19

var/www/html/holz-ideen-emsland.de/wp-includes | uid:33

blocks.php [X]

<?php
/**
 * Functions related to registering and parsing blocks.
 *
 * @package WordPress
 * @subpackage Blocks
 * @since 5.0.0
 */

/**
 * Removes the block asset's path prefix if provided.
 *
 * @since 5.5.0
 *
 * @param string $asset_handle_or_path Asset handle or prefixed path.
 * @return string Path without the prefix or the original value.
 */
function remove_block_asset_path_prefix( $asset_handle_or_path ) {
	$path_prefix = 'file:';
	if ( ! str_starts_with( $asset_handle_or_path, $path_prefix ) ) {
		return $asset_handle_or_path;
	}
	$path = substr(
		$asset_handle_or_path,
		strlen( $path_prefix )
	);
	if ( str_starts_with( $path, './' ) ) {
		$path = substr( $path, 2 );
	}
	return $path;
}

/**
 * Generates the name for an asset based on the name of the block
 * and the field name provided.
 *
 * @since 5.5.0
 * @since 6.1.0 Added `$index` parameter.
 * @since 6.5.0 Added support for `viewScriptModule` field.
 *
 * @param string $block_name Name of the block.
 * @param string $field_name Name of the metadata field.
 * @param int    $index      Optional. Index of the asset when multiple items passed.
 *                           Default 0.
 * @return string Generated asset name for the block's field.
 */
function generate_block_asset_handle( $block_name, $field_name, $index = 0 ) {
	if ( str_starts_with( $block_name, 'core/' ) ) {
		$asset_handle = str_replace( 'core/', 'wp-block-', $block_name );
		if ( str_starts_with( $field_name, 'editor' ) ) {
			$asset_handle .= '-editor';
		}
		if ( str_starts_with( $field_name, 'view' ) ) {
			$asset_handle .= '-view';
		}
		if ( str_ends_with( strtolower( $field_name ), 'scriptmodule' ) ) {
			$asset_handle .= '-script-module';
		}
		if ( $index > 0 ) {
			$asset_handle .= '-' . ( $index + 1 );
		}
		return $asset_handle;
	}

$field_mappings = array(
		'editorScript'     => 'editor-script',
		'editorStyle'      => 'editor-style',
		'script'           => 'script',
		'style'            => 'style',
		'viewScript'       => 'view-script',
		'viewScriptModule' => 'view-script-module',
		'viewStyle'        => 'view-style',
	);
	$asset_handle   = str_replace( '/', '-', $block_name ) .
		'-' . $field_mappings[ $field_name ];
	if ( $index > 0 ) {
		$asset_handle .= '-' . ( $index + 1 );
	}
	return $asset_handle;
}

/**
 * Gets the URL to a block asset.
 *
 * @since 6.4.0
 *
 * @param string $path A normalized path to a block asset.
 * @return string|false The URL to the block asset or false on failure.
 */
function get_block_asset_url( $path ) {
	if ( empty( $path ) ) {
		return false;
	}

// Path needs to be normalized to work in Windows env.
	static $wpinc_path_norm = '';
	if ( ! $wpinc_path_norm ) {
		$wpinc_path_norm = wp_normalize_path( realpath( ABSPATH . WPINC ) );
	}

if ( str_starts_with( $path, $wpinc_path_norm ) ) {
		return includes_url( str_replace( $wpinc_path_norm, '', $path ) );
	}

static $template_paths_norm = array();

$template = get_template();
	if ( ! isset( $template_paths_norm[ $template ] ) ) {
		$template_paths_norm[ $template ] = wp_normalize_path( realpath( get_template_directory() ) );
	}

if ( str_starts_with( $path, trailingslashit( $template_paths_norm[ $template ] ) ) ) {
		return get_theme_file_uri( str_replace( $template_paths_norm[ $template ], '', $path ) );
	}

if ( is_child_theme() ) {
		$stylesheet = get_stylesheet();
		if ( ! isset( $template_paths_norm[ $stylesheet ] ) ) {
			$template_paths_norm[ $stylesheet ] = wp_normalize_path( realpath( get_stylesheet_directory() ) );
		}

if ( str_starts_with( $path, trailingslashit( $template_paths_norm[ $stylesheet ] ) ) ) {
			return get_theme_file_uri( str_replace( $template_paths_norm[ $stylesheet ], '', $path ) );
		}
	}

return plugins_url( basename( $path ), $path );
}

/**
 * Finds a script module ID for the selected block metadata field. It detects
 * when a path to file was provided and optionally finds a corresponding asset
 * file with details necessary to register the script module under with an
 * automatically generated module ID. It returns unprocessed script module
 * ID otherwise.
 *
 * @since 6.5.0
 *
 * @param array  $metadata   Block metadata.
 * @param string $field_name Field name to pick from metadata.
 * @param int    $index      Optional. Index of the script module ID to register when multiple
 *                           items passed. Default 0.
 * @return string|false Script module ID or false on failure.
 */
function register_block_script_module_id( $metadata, $field_name, $index = 0 ) {
	if ( empty( $metadata[ $field_name ] ) ) {
		return false;
	}

$module_id = $metadata[ $field_name ];
	if ( is_array( $module_id ) ) {
		if ( empty( $module_id[ $index ] ) ) {
			return false;
		}
		$module_id = $module_id[ $index ];
	}

$module_path = remove_block_asset_path_prefix( $module_id );
	if ( $module_id === $module_path ) {
		return $module_id;
	}

$path                  = dirname( $metadata['file'] );
	$module_asset_raw_path = $path . '/' . substr_replace( $module_path, '.asset.php', - strlen( '.js' ) );
	$module_id             = generate_block_asset_handle( $metadata['name'], $field_name, $index );
	$module_asset_path     = wp_normalize_path(
		realpath( $module_asset_raw_path )
	);

$module_path_norm = wp_normalize_path( realpath( $path . '/' . $module_path ) );
	$module_uri       = get_block_asset_url( $module_path_norm );

$module_asset        = ! empty( $module_asset_path ) ? require $module_asset_path : array();
	$module_dependencies = $module_asset['dependencies'] ?? array();
	$block_version       = $metadata['version'] ?? false;
	$module_version      = $module_asset['version'] ?? $block_version;

$supports_interactivity_true = isset( $metadata['supports']['interactivity'] ) && true === $metadata['supports']['interactivity'];
	$is_interactive              = $supports_interactivity_true || ( isset( $metadata['supports']['interactivity']['interactive'] ) && true === $metadata['supports']['interactivity']['interactive'] );
	$supports_client_navigation  = $supports_interactivity_true || ( isset( $metadata['supports']['interactivity']['clientNavigation'] ) && true === $metadata['supports']['interactivity']['clientNavigation'] );

$args = array();

// Blocks using the Interactivity API are server-side rendered, so they are
	// by design not in the critical rendering path and should be deprioritized.
	if ( $is_interactive ) {
		$args['fetchpriority'] = 'low';
		$args['in_footer']     = true;
	}

// Blocks using the Interactivity API that support client-side navigation
	// must be marked as such in their script modules.
	if ( $is_interactive && $supports_client_navigation ) {
		wp_interactivity()->add_client_navigation_support_to_script_module( $module_id );
	}

wp_register_script_module(
		$module_id,
		$module_uri,
		$module_dependencies,
		$module_version,
		$args
	);

return $module_id;
}

/**
 * Finds a script handle for the selected block metadata field. It detects
 * when a path to file was provided and optionally finds a corresponding asset
 * file with details necessary to register the script under automatically
 * generated handle name. It returns unprocessed script handle otherwise.
 *
 * @since 5.5.0
 * @since 6.1.0 Added `$index` parameter.
 * @since 6.5.0 The asset file is optional. Added script handle support in the asset file.
 *
 * @param array  $metadata   Block metadata.
 * @param string $field_name Field name to pick from metadata.
 * @param int    $index      Optional. Index of the script to register when multiple items passed.
 *                           Default 0.
 * @return string|false Script handle provided directly or created through
 *                      script's registration, or false on failure.
 */
function register_block_script_handle( $metadata, $field_name, $index = 0 ) {
	if ( empty( $metadata[ $field_name ] ) ) {
		return false;
	}

$script_handle_or_path = $metadata[ $field_name ];
	if ( is_array( $script_handle_or_path ) ) {
		if ( empty( $script_handle_or_path[ $index ] ) ) {
			return false;
		}
		$script_handle_or_path = $script_handle_or_path[ $index ];
	}

$script_path = remove_block_asset_path_prefix( $script_handle_or_path );
	if ( $script_handle_or_path === $script_path ) {
		return $script_handle_or_path;
	}

$path                  = dirname( $metadata['file'] );
	$script_asset_raw_path = $path . '/' . substr_replace( $script_path, '.asset.php', - strlen( '.js' ) );
	$script_asset_path     = wp_normalize_path(
		realpath( $script_asset_raw_path )
	);

// Asset file for blocks is optional. See https://core.trac.wordpress.org/ticket/60460.
	$script_asset  = ! empty( $script_asset_path ) ? require $script_asset_path : array();
	$script_handle = $script_asset['handle'] ??
		generate_block_asset_handle( $metadata['name'], $field_name, $index );
	if ( wp_script_is( $script_handle, 'registered' ) ) {
		return $script_handle;
	}

$script_path_norm    = wp_normalize_path( realpath( $path . '/' . $script_path ) );
	$script_uri          = get_block_asset_url( $script_path_norm );
	$script_dependencies = $script_asset['dependencies'] ?? array();
	$block_version       = $metadata['version'] ?? false;
	$script_version      = $script_asset['version'] ?? $block_version;
	$script_args         = array();
	if ( 'viewScript' === $field_name && $script_uri ) {
		$script_args['strategy'] = 'defer';
	}

$result = wp_register_script(
		$script_handle,
		$script_uri,
		$script_dependencies,
		$script_version,
		$script_args
	);
	if ( ! $result ) {
		return false;
	}

if ( ! empty( $metadata['textdomain'] ) && in_array( 'wp-i18n', $script_dependencies, true ) ) {
		wp_set_script_translations( $script_handle, $metadata['textdomain'] );
	}

return $script_handle;
}

/**
 * Finds a style handle for the block metadata field. It detects when a path
 * to file was provided and registers the style under automatically
 * generated handle name. It returns unprocessed style handle otherwise.
 *
 * @since 5.5.0
 * @since 6.1.0 Added `$index` parameter.
 *
 * @param array  $metadata   Block metadata.
 * @param string $field_name Field name to pick from metadata.
 * @param int    $index      Optional. Index of the style to register when multiple items passed.
 *                           Default 0.
 * @return string|false Style handle provided directly or created through
 *                      style's registration, or false on failure.
 */
function register_block_style_handle( $metadata, $field_name, $index = 0 ) {
	if ( empty( $metadata[ $field_name ] ) ) {
		return false;
	}

$style_handle = $metadata[ $field_name ];
	if ( is_array( $style_handle ) ) {
		if ( empty( $style_handle[ $index ] ) ) {
			return false;
		}
		$style_handle = $style_handle[ $index ];
	}

$style_handle_name = generate_block_asset_handle( $metadata['name'], $field_name, $index );
	// If the style handle is already registered, skip re-registering.
	if ( wp_style_is( $style_handle_name, 'registered' ) ) {
		return $style_handle_name;
	}

static $wpinc_path_norm = '';
	if ( ! $wpinc_path_norm ) {
		$wpinc_path_norm = wp_normalize_path( realpath( ABSPATH . WPINC ) );
	}

$is_core_block = isset( $metadata['file'] ) && str_starts_with( $metadata['file'], $wpinc_path_norm );
	// Skip registering individual styles for each core block when a bundled version provided.
	if ( $is_core_block && ! wp_should_load_separate_core_block_assets() ) {
		return false;
	}

$style_path      = remove_block_asset_path_prefix( $style_handle );
	$is_style_handle = $style_handle === $style_path;
	// Allow only passing style handles for core blocks.
	if ( $is_core_block && ! $is_style_handle ) {
		return false;
	}
	// Return the style handle unless it's the first item for every core block that requires special treatment.
	if ( $is_style_handle && ! ( $is_core_block && 0 === $index ) ) {
		return $style_handle;
	}

// Check whether styles should have a ".min" suffix or not.
	$suffix = SCRIPT_DEBUG ? '' : '.min';
	if ( $is_core_block ) {
		$style_path = ( 'editorStyle' === $field_name ) ? "editor{$suffix}.css" : "style{$suffix}.css";
	}

$style_path_norm = wp_normalize_path( realpath( dirname( $metadata['file'] ) . '/' . $style_path ) );
	$style_uri       = get_block_asset_url( $style_path_norm );

$block_version = ! $is_core_block && isset( $metadata['version'] ) ? $metadata['version'] : false;
	$version       = $style_path_norm && defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ? filemtime( $style_path_norm ) : $block_version;
	$result        = wp_register_style(
		$style_handle_name,
		$style_uri,
		array(),
		$version
	);
	if ( ! $result ) {
		return false;
	}

if ( $style_uri ) {
		wp_style_add_data( $style_handle_name, 'path', $style_path_norm );

if ( $is_core_block ) {
			$rtl_file = str_replace( "{$suffix}.css", "-rtl{$suffix}.css", $style_path_norm );
		} else {
			$rtl_file = str_replace( '.css', '-rtl.css', $style_path_norm );
		}

if ( is_rtl() && file_exists( $rtl_file ) ) {
			wp_style_add_data( $style_handle_name, 'rtl', 'replace' );
			wp_style_add_data( $style_handle_name, 'suffix', $suffix );
			wp_style_add_data( $style_handle_name, 'path', $rtl_file );
		}
	}

return $style_handle_name;
}

/**
 * Gets i18n schema for block's metadata read from `block.json` file.
 *
 * @since 5.9.0
 *
 * @return object The schema for block's metadata.
 */
function get_block_metadata_i18n_schema() {
	static $i18n_block_schema;

if ( ! isset( $i18n_block_schema ) ) {
		$i18n_block_schema = wp_json_file_decode( __DIR__ . '/block-i18n.json' );
	}

return $i18n_block_schema;
}

/**
 * Registers all block types from a block metadata collection.
 *
 * This can either reference a previously registered metadata collection or, if the `$manifest` parameter is provided,
 * register the metadata collection directly within the same function call.
 *
 * @since 6.8.0
 * @see wp_register_block_metadata_collection()
 * @see register_block_type_from_metadata()
 *
 * @param string $path     The absolute base path for the collection ( e.g., WP_PLUGIN_DIR . '/my-plugin/blocks/' ).
 * @param string $manifest Optional. The absolute path to the manifest file containing the metadata collection, in
 *                         order to register the collection. If this parameter is not provided, the `$path` parameter
 *                         must reference a previously registered block metadata collection.
 */
function wp_register_block_types_from_metadata_collection( $path, $manifest = '' ) {
	if ( $manifest ) {
		wp_register_block_metadata_collection( $path, $manifest );
	}

$block_metadata_files = WP_Block_Metadata_Registry::get_collection_block_metadata_files( $path );
	foreach ( $block_metadata_files as $block_metadata_file ) {
		register_block_type_from_metadata( $block_metadata_file );
	}
}

/**
 * Registers a block metadata collection.
 *
 * This function allows core and third-party plugins to register their block metadata
 * collections in a centralized location. Registering collections can improve performance
 * by avoiding multiple reads from the filesystem and parsing JSON.
 *
 * @since 6.7.0
 *
 * @param string $path     The base path in which block files for the collection reside.
 * @param string $manifest The path to the manifest file for the collection.
 */
function wp_register_block_metadata_collection( $path, $manifest ) {
	WP_Block_Metadata_Registry::register_collection( $path, $manifest );
}

/**
 * Registers a block type from the metadata stored in the `block.json` file.
 *
 * @since 5.5.0
 * @since 5.7.0 Added support for `textdomain` field and i18n handling for all translatable fields.
 * @since 5.9.0 Added support for `variations` and `viewScript` fields.
 * @since 6.1.0 Added support for `render` field.
 * @since 6.3.0 Added `selectors` field.
 * @since 6.4.0 Added support for `blockHooks` field.
 * @since 6.5.0 Added support for `allowedBlocks`, `viewScriptModule`, and `viewStyle` fields.
 * @since 6.7.0 Allow PHP filename as `variations` argument.
 *
 * @param string $file_or_folder Path to the JSON file with metadata definition for
 *                               the block or path to the folder where the `block.json` file is located.
 *                               If providing the path to a JSON file, the filename must end with `block.json`.
 * @param array  $args           Optional. Array of block type arguments. Accepts any public property
 *                               of `WP_Block_Type`. See WP_Block_Type::__construct() for information
 *                               on accepted arguments. Default empty array.
 * @return WP_Block_Type|false The registered block type on success, or false on failure.
 */
function register_block_type_from_metadata( $file_or_folder, $args = array() ) {
	/*
	 * Get an array of metadata from a PHP file.
	 * This improves performance for core blocks as it's only necessary to read a single PHP file
	 * instead of reading a JSON file per-block, and then decoding from JSON to PHP.
	 * Using a static variable ensures that the metadata is only read once per request.
	 */

$file_or_folder = wp_normalize_path( $file_or_folder );

$metadata_file = ( ! str_ends_with( $file_or_folder, 'block.json' ) ) ?
		trailingslashit( $file_or_folder ) . 'block.json' :
		$file_or_folder;

$is_core_block        = str_starts_with( $file_or_folder, wp_normalize_path( ABSPATH . WPINC ) );
	$metadata_file_exists = $is_core_block || file_exists( $metadata_file );
	$registry_metadata    = WP_Block_Metadata_Registry::get_metadata( $file_or_folder );

if ( $registry_metadata ) {
		$metadata = $registry_metadata;
	} elseif ( $metadata_file_exists ) {
		$metadata = wp_json_file_decode( $metadata_file, array( 'associative' => true ) );
	} else {
		$metadata = array();
	}

if ( ! is_array( $metadata ) || ( empty( $metadata['name'] ) && empty( $args['name'] ) ) ) {
		return false;
	}

$metadata['file'] = $metadata_file_exists ? wp_normalize_path( realpath( $metadata_file ) ) : null;

/**
	 * Filters the metadata provided for registering a block type.
	 *
	 * @since 5.7.0
	 *
	 * @param array $metadata Metadata for registering a block type.
	 */
	$metadata = apply_filters( 'block_type_metadata', $metadata );

// Add `style` and `editor_style` for core blocks if missing.
	if ( ! empty( $metadata['name'] ) && str_starts_with( $metadata['name'], 'core/' ) ) {
		$block_name = str_replace( 'core/', '', $metadata['name'] );

if ( ! isset( $metadata['style'] ) ) {
			$metadata['style'] = "wp-block-$block_name";
		}
		if ( current_theme_supports( 'wp-block-styles' ) && wp_should_load_separate_core_block_assets() ) {
			$metadata['style']   = (array) $metadata['style'];
			$metadata['style'][] = "wp-block-{$block_name}-theme";
		}
		if ( ! isset( $metadata['editorStyle'] ) ) {
			$metadata['editorStyle'] = "wp-block-{$block_name}-editor";
		}
	}

$settings          = array();
	$property_mappings = array(
		'apiVersion'      => 'api_version',
		'name'            => 'name',
		'title'           => 'title',
		'category'        => 'category',
		'parent'          => 'parent',
		'ancestor'        => 'ancestor',
		'icon'            => 'icon',
		'description'     => 'description',
		'keywords'        => 'keywords',
		'attributes'      => 'attributes',
		'providesContext' => 'provides_context',
		'usesContext'     => 'uses_context',
		'selectors'       => 'selectors',
		'supports'        => 'supports',
		'styles'          => 'styles',
		'variations'      => 'variations',
		'example'         => 'example',
		'allowedBlocks'   => 'allowed_blocks',
	);
	$textdomain        = ! empty( $metadata['textdomain'] ) ? $metadata['textdomain'] : null;
	$i18n_schema       = get_block_metadata_i18n_schema();

foreach ( $property_mappings as $key => $mapped_key ) {
		if ( isset( $metadata[ $key ] ) ) {
			$settings[ $mapped_key ] = $metadata[ $key ];
			if ( $metadata_file_exists && $textdomain && isset( $i18n_schema->$key ) ) {
				$settings[ $mapped_key ] = translate_settings_using_i18n_schema( $i18n_schema->$key, $settings[ $key ], $textdomain );
			}
		}
	}

if ( ! empty( $metadata['render'] ) ) {
		$template_path = wp_normalize_path(
			realpath(
				dirname( $metadata['file'] ) . '/' .
				remove_block_asset_path_prefix( $metadata['render'] )
			)
		);
		if ( $template_path ) {
			/**
			 * Renders the block on the server.
			 *
			 * @since 6.1.0
			 *
			 * @param array    $attributes Block attributes.
			 * @param string   $content    Block default content.
			 * @param WP_Block $block      Block instance.
			 *
			 * @return string Returns the block content.
			 */
			$settings['render_callback'] = static function ( $attributes, $content, $block ) use ( $template_path ) {
				ob_start();
				require $template_path;
				return ob_get_clean();
			};
		}
	}

// If `variations` is a string, it's the name of a PHP file that
	// generates the variations.
	if ( ! empty( $metadata['variations'] ) && is_string( $metadata['variations'] ) ) {
		$variations_path = wp_normalize_path(
			realpath(
				dirname( $metadata['file'] ) . '/' .
				remove_block_asset_path_prefix( $metadata['variations'] )
			)
		);
		if ( $variations_path ) {
			/**
			 * Generates the list of block variations.
			 *
			 * @since 6.7.0
			 *
			 * @return string Returns the list of block variations.
			 */
			$settings['variation_callback'] = static function () use ( $variations_path ) {
				$variations = require $variations_path;
				return $variations;
			};
			// The block instance's `variations` field is only allowed to be an array
			// (of known block variations). We unset it so that the block instance will
			// provide a getter that returns the result of the `variation_callback` instead.
			unset( $settings['variations'] );
		}
	}

$settings = array_merge( $settings, $args );

$script_fields = array(
		'editorScript' => 'editor_script_handles',
		'script' => 'script_handles',
		'viewScript' => 'view_script_handles',
	);
	foreach ( $script_fields as $metadata_field_name => $settings_field_name ) {
		if ( ! empty( $settings[ $metadata_field_name ] ) ) {
			$metadata[ $metadata_field_name ] = $settings[ $metadata_field_name ];
		}
		if ( ! empty( $metadata[ $metadata_field_name ] ) ) {
			$scripts = $metadata[ $metadata_field_name ];
			$processed_scripts = array();
			if ( is_array( $scripts ) ) {
				for ( $index = 0; $index < count( $scripts ); $index++ ) {
					$result = register_block_script_handle(
						$metadata,
						$metadata_field_name,
						$index
					);
					if ( $result ) {
						$processed_scripts[] = $result;
					}
				}
			} else {
				$result = register_block_script_handle(
					$metadata,
					$metadata_field_name
				);
				if ( $result ) {
					$processed_scripts[] = $result;
				}
			}
			$settings[ $settings_field_name ] = $processed_scripts;
		}
	}

$module_fields = array(
		'viewScriptModule' => 'view_script_module_ids',
	);
	foreach ( $module_fields as $metadata_field_name => $settings_field_name ) {
		if ( ! empty( $settings[ $metadata_field_name ] ) ) {
			$metadata[ $metadata_field_name ] = $settings[ $metadata_field_name ];
		}
		if ( ! empty( $metadata[ $metadata_field_name ] ) ) {
			$modules = $metadata[ $metadata_field_name ];
			$processed_modules = array();
			if ( is_array( $modules ) ) {
				for ( $index = 0; $index < count( $modules ); $index++ ) {
					$result = register_block_script_module_id(
						$metadata,
						$metadata_field_name,
						$index
					);
					if ( $result ) {
						$processed_modules[] = $result;
					}
				}
			} else {
				$result = register_block_script_module_id(
					$metadata,
					$metadata_field_name
				);
				if ( $result ) {
					$processed_modules[] = $result;
				}
			}
			$settings[ $settings_field_name ] = $processed_modules;
		}
	}

$style_fields = array(
		'editorStyle' => 'editor_style_handles',
		'style' => 'style_handles',
		'viewStyle' => 'view_style_handles',
	);
	foreach ( $style_fields as $metadata_field_name => $settings_field_name ) {
		if ( ! empty( $settings[ $metadata_field_name ] ) ) {
			$metadata[ $metadata_field_name ] = $settings[ $metadata_field_name ];
		}
		if ( ! empty( $metadata[ $metadata_field_name ] ) ) {
			$styles = $metadata[ $metadata_field_name ];
			$processed_styles = array();
			if ( is_array( $styles ) ) {
				for ( $index = 0; $index < count( $styles ); $index++ ) {
					$result = register_block_style_handle(
						$metadata,
						$metadata_field_name,
						$index
					);
					if ( $result ) {
						$processed_styles[] = $result;
					}
				}
			} else {
				$result = register_block_style_handle(
					$metadata,
					$metadata_field_name
				);
				if ( $result ) {
					$processed_styles[] = $result;
				}
			}
			$settings[ $settings_field_name ] = $processed_styles;
		}
	}

if ( ! empty( $metadata['blockHooks'] ) ) {
		/**
		 * Map camelCased position string (from block.json) to snake_cased block type position.
		 *
		 * @var array
		 */
		$position_mappings = array(
			'before'     => 'before',
			'after'      => 'after',
			'firstChild' => 'first_child',
			'lastChild'  => 'last_child',
		);

$settings['block_hooks'] = array();
		foreach ( $metadata['blockHooks'] as $anchor_block_name => $position ) {
			// Avoid infinite recursion (hooking to itself).
			if ( $metadata['name'] === $anchor_block_name ) {
				_doing_it_wrong(
					__METHOD__,
					__( 'Cannot hook block to itself.' ),
					'6.4.0'
				);
				continue;
			}

if ( ! isset( $position_mappings[ $position ] ) ) {
				continue;
			}

$settings['block_hooks'][ $anchor_block_name ] = $position_mappings[ $position ];
		}
	}

/**
	 * Filters the settings determined from the block type metadata.
	 *
	 * @since 5.7.0
	 *
	 * @param array $settings Array of determined settings for registering a block type.
	 * @param array $metadata Metadata provided for registering a block type.
	 */
	$settings = apply_filters( 'block_type_metadata_settings', $settings, $metadata );

$metadata['name'] = ! empty( $settings['name'] ) ? $settings['name'] : $metadata['name'];

return WP_Block_Type_Registry::get_instance()->register(
		$metadata['name'],
		$settings
	);
}

/**
 * Registers a block type. The recommended way is to register a block type using
 * the metadata stored in the `block.json` file.
 *
 * @since 5.0.0
 * @since 5.8.0 First parameter now accepts a path to the `block.json` file.
 *
 * @param string|WP_Block_Type $block_type Block type name including namespace, or alternatively
 *                                         a path to the JSON file with metadata definition for the block,
 *                                         or a path to the folder where the `block.json` file is located,
 *                                         or a complete WP_Block_Type instance.
 *                                         In case a WP_Block_Type is provided, the $args parameter will be ignored.
 * @param array                $args       Optional. Array of block type arguments. Accepts any public property
 *                                         of `WP_Block_Type`. See WP_Block_Type::__construct() for information
 *                                         on accepted arguments. Default empty array.
 *
 * @return WP_Block_Type|false The registered block type on success, or false on failure.
 */
function register_block_type( $block_type, $args = array() ) {
	if ( is_string( $block_type ) && file_exists( $block_type ) ) {
		return register_block_type_from_metadata( $block_type, $args );
	}

return WP_Block_Type_Registry::get_instance()->register( $block_type, $args );
}

/**
 * Unregisters a block type.
 *
 * @since 5.0.0
 *
 * @param string|WP_Block_Type $name Block type name including namespace, or alternatively
 *                                   a complete WP_Block_Type instance.
 * @return WP_Block_Type|false The unregistered block type on success, or false on failure.
 */
function unregister_block_type( $name ) {
	return WP_Block_Type_Registry::get_instance()->unregister( $name );
}

/**
 * Determines whether a post or content string has blocks.
 *
 * This test optimizes for performance rather than strict accuracy, detecting
 * the pattern of a block but not validating its structure. For strict accuracy,
 * you should use the block parser on post content.
 *
 * @since 5.0.0
 *
 * @see parse_blocks()
 *
 * @param int|string|WP_Post|null $post Optional. Post content, post ID, or post object.
 *                                      Defaults to global $post.
 * @return bool Whether the post has blocks.
 */
function has_blocks( $post = null ) {
	if ( ! is_string( $post ) ) {
		$wp_post = get_post( $post );

if ( ! $wp_post instanceof WP_Post ) {
			return false;
		}

$post = $wp_post->post_content;
	}

return str_contains( (string) $post, '<!-- wp:' );
}

/**
 * Determines whether a $post or a string contains a specific block type.
 *
 * This test optimizes for performance rather than strict accuracy, detecting
 * whether the block type exists but not validating its structure and not checking
 * synced patterns (formerly called reusable blocks). For strict accuracy,
 * you should use the block parser on post content.
 *
 * @since 5.0.0
 *
 * @see parse_blocks()
 *
 * @param string                  $block_name Full block type to look for.
 * @param int|string|WP_Post|null $post       Optional. Post content, post ID, or post object.
 *                                            Defaults to global $post.
 * @return bool Whether the post content contains the specified block.
 */
function has_block( $block_name, $post = null ) {
	if ( ! has_blocks( $post ) ) {
		return false;
	}

if ( ! is_string( $post ) ) {
		$wp_post = get_post( $post );
		if ( $wp_post instanceof WP_Post ) {
			$post = $wp_post->post_content;
		}
	}

/*
	 * Normalize block name to include namespace, if provided as non-namespaced.
	 * This matches behavior for WordPress 5.0.0 - 5.3.0 in matching blocks by
	 * their serialized names.
	 */
	if ( ! str_contains( $block_name, '/' ) ) {
		$block_name = 'core/' . $block_name;
	}

// Test for existence of block by its fully qualified name.
	$has_block = str_contains( $post, '<!-- wp:' . $block_name . ' ' );

if ( ! $has_block ) {
		/*
		 * If the given block name would serialize to a different name, test for
		 * existence by the serialized form.
		 */
		$serialized_block_name = strip_core_block_namespace( $block_name );
		if ( $serialized_block_name !== $block_name ) {
			$has_block = str_contains( $post, '<!-- wp:' . $serialized_block_name . ' ' );
		}
	}

return $has_block;
}

/**
 * Returns an array of the names of all registered dynamic block types.
 *
 * @since 5.0.0
 *
 * @return string[] Array of dynamic block names.
 */
function get_dynamic_block_names() {
	$dynamic_block_names = array();

$block_types = WP_Block_Type_Registry::get_instance()->get_all_registered();
	foreach ( $block_types as $block_type ) {
		if ( $block_type->is_dynamic() ) {
			$dynamic_block_names[] = $block_type->name;
		}
	}

return $dynamic_block_names;
}

/**
 * Retrieves block types hooked into the given block, grouped by anchor block type and the relative position.
 *
 * @since 6.4.0
 *
 * @return array[] Array of block types grouped by anchor block type and the relative position.
 */
function get_hooked_blocks() {
	$block_types   = WP_Block_Type_Registry::get_instance()->get_all_registered();
	$hooked_blocks = array();
	foreach ( $block_types as $block_type ) {
		if ( ! ( $block_type instanceof WP_Block_Type ) || ! is_array( $block_type->block_hooks ) ) {
			continue;
		}
		foreach ( $block_type->block_hooks as $anchor_block_type => $relative_position ) {
			if ( ! isset( $hooked_blocks[ $anchor_block_type ] ) ) {
				$hooked_blocks[ $anchor_block_type ] = array();
			}
			if ( ! isset( $hooked_blocks[ $anchor_block_type ][ $relative_position ] ) ) {
				$hooked_blocks[ $anchor_block_type ][ $relative_position ] = array();
			}
			$hooked_blocks[ $anchor_block_type ][ $relative_position ][] = $block_type->name;
		}
	}

return $hooked_blocks;
}

/**
 * Returns the markup for blocks hooked to the given anchor block in a specific relative position.
 *
 * @since 6.5.0
 * @access private
 *
 * @param array                           $parsed_anchor_block The anchor block, in parsed block array format.
 * @param string                          $relative_position   The relative position of the hooked blocks.
 *                                                             Can be one of 'before', 'after', 'first_child', or 'last_child'.
 * @param array                           $hooked_blocks       An array of hooked block types, grouped by anchor block and relative position.
 * @param WP_Block_Template|WP_Post|array $context             The block template, template part, or pattern that the anchor block belongs to.
 * @return string
 */
function insert_hooked_blocks( &$parsed_anchor_block, $relative_position, $hooked_blocks, $context ) {
	$anchor_block_type  = $parsed_anchor_block['blockName'];
	$hooked_block_types = isset( $anchor_block_type, $hooked_blocks[ $anchor_block_type ][ $relative_position ] )
		? $hooked_blocks[ $anchor_block_type ][ $relative_position ]
		: array();

/**
	 * Filters the list of hooked block types for a given anchor block type and relative position.
	 *
	 * @since 6.4.0
	 *
	 * @param string[]                        $hooked_block_types The list of hooked block types.
	 * @param string                          $relative_position  The relative position of the hooked blocks.
	 *                                                            Can be one of 'before', 'after', 'first_child', or 'last_child'.
	 * @param string                          $anchor_block_type  The anchor block type.
	 * @param WP_Block_Template|WP_Post|array $context            The block template, template part, post object,
	 *                                                            or pattern that the anchor block belongs to.
	 */
	$hooked_block_types = apply_filters( 'hooked_block_types', $hooked_block_types, $relative_position, $anchor_block_type, $context );

$markup = '';
	foreach ( $hooked_block_types as $hooked_block_type ) {
		$parsed_hooked_block = array(
			'blockName'    => $hooked_block_type,
			'attrs'        => array(),
			'innerBlocks'  => array(),
			'innerHTML'    => '',
			'innerContent' => array(),
		);

/**
		 * Filters the parsed block array for a given hooked block.
		 *
		 * @since 6.5.0
		 *
		 * @param array|null                      $parsed_hooked_block The parsed block array for the given hooked block type, or null to suppress the block.
		 * @param string                          $hooked_block_type   The hooked block type name.
		 * @param string                          $relative_position   The relative position of the hooked block.
		 * @param array                           $parsed_anchor_block The anchor block, in parsed block array format.
		 * @param WP_Block_Template|WP_Post|array $context             The block template, template part, post object,
		 *                                                             or pattern that the anchor block belongs to.
		 */
		$parsed_hooked_block = apply_filters( 'hooked_block', $parsed_hooked_block, $hooked_block_type, $relative_position, $parsed_anchor_block, $context );

/**
		 * Filters the parsed block array for a given hooked block.
		 *
		 * The dynamic portion of the hook name, `$hooked_block_type`, refers to the block type name of the specific hooked block.
		 *
		 * @since 6.5.0
		 *
		 * @param array|null                      $parsed_hooked_block The parsed block array for the given hooked block type, or null to suppress the block.
		 * @param string                          $hooked_block_type   The hooked block type name.
		 * @param string                          $relative_position   The relative position of the hooked block.
		 * @param array                           $parsed_anchor_block The anchor block, in parsed block array format.
		 * @param WP_Block_Template|WP_Post|array $context             The block template, template part, post object,
		 *                                                             or pattern that the anchor block belongs to.
		 */
		$parsed_hooked_block = apply_filters( "hooked_block_{$hooked_block_type}", $parsed_hooked_block, $hooked_block_type, $relative_position, $parsed_anchor_block, $context );

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

// It's possible that the filter returned a block of a different type, so we explicitly
		// look for the original `$hooked_block_type` in the `ignoredHookedBlocks` metadata.
		if (
			! isset( $parsed_anchor_block['attrs']['metadata']['ignoredHookedBlocks'] ) ||
			! in_array( $hooked_block_type, $parsed_anchor_block['attrs']['metadata']['ignoredHookedBlocks'], true )
		) {
			$markup .= serialize_block( $parsed_hooked_block );
		}
	}

return $markup;
}

/**
 * Adds a list of hooked block types to an anchor block's ignored hooked block types.
 *
 * This function is meant for internal use only.
 *
 * @since 6.5.0
 * @access private
 *
 * @param array                           $parsed_anchor_block The anchor block, in parsed block array format.
 * @param string                          $relative_position   The relative position of the hooked blocks.
 *                                                             Can be one of 'before', 'after', 'first_child', or 'last_child'.
 * @param array                           $hooked_blocks       An array of hooked block types, grouped by anchor block and relative position.
 * @param WP_Block_Template|WP_Post|array $context             The block template, template part, or pattern that the anchor block belongs to.
 * @return string Empty string.
 */
function set_ignored_hooked_blocks_metadata( &$parsed_anchor_block, $relative_position, $hooked_blocks, $context ) {
	$anchor_block_type  = $parsed_anchor_block['blockName'];
	$hooked_block_types = isset( $anchor_block_type, $hooked_blocks[ $anchor_block_type ][ $relative_position ] )
		? $hooked_blocks[ $anchor_block_type ][ $relative_position ]
		: array();

/** This filter is documented in wp-includes/blocks.php */
	$hooked_block_types = apply_filters( 'hooked_block_types', $hooked_block_types, $relative_position, $anchor_block_type, $context );
	if ( empty( $hooked_block_types ) ) {
		return '';
	}

foreach ( $hooked_block_types as $index => $hooked_block_type ) {
		$parsed_hooked_block = array(
			'blockName'    => $hooked_block_type,
			'attrs'        => array(),
			'innerBlocks'  => array(),
			'innerContent' => array(),
		);

/** This filter is documented in wp-includes/blocks.php */
		$parsed_hooked_block = apply_filters( 'hooked_block', $parsed_hooked_block, $hooked_block_type, $relative_position, $parsed_anchor_block, $context );

/** This filter is documented in wp-includes/blocks.php */
		$parsed_hooked_block = apply_filters( "hooked_block_{$hooked_block_type}", $parsed_hooked_block, $hooked_block_type, $relative_position, $parsed_anchor_block, $context );

if ( null === $parsed_hooked_block ) {
			unset( $hooked_block_types[ $index ] );
		}
	}

$previously_ignored_hooked_blocks = $parsed_anchor_block['attrs']['metadata']['ignoredHookedBlocks'] ?? array();

$parsed_anchor_block['attrs']['metadata']['ignoredHookedBlocks'] = array_unique(
		array_merge(
			$previously_ignored_hooked_blocks,
			$hooked_block_types
		)
	);

// Markup for the hooked blocks has already been created (in `insert_hooked_blocks`).
	return '';
}

/**
 * Runs the hooked blocks algorithm on the given content.
 *
 * @since 6.6.0
 * @since 6.7.0 Injects the `theme` attribute into Template Part blocks, even if no hooked blocks are registered.
 * @since 6.8.0 Have the `$context` parameter default to `null`, in which case `get_post()` will be called to use the current post as context.
 * @access private
 *
 * @param string                               $content  Serialized content.
 * @param WP_Block_Template|WP_Post|array|null $context  A block template, template part, post object, or pattern
 *                                                       that the blocks belong to. If set to `null`, `get_post()`
 *                                                       will be called to use the current post as context.
 *                                                       Default: `null`.
 * @param callable                             $callback A function that will be called for each block to generate
 *                                                       the markup for a given list of blocks that are hooked to it.
 *                                                       Default: 'insert_hooked_blocks'.
 * @return string The serialized markup.
 */
function apply_block_hooks_to_content( $content, $context = null, $callback = 'insert_hooked_blocks' ) {
	// Default to the current post if no context is provided.
	if ( null === $context ) {
		$context = get_post();
	}

$hooked_blocks = get_hooked_blocks();

$before_block_visitor = '_inject_theme_attribute_in_template_part_block';
	$after_block_visitor  = null;
	if ( ! empty( $hooked_blocks ) || has_filter( 'hooked_block_types' ) ) {
		$before_block_visitor = make_before_block_visitor( $hooked_blocks, $context, $callback );
		$after_block_visitor  = make_after_block_visitor( $hooked_blocks, $context, $callback );
	}

$block_allows_multiple_instances = array();
	/*
	 * Remove hooked blocks from `$hooked_block_types` if they have `multiple` set to false and
	 * are already present in `$content`.
	 */
	foreach ( $hooked_blocks as $anchor_block_type => $relative_positions ) {
		foreach ( $relative_positions as $relative_position => $hooked_block_types ) {
			foreach ( $hooked_block_types as $index => $hooked_block_type ) {
				$hooked_block_type_definition =
					WP_Block_Type_Registry::get_instance()->get_registered( $hooked_block_type );

$block_allows_multiple_instances[ $hooked_block_type ] =
					block_has_support( $hooked_block_type_definition, 'multiple', true );

if (
					! $block_allows_multiple_instances[ $hooked_block_type ] &&
					has_block( $hooked_block_type, $content )
				) {
					unset( $hooked_blocks[ $anchor_block_type ][ $relative_position ][ $index ] );
				}
			}
			if ( empty( $hooked_blocks[ $anchor_block_type ][ $relative_position ] ) ) {
				unset( $hooked_blocks[ $anchor_block_type ][ $relative_position ] );
			}
		}
		if ( empty( $hooked_blocks[ $anchor_block_type ] ) ) {
			unset( $hooked_blocks[ $anchor_block_type ] );
		}
	}

/*
	 * We also need to cover the case where the hooked block is not present in
	 * `$content` at first and we're allowed to insert it once -- but not again.
	 */
	$suppress_single_instance_blocks = static function ( $hooked_block_types ) use ( &$block_allows_multiple_instances, $content ) {
		static $single_instance_blocks_present_in_content = array();
		foreach ( $hooked_block_types as $index => $hooked_block_type ) {
			if ( ! isset( $block_allows_multiple_instances[ $hooked_block_type ] ) ) {
				$hooked_block_type_definition =
					WP_Block_Type_Registry::get_instance()->get_registered( $hooked_block_type );

$block_allows_multiple_instances[ $hooked_block_type ] =
					block_has_support( $hooked_block_type_definition, 'multiple', true );
			}

if ( $block_allows_multiple_instances[ $hooked_block_type ] ) {
				continue;
			}

// The block doesn't allow multiple instances, so we need to check if it's already present.
			if (
				in_array( $hooked_block_type, $single_instance_blocks_present_in_content, true ) ||
				has_block( $hooked_block_type, $content )
			) {
				unset( $hooked_block_types[ $index ] );
			} else {
				// We can insert the block once, but need to remember not to insert it again.
				$single_instance_blocks_present_in_content[] = $hooked_block_type;
			}
		}
		return $hooked_block_types;
	};
	add_filter( 'hooked_block_types', $suppress_single_instance_blocks, PHP_INT_MAX );
	$content = traverse_and_serialize_blocks(
		parse_blocks( $content ),
		$before_block_visitor,
		$after_block_visitor
	);
	remove_filter( 'hooked_block_types', $suppress_single_instance_blocks, PHP_INT_MAX );

return $content;
}

/**
 * Run the Block Hooks algorithm on a post object's content.
 *
 * This function is different from `apply_block_hooks_to_content` in that
 * it takes ignored hooked block information from the post's metadata into
 * account. This ensures that any blocks hooked as first or last child
 * of the block that corresponds to the post type are handled correctly.
 *
 * @since 6.8.0
 * @since 7.0.0 Added the `$ignored_hooked_blocks_at_root` parameter.
 * @access private
 *
 * @param string       $content  Serialized content.
 * @param WP_Post|null $post     A post object that the content belongs to. If set to `null`,
 *                               `get_post()` will be called to use the current post as context.
 *                               Default: `null`.
 * @param callable     $callback A function that will be called for each block to generate
 *                               the markup for a given list of blocks that are hooked to it.
 *                               Default: 'insert_hooked_blocks'.
 * @param array|null   $ignored_hooked_blocks_at_root A reference to an array that will be populated
 *                               with the ignored hooked blocks at the root level.
 *                               Default: `null`.
 * @return string The serialized markup.
 */
function apply_block_hooks_to_content_from_post_object(
	$content,
	$post = null,
	$callback = 'insert_hooked_blocks',
	&$ignored_hooked_blocks_at_root = null
) {
	// Default to the current post if no context is provided.
	if ( null === $post ) {
		$post = get_post();
	}

if ( ! $post instanceof WP_Post ) {
		return apply_block_hooks_to_content( $content, $post, $callback );
	}

/*
	 * If the content was created using the classic editor or using a single Classic block
	 * (`core/freeform`), it might not contain any block markup at all.
	 * However, we still might need to inject hooked blocks in the first child or last child
	 * positions of the parent block. To be able to apply the Block Hooks algorithm, we wrap
	 * the content in a `core/freeform` wrapper block.
	 */
	if ( ! has_blocks( $content ) ) {
		$original_content = $content;

$content_wrapped_in_classic_block = get_comment_delimited_block_content(
			'core/freeform',
			array(),
			$content
		);

$content = $content_wrapped_in_classic_block;
	}

$attributes = array();

// If context is a post object, `ignoredHookedBlocks` information is stored in its post meta.
	$ignored_hooked_blocks = get_post_meta( $post->ID, '_wp_ignored_hooked_blocks', true );
	if ( ! empty( $ignored_hooked_blocks ) ) {
		$ignored_hooked_blocks  = json_decode( $ignored_hooked_blocks, true );
		$attributes['metadata'] = array(
			'ignoredHookedBlocks' => $ignored_hooked_blocks,
		);
	}

/*
	 * We need to wrap the content in a temporary wrapper block with that metadata
	 * so the Block Hooks algorithm can insert blocks that are hooked as first or last child
	 * of the wrapper block.
	 * To that end, we need to determine the wrapper block type based on the post type.
	 */
	if ( 'wp_navigation' === $post->post_type ) {
		$wrapper_block_type = 'core/navigation';
	} elseif ( 'wp_block' === $post->post_type ) {
		$wrapper_block_type = 'core/block';
	} else {
		$wrapper_block_type = 'core/post-content';
	}

$content = get_comment_delimited_block_content(
		$wrapper_block_type,
		$attributes,
		$content
	);

/*
	 * We need to avoid inserting any blocks hooked into the `before` and `after` positions
	 * of the temporary wrapper block that we create to wrap the content.
	 * See https://core.trac.wordpress.org/ticket/63287 for more details.
	 */
	$suppress_blocks_from_insertion_before_and_after_wrapper_block = static function ( $hooked_block_types, $relative_position, $anchor_block_type ) use ( $wrapper_block_type ) {
		if (
			$wrapper_block_type === $anchor_block_type &&
			in_array( $relative_position, array( 'before', 'after' ), true )
		) {
			return array();
		}
		return $hooked_block_types;
	};

// Apply Block Hooks.
	add_filter( 'hooked_block_types', $suppress_blocks_from_insertion_before_and_after_wrapper_block, PHP_INT_MAX, 3 );
	$content = apply_block_hooks_to_content( $content, $post, $callback );
	remove_filter( 'hooked_block_types', $suppress_blocks_from_insertion_before_and_after_wrapper_block, PHP_INT_MAX );

if ( null !== $ignored_hooked_blocks_at_root ) {
		// Check wrapper block's metadata for ignored hooked blocks at the root level, and populate the reference parameter if needed.
		$wrapper_block_markup = extract_serialized_parent_block( $content );
		$wrapper_block        = parse_blocks( $wrapper_block_markup )[0];

if ( ! empty( $wrapper_block['attrs']['metadata']['ignoredHookedBlocks'] ) ) {
			$ignored_hooked_blocks_at_root = $wrapper_block['attrs']['metadata']['ignoredHookedBlocks'];
		}
	}

// Finally, we need to remove the temporary wrapper block.
	$content = remove_serialized_parent_block( $content );

// If we wrapped the content in a `core/freeform` block, we also need to remove that.
	if ( ! empty( $content_wrapped_in_classic_block ) ) {
		/*
		 * We cannot simply use remove_serialized_parent_block() here,
		 * as that function assumes that the block wrapper is at the top level.
		 * However, there might now be a hooked block inserted next to it
		 * (as first or last child of the parent).
		 */
		$content = str_replace( $content_wrapped_in_classic_block, $original_content, $content );
	}

return $content;
}

/**
 * Accepts the serialized markup of a block and its inner blocks, and returns serialized markup of the inner blocks.
 *
 * @since 6.6.0
 * @access private
 *
 * @param string $serialized_block The serialized markup of a block and its inner blocks.
 * @return string The serialized markup of the inner blocks.
 */
function remove_serialized_parent_block( $serialized_block ) {
	$start = strpos( $serialized_block, '-->' ) + strlen( '-->' );
	$end = strrpos( $serialized_block, '<!--' );
	return substr( $serialized_block, $start, $end - $start );
}

/**
 * Accepts the serialized markup of a block and its inner blocks, and returns serialized markup of the wrapper block.
 *
 * @since 6.7.0
 * @access private
 *
 * @see remove_serialized_parent_block()
 *
 * @param string $serialized_block The serialized markup of a block and its inner blocks.
 * @return string The serialized markup of the wrapper block.
 */
function extract_serialized_parent_block( $serialized_block ) {
	$start = strpos( $serialized_block, '-->' ) + strlen( '-->' );
	$end = strrpos( $serialized_block, '<!--' );
	return substr( $serialized_block, 0, $start ) . substr( $serialized_block, $end );
}

/**
 * Updates the wp_postmeta with the list of ignored hooked blocks
 * where the inner blocks are stored as post content.
 *
 * @since 6.6.0
 * @since 6.8.0 Support non-`wp_navigation` post types.
 * @access private
 *
 * @param stdClass $post Post object.
 * @return stdClass The updated post object.
 */
function update_ignored_hooked_blocks_postmeta( $post ) {
	/*
	 * In this scenario the user has likely tried to create a new post object via the REST API.
	 * In which case we won't have a post ID to work with and store meta against.
	 */
	if ( empty( $post->ID ) ) {
		return $post;
	}

/*
	 * Skip meta generation when consumers intentionally update specific fields
	 * and omit the content update.
	 */
	if ( ! isset( $post->post_content ) ) {
		return $post;
	}

/*
	 * Skip meta generation if post type is not set.
	 */
	if ( ! isset( $post->post_type ) ) {
		return $post;
	}

$attributes = array();

$ignored_hooked_blocks = get_post_meta( $post->ID, '_wp_ignored_hooked_blocks', true );
	if ( ! empty( $ignored_hooked_blocks ) ) {
		$ignored_hooked_blocks  = json_decode( $ignored_hooked_blocks, true );
		$attributes['metadata'] = array(
			'ignoredHookedBlocks' => $ignored_hooked_blocks,
		);
	}

if ( 'wp_navigation' === $post->post_type ) {
		$wrapper_block_type = 'core/navigation';
	} elseif ( 'wp_block' === $post->post_type ) {
		$wrapper_block_type = 'core/block';
	} else {
		$wrapper_block_type = 'core/post-content';
	}

$markup = get_comment_delimited_block_content(
		$wrapper_block_type,
		$attributes,
		$post->post_content
	);

$existing_post = get_post( $post->ID );
	// Merge the existing post object with the updated post object to pass to the block hooks algorithm for context.
	$context          = (object) array_merge( (array) $existing_post, (array) $post );
	$context          = new WP_Post( $context ); // Convert to WP_Post object.
	$serialized_block = apply_block_hooks_to_content( $markup, $context, 'set_ignored_hooked_blocks_metadata' );
	$root_block       = parse_blocks( $serialized_block )[0];

$ignored_hooked_blocks = $root_block['attrs']['metadata']['ignoredHookedBlocks'] ?? array();

if ( ! empty( $ignored_hooked_blocks ) ) {
		$existing_ignored_hooked_blocks = get_post_meta( $post->ID, '_wp_ignored_hooked_blocks', true );
		if ( ! empty( $existing_ignored_hooked_blocks ) ) {
			$existing_ignored_hooked_blocks = json_decode( $existing_ignored_hooked_blocks, true );
			$ignored_hooked_blocks          = array_unique( array_merge( $ignored_hooked_blocks, $existing_ignored_hooked_blocks ) );
		}

if ( ! isset( $post->meta_input ) ) {
			$post->meta_input = array();
		}
		$post->meta_input['_wp_ignored_hooked_blocks'] = json_encode( $ignored_hooked_blocks );
	}

$post->post_content = remove_serialized_parent_block( $serialized_block );
	return $post;
}

/**
 * Returns the markup for blocks hooked to the given anchor block in a specific relative position and then
 * adds a list of hooked block types to an anchor block's ignored hooked block types.
 *
 * This function is meant for internal use only.
 *
 * @since 6.6.0
 * @access private
 *
 * @param array                           $parsed_anchor_block The anchor block, in parsed block array format.
 * @param string                          $relative_position   The relative position of the hooked blocks.
 *                                                             Can be one of 'before', 'after', 'first_child', or 'last_child'.
 * @param array                           $hooked_blocks       An array of hooked block types, grouped by anchor block and relative position.
 * @param WP_Block_Template|WP_Post|array $context             The block template, template part, or pattern that the anchor block belongs to.
 * @return string
 */
function insert_hooked_blocks_and_set_ignored_hooked_blocks_metadata( &$parsed_anchor_block, $relative_position, $hooked_blocks, $context ) {
	$markup  = insert_hooked_blocks( $parsed_anchor_block, $relative_position, $hooked_blocks, $context );
	$markup .= set_ignored_hooked_blocks_metadata( $parsed_anchor_block, $relative_position, $hooked_blocks, $context );

return $markup;
}

/**
 * Hooks into the REST API response for the Posts endpoint and adds the first and last inner blocks.
 *
 * @since 6.6.0
 * @since 6.8.0 Support non-`wp_navigation` post types.
 * @since 7.0.0 Set `_wp_ignored_hooked_blocks` meta in the response for blocks hooked at the root level.
 *
 * @param WP_REST_Response $response The response object.
 * @param WP_Post          $post     Post object.
 * @return WP_REST_Response The response object.
 */
function insert_hooked_blocks_into_rest_response( $response, $post ) {
	if ( empty( $response->data['content']['raw'] ) ) {
		return $response;
	}

$ignored_hooked_blocks_at_root    = array();
	$response->data['content']['raw'] = apply_block_hooks_to_content_from_post_object(
		$response->data['content']['raw'],
		$post,
		'insert_hooked_blocks_and_set_ignored_hooked_blocks_metadata',
		$ignored_hooked_blocks_at_root
	);

if ( ! empty( $ignored_hooked_blocks_at_root ) ) {
		$response->data['meta']['_wp_ignored_hooked_blocks'] = wp_json_encode( $ignored_hooked_blocks_at_root );
	}

// If the rendered content was previously empty, we leave it like that.
	if ( empty( $response->data['content']['rendered'] ) ) {
		return $response;
	}

// `apply_block_hooks_to_content` is called above. Ensure it is not called again as a filter.
	$priority = has_filter( 'the_content', 'apply_block_hooks_to_content_from_post_object' );
	if ( false !== $priority ) {
		remove_filter( 'the_content', 'apply_block_hooks_to_content_from_post_object', $priority );
	}

/** This filter is documented in wp-includes/post-template.php */
	$response->data['content']['rendered'] = apply_filters(
		'the_content',
		$response->data['content']['raw']
	);

// Restore the filter if it was set initially.
	if ( false !== $priority ) {
		add_filter( 'the_content', 'apply_block_hooks_to_content_from_post_object', $priority );
	}

return $response;
}

/**
 * Returns a function that injects the theme attribute into, and hooked blocks before, a given block.
 *
 * The returned function can be used as `$pre_callback` argument to `traverse_and_serialize_block(s)`,
 * where it will inject the `theme` attribute into all Template Part blocks, and prepend the markup for
 * any blocks hooked `before` the given block and as its parent's `first_child`, respectively.
 *
 * This function is meant for internal use only.
 *
 * @since 6.4.0
 * @since 6.5.0 Added $callback argument.
 * @access private
 *
 * @param array                           $hooked_blocks An array of blocks hooked to another given block.
 * @param WP_Block_Template|WP_Post|array $context       A block template, template part, post object,
 *                                                       or pattern that the blocks belong to.
 * @param callable                        $callback      A function that will be called for each block to generate
 *                                                       the markup for a given list of blocks that are hooked to it.
 *                                                       Default: 'insert_hooked_blocks'.
 * @return callable A function that returns the serialized markup for the given block,
 *                  including the markup for any hooked blocks before it.
 */
function make_before_block_visitor( $hooked_blocks, $context, $callback = 'insert_hooked_blocks' ) {
	/**
	 * Injects hooked blocks before the given block, injects the `theme` attribute into Template Part blocks, and returns the serialized markup.
	 *
	 * If the current block is a Template Part block, inject the `theme` attribute.
	 * Furthermore, prepend the markup for any blocks hooked `before` the given block and as its parent's
	 * `first_child`, respectively, to the serialized markup for the given block.
	 *
	 * @param array $block        The block to inject the theme attribute into, and hooked blocks before. Passed by reference.
	 * @param array $parent_block The parent block of the given block. Passed by reference. Default null.
	 * @param array $prev         The previous sibling block of the given block. Default null.
	 * @return string The serialized markup for the given block, with the markup for any hooked blocks prepended to it.
	 */
	return function ( &$block, &$parent_block = null, $prev = null ) use ( $hooked_blocks, $context, $callback ) {
		_inject_theme_attribute_in_template_part_block( $block );

$markup = '';

if ( $parent_block && ! $prev ) {
			// Candidate for first-child insertion.
			$markup .= call_user_func_array(
				$callback,
				array( &$parent_block, 'first_child', $hooked_blocks, $context )
			);
		}

$markup .= call_user_func_array(
			$callback,
			array( &$block, 'before', $hooked_blocks, $context )
		);

return $markup;
	};
}

/**
 * Returns a function that injects the hooked blocks after a given block.
 *
 * The returned function can be used as `$post_callback` argument to `traverse_and_serialize_block(s)`,
 * where it will append the markup for any blocks hooked `after` the given block and as its parent's
 * `last_child`, respectively.
 *
 * This function is meant for internal use only.
 *
 * @since 6.4.0
 * @since 6.5.0 Added $callback argument.
 * @access private
 *
 * @param array                           $hooked_blocks An array of blocks hooked to another block.
 * @param WP_Block_Template|WP_Post|array $context       A block template, template part, post object,
 *                                                       or pattern that the blocks belong to.
 * @param callable                        $callback      A function that will be called for each block to generate
 *                                                       the markup for a given list of blocks that are hooked to it.
 *                                                       Default: 'insert_hooked_blocks'.
 * @return callable A function that returns the serialized markup for the given block,
 *                  including the markup for any hooked blocks after it.
 */
function make_after_block_visitor( $hooked_blocks, $context, $callback = 'insert_hooked_blocks' ) {
	/**
	 * Injects hooked blocks after the given block, and returns the serialized markup.
	 *
	 * Append the markup for any blocks hooked `after` the given block and as its parent's
	 * `last_child`, respectively, to the serialized markup for the given block.
	 *
	 * @param array $block        The block to inject the hooked blocks after. Passed by reference.
	 * @param array $parent_block The parent block of the given block. Passed by reference. Default null.
	 * @param array $next         The next sibling block of the given block. Default null.
	 * @return string The serialized markup for the given block, with the markup for any hooked blocks appended to it.
	 */
	return function ( &$block, &$parent_block = null, $next = null ) use ( $hooked_blocks, $context, $callback ) {
		$markup = call_user_func_array(
			$callback,
			array( &$block, 'after', $hooked_blocks, $context )
		);

if ( $parent_block && ! $next ) {
			// Candidate for last-child insertion.
			$markup .= call_user_func_array(
				$callback,
				array( &$parent_block, 'last_child', $hooked_blocks, $context )
			);
		}

return $markup;
	};
}

/**
 * Given an array of attributes, returns a string in the serialized attributes
 * format prepared for post content.
 *
 * The serialized result is a JSON-encoded string, with unicode escape sequence
 * substitution for characters which might otherwise interfere with embedding
 * the result in an HTML comment.
 *
 * This function must produce output that remains in sync with the output of
 * the serializeAttributes JavaScript function in the block editor in order
 * to ensure consistent operation between PHP and JavaScript.
 *
 * @since 5.3.1
 *
 * @param array $block_attributes Attributes object.
 * @return string Serialized attributes.
 */
function serialize_block_attributes( $block_attributes ) {
	$encoded_attributes = wp_json_encode( $block_attributes, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE );

return strtr(
		$encoded_attributes,
		array(
			'\\\\' => '\\u005c',
			'--' => '\\u002d\\u002d',
			'<' => '\\u003c',
			'>' => '\\u003e',
			'&' => '\\u0026',
			'\\"' => '\\u0022',
		)
	);
}

/**
 * Returns the block name to use for serialization. This will remove the default
 * "core/" namespace from a block name.
 *
 * @since 5.3.1
 *
 * @param string|null $block_name Optional. Original block name. Null if the block name is unknown,
 *                                e.g. Classic blocks have their name set to null. Default null.
 * @return string Block name to use for serialization.
 */
function strip_core_block_namespace( $block_name = null ) {
	if ( is_string( $block_name ) && str_starts_with( $block_name, 'core/' ) ) {
		return substr( $block_name, 5 );
	}

return $block_name;
}

/**
 * Returns the content of a block, including comment delimiters.
 *
 * @since 5.3.1
 *
 * @param string|null $block_name       Block name. Null if the block name is unknown,
 *                                      e.g. Classic blocks have their name set to null.
 * @param array       $block_attributes Block attributes.
 * @param string      $block_content    Block save content.
 * @return string Comment-delimited block content.
 */
function get_comment_delimited_block_content( $block_name, $block_attributes, $block_content ) {
	if ( is_null( $block_name ) ) {
		return $block_content;
	}

$serialized_block_name = strip_core_block_namespace( $block_name );
	$serialized_attributes = empty( $block_attributes ) ? '' : serialize_block_attributes( $block_attributes ) . ' ';

if ( empty( $block_content ) ) {
		return sprintf( '', $serialized_block_name, $serialized_attributes );
	}

return sprintf(
		'%s',
		$serialized_block_name,
		$serialized_attributes,
		$block_content,
		$serialized_block_name
	);
}

/**
 * Returns the content of a block, including comment delimiters, serializing all
 * attributes from the given parsed block.
 *
 * This should be used when preparing a block to be saved to post content.
 * Prefer `render_block` when preparing a block for display. Unlike
 * `render_block`, this does not evaluate a block's `render_callback`, and will
 * instead preserve the markup as parsed.
 *
 * @since 5.3.1
 *
 * @param array $block {
 *     An associative array of a single parsed block object. See WP_Block_Parser_Block.
 *
 *     @type string|null $blockName    Name of block.
 *     @type array       $attrs        Attributes from block comment delimiters.
 *     @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
 *                                     have the same structure as this one.
 *     @type string      $innerHTML    HTML from inside block comment delimiters.
 *     @type array       $innerContent List of string fragments and null markers where
 *                                     inner blocks were found.
 * }
 * @return string String of rendered HTML.
 */
function serialize_block( $block ) {
	$block_content = '';

$index = 0;
	foreach ( $block['innerContent'] as $chunk ) {
		$block_content .= is_string( $chunk ) ? $chunk : serialize_block( $block['innerBlocks'][ $index++ ] );
	}

if ( ! is_array( $block['attrs'] ) ) {
		$block['attrs'] = array();
	}

return get_comment_delimited_block_content(
		$block['blockName'],
		$block['attrs'],
		$block_content
	);
}

/**
 * Returns a joined string of the aggregate serialization of the given
 * parsed blocks.
 *
 * @since 5.3.1
 *
 * @param array[] $blocks {
 *     Array of block structures.
 *
 *     @type array ...$0 {
 *         An associative array of a single parsed block object. See WP_Block_Parser_Block.
 *
 *         @type string|null $blockName    Name of block.
 *         @type array       $attrs        Attributes from block comment delimiters.
 *         @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
 *                                         have the same structure as this one.
 *         @type string      $innerHTML    HTML from inside block comment delimiters.
 *         @type array       $innerContent List of string fragments and null markers where
 *                                         inner blocks were found.
 *     }
 * }
 * @return string String of rendered HTML.
 */
function serialize_blocks( $blocks ) {
	return implode( '', array_map( 'serialize_block', $blocks ) );
}

/**
 * Traverses a parsed block tree and applies callbacks before and after serializing it.
 *
 * Recursively traverses the block and its inner blocks and applies the two callbacks provided as
 * arguments, the first one before serializing the block, and the second one after serializing it.
 * If either callback returns a string value, it will be prepended and appended to the serialized
 * block markup, respectively.
 *
 * The callbacks will receive a reference to the current block as their first argument, so that they
 * can also modify it, and the current block's parent block as second argument. Finally, the
 * `$pre_callback` receives the previous block, whereas the `$post_callback` receives
 * the next block as third argument.
 *
 * Serialized blocks are returned including comment delimiters, and with all attributes serialized.
 *
 * This function should be used when there is a need to modify the saved block, or to inject markup
 * into the return value. Prefer `serialize_block` when preparing a block to be saved to post content.
 *
 * This function is meant for internal use only.
 *
 * @since 6.4.0
 * @access private
 *
 * @see serialize_block()
 *
 * @param array    $block         An associative array of a single parsed block object. See WP_Block_Parser_Block.
 * @param callable $pre_callback  Callback to run on each block in the tree before it is traversed and serialized.
 *                                It is called with the following arguments: &$block, $parent_block, $previous_block.
 *                                Its string return value will be prepended to the serialized block markup.
 * @param callable $post_callback Callback to run on each block in the tree after it is traversed and serialized.
 *                                It is called with the following arguments: &$block, $parent_block, $next_block.
 *                                Its string return value will be appended to the serialized block markup.
 * @return string Serialized block markup.
 */
function traverse_and_serialize_block( $block, $pre_callback = null, $post_callback = null ) {
	$block_content = '';
	$block_index   = 0;

foreach ( $block['innerContent'] as $chunk ) {
		if ( is_string( $chunk ) ) {
			$block_content .= $chunk;
		} else {
			$inner_block = $block['innerBlocks'][ $block_index ];

if ( is_callable( $pre_callback ) ) {
				$prev = 0 === $block_index
					? null
					: $block['innerBlocks'][ $block_index - 1 ];

$block_content .= call_user_func_array(
					$pre_callback,
					array( &$inner_block, &$block, $prev )
				);
			}

if ( is_callable( $post_callback ) ) {
				$next = count( $block['innerBlocks'] ) - 1 === $block_index
					? null
					: $block['innerBlocks'][ $block_index + 1 ];

$post_markup = call_user_func_array(
					$post_callback,
					array( &$inner_block, &$block, $next )
				);
			}

$block_content .= traverse_and_serialize_block( $inner_block, $pre_callback, $post_callback );
			$block_content .= $post_markup ?? '';

++$block_index;
		}
	}

if ( ! is_array( $block['attrs'] ) ) {
		$block['attrs'] = array();
	}

return get_comment_delimited_block_content(
		$block['blockName'],
		$block['attrs'],
		$block_content
	);
}

/**
 * Replaces patterns in a block tree with their content.
 *
 * @since 6.6.0
 * @since 7.0.0 Adds metadata to attributes of single-pattern container blocks.
 *
 * @param array $blocks An array blocks.
 *
 * @return array An array of blocks with patterns replaced by their content.
 */
function resolve_pattern_blocks( $blocks ) {
	static $inner_content;
	// Keep track of seen references to avoid infinite loops.
	static $seen_refs = array();
	$i = 0;
	while ( $i < count( $blocks ) ) {
		if ( 'core/pattern' === $blocks[ $i ]['blockName'] ) {
			$attrs = $blocks[ $i ]['attrs'];

if ( empty( $attrs['slug'] ) ) {
				++$i;
				continue;
			}

$slug = $attrs['slug'];

if ( isset( $seen_refs[ $slug ] ) ) {
				// Skip recursive patterns.
				array_splice( $blocks, $i, 1 );
				continue;
			}

$registry = WP_Block_Patterns_Registry::get_instance();
			$pattern  = $registry->get_registered( $slug );

// Skip unknown patterns.
			if ( ! $pattern ) {
				++$i;
				continue;
			}

$blocks_to_insert = parse_blocks( trim( $pattern['content'] ) );

/*
			 * For single-root patterns, add the pattern name to make this a pattern instance in the editor.
			 * If the pattern has metadata, merge it with the existing metadata.
			 */
			if ( count( $blocks_to_insert ) === 1 ) {
				$block_metadata                = $blocks_to_insert[0]['attrs']['metadata'] ?? array();
				$block_metadata['patternName'] = $slug;

/*
				 * Merge pattern metadata with existing block metadata.
				 * Pattern metadata takes precedence, but existing block metadata
				 * is preserved as a fallback when the pattern doesn't define that field.
				 * Only the defined fields (name, description, categories) are updated;
				 * other metadata keys are preserved.
				 */
				foreach ( array(
					'name'        => 'title', // 'title' is the field in the pattern object 'name' is the field in the block metadata.
					'description' => 'description',
					'categories'  => 'categories',
				) as $key => $pattern_key ) {
					$value = $pattern[ $pattern_key ] ?? $block_metadata[ $key ] ?? null;
					if ( $value ) {
						$block_metadata[ $key ] = is_array( $value )
							? array_map( 'sanitize_text_field', $value )
							: sanitize_text_field( $value );
					}
				}

$blocks_to_insert[0]['attrs']['metadata'] = $block_metadata;
			}

$seen_refs[ $slug ] = true;
			$prev_inner_content = $inner_content;
			$inner_content      = null;
			$blocks_to_insert   = resolve_pattern_blocks( $blocks_to_insert );
			$inner_content      = $prev_inner_content;
			unset( $seen_refs[ $slug ] );
			array_splice( $blocks, $i, 1, $blocks_to_insert );

// If we have inner content, we need to insert nulls in the
			// inner content array, otherwise serialize_blocks will skip
			// blocks.
			if ( $inner_content ) {
				$null_indices  = array_keys( $inner_content, null, true );
				$content_index = $null_indices[ $i ];
				$nulls         = array_fill( 0, count( $blocks_to_insert ), null );
				array_splice( $inner_content, $content_index, 1, $nulls );
			}

// Skip inserted blocks.
			$i += count( $blocks_to_insert );
		} else {
			if ( ! empty( $blocks[ $i ]['innerBlocks'] ) ) {
				$prev_inner_content           = $inner_content;
				$inner_content                = $blocks[ $i ]['innerContent'];
				$blocks[ $i ]['innerBlocks']  = resolve_pattern_blocks(
					$blocks[ $i ]['innerBlocks']
				);
				$blocks[ $i ]['innerContent'] = $inner_content;
				$inner_content                = $prev_inner_content;
			}
			++$i;
		}
	}
	return $blocks;
}

/**
 * Given an array of parsed block trees, applies callbacks before and after serializing them and
 * returns their concatenated output.
 *
 * Recursively traverses the blocks and their inner blocks and applies the two callbacks provided as
 * arguments, the first one before serializing a block, and the second one after serializing.
 * If either callback returns a string value, it will be prepended and appended to the serialized
 * block markup, respectively.
 *
 * The callbacks will receive a reference to the current block as their first argument, so that they
 * can also modify it, and the current block's parent block as second argument. Finally, the
 * `$pre_callback` receives the previous block, whereas the `$post_callback` receives
 * the next block as third argument.
 *
 * Serialized blocks are returned including comment delimiters, and with all attributes serialized.
 *
 * This function should be used when there is a need to modify the saved blocks, or to inject markup
 * into the return value. Prefer `serialize_blocks` when preparing blocks to be saved to post content.
 *
 * This function is meant for internal use only.
 *
 * @since 6.4.0
 * @access private
 *
 * @see serialize_blocks()
 *
 * @param array[]  $blocks        An array of parsed blocks. See WP_Block_Parser_Block.
 * @param callable $pre_callback  Callback to run on each block in the tree before it is traversed and serialized.
 *                                It is called with the following arguments: &$block, $parent_block, $previous_block.
 *                                Its string return value will be prepended to the serialized block markup.
 * @param callable $post_callback Callback to run on each block in the tree after it is traversed and serialized.
 *                                It is called with the following arguments: &$block, $parent_block, $next_block.
 *                                Its string return value will be appended to the serialized block markup.
 * @return string Serialized block markup.
 */
function traverse_and_serialize_blocks( $blocks, $pre_callback = null, $post_callback = null ) {
	$result       = '';
	$parent_block = null; // At the top level, there is no parent block to pass to the callbacks; yet the callbacks expect a reference.

$pre_callback_is_callable  = is_callable( $pre_callback );
	$post_callback_is_callable = is_callable( $post_callback );

foreach ( $blocks as $index => $block ) {
		if ( $pre_callback_is_callable ) {
			$prev = 0 === $index
				? null
				: $blocks[ $index - 1 ];

$result .= call_user_func_array(
				$pre_callback,
				array( &$block, &$parent_block, $prev )
			);
		}

if ( $post_callback_is_callable ) {
			$next = count( $blocks ) - 1 === $index
				? null
				: $blocks[ $index + 1 ];

$post_markup = call_user_func_array(
				$post_callback,
				array( &$block, &$parent_block, $next )
			);
		}

$result .= traverse_and_serialize_block( $block, $pre_callback, $post_callback );
		$result .= $post_markup ?? '';
	}

return $result;
}

/**
 * Filters and sanitizes block content to remove non-allowable HTML
 * from parsed block attribute values.
 *
 * @since 5.3.1
 *
 * @param string         $text              Text that may contain block content.
 * @param array[]|string $allowed_html      Optional. An array of allowed HTML elements and attributes,
 *                                          or a context name such as 'post'. See wp_kses_allowed_html()
 *                                          for the list of accepted context names. Default 'post'.
 * @param string[]       $allowed_protocols Optional. Array of allowed URL protocols.
 *                                          Defaults to the result of wp_allowed_protocols().
 * @return string The filtered and sanitized content result.
 */
function filter_block_content( $text, $allowed_html = 'post', $allowed_protocols = array() ) {
	$result = '';

if ( str_contains( $text, '' ) ) {
		$text = preg_replace_callback( '%%', '_filter_block_content_callback', $text );
	}

$blocks = parse_blocks( $text );
	foreach ( $blocks as $block ) {
		$block   = filter_block_kses( $block, $allowed_html, $allowed_protocols );
		$result .= serialize_block( $block );
	}

return $result;
}

/**
 * Callback used for regular expression replacement in filter_block_content().
 *
 * @since 6.2.1
 * @access private
 *
 * @param array $matches Array of preg_replace_callback matches.
 * @return string Replacement string.
 */
function _filter_block_content_callback( $matches ) {
	return '';
}

/**
 * Filters and sanitizes a parsed block to remove non-allowable HTML
 * from block attribute values.
 *
 * @since 5.3.1
 *
 * @param WP_Block_Parser_Block $block             The parsed block object.
 * @param array[]|string        $allowed_html      An array of allowed HTML elements and attributes,
 *                                                 or a context name such as 'post'. See wp_kses_allowed_html()
 *                                                 for the list of accepted context names.
 * @param string[]              $allowed_protocols Optional. Array of allowed URL protocols.
 *                                                 Defaults to the result of wp_allowed_protocols().
 * @return array The filtered and sanitized block object result.
 */
function filter_block_kses( $block, $allowed_html, $allowed_protocols = array() ) {
	$block['attrs'] = filter_block_kses_value( $block['attrs'], $allowed_html, $allowed_protocols, $block );

if ( is_array( $block['innerBlocks'] ) ) {
		foreach ( $block['innerBlocks'] as $i => $inner_block ) {
			$block['innerBlocks'][ $i ] = filter_block_kses( $inner_block, $allowed_html, $allowed_protocols );
		}
	}

return $block;
}

/**
 * Filters and sanitizes a parsed block attribute value to remove
 * non-allowable HTML.
 *
 * @since 5.3.1
 * @since 6.5.5 Added the `$block_context` parameter.
 *
 * @param string[]|string $value             The attribute value to filter.
 * @param array[]|string  $allowed_html      An array of allowed HTML elements and attributes,
 *                                           or a context name such as 'post'. See wp_kses_allowed_html()
 *                                           for the list of accepted context names.
 * @param string[]        $allowed_protocols Optional. Array of allowed URL protocols.
 *                                           Defaults to the result of wp_allowed_protocols().
 * @param array           $block_context     Optional. The block the attribute belongs to, in parsed block array format.
 * @return string[]|string The filtered and sanitized result.
 */
function filter_block_kses_value( $value, $allowed_html, $allowed_protocols = array(), $block_context = null ) {
	if ( is_array( $value ) ) {
		foreach ( $value as $key => $inner_value ) {
			$filtered_key   = filter_block_kses_value( $key, $allowed_html, $allowed_protocols, $block_context );
			$filtered_value = filter_block_kses_value( $inner_value, $allowed_html, $allowed_protocols, $block_context );

if ( isset( $block_context['blockName'] ) && 'core/template-part' === $block_context['blockName'] ) {
				$filtered_value = filter_block_core_template_part_attributes( $filtered_value, $filtered_key, $allowed_html );
			}
			if ( $filtered_key !== $key ) {
				unset( $value[ $key ] );
			}

$value[ $filtered_key ] = $filtered_value;
		}
	} elseif ( is_string( $value ) ) {
		return wp_kses( $value, $allowed_html, $allowed_protocols );
	}

return $value;
}

/**
 * Sanitizes the value of the Template Part block's `tagName` attribute.
 *
 * @since 6.5.5
 *
 * @param string         $attribute_value The attribute value to filter.
 * @param string         $attribute_name  The attribute name.
 * @param array[]|string $allowed_html    An array of allowed HTML elements and attributes,
 *                                        or a context name such as 'post'. See wp_kses_allowed_html()
 *                                        for the list of accepted context names.
 * @return string The sanitized attribute value.
 */
function filter_block_core_template_part_attributes( $attribute_value, $attribute_name, $allowed_html ) {
	if ( empty( $attribute_value ) || 'tagName' !== $attribute_name ) {
		return $attribute_value;
	}
	if ( ! is_array( $allowed_html ) ) {
		$allowed_html = wp_kses_allowed_html( $allowed_html );
	}
	return isset( $allowed_html[ $attribute_value ] ) ? $attribute_value : '';
}

/**
 * Parses blocks out of a content string, and renders those appropriate for the excerpt.
 *
 * As the excerpt should be a small string of text relevant to the full post content,
 * this function renders the blocks that are most likely to contain such text.
 *
 * @since 5.0.0
 *
 * @param string $content The content to parse.
 * @return string The parsed and filtered content.
 */
function excerpt_remove_blocks( $content ) {
	if ( ! has_blocks( $content ) ) {
		return $content;
	}

$allowed_inner_blocks = array(
		// Classic blocks have their blockName set to null.
		null,
		'core/freeform',
		'core/heading',
		'core/html',
		'core/list',
		'core/media-text',
		'core/paragraph',
		'core/preformatted',
		'core/pullquote',
		'core/quote',
		'core/table',
		'core/verse',
	);

$allowed_wrapper_blocks = array(
		'core/columns',
		'core/column',
		'core/group',
	);

/**
	 * Filters the list of blocks that can be used as wrapper blocks, allowing
	 * excerpts to be generated from the `innerBlocks` of these wrappers.
	 *
	 * @since 5.8.0
	 *
	 * @param string[] $allowed_wrapper_blocks The list of names of allowed wrapper blocks.
	 */
	$allowed_wrapper_blocks = apply_filters( 'excerpt_allowed_wrapper_blocks', $allowed_wrapper_blocks );

$allowed_blocks = array_merge( $allowed_inner_blocks, $allowed_wrapper_blocks );

/**
	 * Filters the list of blocks that can contribute to the excerpt.
	 *
	 * If a dynamic block is added to this list, it must not generate another
	 * excerpt, as this will cause an infinite loop to occur.
	 *
	 * @since 5.0.0
	 *
	 * @param string[] $allowed_blocks The list of names of allowed blocks.
	 */
	$allowed_blocks = apply_filters( 'excerpt_allowed_blocks', $allowed_blocks );
	$blocks         = parse_blocks( $content );
	$output         = '';

foreach ( $blocks as $block ) {
		if ( in_array( $block['blockName'], $allowed_blocks, true ) ) {
			if ( ! empty( $block['innerBlocks'] ) ) {
				if ( in_array( $block['blockName'], $allowed_wrapper_blocks, true ) ) {
					$output .= _excerpt_render_inner_blocks( $block, $allowed_blocks );
					continue;
				}

// Skip the block if it has disallowed or nested inner blocks.
				foreach ( $block['innerBlocks'] as $inner_block ) {
					if (
						! in_array( $inner_block['blockName'], $allowed_inner_blocks, true ) ||
						! empty( $inner_block['innerBlocks'] )
					) {
						continue 2;
					}
				}
			}

$output .= render_block( $block );
		}
	}

return $output;
}

/**
 * Parses footnotes markup out of a content string,
 * and renders those appropriate for the excerpt.
 *
 * @since 6.3.0
 *
 * @param string $content The content to parse.
 * @return string The parsed and filtered content.
 */
function excerpt_remove_footnotes( $content ) {
	if ( ! str_contains( $content, 'data-fn=' ) ) {
		return $content;
	}

return preg_replace(
		'_\s*<a href="[^"]+" id="[^"]+">\d+</a>\s*_',
		'',
		$content
	);
}

/**
 * Renders inner blocks from the allowed wrapper blocks
 * for generating an excerpt.
 *
 * @since 5.8.0
 * @access private
 *
 * @param array $parsed_block   The parsed block.
 * @param array $allowed_blocks The list of allowed inner blocks.
 * @return string The rendered inner blocks.
 */
function _excerpt_render_inner_blocks( $parsed_block, $allowed_blocks ) {
	$output = '';

foreach ( $parsed_block['innerBlocks'] as $inner_block ) {
		if ( ! in_array( $inner_block['blockName'], $allowed_blocks, true ) ) {
			continue;
		}

if ( empty( $inner_block['innerBlocks'] ) ) {
			$output .= render_block( $inner_block );
		} else {
			$output .= _excerpt_render_inner_blocks( $inner_block, $allowed_blocks );
		}
	}

return $output;
}

/**
 * Renders a single block into a HTML string.
 *
 * @since 5.0.0
 *
 * @global WP_Post $post The post to edit.
 *
 * @param array $parsed_block {
 *     An associative array of the block being rendered. See WP_Block_Parser_Block.
 *
 *     @type string|null $blockName    Name of block.
 *     @type array       $attrs        Attributes from block comment delimiters.
 *     @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
 *                                     have the same structure as this one.
 *     @type string      $innerHTML    HTML from inside block comment delimiters.
 *     @type array       $innerContent List of string fragments and null markers where
 *                                     inner blocks were found.
 * }
 * @return string String of rendered HTML.
 */
function render_block( $parsed_block ) {
	global $post;
	$parent_block = null;

/**
	 * Allows render_block() to be short-circuited, by returning a non-null value.
	 *
	 * @since 5.1.0
	 * @since 5.9.0 The `$parent_block` parameter was added.
	 *
	 * @param string|null   $pre_render   The pre-rendered content. Default null.
	 * @param array         $parsed_block {
	 *     An associative array of the block being rendered. See WP_Block_Parser_Block.
	 *
	 *     @type string|null $blockName    Name of block.
	 *     @type array       $attrs        Attributes from block comment delimiters.
	 *     @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
	 *                                     have the same structure as this one.
	 *     @type string      $innerHTML    HTML from inside block comment delimiters.
	 *     @type array       $innerContent List of string fragments and null markers where
	 *                                     inner blocks were found.
	 * }
	 * @param WP_Block|null $parent_block If this is a nested block, a reference to the parent block.
	 */
	$pre_render = apply_filters( 'pre_render_block', null, $parsed_block, $parent_block );
	if ( ! is_null( $pre_render ) ) {
		return $pre_render;
	}

$source_block = $parsed_block;

/**
	 * Filters the block being rendered in render_block(), before it's processed.
	 *
	 * @since 5.1.0
	 * @since 5.9.0 The `$parent_block` parameter was added.
	 *
	 * @param array         $parsed_block {
	 *     An associative array of the block being rendered. See WP_Block_Parser_Block.
	 *
	 *     @type string|null $blockName    Name of block.
	 *     @type array       $attrs        Attributes from block comment delimiters.
	 *     @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
	 *                                     have the same structure as this one.
	 *     @type string      $innerHTML    HTML from inside block comment delimiters.
	 *     @type array       $innerContent List of string fragments and null markers where
	 *                                     inner blocks were found.
	 * }
	 * @param array         $source_block {
	 *     An un-modified copy of `$parsed_block`, as it appeared in the source content.
	 *     See WP_Block_Parser_Block.
	 *
	 *     @type string|null $blockName    Name of block.
	 *     @type array       $attrs        Attributes from block comment delimiters.
	 *     @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
	 *                                     have the same structure as this one.
	 *     @type string      $innerHTML    HTML from inside block comment delimiters.
	 *     @type array       $innerContent List of string fragments and null markers where
	 *                                     inner blocks were found.
	 * }
	 * @param WP_Block|null $parent_block If this is a nested block, a reference to the parent block.
	 */
	$parsed_block = apply_filters( 'render_block_data', $parsed_block, $source_block, $parent_block );

$context = array();

if ( $post instanceof WP_Post ) {
		$context['postId'] = $post->ID;

/*
		 * The `postType` context is largely unnecessary server-side, since the ID
		 * is usually sufficient on its own. That being said, since a block's
		 * manifest is expected to be shared between the server and the client,
		 * it should be included to consistently fulfill the expectation.
		 */
		$context['postType'] = $post->post_type;
	}

/**
	 * Filters the default context provided to a rendered block.
	 *
	 * @since 5.5.0
	 * @since 5.9.0 The `$parent_block` parameter was added.
	 *
	 * @param array         $context      Default context.
	 * @param array         $parsed_block {
	 *     An associative array of the block being rendered. See WP_Block_Parser_Block.
	 *
	 *     @type string|null $blockName    Name of block.
	 *     @type array       $attrs        Attributes from block comment delimiters.
	 *     @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
	 *                                     have the same structure as this one.
	 *     @type string      $innerHTML    HTML from inside block comment delimiters.
	 *     @type array       $innerContent List of string fragments and null markers where
	 *                                     inner blocks were found.
	 * }
	 * @param WP_Block|null $parent_block If this is a nested block, a reference to the parent block.
	 */
	$context = apply_filters( 'render_block_context', $context, $parsed_block, $parent_block );

$block = new WP_Block( $parsed_block, $context );

return $block->render();
}

/**
 * Parses blocks out of a content string.
 *
 * Given an HTML document, this function fully-parses block content, producing
 * a tree of blocks and their contents, as well as top-level non-block content,
 * which will appear as a block with no `blockName`.
 *
 * This function can be memory heavy for certain documents, particularly those
 * with deeply-nested blocks or blocks with extensive attribute values. Further,
 * this function must parse an entire document in one atomic operation.
 *
 * If the entire parsed document is not necessary, consider using {@see WP_Block_Processor}
 * instead, as it provides a streaming and low-overhead interface for finding blocks.
 *
 * @since 5.0.0
 *
 * @param string $content Post content.
 * @return array[] {
 *     Array of block structures.
 *
 *     @type array ...$0 {
 *         An associative array of a single parsed block object. See WP_Block_Parser_Block.
 *
 *         @type string|null $blockName    Name of block.
 *         @type array       $attrs        Attributes from block comment delimiters.
 *         @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
 *                                         have the same structure as this one.
 *         @type string      $innerHTML    HTML from inside block comment delimiters.
 *         @type array       $innerContent List of string fragments and null markers where
 *                                         inner blocks were found.
 *     }
 * }
 */
function parse_blocks( $content ) {
	/**
	 * Filter to allow plugins to replace the server-side block parser.
	 *
	 * @since 5.0.0
	 *
	 * @param string $parser_class Name of block parser class.
	 */
	$parser_class = apply_filters( 'block_parser_class', 'WP_Block_Parser' );

$parser = new $parser_class();
	return $parser->parse( $content );
}

/**
 * Parses dynamic blocks out of `post_content` and re-renders them.
 *
 * @since 5.0.0
 *
 * @param string $content Post content.
 * @return string Updated post content.
 */
function do_blocks( $content ) {
	$blocks                = parse_blocks( $content );
	$top_level_block_count = count( $blocks );
	$output                = '';

/**
	 * Parsed blocks consist of a list of top-level blocks. Those top-level
	 * blocks may themselves contain nested inner blocks. However, every
	 * top-level block is rendered independently, meaning there are no data
	 * dependencies between them.
	 *
	 * Ideally, therefore, the parser would only need to parse one complete
	 * top-level block at a time, render it, and move on. Unfortunately, this
	 * is not possible with {@see \parse_blocks()} because it must parse the
	 * entire given document at once.
	 *
	 * While the current implementation prevents this optimization, it’s still
	 * possible to reduce the peak memory use when calls to `render_block()`
	 * on those top-level blocks are memory-heavy (which many of them are).
	 * By setting each parsed block to `NULL` after rendering it, any memory
	 * allocated during the render will be freed and reused for the next block.
	 * Before making this change, that memory was retained and would lead to
	 * out-of-memory crashes for certain posts that now run with this change.
	 */
	for ( $i = 0; $i < $top_level_block_count; $i++ ) {
		$output .= render_block( $blocks[ $i ] );
		$blocks[ $i ] = null;
	}

// If there are blocks in this content, we shouldn't run wpautop() on it later.
	$priority = has_filter( 'the_content', 'wpautop' );
	if ( false !== $priority && doing_filter( 'the_content' ) && has_blocks( $content ) ) {
		remove_filter( 'the_content', 'wpautop', $priority );
		add_filter( 'the_content', '_restore_wpautop_hook', $priority + 1 );
	}

return $output;
}

/**
 * If do_blocks() needs to remove wpautop() from the `the_content` filter, this re-adds it afterwards,
 * for subsequent `the_content` usage.
 *
 * @since 5.0.0
 * @access private
 *
 * @param string $content The post content running through this filter.
 * @return string The unmodified content.
 */
function _restore_wpautop_hook( $content ) {
	$current_priority = has_filter( 'the_content', '_restore_wpautop_hook' );

add_filter( 'the_content', 'wpautop', $current_priority - 1 );
	remove_filter( 'the_content', '_restore_wpautop_hook', $current_priority );

return $content;
}

/**
 * Returns the current version of the block format that the content string is using.
 *
 * If the string doesn't contain blocks, it returns 0.
 *
 * @since 5.0.0
 *
 * @param string $content Content to test.
 * @return int The block format version is 1 if the content contains one or more blocks, 0 otherwise.
 */
function block_version( $content ) {
	return has_blocks( $content ) ? 1 : 0;
}

/**
 * Registers a new block style.
 *
 * @since 5.3.0
 * @since 6.6.0 Added support for registering styles for multiple block types.
 *
 * @link https://developer.wordpress.org/block-editor/reference-guides/block-api/block-styles/
 *
 * @param string|string[] $block_name       Block type name including namespace or array of namespaced block type names.
 * @param array           $style_properties Array containing the properties of the style name, label,
 *                                          style_handle (name of the stylesheet to be enqueued),
 *                                          inline_style (string containing the CSS to be added),
 *                                          style_data (theme.json-like array to generate CSS from).
 *                                          See WP_Block_Styles_Registry::register().
 * @return bool True if the block style was registered with success and false otherwise.
 */
function register_block_style( $block_name, $style_properties ) {
	return WP_Block_Styles_Registry::get_instance()->register( $block_name, $style_properties );
}

/**
 * Unregisters a block style.
 *
 * @since 5.3.0
 *
 * @param string $block_name       Block type name including namespace.
 * @param string $block_style_name Block style name.
 * @return bool True if the block style was unregistered with success and false otherwise.
 */
function unregister_block_style( $block_name, $block_style_name ) {
	return WP_Block_Styles_Registry::get_instance()->unregister( $block_name, $block_style_name );
}

/**
 * Checks whether the current block type supports the feature requested.
 *
 * @since 5.8.0
 * @since 6.4.0 The `$feature` parameter now supports a string.
 *
 * @param WP_Block_Type|null $block_type    Block type to check for support.
 * @param string|array       $feature       Feature slug, or path to a specific feature to check support for.
 * @param mixed              $default_value Optional. Fallback value for feature support. Default false.
 * @return bool Whether the feature is supported.
 */
function block_has_support( $block_type, $feature, $default_value = false ) {
	$block_support = $default_value;
	if ( $block_type instanceof WP_Block_Type ) {
		if ( is_array( $feature ) && count( $feature ) === 1 ) {
			$feature = $feature[0];
		}

if ( is_array( $feature ) ) {
			$block_support = _wp_array_get( $block_type->supports, $feature, $default_value );
		} elseif ( isset( $block_type->supports[ $feature ] ) ) {
			$block_support = $block_type->supports[ $feature ];
		}
	}

return true === $block_support || is_array( $block_support );
}

/**
 * Converts typography keys declared under `supports.*` to `supports.typography.*`.
 *
 * Displays a `_doing_it_wrong()` notice when a block using the older format is detected.
 *
 * @since 5.8.0
 *
 * @param array $metadata Metadata for registering a block type.
 * @return array Filtered metadata for registering a block type.
 */
function wp_migrate_old_typography_shape( $metadata ) {
	if ( ! isset( $metadata['supports'] ) ) {
		return $metadata;
	}

$typography_keys = array(
		'__experimentalFontFamily',
		'__experimentalFontStyle',
		'__experimentalFontWeight',
		'__experimentalLetterSpacing',
		'__experimentalTextDecoration',
		'__experimentalTextTransform',
		'fontSize',
		'lineHeight',
	);

foreach ( $typography_keys as $typography_key ) {
		$support_for_key = $metadata['supports'][ $typography_key ] ?? null;

if ( null !== $support_for_key ) {
			_doing_it_wrong(
				'register_block_type_from_metadata()',
				sprintf(
					/* translators: 1: Block type, 2: Typography supports key, e.g: fontSize, lineHeight, etc. 3: block.json, 4: Old metadata key, 5: New metadata key. */
					__( 'Block "%1$s" is declaring %2$s support in %3$s file under %4$s. %2$s support is now declared under %5$s.' ),
					$metadata['name'],
					"<code>$typography_key</code>",
					'<code>block.json</code>',
					"<code>supports.$typography_key</code>",
					"<code>supports.typography.$typography_key</code>"
				),
				'5.8.0'
			);

_wp_array_set( $metadata['supports'], array( 'typography', $typography_key ), $support_for_key );
			unset( $metadata['supports'][ $typography_key ] );
		}
	}

return $metadata;
}

/**
 * Helper function that constructs a WP_Query args array from
 * a `Query` block properties.
 *
 * It's used in Query Loop, Query Pagination Numbers and Query Pagination Next blocks.
 *
 * @since 5.8.0
 * @since 6.1.0 Added `query_loop_block_query_vars` filter and `parents` support in query.
 * @since 6.7.0 Added support for the `format` property in query.
 * @since 7.0.0 Updated `taxQuery` structure.
 *
 * @param WP_Block $block Block instance.
 * @param int      $page  Current query's page.
 *
 * @return array Returns the constructed WP_Query arguments.
 */
function build_query_vars_from_query_block( $block, $page ) {
	$query = array(
		'post_type'    => 'post',
		'order'        => 'DESC',
		'orderby'      => 'date',
		'post__not_in' => array(),
		'tax_query'    => array(),
	);

if ( isset( $block->context['query'] ) ) {
		if ( ! empty( $block->context['query']['postType'] ) ) {
			$post_type_param = $block->context['query']['postType'];
			if ( is_post_type_viewable( $post_type_param ) ) {
				$query['post_type'] = $post_type_param;
			}
		}
		if ( isset( $block->context['query']['sticky'] ) && ! empty( $block->context['query']['sticky'] ) ) {
			$sticky = get_option( 'sticky_posts' );
			if ( 'only' === $block->context['query']['sticky'] ) {
				/*
				 * Passing an empty array to post__in will return have_posts() as true (and all posts will be returned).
				 * Logic should be used before hand to determine if WP_Query should be used in the event that the array
				 * being passed to post__in is empty.
				 *
				 * @see https://core.trac.wordpress.org/ticket/28099
				 */
				$query['post__in']            = ! empty( $sticky ) ? $sticky : array( 0 );
				$query['ignore_sticky_posts'] = 1;
			} elseif ( 'exclude' === $block->context['query']['sticky'] ) {
				$query['post__not_in'] = array_merge( $query['post__not_in'], $sticky );
			} elseif ( 'ignore' === $block->context['query']['sticky'] ) {
				$query['ignore_sticky_posts'] = 1;
			}
		}
		if ( ! empty( $block->context['query']['exclude'] ) ) {
			$excluded_post_ids     = array_map( 'intval', $block->context['query']['exclude'] );
			$excluded_post_ids     = array_filter( $excluded_post_ids );
			$query['post__not_in'] = array_merge( $query['post__not_in'], $excluded_post_ids );
		}
		if (
			isset( $block->context['query']['perPage'] ) &&
			is_numeric( $block->context['query']['perPage'] )
		) {
			$per_page = absint( $block->context['query']['perPage'] );
			$offset   = 0;

if (
				isset( $block->context['query']['offset'] ) &&
				is_numeric( $block->context['query']['offset'] )
			) {
				$offset = absint( $block->context['query']['offset'] );
			}

$query['offset']         = ( $per_page * ( $page - 1 ) ) + $offset;
			$query['posts_per_page'] = $per_page;
		}
		// Migrate `categoryIds` and `tagIds` to `tax_query` for backwards compatibility.
		if ( ! empty( $block->context['query']['categoryIds'] ) || ! empty( $block->context['query']['tagIds'] ) ) {
			$tax_query_back_compat = array();
			if ( ! empty( $block->context['query']['categoryIds'] ) ) {
				$tax_query_back_compat[] = array(
					'taxonomy'         => 'category',
					'terms'            => array_filter( array_map( 'intval', $block->context['query']['categoryIds'] ) ),
					'include_children' => false,
				);
			}
			if ( ! empty( $block->context['query']['tagIds'] ) ) {
				$tax_query_back_compat[] = array(
					'taxonomy'         => 'post_tag',
					'terms'            => array_filter( array_map( 'intval', $block->context['query']['tagIds'] ) ),
					'include_children' => false,
				);
			}
			$query['tax_query'] = array_merge( $query['tax_query'], $tax_query_back_compat );
		}

if ( ! empty( $block->context['query']['taxQuery'] ) && is_array( $block->context['query']['taxQuery'] ) ) {
			$tax_query_input = $block->context['query']['taxQuery'];
			$tax_query       = array();
			// If there are keys other than include/exclude, it's the old
			// format e.g. "taxQuery":{"category":[4]}
			if ( ! empty( array_diff( array_keys( $tax_query_input ), array( 'include', 'exclude' ) ) ) ) {
				foreach ( $block->context['query']['taxQuery'] as $taxonomy => $terms ) {
					if ( is_taxonomy_viewable( $taxonomy ) && ! empty( $terms ) ) {
						$tax_query[] = array(
							'taxonomy'         => $taxonomy,
							'terms'            => array_filter( array_map( 'intval', $terms ) ),
							'include_children' => false,
						);
					}
				}
			} else {
				// This is the new format e.g. "taxQuery":{"include":{"category":[4]},"exclude":{"post_tag":[5]}}

// Helper function to build tax_query conditions from taxonomy terms.
				$build_conditions = static function ( $terms, string $operator = 'IN' ): array {
					$terms      = (array) $terms;
					$conditions = array();
					foreach ( $terms as $taxonomy => $tax_terms ) {
						if ( ! empty( $tax_terms ) && is_taxonomy_viewable( $taxonomy ) ) {
							$conditions[] = array(
								'taxonomy'         => $taxonomy,
								'terms'            => array_filter( array_map( 'intval', $tax_terms ) ),
								'operator'         => $operator,
								'include_children' => false,
							);
						}
					}
					return $conditions;
				};

// Separate exclude from include terms.
				$exclude_terms = isset( $tax_query_input['exclude'] ) && is_array( $tax_query_input['exclude'] )
					? $tax_query_input['exclude']
					: array();
				$include_terms = isset( $tax_query_input['include'] ) && is_array( $tax_query_input['include'] )
					? $tax_query_input['include']
					: array();

$tax_query = array_merge(
					$build_conditions( $include_terms ),
					$build_conditions( $exclude_terms, 'NOT IN' )
				);
			}

if ( ! empty( $tax_query ) ) {
				// Merge with any existing `tax_query` conditions.
				$query['tax_query'] = array_merge( $query['tax_query'], $tax_query );
			}
		}
		if ( ! empty( $block->context['query']['format'] ) && is_array( $block->context['query']['format'] ) ) {
			$formats = $block->context['query']['format'];
			/*
			 * Validate that the format is either `standard` or a supported post format.
			 * - First, add `standard` to the array of valid formats.
			 * - Then, remove any invalid formats.
			 */
			$valid_formats = array_merge( array( 'standard' ), get_post_format_slugs() );
			$formats       = array_intersect( $formats, $valid_formats );

/*
			 * The relation needs to be set to `OR` since the request can contain
			 * two separate conditions. The user may be querying for items that have
			 * either the `standard` format or a specific format.
			 */
			$formats_query = array( 'relation' => 'OR' );

/*
			 * The default post format, `standard`, is not stored in the database.
			 * If `standard` is part of the request, the query needs to exclude all post items that
			 * have a format assigned.
			 */
			if ( in_array( 'standard', $formats, true ) ) {
				$formats_query[] = array(
					'taxonomy' => 'post_format',
					'field'    => 'slug',
					'operator' => 'NOT EXISTS',
				);
				// Remove the `standard` format, since it cannot be queried.
				unset( $formats[ array_search( 'standard', $formats, true ) ] );
			}
			// Add any remaining formats to the formats query.
			if ( ! empty( $formats ) ) {
				// Add the `post-format-` prefix.
				$terms           = array_map(
					static function ( $format ) {
						return "post-format-$format";
					},
					$formats
				);
				$formats_query[] = array(
					'taxonomy' => 'post_format',
					'field'    => 'slug',
					'terms'    => $terms,
					'operator' => 'IN',
				);
			}

/*
			 * Add `$formats_query` to `$query`, as long as it contains more than one key:
			 * If `$formats_query` only contains the initial `relation` key, there are no valid formats to query,
			 * and the query should not be modified.
			 */
			if ( count( $formats_query ) > 1 ) {
				// Enable filtering by both post formats and other taxonomies by combining them with `AND`.
				if ( empty( $query['tax_query'] ) ) {
					$query['tax_query'] = $formats_query;
				} else {
					$query['tax_query'] = array(
						'relation' => 'AND',
						$query['tax_query'],
						$formats_query,
					);
				}
			}
		}

if (
			isset( $block->context['query']['order'] ) &&
				in_array( strtoupper( $block->context['query']['order'] ), array( 'ASC', 'DESC' ), true )
		) {
			$query['order'] = strtoupper( $block->context['query']['order'] );
		}
		if ( isset( $block->context['query']['orderBy'] ) ) {
			$query['orderby'] = $block->context['query']['orderBy'];
		}
		if (
			isset( $block->context['query']['author'] )
		) {
			if ( is_array( $block->context['query']['author'] ) ) {
				$query['author__in'] = array_filter( array_map( 'intval', $block->context['query']['author'] ) );
			} elseif ( is_string( $block->context['query']['author'] ) ) {
				$query['author__in'] = array_filter( array_map( 'intval', explode( ',', $block->context['query']['author'] ) ) );
			} elseif ( is_int( $block->context['query']['author'] ) && $block->context['query']['author'] > 0 ) {
				$query['author'] = $block->context['query']['author'];
			}
		}
		if ( ! empty( $block->context['query']['search'] ) ) {
			$query['s'] = $block->context['query']['search'];
		}
		if ( ! empty( $block->context['query']['parents'] ) && is_post_type_hierarchical( $query['post_type'] ) ) {
			$query['post_parent__in'] = array_unique( array_map( 'intval', $block->context['query']['parents'] ) );
		}
	}

/**
	 * Filters the arguments which will be passed to `WP_Query` for the Query Loop Block.
	 *
	 * Anything to this filter should be compatible with the `WP_Query` API to form
	 * the query context which will be passed down to the Query Loop Block's children.
	 * This can help, for example, to include additional settings or meta queries not
	 * directly supported by the core Query Loop Block, and extend its capabilities.
	 *
	 * Please note that this will only influence the query that will be rendered on the
	 * front-end. The editor preview is not affected by this filter. Also, worth noting
	 * that the editor preview uses the REST API, so, ideally, one should aim to provide
	 * attributes which are also compatible with the REST API, in order to be able to
	 * implement identical queries on both sides.
	 *
	 * @since 6.1.0
	 *
	 * @param array    $query Array containing parameters for `WP_Query` as parsed by the block context.
	 * @param WP_Block $block Block instance.
	 * @param int      $page  Current query's page.
	 */
	return apply_filters( 'query_loop_block_query_vars', $query, $block, $page );
}

/**
 * Helper function that returns the proper pagination arrow HTML for
 * `QueryPaginationNext` and `QueryPaginationPrevious` blocks based
 * on the provided `paginationArrow` from `QueryPagination` context.
 *
 * It's used in QueryPaginationNext and QueryPaginationPrevious blocks.
 *
 * @since 5.9.0
 *
 * @param WP_Block $block Block instance.
 * @param bool $is_next Flag for handling `next/previous` blocks.
 * @return string|null The pagination arrow HTML or null if there is none.
 */
function get_query_pagination_arrow( $block, $is_next ) {
	$arrow_map = array(
		'none' => '',
		'arrow' => array(
			'next' => '→',
			'previous' => '←',
		),
		'chevron' => array(
			'next' => '»',
			'previous' => '«',
		),
	);
	if ( ! empty( $block->context['paginationArrow'] ) && array_key_exists( $block->context['paginationArrow'], $arrow_map ) && ! empty( $arrow_map[ $block->context['paginationArrow'] ] ) ) {
		$pagination_type = $is_next ? 'next' : 'previous';
		$arrow_attribute = $block->context['paginationArrow'];
		$arrow = $arrow_map[ $block->context['paginationArrow'] ][ $pagination_type ];
		$arrow_classes = "wp-block-query-pagination-$pagination_type-arrow is-arrow-$arrow_attribute";
		return "$arrow";
	}
	return null;
}

/**
 * Helper function that constructs a comment query vars array from the passed
 * block properties.
 *
 * It's used with the Comment Query Loop inner blocks.
 *
 * @since 6.0.0
 *
 * @param WP_Block $block Block instance.
 * @return array Returns the comment query parameters to use with the
 *               WP_Comment_Query constructor.
 */
function build_comment_query_vars_from_block( $block ) {

$comment_args = array(
		'orderby'       => 'comment_date_gmt',
		'order'         => 'ASC',
		'status'        => 'approve',
		'no_found_rows' => false,
	);

if ( is_user_logged_in() ) {
		$comment_args['include_unapproved'] = array( get_current_user_id() );
	} else {
		$unapproved_email = wp_get_unapproved_comment_author_email();

if ( $unapproved_email ) {
			$comment_args['include_unapproved'] = array( $unapproved_email );
		}
	}

if ( ! empty( $block->context['postId'] ) ) {
		$comment_args['post_id'] = (int) $block->context['postId'];
	}

if ( get_option( 'thread_comments' ) ) {
		$comment_args['hierarchical'] = 'threaded';
	} else {
		$comment_args['hierarchical'] = false;
	}

if ( get_option( 'page_comments' ) === '1' || get_option( 'page_comments' ) === true ) {
		$per_page     = get_option( 'comments_per_page' );
		$default_page = get_option( 'default_comments_page' );
		if ( $per_page > 0 ) {
			$comment_args['number'] = $per_page;

$page = (int) get_query_var( 'cpage' );
			if ( $page ) {
				$comment_args['paged'] = $page;
			} elseif ( 'oldest' === $default_page ) {
				$comment_args['paged'] = 1;
			} elseif ( 'newest' === $default_page ) {
				$max_num_pages = (int) ( new WP_Comment_Query( $comment_args ) )->max_num_pages;
				if ( 0 !== $max_num_pages ) {
					$comment_args['paged'] = $max_num_pages;
				}
			}
		}
	}

return $comment_args;
}

/**
 * Helper function that returns the proper pagination arrow HTML for
 * `CommentsPaginationNext` and `CommentsPaginationPrevious` blocks based on the
 * provided `paginationArrow` from `CommentsPagination` context.
 *
 * It's used in CommentsPaginationNext and CommentsPaginationPrevious blocks.
 *
 * @since 6.0.0
 *
 * @param WP_Block $block Block instance.
 * @param string $pagination_type Optional. Type of the arrow we will be rendering.
 * Accepts 'next' or 'previous'. Default 'next'.
 * @return string|null The pagination arrow HTML or null if there is none.
 */
function get_comments_pagination_arrow( $block, $pagination_type = 'next' ) {
	$arrow_map = array(
		'none' => '',
		'arrow' => array(
			'next' => '→',
			'previous' => '←',
		),
		'chevron' => array(
			'next' => '»',
			'previous' => '«',
		),
	);
	if ( ! empty( $block->context['comments/paginationArrow'] ) && ! empty( $arrow_map[ $block->context['comments/paginationArrow'] ][ $pagination_type ] ) ) {
		$arrow_attribute = $block->context['comments/paginationArrow'];
		$arrow = $arrow_map[ $block->context['comments/paginationArrow'] ][ $pagination_type ];
		$arrow_classes = "wp-block-comments-pagination-$pagination_type-arrow is-arrow-$arrow_attribute";
		return "$arrow";
	}
	return null;
}

/**
 * Strips all HTML from the content of footnotes, and sanitizes the ID.
 *
 * This function expects slashed data on the footnotes content.
 *
 * @access private
 * @since 6.3.2
 *
 * @param string $footnotes JSON-encoded string of an array containing the content and ID of each footnote.
 * @return string Filtered content without any HTML on the footnote content and with the sanitized ID.
 */
function _wp_filter_post_meta_footnotes( $footnotes ) {
	$footnotes_decoded = json_decode( $footnotes, true );
	if ( ! is_array( $footnotes_decoded ) ) {
		return '';
	}
	$footnotes_sanitized = array();
	foreach ( $footnotes_decoded as $footnote ) {
		if ( ! empty( $footnote['content'] ) && ! empty( $footnote['id'] ) ) {
			$footnotes_sanitized[] = array(
				'id'      => sanitize_key( $footnote['id'] ),
				'content' => wp_unslash( wp_filter_post_kses( wp_slash( $footnote['content'] ) ) ),
			);
		}
	}
	return wp_json_encode( $footnotes_sanitized );
}

/**
 * Adds the filters for footnotes meta field.
 *
 * @access private
 * @since 6.3.2
 */
function _wp_footnotes_kses_init_filters() {
	add_filter( 'sanitize_post_meta_footnotes', '_wp_filter_post_meta_footnotes' );
}

/**
 * Removes the filters for footnotes meta field.
 *
 * @access private
 * @since 6.3.2
 */
function _wp_footnotes_remove_filters() {
	remove_filter( 'sanitize_post_meta_footnotes', '_wp_filter_post_meta_footnotes' );
}

/**
 * Registers the filter of footnotes meta field if the user does not have `unfiltered_html` capability.
 *
 * @access private
 * @since 6.3.2
 */
function _wp_footnotes_kses_init() {
	_wp_footnotes_remove_filters();
	if ( ! current_user_can( 'unfiltered_html' ) ) {
		_wp_footnotes_kses_init_filters();
	}
}

/**
 * Initializes the filters for footnotes meta field when imported data should be filtered.
 *
 * This filter is the last one being executed on {@see 'force_filtered_html_on_import'}.
 * If the input of the filter is true, it means we are in an import situation and should
 * enable kses, independently of the user capabilities. So in that case we call
 * _wp_footnotes_kses_init_filters().
 *
 * @access private
 * @since 6.3.2
 *
 * @param string $arg Input argument of the filter.
 * @return string Input argument of the filter.
 */
function _wp_footnotes_force_filtered_html_on_import_filter( $arg ) {
	// If `force_filtered_html_on_import` is true, we need to init the global styles kses filters.
	if ( $arg ) {
		_wp_footnotes_kses_init_filters();
	}
	return $arg;
}

/**
 * Exposes blocks with autoRegister flag for ServerSideRender in the editor.
 *
 * Detects blocks that have the autoRegister flag set in their supports
 * and passes them to JavaScript for auto-registration with ServerSideRender.
 *
 * @access private
 * @since 7.0.0
 */
function _wp_enqueue_auto_register_blocks() {
	$auto_register_blocks = array();
	$registered_blocks    = WP_Block_Type_Registry::get_instance()->get_all_registered();

foreach ( $registered_blocks as $block_name => $block_type ) {
		if ( ! empty( $block_type->supports['autoRegister'] ) && ! empty( $block_type->render_callback ) ) {
			$auto_register_blocks[] = $block_name;
		}
	}

if ( ! empty( $auto_register_blocks ) ) {
		wp_add_inline_script(
			'wp-block-library',
			sprintf( 'window.__unstableAutoRegisterBlocks = %s;', wp_json_encode( $auto_register_blocks ) ),
			'before'
		);
	}
}

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class-wp-block-metadata-registry.php	11.6K	V E R D
class-wp-block-parser-block.php	2.5K	V E R D
class-wp-block-parser-frame.php	1.9K	V E R D
class-wp-block-parser.php	11.3K	V E R D
class-wp-block-pattern-categories-registry.php	4.3K	V E R D
class-wp-block-patterns-registry.php	10.1K	V E R D
class-wp-block-styles-registry.php	6.3K	V E R D
class-wp-block-supports.php	6.4K	V E R D
class-wp-block-template.php	2K	V E R D
class-wp-block-templates-registry.php	6.9K	V E R D
class-wp-block-type-registry.php	4.9K	V E R D
class-wp-block-type.php	16.8K	V E R D
class-wp-block.php	24.1K	V E R D
class-wp-classic-to-block-menu-converter.php	3.9K	V E R D
class-wp-comment-query.php	47.5K	V E R D
class-wp-comment.php	9.2K	V E R D
class-wp-connector-registry.php	14.1K	V E R D
class-wp-customize-control.php	25.5K	V E R D
class-wp-customize-manager.php	198.1K	V E R D
class-wp-customize-nav-menus.php	56.6K	V E R D
class-wp-customize-panel.php	10.5K	V E R D
class-wp-customize-section.php	10.9K	V E R D
class-wp-customize-setting.php	29.3K	V E R D
class-wp-customize-widgets.php	70.9K	V E R D
class-wp-date-query.php	35.1K	V E R D
class-wp-dependencies.php	16.7K	V E R D
class-wp-dependency.php	2.6K	V E R D
class-wp-duotone.php	40K	V E R D
class-wp-editor.php	70.5K	V E R D
class-wp-embed.php	15.5K	V E R D
class-wp-error.php	7.3K	V E R D
class-wp-exception.php	253	V E R D
class-wp-fatal-error-handler.php	8K	V E R D
class-wp-feed-cache-transient.php	3.2K	V E R D
class-wp-feed-cache.php	969	V E R D
class-wp-hook.php	16.2K	V E R D
class-wp-http-cookie.php	7.1K	V E R D
class-wp-http-curl.php	13K	V E R D
class-wp-http-encoding.php	6.5K	V E R D
class-wp-http-ixr-client.php	3.4K	V E R D
class-wp-http-proxy.php	5.8K	V E R D
class-wp-http-requests-hooks.php	2K	V E R D
class-wp-http-requests-response.php	4.1K	V E R D
class-wp-http-response.php	2.9K	V E R D
class-wp-http-streams.php	16.4K	V E R D
class-wp-http.php	40.7K	V E R D
class-wp-icons-registry.php	7.7K	V E R D
class-wp-image-editor-gd.php	20.2K	V E R D
class-wp-image-editor-imagick.php	36.1K	V E R D
class-wp-image-editor.php	17K	V E R D
class-wp-list-util.php	7.3K	V E R D
class-wp-locale-switcher.php	6.6K	V E R D
class-wp-locale.php	16.5K	V E R D
class-wp-matchesmapregex.php	1.8K	V E R D
class-wp-meta-query.php	29.8K	V E R D
class-wp-metadata-lazyloader.php	6.7K	V E R D
class-wp-navigation-fallback.php	9K	V E R D
class-wp-network-query.php	19.3K	V E R D
class-wp-network.php	12K	V E R D
class-wp-object-cache.php	17.1K	V E R D
class-wp-oembed-controller.php	6.7K	V E R D
class-wp-oembed.php	30.9K	V E R D
class-wp-paused-extensions-storage.php	4.9K	V E R D
class-wp-phpmailer.php	4.2K	V E R D
class-wp-plugin-dependencies.php	24.6K	V E R D
class-wp-post-type.php	30K	V E R D
class-wp-post.php	6.3K	V E R D
class-wp-query.php	159.6K	V E R D
class-wp-recovery-mode-cookie-service.php	6.7K	V E R D
class-wp-recovery-mode-email-service.php	10.9K	V E R D
class-wp-recovery-mode-key-service.php	4.8K	V E R D
class-wp-recovery-mode-link-service.php	3.4K	V E R D
class-wp-recovery-mode.php	11.2K	V E R D
class-wp-rewrite.php	62.2K	V E R D
class-wp-role.php	2.5K	V E R D
class-wp-roles.php	9.1K	V E R D
class-wp-script-modules.php	39.6K	V E R D
class-wp-scripts.php	35.9K	V E R D
class-wp-session-tokens.php	7.1K	V E R D
class-wp-simplepie-file.php	3.5K	V E R D
class-wp-simplepie-sanitize-kses.php	1.9K	V E R D
class-wp-site-query.php	30.7K	V E R D
class-wp-site.php	7.3K	V E R D
class-wp-speculation-rules.php	7.4K	V E R D
class-wp-styles.php	13K	V E R D
class-wp-tax-query.php	19.1K	V E R D
class-wp-taxonomy.php	18.1K	V E R D
class-wp-term-query.php	39.8K	V E R D
class-wp-term.php	5.1K	V E R D
class-wp-text-diff-renderer-inline.php	979	V E R D
class-wp-text-diff-renderer-table.php	18.5K	V E R D
class-wp-textdomain-registry.php	10.2K	V E R D
class-wp-theme-json-data.php	1.8K	V E R D
class-wp-theme-json-resolver.php	34.9K	V E R D
class-wp-theme-json-schema.php	7.2K	V E R D
class-wp-theme-json.php	169.6K	V E R D
class-wp-theme.php	64.2K	V E R D
class-wp-token-map.php	27.9K	V E R D
class-wp-url-pattern-prefixer.php	4.7K	V E R D
class-wp-user-meta-session-tokens.php	2.9K	V E R D
class-wp-user-query.php	43.1K	V E R D
class-wp-user-request.php	2.3K	V E R D
class-wp-user.php	22.5K	V E R D
class-wp-walker.php	13K	V E R D
class-wp-widget-factory.php	3.3K	V E R D
class-wp-widget.php	18K	V E R D
class-wp-xmlrpc-server.php	210K	V E R D
class-wp.php	25.9K	V E R D
class-wpdb.php	115.9K	V E R D
class.wp-dependencies.php	373	V E R D
class.wp-scripts.php	343	V E R D
class.wp-styles.php	338	V E R D
comment-template.php	100.8K	V E R D
compat.php	15.7K	V E R D
connectors.php	23.5K	V E R D
cron.php	43.9K	V E R D
date.php	400	V E R D
default-constants.php	11.1K	V E R D
default-filters.php	36.5K	V E R D
default-widgets.php	2.2K	V E R D
deprecated.php	189.4K	V E R D
embed-template.php	338	V E R D
error-protection.php	4K	V E R D
feed-atom-comments.php	5.4K	V E R D
feed-atom.php	3K	V E R D
feed-rdf.php	2.6K	V E R D
feed-rss.php	1.2K	V E R D
feed-rss2-comments.php	4K	V E R D
feed-rss2.php	3.7K	V E R D
feed.php	24.6K	V E R D
fonts.php	9.6K	V E R D
formatting.php	346.6K	V E R D
functions.wp-scripts.php	20K	V E R D
functions.wp-styles.php	8.5K	V E R D
general-template.php	170.8K	V E R D
global-styles-and-settings.php	20.3K	V E R D
https-detection.php	5.7K	V E R D
https-migration.php	4.6K	V E R D
kses.php	81K	V E R D
l10n.php	69.7K	V E R D
link-template.php	156.4K	V E R D
locale.php	162	V E R D
media-template.php	61.8K	V E R D
media.php	219.7K	V E R D
meta.php	65.2K	V E R D
ms-blogs.php	25.7K	V E R D
ms-default-constants.php	4.8K	V E R D
ms-default-filters.php	6.5K	V E R D
ms-deprecated.php	21.2K	V E R D
ms-files.php	2.8K	V E R D
ms-functions.php	89.7K	V E R D
ms-load.php	19.6K	V E R D
ms-network.php	3.7K	V E R D
ms-settings.php	4.1K	V E R D
ms-site.php	40.8K	V E R D
nav-menu-template.php	25.4K	V E R D
nav-menu.php	43.2K	V E R D
option.php	102.6K	V E R D
pluggable-deprecated.php	6.2K	V E R D
post-formats.php	6.9K	V E R D
post-template.php	67K	V E R D
post-thumbnail-template.php	10.6K	V E R D
post.php	289.6K	V E R D
registration-functions.php	200	V E R D
registration.php	200	V E R D
rest-api.php	98.8K	V E R D
revision.php	30K	V E R D
rewrite.php	19K	V E R D
robots-template.php	5.1K	V E R D
rss-functions.php	255	V E R D
rss.php	22.7K	V E R D
script-loader.php	159.3K	V E R D
script-modules.php	11.7K	V E R D
sitemaps.php	3.2K	V E R D
speculative-loading.php	8.4K	V E R D
spl-autoload-compat.php	441	V E R D
style-engine.php	7.4K	V E R D
taxonomy.php	173K	V E R D
template-canvas.php	544	V E R D
template-loader.php	4.2K	V E R D
template.php	36K	V E R D
theme-i18n.json	1.8K	V E R D
theme-previews.php	2.8K	V E R D
theme-templates.php	4K	V E R D
theme.json	8.8K	V E R D
update.php	37.4K	V E R D
user.php	174.6K	V E R D
utf8.php	7.1K	V E R D
vars.php	6.5K	V E R D
version.php	1.1K	V E R D
view-transitions.php	602	V E R D
wp-db.php	445	V E R D
wp-diff.php	799	V E R D