlay_menu_for_nested_navigation_blocks( $blocks ) {
		if ( empty( $blocks ) || ! is_array( $blocks ) ) {
			return $blocks;
		}

foreach ( $blocks as &$block ) {
			if ( ! isset( $block['blockName'] ) ) {
				continue;
			}

// If this is a navigation block, disable its overlay menu.
			if ( 'core/navigation' === $block['blockName'] ) {
				if ( ! isset( $block['attrs'] ) ) {
					$block['attrs'] = array();
				}
				$block['attrs']['overlayMenu'] = 'never';
				// Mark this as a nested navigation within an overlay template part
				// so we can handle its rendering differently.
				$block['attrs']['_isWithinOverlayTemplatePart'] = true;
			}

// Recursively process inner blocks.
			if ( ! empty( $block['innerBlocks'] ) && is_array( $block['innerBlocks'] ) ) {
				$block['innerBlocks'] = static::disable_overlay_menu_for_nested_navigation_blocks( $block['innerBlocks'] );
			}
		}

return $blocks;
	}

/**
	 * Gets the inner blocks for the navigation block from an overlay template part.
	 *
	 * @since 6.5.0
	 *
	 * @param string $overlay_template_part_id The overlay template part ID in format "theme//slug".
	 * @param array  $attributes                The block attributes.
	 * @return WP_Block_List Returns the inner blocks for the overlay template part.
	 */
	private static function get_overlay_blocks_from_template_part( $overlay_template_part_id, $attributes ) {
		if ( empty( $overlay_template_part_id ) || ! is_string( $overlay_template_part_id ) ) {
			return new WP_Block_List( array(), $attributes );
		}

// Parse the template part ID (format: "theme//slug").
		// If it's just a slug, construct the full ID using the current theme.
		$parts = explode( '//', $overlay_template_part_id, 2 );
		if ( count( $parts ) === 2 ) {
			// Already in "theme//slug" format (backward compatibility).
			$theme = $parts[0];
			$slug  = $parts[1];
		} else {
			// Just a slug, use current theme.
			$theme = get_stylesheet();
			$slug  = $overlay_template_part_id;
		}

// Only query for template parts from the active theme.
		if ( get_stylesheet() !== $theme ) {
			return new WP_Block_List( array(), $attributes );
		}

// Query for the template part post.
		$template_part_query = new WP_Query(
			array(
				'post_type'           => 'wp_template_part',
				'post_status'         => 'publish',
				'post_name__in'       => array( $slug ),
				'tax_query'           => array(
					array(
						'taxonomy' => 'wp_theme',
						'field'    => 'name',
						'terms'    => $theme,
					),
				),
				'posts_per_page'      => 1,
				'no_found_rows'       => true,
				'lazy_load_term_meta' => false, // Do not lazy load term meta, as template parts only have one term.
			)
		);

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

if ( ! $template_part_post ) {
			// Try to get from theme file if not in database.
			// Construct the full template part ID for get_block_file_template.
			$full_template_part_id = $theme . '//' . $slug;
			$block_template        = get_block_file_template( $full_template_part_id, 'wp_template_part' );
			if ( isset( $block_template->content ) ) {
				// Expand shortcodes before parsing blocks, matching the order in
				// `render_block_core_template_part()`.
				$content       = shortcode_unautop( $block_template->content );
				$content       = do_shortcode( $content );
				$parsed_blocks = parse_blocks( $content );
				$blocks        = block_core_navigation_filter_out_empty_blocks( $parsed_blocks );
				// Disable overlay menu for any navigation blocks within the overlay to prevent nested overlays.
				$blocks = static::disable_overlay_menu_for_nested_navigation_blocks( $blocks );
				return new WP_Block_List( $blocks, $attributes );
			}
			return new WP_Block_List( array(), $attributes );
		}

// Get the template part content.
		$block_template = _build_block_template_result_from_post( $template_part_post );
		if ( ! isset( $block_template->content ) ) {
			return new WP_Block_List( array(), $attributes );
		}

$parsed_blocks = parse_blocks( $block_template->content );

// 'parse_blocks' includes a null block with '\n\n' as the content when
		// it encounters whitespace. This code strips it.
		$blocks = block_core_navigation_filter_out_empty_blocks( $parsed_blocks );

// Re-serialize, and run Block Hooks algorithm to inject hooked blocks.
		$markup = serialize_blocks( $blocks );
		$markup = apply_block_hooks_to_content_from_post_object( $markup, $template_part_post );

// Expand shortcodes before parsing blocks, matching the order in
		// `render_block_core_template_part()`.
		$markup = shortcode_unautop( $markup );
		$markup = do_shortcode( $markup );

$blocks = parse_blocks( $markup );

// Disable overlay menu for any navigation blocks within the overlay to prevent nested overlays.
		$blocks = static::disable_overlay_menu_for_nested_navigation_blocks( $blocks );

return new WP_Block_List( $blocks, $attributes );
	}

/**
	 * Gets the inner blocks for the navigation block.
	 *
	 * @since 6.5.0
	 *
	 * @param array    $attributes The block attributes.
	 * @param WP_Block $block The parsed block.
	 * @return WP_Block_List Returns the inner blocks for the navigation block.
	 */
	private static function get_inner_blocks( $attributes, $block ) {
		$inner_blocks = $block->inner_blocks;

// Ensure that blocks saved with the legacy ref attribute name (navigationMenuId) continue to render.
		if ( array_key_exists( 'navigationMenuId', $attributes ) ) {
			$attributes['ref'] = $attributes['navigationMenuId'];
		}

// If:
		// - the gutenberg plugin is active
		// - `__unstableLocation` is defined
		// - we have menu items at the defined location
		// - we don't have a relationship to a `wp_navigation` Post (via `ref`).
		// ...then create inner blocks from the classic menu assigned to that location.
		if (
			defined( 'IS_GUTENBERG_PLUGIN' ) && IS_GUTENBERG_PLUGIN &&
			array_key_exists( '__unstableLocation', $attributes ) &&
			! array_key_exists( 'ref', $attributes ) &&
			! empty( block_core_navigation_get_menu_items_at_location( $attributes['__unstableLocation'] ) )
		) {
			$inner_blocks = block_core_navigation_get_inner_blocks_from_unstable_location( $attributes );
		}

// Load inner blocks from the navigation post.
		if ( array_key_exists( 'ref', $attributes ) ) {
			$inner_blocks = static::get_inner_blocks_from_navigation_post( $attributes );
		}

// If there are no inner blocks then fallback to rendering an appropriate fallback.
		if ( empty( $inner_blocks ) ) {
			$inner_blocks = static::get_inner_blocks_from_fallback( $attributes );
		}

/**
		 * Filter navigation block $inner_blocks.
		 * Allows modification of a navigation block menu items.
		 *
		 * @since 6.1.0
		 *
		 * @param \WP_Block_List $inner_blocks
		 */
		$inner_blocks = apply_filters( 'block_core_navigation_render_inner_blocks', $inner_blocks );

$post_ids = block_core_navigation_get_post_ids( $inner_blocks );
		if ( $post_ids ) {
			_prime_post_caches( $post_ids, false, false );
		}

return $inner_blocks;
	}

/**
	 * Gets the name of the current navigation, if it has one.
	 *
	 * @since 6.5.0
	 *
	 * @param array $attributes The block attributes.
	 * @return string Returns the name of the navigation.
	 */
	private static function get_navigation_name( $attributes ) {

$navigation_name = $attributes['ariaLabel'] ?? '';

if ( ! empty( $navigation_name ) ) {
			return $navigation_name;
		}

// Load the navigation post.
		if ( array_key_exists( 'ref', $attributes ) ) {
			$navigation_post = get_post( $attributes['ref'] );
			if ( ! isset( $navigation_post ) ) {
				return $navigation_name;
			}

// Only published posts are valid. If this is changed then a corresponding change
			// must also be implemented in `use-navigation-menu.js`.
			if ( 'publish' === $navigation_post->post_status ) {
				return $navigation_post->post_title;
			}
		}

return $navigation_name;
	}

/**
	 * Returns the layout class for the navigation block.
	 *
	 * @since 6.5.0
	 *
	 * @param array $attributes The block attributes.
	 * @return string Returns the layout class for the navigation block.
	 */
	private static function get_layout_class( $attributes ) {
		$layout_justification = array(
			'left'          => 'items-justified-left',
			'right'         => 'items-justified-right',
			'center'        => 'items-justified-center',
			'space-between' => 'items-justified-space-between',
		);

$layout_class = '';
		if (
			isset( $attributes['layout']['justifyContent'] ) &&
			isset( $layout_justification[ $attributes['layout']['justifyContent'] ] )
		) {
			$layout_class .= $layout_justification[ $attributes['layout']['justifyContent'] ];
		}
		if ( isset( $attributes['layout']['orientation'] ) && 'vertical' === $attributes['layout']['orientation'] ) {
			$layout_class .= ' is-vertical';
		}

if ( isset( $attributes['layout']['flexWrap'] ) && 'nowrap' === $attributes['layout']['flexWrap'] ) {
			$layout_class .= ' no-wrap';
		}
		return $layout_class;
	}

/**
	 * Return classes for the navigation block.
	 *
	 * @since 6.5.0
	 *
	 * @param array $attributes The block attributes.
	 * @return string Returns the classes for the navigation block.
	 */
	private static function get_classes( $attributes ) {
		// Restore legacy classnames for submenu positioning.
		$layout_class       = static::get_layout_class( $attributes );
		$colors             = block_core_navigation_build_css_colors( $attributes );
		$font_sizes         = block_core_navigation_build_css_font_sizes( $attributes );
		$is_responsive_menu = static::is_responsive( $attributes );

// Manually add block support text decoration as CSS class.
		$text_decoration       = $attributes['style']['typography']['textDecoration'] ?? null;
		$text_decoration_class = sprintf( 'has-text-decoration-%s', $text_decoration );

$classes = array_merge(
			$colors['css_classes'],
			$font_sizes['css_classes'],
			$is_responsive_menu ? array( 'is-responsive' ) : array(),
			$layout_class ? array( $layout_class ) : array(),
			$text_decoration ? array( $text_decoration_class ) : array()
		);
		return implode( ' ', $classes );
	}

/**
	 * Get styles for the navigation block.
	 *
	 * @since 6.5.0
	 *
	 * @param array $attributes The block attributes.
	 * @return string Returns the styles for the navigation block.
	 */
	private static function get_styles( $attributes ) {
		$colors       = block_core_navigation_build_css_colors( $attributes );
		$font_sizes   = block_core_navigation_build_css_font_sizes( $attributes );
		$block_styles = $attributes['styles'] ?? '';
		return $block_styles . $colors['inline_styles'] . $font_sizes['inline_styles'];
	}

/**
	 * Get responsive container classes for the navigation block.
	 *
	 * @since 7.0.0
	 *
	 * @param bool  $is_hidden_by_default Whether the responsive menu is hidden by default.
	 * @param bool  $has_custom_overlay Whether a custom overlay is used.
	 * @param array $colors The colors array.
	 * @return array Returns the responsive container classes.
	 */
	private static function get_responsive_container_classes( $is_hidden_by_default, $has_custom_overlay, $colors ) {
		$responsive_container_classes = array( 'wp-block-navigation__responsive-container' );

if ( $is_hidden_by_default ) {
			$responsive_container_classes[] = 'hidden-by-default';
		}

if ( $has_custom_overlay ) {
			$responsive_container_classes[] = 'disable-default-overlay';
		} else {
			// Don't apply overlay color classes if using a custom overlay template part.
			// The custom overlay is responsible for its own styling.
			$responsive_container_classes[] = implode( ' ', $colors['overlay_css_classes'] );
		}

return $responsive_container_classes;
	}

/**
	 * Get overlay inline styles for the navigation block.
	 *
	 * @since 7.0.0
	 *
	 * @param array $colors The colors array.
	 * @return string Returns the overlay inline styles.
	 */
	private static function get_overlay_inline_styles( $has_custom_overlay, $colors ) {
		$overlay_inline_styles = $has_custom_overlay ? '' : esc_attr( safecss_filter_attr( $colors['overlay_inline_styles'] ) );
		return ( ! empty( $overlay_inline_styles ) ) ? "style=\"$overlay_inline_styles\"" : '';
	}

/**
	 * Get the responsive container markup
	 *
	 * @since 6.5.0
	 *
	 * @param array         $attributes The block attributes.
	 * @param WP_Block_List $inner_blocks The list of inner blocks.
	 * @param string        $inner_blocks_html The markup for the inner blocks.
	 * @return string Returns the container markup.
	 */
	private static function get_responsive_container_markup( $attributes, $inner_blocks, $inner_blocks_html ) {
		$is_interactive  = static::is_interactive( $attributes, $inner_blocks );
		$colors          = block_core_navigation_build_css_colors( $attributes );
		$modal_unique_id = wp_unique_id( 'modal-' );

$is_hidden_by_default = isset( $attributes['overlayMenu'] ) && 'always' === $attributes['overlayMenu'];

// Set-up variables for custom overlays.
		$has_custom_overlay             = false;
		$close_button_markup            = '';
		$has_custom_overlay_close_block = false;
		$overlay_blocks_html            = '';
		$custom_overlay_markup          = '';

// Check if an overlay template part is selected and render it.
		// This needs to happen before building classes so we know if overlay blocks actually exist.
		if ( ! empty( $attributes['overlay'] ) ) {
			// Get blocks from the overlay template part.
			$overlay_blocks = static::get_overlay_blocks_from_template_part( $attributes['overlay'], $attributes );
			// Render template part blocks directly without navigation container wrapper.
			$overlay_blocks_html = static::get_template_part_blocks_html( $overlay_blocks );
			// Check if overlay contains a navigation-overlay-close block (detect in rendered HTML so it works with patterns).
			$has_custom_overlay_close_block = block_core_navigation_overlay_html_has_close_block( $overlay_blocks_html );
			// Add Interactivity API directives to the overlay close block if present.
			if ( $has_custom_overlay_close_block && $is_interactive ) {
				$tags                = new WP_HTML_Tag_Processor( $overlay_blocks_html );
				$overlay_blocks_html = block_core_navigation_add_directives_to_overlay_close( $tags );
			}
			// Images in the overlay are hidden until the menu is opened. Pre-set
			// fetchpriority="low" so that when wp_filter_content_tags() processes the
			// parent template part, it sees the attribute already present and calls
			// wp_get_loading_optimization_attributes() with fetchpriority="low", which both prevents
			// fetchpriority="high" from being added and stops the LCP counter from being incremented.
			$overlay_blocks_html = block_core_navigation_set_overlay_image_fetch_priority( $overlay_blocks_html );
		}

$has_custom_overlay = ! empty( $overlay_blocks_html );

$responsive_container_classes = static::get_responsive_container_classes( $is_hidden_by_default, $has_custom_overlay, $colors );

$open_button_classes = array(
			'wp-block-navigation__responsive-container-open',
			$is_hidden_by_default ? 'always-shown' : '',
		);

$should_display_icon_label = isset( $attributes['hasIcon'] ) && true === $attributes['hasIcon'];
		$toggle_button_icon        = '<svg width="24" height="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" aria-hidden="true" focusable="false"><path d="M4 7.5h16v1.5H4z"></path><path d="M4 15h16v1.5H4z"></path></svg>';
		if ( isset( $attributes['icon'] ) ) {
			if ( 'menu' === $attributes['icon'] ) {
				$toggle_button_icon = '<svg width="24" height="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M5 5v1.5h14V5H5z"></path><path d="M5 12.8h14v-1.5H5v1.5z"></path><path d="M5 19h14v-1.5H5V19z"></path></svg>';
			}
		}
		$toggle_button_content       = $should_display_icon_label ? $toggle_button_icon : __( 'Menu' );
		$toggle_close_button_icon    = '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" focusable="false"><path d="m13.06 12 6.47-6.47-1.06-1.06L12 10.94 5.53 4.47 4.47 5.53 10.94 12l-6.47 6.47 1.06 1.06L12 13.06l6.47 6.47 1.06-1.06L13.06 12Z"></path></svg>';
		$toggle_close_button_content = $should_display_icon_label ? $toggle_close_button_icon : __( 'Close' );
		$toggle_aria_label_open      = $should_display_icon_label ? 'aria-label="' . __( 'Open menu' ) . '"' : ''; // Open button label.
		$toggle_aria_label_close     = $should_display_icon_label ? 'aria-label="' . __( 'Close menu' ) . '"' : ''; // Close button label.

// Add Interactivity API directives to the markup if needed.
		$open_button_directives          = '';
		$responsive_container_directives = '';
		$responsive_dialog_directives    = '';
		$close_button_directives         = '';
		if ( $is_interactive ) {
			$open_button_directives                  = '
				data-wp-on--click="actions.openMenuOnClick"
				data-wp-on--keydown="actions.handleMenuKeydown"
			';
			$responsive_container_directives         = '
				data-wp-class--has-modal-open="state.isMenuOpen"
				data-wp-class--is-menu-open="state.isMenuOpen"
				data-wp-watch="callbacks.initMenu"
				data-wp-on--keydown="actions.handleMenuKeydown"
				data-wp-on--focusout="actions.handleMenuFocusout"
				tabindex="-1"
			';
			$responsive_dialog_directives            = '
				data-wp-bind--aria-modal="state.ariaModal"
				data-wp-bind--aria-label="state.ariaLabel"
				data-wp-bind--role="state.roleAttribute"
			';
			$close_button_directives                 = '
				data-wp-on--click="actions.closeMenuOnClick"
			';
			$responsive_container_content_directives = '
				data-wp-watch="callbacks.focusFirstElement"
			';
		}

// Don't apply overlay inline styles if using a custom overlay template part.
		// The custom overlay is responsible for its own styling.
		$overlay_inline_styles = static::get_overlay_inline_styles( $has_custom_overlay, $colors );

if ( $has_custom_overlay ) {
			$custom_overlay_markup = sprintf(
				'<div class="wp-block-navigation__overlay-container">%s</div>',
				$overlay_blocks_html
			);
		}

// Show default close button for all responsive navigation,
		// unless custom overlay has its own close block.
		if ( ! $has_custom_overlay_close_block ) {
			$close_button_markup = sprintf(
				'<button %1$s class="wp-block-navigation__responsive-container-close" %2$s>%3$s</button>',
				$toggle_aria_label_close,
				$close_button_directives,
				$toggle_close_button_content
			);
		}

return sprintf(
			'<button aria-haspopup="dialog" %3$s class="%6$s" %10$s>%8$s</button>
				<div class="%5$s" %7$s id="%1$s" %11$s>
					<div class="wp-block-navigation__responsive-close" tabindex="-1">
						<div class="wp-block-navigation__responsive-dialog" %12$s>
							%13$s
							<div class="wp-block-navigation__responsive-container-content" %14$s id="%1$s-content">
								%2$s
								%15$s
							</div>
						</div>
					</div>
				</div>',
			esc_attr( $modal_unique_id ),
			$inner_blocks_html,
			$toggle_aria_label_open,
			$toggle_aria_label_close,
			esc_attr( trim( implode( ' ', $responsive_container_classes ) ) ),
			esc_attr( trim( implode( ' ', $open_button_classes ) ) ),
			$overlay_inline_styles,
			$toggle_button_content,
			$toggle_close_button_content,
			$open_button_directives,
			$responsive_container_directives,
			$responsive_dialog_directives,
			$close_button_markup,
			$responsive_container_content_directives,
			$has_custom_overlay ? $custom_overlay_markup : ''
		);
	}

/**
	 * Get the wrapper attributes
	 *
	 * @since 6.5.0
	 *
	 * @param array         $attributes    The block attributes.
	 * @param WP_Block_List $inner_blocks  A list of inner blocks.
	 * @return string Returns the navigation block markup.
	 */
	private static function get_nav_attributes( $attributes, $inner_blocks ) {
		$is_interactive     = static::is_interactive( $attributes, $inner_blocks );
		$is_responsive_menu = static::is_responsive( $attributes );
		$style              = static::get_styles( $attributes );
		$class              = static::get_classes( $attributes );
		$extra_attributes   = array(
			'class' => $class,
			'style' => $style,
		);
		// Only add aria-label for top-level navigation blocks.
		// Skip navigation blocks marked as being within overlay template parts.
		$is_within_overlay = $attributes['_isWithinOverlayTemplatePart'] ?? false;
		if ( $is_within_overlay ) {
			$nav_menu_name = static::get_navigation_name( $attributes );
		} else {
			$nav_menu_name = static::get_unique_navigation_name( $attributes );
		}

if ( ! empty( $nav_menu_name ) ) {
			$extra_attributes['aria-label'] = $nav_menu_name;
		}
		$wrapper_attributes = get_block_wrapper_attributes( $extra_attributes );

if ( $is_responsive_menu ) {
			$nav_element_directives = static::get_nav_element_directives( $is_interactive );
			$wrapper_attributes    .= ' ' . $nav_element_directives;
		}

return $wrapper_attributes;
	}

/**
	 * Gets the nav element directives.
	 *
	 * @since 6.5.0
	 *
	 * @param bool $is_interactive Whether the block is interactive.
	 * @return string the directives for the navigation element.
	 */
	private static function get_nav_element_directives( $is_interactive ) {
		if ( ! $is_interactive ) {
			return '';
		}
		// When adding to this array be mindful of security concerns.
		$nav_element_context    = wp_interactivity_data_wp_context(
			array(
				'overlayOpenedBy' => array(
					'click' => false,
					'hover' => false,
					'focus' => false,
				),
				'type'            => 'overlay',
				'roleAttribute'   => '',
				'ariaLabel'       => __( 'Menu' ),
			)
		);
		$nav_element_directives = '
		 data-wp-interactive="core/navigation" '
		. $nav_element_context;

return $nav_element_directives;
	}

/**
	 * Handle view script module loading.
	 *
	 * @since 6.5.0
	 *
	 * @param array         $attributes   The block attributes.
	 * @param WP_Block      $block        The parsed block.
	 * @param WP_Block_List $inner_blocks The list of inner blocks.
	 */
	private static function handle_view_script_module_loading( $attributes, $block, $inner_blocks ) {
		if ( static::is_interactive( $attributes, $inner_blocks ) ) {
			wp_enqueue_script_module( '@wordpress/block-library/navigation/view' );
		}
	}

/**
	 * Returns the markup for the navigation block.
	 *
	 * @since 6.5.0
	 *
	 * @param array         $attributes The block attributes.
	 * @param WP_Block_List $inner_blocks The list of inner blocks.
	 * @return string Returns the navigation wrapper markup.
	 */
	private static function get_inner_block_markup( $attributes, $inner_blocks ) {
		$inner_blocks_html = static::get_inner_blocks_html( $attributes, $inner_blocks );
		if ( static::is_responsive( $attributes ) ) {
			return static::get_responsive_container_markup( $attributes, $inner_blocks, $inner_blocks_html );
		}
		return $inner_blocks_html;
	}

/**
	 * Returns a unique name for the navigation.
	 *
	 * @since 6.5.0
	 *
	 * @param array $attributes The block attributes.
	 * @return string Returns a unique name for the navigation.
	 */
	private static function get_unique_navigation_name( $attributes ) {
		$nav_menu_name = static::get_navigation_name( $attributes );

// This is used to count the number of times a navigation name has been seen,
		// so that we can ensure every navigation has a unique id.
		if ( isset( static::$seen_menu_names[ $nav_menu_name ] ) ) {
			++static::$seen_menu_names[ $nav_menu_name ];
		} else {
			static::$seen_menu_names[ $nav_menu_name ] = 1;
		}

// If the menu name has been used previously then append an ID
		// to the name to ensure uniqueness across a given post.
		if ( isset( static::$seen_menu_names[ $nav_menu_name ] ) && static::$seen_menu_names[ $nav_menu_name ] > 1 ) {
			$count         = static::$seen_menu_names[ $nav_menu_name ];
			$nav_menu_name = $nav_menu_name . ' ' . ( $count );
		}

return $nav_menu_name;
	}

/**
	 * Renders the navigation block.
	 *
	 * @since 6.5.0
	 *
	 * @param array    $attributes The block attributes.
	 * @param string   $content    The saved content.
	 * @param WP_Block $block      The parsed block.
	 * @return string Returns the navigation block markup.
	 */
	public static function render( $attributes, $content, $block ) {
		/**
		 * Deprecated:
		 * The rgbTextColor and rgbBackgroundColor attributes
		 * have been deprecated in favor of
		 * customTextColor and customBackgroundColor ones.
		 * Move the values from old attrs to the new ones.
		 */
		if ( isset( $attributes['rgbTextColor'] ) && empty( $attributes['textColor'] ) ) {
			$attributes['customTextColor'] = $attributes['rgbTextColor'];
		}

if ( isset( $attributes['rgbBackgroundColor'] ) && empty( $attributes['backgroundColor'] ) ) {
			$attributes['customBackgroundColor'] = $attributes['rgbBackgroundColor'];
		}

unset( $attributes['rgbTextColor'], $attributes['rgbBackgroundColor'] );

$inner_blocks = static::get_inner_blocks( $attributes, $block );
		// Prevent navigation blocks referencing themselves from rendering.
		if ( block_core_navigation_block_tree_has_block_type(
			$inner_blocks,
			'core/navigation'
		) ) {
			return '';
		}

static::handle_view_script_module_loading( $attributes, $block, $inner_blocks );

// Use div wrapper if this navigation block is within an overlay template part.
		$is_within_overlay = $attributes['_isWithinOverlayTemplatePart'] ?? false;
		$tag_name          = $is_within_overlay ? 'div' : 'nav';

return sprintf(
			'<%1$s %2$s>%3$s</%1$s>',
			$tag_name,
			static::get_nav_attributes( $attributes, $inner_blocks ),
			static::get_inner_block_markup( $attributes, $inner_blocks )
		);
	}
}

// These functions are used for the __unstableLocation feature and only active
// when the gutenberg plugin is active.
if ( defined( 'IS_GUTENBERG_PLUGIN' ) && IS_GUTENBERG_PLUGIN ) {
	/**
	 * Returns the menu items for a WordPress menu location.
	 *
	 * @since 5.9.0
	 *
	 * @param string $location The menu location.
	 * @return array Menu items for the location.
	 */
	function block_core_navigation_get_menu_items_at_location( $location ) {
		if ( empty( $location ) ) {
			return;
		}

// Build menu data. The following approximates the code in
		// `wp_nav_menu()` and `gutenberg_output_block_nav_menu`.

// Find the location in the list of locations, returning early if the
		// location can't be found.
		$locations = get_nav_menu_locations();
		if ( ! isset( $locations[ $location ] ) ) {
			return;
		}

// Get the menu from the location, returning early if there is no
		// menu or there was an error.
		$menu = wp_get_nav_menu_object( $locations[ $location ] );
		if ( ! $menu || is_wp_error( $menu ) ) {
			return;
		}

$menu_items = wp_get_nav_menu_items( $menu->term_id, array( 'update_post_term_cache' => false ) );
		_wp_menu_item_classes_by_context( $menu_items );

return $menu_items;
	}

/**
	 * Sorts a standard array of menu items into a nested structure keyed by the
	 * id of the parent menu.
	 *
	 * @since 5.9.0
	 *
	 * @param array $menu_items Menu items to sort.
	 * @return array An array keyed by the id of the parent menu where each element
	 *               is an array of menu items that belong to that parent.
	 */
	function block_core_navigation_sort_menu_items_by_parent_id( $menu_items ) {
		$sorted_menu_items = array();
		foreach ( (array) $menu_items as $menu_item ) {
			$sorted_menu_items[ $menu_item->menu_order ] = $menu_item;
		}
		unset( $menu_items, $menu_item );

$menu_items_by_parent_id = array();
		foreach ( $sorted_menu_items as $menu_item ) {
			$menu_items_by_parent_id[ $menu_item->menu_item_parent ][] = $menu_item;
		}

return $menu_items_by_parent_id;
	}

/**
	 * Gets the inner blocks for the navigation block from the unstable location attribute.
	 *
	 * @since 6.5.0
	 *
	 * @param array $attributes The block attributes.
	 * @return WP_Block_List Returns the inner blocks for the navigation block.
	 */
	function block_core_navigation_get_inner_blocks_from_unstable_location( $attributes ) {
		$menu_items = block_core_navigation_get_menu_items_at_location( $attributes['__unstableLocation'] );
		if ( empty( $menu_items ) ) {
			return new WP_Block_List( array(), $attributes );
		}

$menu_items_by_parent_id = block_core_navigation_sort_menu_items_by_parent_id( $menu_items );
		$parsed_blocks           = block_core_navigation_parse_blocks_from_menu_items( $menu_items_by_parent_id[0], $menu_items_by_parent_id );
		return new WP_Block_List( $parsed_blocks, $attributes );
	}
}

/**
 * Checks if the overlay HTML contains a navigation-overlay-close block.
 *
 * Uses WP_HTML_Tag_Processor to detect the close button in rendered output,
 * so it works when the overlay uses patterns (pattern content is rendered at
 * output time, not in the block tree).
 *
 * @since 7.0.0
 *
 * @param string $html The rendered overlay HTML.
 * @return bool True if a close button element is found.
 */
function block_core_navigation_overlay_html_has_close_block( $html ) {
	$tags = new WP_HTML_Tag_Processor( $html );
	return $tags->next_tag(
		array(
			'tag_name'   => 'BUTTON',
			'class_name' => 'wp-block-navigation-overlay-close',
		)
	);
}

/**
 * Add Interactivity API directives to the navigation-overlay-close block
 * markup using the Tag Processor.
 *
 * @since 6.5.0
 *
 * @param WP_HTML_Tag_Processor $tags Markup of the navigation block.
 * @return string Overlay close markup with the directives injected.
 */
function block_core_navigation_add_directives_to_overlay_close( $tags ) {
	// Find all navigation-overlay-close buttons.
	while ( $tags->next_tag(
		array(
			'tag_name'   => 'BUTTON',
			'class_name' => 'wp-block-navigation-overlay-close',
		)
	) ) {
		// Add the same close directive as the default close button.
		$tags->set_attribute( 'data-wp-on--click', 'actions.closeMenuOnClick' );
	}
	return $tags->get_updated_html();
}

/**
 * Sets fetchpriority="low" on all IMG tags within the navigation overlay.
 *
 * Images in the overlay are hidden until the menu is opened, so they should
 * not compete with any actual LCP element image on the page.
 *
 * @since 7.0.0
 *
 * @param string $overlay_blocks_html The rendered HTML of the overlay blocks.
 * @return string Modified HTML with fetchpriority="low" on all IMG tags.
 */
function block_core_navigation_set_overlay_image_fetch_priority( string $overlay_blocks_html ): string {
	$tags = new WP_HTML_Tag_Processor( $overlay_blocks_html );
	while ( $tags->next_tag( 'IMG' ) ) {
		$tags->set_attribute( 'fetchpriority', 'low' );
	}
	return $tags->get_updated_html();
}

/**
 * Add Interactivity API directives to the navigation-submenu and page-list
 * blocks markup using the Tag Processor.
 *
 * @since 6.3.0
 *
 * @param WP_HTML_Tag_Processor $tags             Markup of the navigation block.
 * @param array                 $block_attributes Block attributes.
 *
 * @return string Submenu markup with the directives injected.
 */
function block_core_navigation_add_directives_to_submenu( $tags, $block_attributes ) {
	while ( $tags->next_tag(
		array(
			'tag_name'   => 'LI',
			'class_name' => 'has-child',
		)
	) ) {
		// Add directives to the parent `<li>`.
		$tags->set_attribute( 'data-wp-interactive', 'core/navigation' );
		$tags->set_attribute( 'data-wp-context', '{ "submenuOpenedBy": { "click": false, "hover": false, "focus": false }, "type": "submenu", "modal": null, "previousFocus": null }' );
		$tags->set_attribute( 'data-wp-watch', 'callbacks.initMenu' );
		$tags->set_attribute( 'data-wp-on--focusout', 'actions.handleMenuFocusout' );
		$tags->set_attribute( 'data-wp-on--keydown', 'actions.handleMenuKeydown' );

// This is a fix for Safari. Without it, Safari doesn't change the active
		// element when the user clicks on a button. It can be removed once we add
		// an overlay to capture the clicks, instead of relying on the focusout
		// event.
		$tags->set_attribute( 'tabindex', '-1' );

$computed_visibility = block_core_navigation_get_submenu_visibility( $block_attributes );
		$open_on_hover       = 'hover' === $computed_visibility;

if ( $open_on_hover ) {
			$tags->set_attribute( 'data-wp-on--pointerenter', 'actions.openMenuOnHover' );
			$tags->set_attribute( 'data-wp-on--pointerleave', 'actions.closeMenuOnHover' );
		}

// Add directives to the toggle submenu button.
		if ( $tags->next_tag(
			array(
				'tag_name'   => 'BUTTON',
				'class_name' => 'wp-block-navigation-submenu__toggle',
			)
		) ) {
			$tags->set_attribute( 'data-wp-on--click', 'actions.toggleMenuOnClick' );
			$tags->set_attribute( 'data-wp-bind--aria-expanded', 'state.isSubmenuOpen' );
			// The `aria-expanded` attribute for SSR is already added in the submenu block.
		}
		// Add directives to the submenu.
		if ( $tags->next_tag(
			array(
				'tag_name'   => 'UL',
				'class_name' => 'wp-block-navigation__submenu-container',
			)
		) ) {
			$tags->set_attribute( 'data-wp-on--focus', 'actions.openMenuOnFocus' );
		}

// Iterate through subitems if exist.
		block_core_navigation_add_directives_to_submenu( $tags, $block_attributes );
	}
	return $tags->get_updated_html();
}

/**
 * Build an array with CSS classes and inline styles defining the colors
 * which will be applied to the navigation markup in the front-end.
 *
 * @since 5.9.0
 *
 * @param array $attributes Navigation block attributes.
 *
 * @return array Colors CSS classes and inline styles.
 */
function block_core_navigation_build_css_colors( $attributes ) {
	$colors = array(
		'css_classes'           => array(),
		'inline_styles'         => '',
		'overlay_css_classes'   => array(),
		'overlay_inline_styles' => '',
	);

// Text color.
	$has_named_text_color  = array_key_exists( 'textColor', $attributes );
	$has_custom_text_color = array_key_exists( 'customTextColor', $attributes );

// If has text color.
	if ( $has_custom_text_color || $has_named_text_color ) {
		// Add has-text-color class.
		$colors['css_classes'][] = 'has-text-color';
	}

if ( $has_named_text_color ) {
		// Add the color class.
		$colors['css_classes'][] = sprintf( 'has-%s-color', $attributes['textColor'] );
	} elseif ( $has_custom_text_color ) {
		// Add the custom color inline style.
		$colors['inline_styles'] .= sprintf( 'color: %s;', $attributes['customTextColor'] );
	}

// Background color.
	$has_named_background_color  = array_key_exists( 'backgroundColor', $attributes );
	$has_custom_background_color = array_key_exists( 'customBackgroundColor', $attributes );

// If has background color.
	if ( $has_custom_background_color || $has_named_background_color ) {
		// Add has-background class.
		$colors['css_classes'][] = 'has-background';
	}

if ( $has_named_background_color ) {
		// Add the background-color class.
		$colors['css_classes'][] = sprintf( 'has-%s-background-color', $attributes['backgroundColor'] );
	} elseif ( $has_custom_background_color ) {
		// Add the custom background-color inline style.
		$colors['inline_styles'] .= sprintf( 'background-color: %s;', $attributes['customBackgroundColor'] );
	}

// Overlay text color.
	$has_named_overlay_text_color  = array_key_exists( 'overlayTextColor', $attributes );
	$has_custom_overlay_text_color = array_key_exists( 'customOverlayTextColor', $attributes );

// If has overlay text color.
	if ( $has_custom_overlay_text_color || $has_named_overlay_text_color ) {
		// Add has-text-color class.
		$colors['overlay_css_classes'][] = 'has-text-color';
	}

if ( $has_named_overlay_text_color ) {
		// Add the overlay color class.
		$colors['overlay_css_classes'][] = sprintf( 'has-%s-color', $attributes['overlayTextColor'] );
	} elseif ( $has_custom_overlay_text_color ) {
		// Add the custom overlay color inline style.
		$colors['overlay_inline_styles'] .= sprintf( 'color: %s;', $attributes['customOverlayTextColor'] );
	}

// Overlay background color.
	$has_named_overlay_background_color  = array_key_exists( 'overlayBackgroundColor', $attributes );
	$has_custom_overlay_background_color = array_key_exists( 'customOverlayBackgroundColor', $attributes );

// If has overlay background color.
	if ( $has_custom_overlay_background_color || $has_named_overlay_background_color ) {
		// Add has-background class.
		$colors['overlay_css_classes'][] = 'has-background';
	}

if ( $has_named_overlay_background_color ) {
		// Add the overlay background-color class.
		$colors['overlay_css_classes'][] = sprintf( 'has-%s-background-color', $attributes['overlayBackgroundColor'] );
	} elseif ( $has_custom_overlay_background_color ) {
		// Add the custom overlay background-color inline style.
		$colors['overlay_inline_styles'] .= sprintf( 'background-color: %s;', $attributes['customOverlayBackgroundColor'] );
	}

return $colors;
}

/**
 * Build an array with CSS classes and inline styles defining the font sizes
 * which will be applied to the navigation markup in the front-end.
 *
 * @since 5.9.0
 *
 * @param array $attributes Navigation block attributes.
 *
 * @return array Font size CSS classes and inline styles.
 */
function block_core_navigation_build_css_font_sizes( $attributes ) {
	// CSS classes.
	$font_sizes = array(
		'css_classes'   => array(),
		'inline_styles' => '',
	);

$has_named_font_size  = array_key_exists( 'fontSize', $attributes );
	$has_custom_font_size = array_key_exists( 'customFontSize', $attributes );

if ( $has_named_font_size ) {
		// Add the font size class.
		$font_sizes['css_classes'][] = sprintf( 'has-%s-font-size', $attributes['fontSize'] );
	} elseif ( $has_custom_font_size ) {
		// Add the custom font size inline style.
		$font_sizes['inline_styles'] = sprintf( 'font-size: %spx;', $attributes['customFontSize'] );
	}

return $font_sizes;
}

/**
 * Filter out empty "null" blocks from the block list.
 * 'parse_blocks' includes a null block with '\n\n' as the content when
 * it encounters whitespace. This is not a bug but rather how the parser
 * is designed.
 *
 * @since 5.9.0
 *
 * @param array $parsed_blocks the parsed blocks to be normalized.
 * @return array the normalized parsed blocks.
 */
function block_core_navigation_filter_out_empty_blocks( $parsed_blocks ) {
	$filtered = array_filter(
		$parsed_blocks,
		static function ( $block ) {
			return isset( $block['blockName'] );
		}
	);

// Reset keys.
	return array_values( $filtered );
}

/**
 * Recursively checks if blocks contain a specific block type.
 *
 * @since 7.0.0
 *
 * @param WP_Block_List $blocks           The list of blocks to check.
 * @param string        $block_type       The block type to search for (e.g., 'core/navigation').
 * @param array         $skip_block_types Optional. Block types to skip when recursing. Default empty array.
 * @return bool Returns true if the specified block type is found.
 */
function block_core_navigation_block_tree_has_block_type( $blocks, $block_type, $skip_block_types = array() ) {
	if ( empty( $blocks ) ) {
		return false;
	}

foreach ( $blocks as $block ) {
		if ( $block_type === $block->name ) {
			return true;
		}

// Recursively check inner blocks, skipping specified block types.
		if ( ! in_array( $block->name, $skip_block_types, true ) && ! empty( $block->inner_blocks ) ) {
			if ( block_core_navigation_block_tree_has_block_type( $block->inner_blocks, $block_type, $skip_block_types ) ) {
				return true;
			}
		}
	}

return false;
}

/**
 * Returns true if the navigation block contains a nested navigation block.
 *
 * @since 6.2.0
 * @deprecated 7.0.0 Use block_core_navigation_block_tree_has_block_type() instead.
 *
 * @param WP_Block_List $inner_blocks Inner block instance to be normalized.
 * @return bool true if the navigation block contains a nested navigation block.
 */
function block_core_navigation_block_contains_core_navigation( $inner_blocks ) {
	_deprecated_function( __FUNCTION__, '7.0.0', 'block_core_navigation_block_tree_has_block_type()' );

return block_core_navigation_block_tree_has_block_type(
		$inner_blocks,
		'core/navigation'
	);
}

/**
 * Retrieves the appropriate fallback to be used on the front of the
 * site when there is no menu assigned to the Nav block.
 *
 * This aims to mirror how the fallback mechanic for wp_nav_menu works.
 * See https://developer.wordpress.org/reference/functions/wp_nav_menu/#more-information.
 *
 * @since 5.9.0
 *
 * @return array the array of blocks to be used as a fallback.
 */
function block_core_navigation_get_fallback_blocks() {
	$page_list_fallback = array(
		array(
			'blockName'    => 'core/page-list',
			'innerContent' => array(),
			'attrs'        => array(),
		),
	);

$registry = WP_Block_Type_Registry::get_instance();

// If `core/page-list` is not registered then return empty blocks.
	$fallback_blocks = $registry->is_registered( 'core/page-list' ) ? $page_list_fallback : array();
	$navigation_post = WP_Navigation_Fallback::get_fallback();

// Use the first non-empty Navigation as fallback if available.
	if ( $navigation_post ) {
		$parsed_blocks  = parse_blocks( $navigation_post->post_content );
		$maybe_fallback = block_core_navigation_filter_out_empty_blocks( $parsed_blocks );

// Normalizing blocks may result in an empty array of blocks if they were all `null` blocks.
		// In this case default to the (Page List) fallback.
		$fallback_blocks = ! empty( $maybe_fallback ) ? $maybe_fallback : $fallback_blocks;

// Run Block Hooks algorithm to inject hooked blocks.
		// We have to run it here because we need the post ID of the Navigation block to track ignored hooked blocks.
		// TODO: See if we can move the apply_block_hooks_to_content_from_post_object() call
		// before the parse_blocks() call further above, to avoid the extra serialization/parsing.
		$markup          = serialize_blocks( $fallback_blocks );
		$markup          = apply_block_hooks_to_content_from_post_object( $markup, $navigation_post );
		$fallback_blocks = parse_blocks( $markup );
	}

/**
	 * Filters the fallback experience for the Navigation block.
	 *
	 * Returning a falsey value will opt out of the fallback and cause the block not to render.
	 * To customise the blocks provided return an array of blocks - these should be valid
	 * children of the `core/navigation` block.
	 *
	 * @since 5.9.0
	 *
	 * @param array[] $fallback_blocks default fallback blocks provided by the default block mechanic.
	 */
	return apply_filters( 'block_core_navigation_render_fallback', $fallback_blocks );
}

/**
 * Iterate through all inner blocks recursively and get navigation link block's post IDs.
 *
 * @since 6.0.0
 *
 * @param WP_Block_List $inner_blocks Block list class instance.
 *
 * @return array Array of post IDs.
 */
function block_core_navigation_get_post_ids( $inner_blocks ) {
	$post_ids = array_map( 'block_core_navigation_from_block_get_post_ids', iterator_to_array( $inner_blocks ) );
	return array_unique( array_merge( ...$post_ids ) );
}

/**
 * Get post IDs from a navigation link block instance.
 *
 * @since 6.0.0
 *
 * @param WP_Block $block Instance of a block.
 *
 * @return array Array of post IDs.
 */
function block_core_navigation_from_block_get_post_ids( $block ) {
	$post_ids = array();

if ( $block->inner_blocks ) {
		$post_ids = block_core_navigation_get_post_ids( $block->inner_blocks );
	}

if ( 'core/navigation-link' === $block->name || 'core/navigation-submenu' === $block->name ) {
		if ( $block->attributes && isset( $block->attributes['kind'] ) && 'post-type' === $block->attributes['kind'] && isset( $block->attributes['id'] ) ) {
			$post_ids[] = $block->attributes['id'];
		}
	}

return $post_ids;
}

/**
 * Renders the `core/navigation` block on server.
 *
 * @since 5.9.0
 *
 * @param array    $attributes The block attributes.
 * @param string   $content    The saved content.
 * @param WP_Block $block      The parsed block.
 *
 * @return string Returns the navigation block markup.
 */
function render_block_core_navigation( $attributes, $content, $block ) {
	return WP_Navigation_Block_Renderer::render( $attributes, $content, $block );
}

/**
 * Register the navigation block.
 *
 * @since 5.9.0
 *
 * @uses render_block_core_navigation()
 * @throws WP_Error An WP_Error exception parsing the block definition.
 */
function register_block_core_navigation() {
	register_block_type_from_metadata(
		__DIR__ . '/navigation',
		array(
			'render_callback' => 'render_block_core_navigation',
		)
	);
}

add_action( 'init', 'register_block_core_navigation' );

/**
 * Adds Navigation block support classes to inner list containers.
 *
 * State block support adds the generated `wp-states-*` class to the outer
 * block wrapper. The Navigation block renders its menu items inside an inner
 * `wp-block-navigation__container` list, so the same state class is also needed
 * there for state styles to apply directly to the menu list.
 *
 * Navigation also uses layout classes on its outer wrapper to define custom
 * properties consumed by its inner containers. Viewport layout styles cannot
 * change those classes, so equivalent custom properties and a scoping class
 * are generated for each configured viewport layout.
 *
 * Currently this is required as a workaround because of how difficult it is for nav
 * child blocks to inherit styles through the complex responsive nav block html. The
 * bug in https://github.com/WordPress/gutenberg/issues/62690 also prevents inheritance.
 *
 * @since 7.1.0
 *
 * @param string $block_content The block content.
 * @param array  $block         The full block, including name and attributes.
 * @return string The updated block content.
 */
function block_core_navigation_add_support_classes_to_container( $block_content, $block ) {
	if ( 'core/navigation' !== ( $block['blockName'] ?? null ) || empty( $block_content ) ) {
		return $block_content;
	}

$attributes = is_array( $block['attrs'] ?? null ) ? $block['attrs'] : array();
	$style      = is_array( $attributes['style'] ?? null ) ? $attributes['style'] : array();
	if (
		defined( 'IS_GUTENBERG_PLUGIN' ) &&
		IS_GUTENBERG_PLUGIN &&
		function_exists( 'gutenberg_resolve_style_state_aliases' )
	) {
		$style = gutenberg_resolve_style_state_aliases( $style, 'core/navigation' );
	}

$global_settings          = wp_get_global_settings();
	$viewport_settings        = $global_settings['viewport'] ?? null;
	$responsive_media_queries = array();
	if ( method_exists( 'WP_Theme_JSON_Gutenberg', 'get_viewport_media_queries' ) ) {
		$responsive_media_queries = WP_Theme_JSON_Gutenberg::get_viewport_media_queries( $viewport_settings );
	} elseif ( method_exists( 'WP_Theme_JSON', 'get_viewport_media_queries' ) ) {
		$responsive_media_queries = WP_Theme_JSON::get_viewport_media_queries( $viewport_settings );
	}

$styles      = array();
	$base_layout = is_array( $attributes['layout'] ?? null ) ? $attributes['layout'] : array();
	foreach ( $responsive_media_queries as $breakpoint => $media_query ) {
		$viewport_style  = is_array( $style[ $breakpoint ] ?? null ) ? $style[ $breakpoint ] : array();
		$viewport_layout = is_array( $viewport_style['layout'] ?? null ) ? $viewport_style['layout'] : array();
		if ( empty( $viewport_layout ) ) {
			continue;
		}

$styles[] = array(
			'declarations' => block_core_navigation_get_layout_custom_property_declarations(
				array_replace( $base_layout, $viewport_layout )
			),
			'rules_group'  => $media_query,
		);
	}

$processor = new WP_HTML_Tag_Processor( $block_content );
	if ( ! $processor->next_tag() ) {
		return $block_content;
	}

$class_attribute = $processor->get_attribute( 'class' );
	$state_class     = null;
	if ( is_string( $class_attribute ) && preg_match( '/\bwp-states-[a-f0-9]{8}\b/', $class_attribute, $matches ) ) {
		$state_class = $matches[0];
	}

$layout_class = null;
	if ( ! empty( $styles ) ) {
		$layout_class = wp_unique_id( 'wp-block-navigation-' );
		// The inner selector includes both Navigation classes so it overrides the
		// default layout custom properties set by `.wp-block-navigation.items-*`.
		$selector = ".wp-block-navigation.{$layout_class},.wp-block-navigation.wp-block-navigation__container.{$layout_class}";
		foreach ( $styles as &$style_rule ) {
			$style_rule['selector'] = $selector;
		}
		unset( $style_rule );

$processor->add_class( $layout_class );
		wp_style_engine_get_stylesheet_from_css_rules(
			$styles,
			array( 'context' => 'block-supports' )
		);
	}

if ( null === $state_class && null === $layout_class ) {
		return $block_content;
	}

while ( $processor->next_tag() ) {
		// Custom overlay content can include nested Navigation blocks.
		// Avoid applying the outer Navigation classes to an inner nav block.
		if ( $processor->has_class( 'wp-block-navigation' ) && ! $processor->has_class( 'wp-block-navigation__container' ) ) {
			break;
		}

if ( ! $processor->has_class( 'wp-block-navigation__container' ) ) {
			continue;
		}

if ( null !== $layout_class ) {
			$processor->add_class( $layout_class );
		}

if ( null === $state_class ) {
			continue;
		}

$class_attribute = $processor->get_attribute( 'class' );
		if ( is_string( $class_attribute ) && preg_match( '/\bwp-states-[a-f0-9]{8}\b/', $class_attribute ) ) {
			continue;
		}

$processor->add_class( $state_class );
	}

return $processor->get_updated_html();
}

add_filter( 'render_block', 'block_core_navigation_add_support_classes_to_container', 11, 2 );

/**
 * Filter that changes the parsed attribute values of navigation blocks contain typographic presets to contain the values directly.
 *
 * @since 5.9.0
 *
 * @param array $parsed_block The block being rendered.
 *
 * @return array The block being rendered without typographic presets.
 */
function block_core_navigation_typographic_presets_backcompatibility( $parsed_block ) {
	if ( 'core/navigation' === $parsed_block['blockName'] ) {
		$attribute_to_prefix_map = array(
			'fontStyle'      => 'var:preset|font-style|',
			'fontWeight'     => 'var:preset|font-weight|',
			'textDecoration' => 'var:preset|text-decoration|',
			'textTransform'  => 'var:preset|text-transform|',
		);
		foreach ( $attribute_to_prefix_map as $style_attribute => $prefix ) {
			if ( ! empty( $parsed_block['attrs']['style']['typography'][ $style_attribute ] ) ) {
				$prefix_len      = strlen( $prefix );
				$attribute_value = &$parsed_block['attrs']['style']['typography'][ $style_attribute ];
				if ( 0 === strncmp( $attribute_value, $prefix, $prefix_len ) ) {
					$attribute_value = substr( $attribute_value, $prefix_len );
				}
				if ( 'textDecoration' === $style_attribute && 'strikethrough' === $attribute_value ) {
					$attribute_value = 'line-through';
				}
			}
		}
	}

return $parsed_block;
}

add_filter( 'render_block_data', 'block_core_navigation_typographic_presets_backcompatibility' );

/**
 * Turns menu item data into a nested array of parsed blocks
 *
 * @since 5.9.0
 *
 * @deprecated 6.3.0 Use WP_Navigation_Fallback::parse_blocks_from_menu_items() instead.
 *
 * @param array $menu_items               An array of menu items that represent
 *                                        an individual level of a menu.
 * @param array $menu_items_by_parent_id  An array keyed by the id of the
 *                                        parent menu where each element is an
 *                                        array of menu items that belong to
 *                                        that parent.
 * @return array An array of parsed block data.
 */
function block_core_navigation_parse_blocks_from_menu_items( $menu_items, $menu_items_by_parent_id ) {

_deprecated_function( __FUNCTION__, '6.3.0', 'WP_Navigation_Fallback::parse_blocks_from_menu_items' );

if ( empty( $menu_items ) ) {
		return array();
	}

$blocks = array();

foreach ( $menu_items as $menu_item ) {
		$class_name       = ! empty( $menu_item->classes ) ? implode( ' ', (array) $menu_item->classes ) : null;
		$id               = ( null !== $menu_item->object_id && 'custom' !== $menu_item->object ) ? $menu_item->object_id : null;
		$opens_in_new_tab = null !== $menu_item->target && '_blank' === $menu_item->target;
		$rel              = ( null !== $menu_item->xfn && '' !== $menu_item->xfn ) ? $menu_item->xfn : null;
		$kind             = null !== $menu_item->type ? str_replace( '_', '-', $menu_item->type ) : 'custom';

$block = array(
			'blockName' => isset( $menu_items_by_parent_id[ $menu_item->ID ] ) ? 'core/navigation-submenu' : 'core/navigation-link',
			'attrs'     => array(
				'className'     => $class_name,
				'description'   => $menu_item->description,
				'id'            => $id,
				'kind'          => $kind,
				'label'         => $menu_item->title,
				'opensInNewTab' => $opens_in_new_tab,
				'rel'           => $rel,
				'title'         => $menu_item->attr_title,
				'type'          => $menu_item->object,
				'url'           => $menu_item->url,
			),
		);

$block['innerBlocks']  = isset( $menu_items_by_parent_id[ $menu_item->ID ] )
			? block_core_navigation_parse_blocks_from_menu_items( $menu_items_by_parent_id[ $menu_item->ID ], $menu_items_by_parent_id )
			: array();
		$block['innerContent'] = array_map( 'serialize_block', $block['innerBlocks'] );

$blocks[] = $block;
	}

return $blocks;
}

/**
 * Get the classic navigation menu to use as a fallback.
 *
 * @since 6.2.0
 *
 * @deprecated 6.3.0 Use WP_Navigation_Fallback::get_classic_menu_fallback() instead.
 *
 * @return object WP_Term The classic navigation.
 */
function block_core_navigation_get_classic_menu_fallback() {

_deprecated_function( __FUNCTION__, '6.3.0', 'WP_Navigation_Fallback::get_classic_menu_fallback' );

$classic_nav_menus = wp_get_nav_menus();

// If menus exist.
	if ( $classic_nav_menus && ! is_wp_error( $classic_nav_menus ) ) {
		// Handles simple use case where user has a classic menu and switches to a block theme.

// Returns the menu assigned to location `primary`.
		$locations = get_nav_menu_locations();
		if ( isset( $locations['primary'] ) ) {
			$primary_menu = wp_get_nav_menu_object( $locations['primary'] );
			if ( $primary_menu ) {
				return $primary_menu;
			}
		}

// Returns a menu if `primary` is its slug.
		foreach ( $classic_nav_menus as $classic_nav_menu ) {
			if ( 'primary' === $classic_nav_menu->slug ) {
				return $classic_nav_menu;
			}
		}

// Otherwise return the most recently created classic menu.
		usort(
			$classic_nav_menus,
			static function ( $a, $b ) {
				return $b->term_id - $a->term_id;
			}
		);
		return $classic_nav_menus[0];
	}
}

/**
 * Converts a classic navigation to blocks.
 *
 * @since 6.2.0
 *
 * @deprecated 6.3.0 Use WP_Navigation_Fallback::get_classic_menu_fallback_blocks() instead.
 *
 * @param  object $classic_nav_menu WP_Term The classic navigation object to convert.
 * @return array the normalized parsed blocks.
 */
function block_core_navigation_get_classic_menu_fallback_blocks( $classic_nav_menu ) {

_deprecated_function( __FUNCTION__, '6.3.0', 'WP_Navigation_Fallback::get_classic_menu_fallback_blocks' );

// BEGIN: Code that already exists in wp_nav_menu().
	$menu_items = wp_get_nav_menu_items( $classic_nav_menu->term_id, array( 'update_post_term_cache' => false ) );

// Set up the $menu_item variables.
	_wp_menu_item_classes_by_context( $menu_items );

$sorted_menu_items = array();
	foreach ( (array) $menu_items as $menu_item ) {
		$sorted_menu_items[ $menu_item->menu_order ] = $menu_item;
	}

unset( $menu_items, $menu_item );

// END: Code that already exists in wp_nav_menu().

$menu_items_by_parent_id = array();
	foreach ( $sorted_menu_items as $menu_item ) {
		$menu_items_by_parent_id[ $menu_item->menu_item_parent ][] = $menu_item;
	}

$inner_blocks = block_core_navigation_parse_blocks_from_menu_items(
		$menu_items_by_parent_id[0] ?? array(),
		$menu_items_by_parent_id
	);

return serialize_blocks( $inner_blocks );
}

/**
 * If there's a classic menu then use it as a fallback.
 *
 * @since 6.2.0
 *
 * @deprecated 6.3.0 Use WP_Navigation_Fallback::create_classic_menu_fallback() instead.
 *
 * @return array the normalized parsed blocks.
 */
function block_core_navigation_maybe_use_classic_menu_fallback() {

_deprecated_function( __FUNCTION__, '6.3.0', 'WP_Navigation_Fallback::create_classic_menu_fallback' );

// See if we have a classic menu.
	$classic_nav_menu = block_core_navigation_get_classic_menu_fallback();

if ( ! $classic_nav_menu ) {
		return;
	}

// If we have a classic menu then convert it to blocks.
	$classic_nav_menu_blocks = block_core_navigation_get_classic_menu_fallback_blocks( $classic_nav_menu );

if ( empty( $classic_nav_menu_blocks ) ) {
		return;
	}

// Create a new navigation menu from the classic menu.
	$wp_insert_post_result = wp_insert_post(
		array(
			'post_content' => $classic_nav_menu_blocks,
			'post_title'   => $classic_nav_menu->name,
			'post_name'    => $classic_nav_menu->slug,
			'post_status'  => 'publish',
			'post_type'    => 'wp_navigation',
		),
		true // So that we can check whether the result is an error.
	);

if ( is_wp_error( $wp_insert_post_result ) ) {
		return;
	}

// Fetch the most recently published navigation which will be the classic one created above.
	return block_core_navigation_get_most_recently_published_navigation();
}

/**
 * Finds the most recently published `wp_navigation` Post.
 *
 * @since 6.1.0
 *
 * @deprecated 6.3.0 Use WP_Navigation_Fallback::get_most_recently_published_navigation() instead.
 *
 * @return WP_Post|null the first non-empty Navigation or null.
 */
function block_core_navigation_get_most_recently_published_navigation() {

_deprecated_function( __FUNCTION__, '6.3.0', 'WP_Navigation_Fallback::get_most_recently_published_navigation' );

// Default to the most recently created menu.
	$parsed_args = array(
		'post_type'              => 'wp_navigation',
		'no_found_rows'          => true,
		'update_post_meta_cache' => false,
		'update_post_term_cache' => false,
		'order'                  => 'DESC',
		'orderby'                => 'date',
		'post_status'            => 'publish',
		'posts_per_page'         => 1, // get only the most recent.
	);

$navigation_post = new WP_Query( $parsed_args );
	if ( count( $navigation_post->posts ) > 0 ) {
		return $navigation_post->posts[0];
	}

return null;
}

cmd: