<?php

/**

 * Block Editor API.

 *

 * @package WordPress

 * @subpackage Editor

 * @since 5.8.0

 */

/**

 * Returns the list of default categories for block types.

 *

 * @since 5.8.0

 * @since 6.3.0 Reusable Blocks renamed to Patterns.

 *

 * @return array[] Array of categories for block types.

 */

function get_default_block_categories() {

	return array(

		array(

			'slug'  => 'text',

			'title' => _x( 'Text', 'block category' ),

			'icon'  => null,

		),

		array(

			'slug'  => 'media',

			'title' => _x( 'Media', 'block category' ),

			'icon'  => null,

		),

		array(

			'slug'  => 'design',

			'title' => _x( 'Design', 'block category' ),

			'icon'  => null,

		),

		array(

			'slug'  => 'widgets',

			'title' => _x( 'Widgets', 'block category' ),

			'icon'  => null,

		),

		array(

			'slug'  => 'theme',

			'title' => _x( 'Theme', 'block category' ),

			'icon'  => null,

		),

		array(

			'slug'  => 'embed',

			'title' => _x( 'Embeds', 'block category' ),

			'icon'  => null,

		),

		array(

			'slug'  => 'reusable',

			'title' => _x( 'Patterns', 'block category' ),

			'icon'  => null,

		),

	);

}

/**

 * Returns all the categories for block types that will be shown in the block editor.

 *

 * @since 5.0.0

 * @since 5.8.0 It is possible to pass the block editor context as param.

 *

 * @param WP_Post|WP_Block_Editor_Context $post_or_block_editor_context The current post object or

 *                                                                      the block editor context.

 *

 * @return array[] Array of categories for block types.

 */

function get_block_categories( $post_or_block_editor_context ) {

	$block_categories     = get_default_block_categories();

	$block_editor_context = $post_or_block_editor_context instanceof WP_Post ?

		new WP_Block_Editor_Context(

			array(

				'post' => $post_or_block_editor_context,

			)

		) : $post_or_block_editor_context;

	/**

	 * Filters the default array of categories for block types.

	 *

	 * @since 5.8.0

	 *

	 * @param array[]                 $block_categories     Array of categories for block types.

	 * @param WP_Block_Editor_Context $block_editor_context The current block editor context.

	 */

	$block_categories = apply_filters( 'block_categories_all', $block_categories, $block_editor_context );

	if ( ! empty( $block_editor_context->post ) ) {

		$post = $block_editor_context->post;

		/**

		 * Filters the default array of categories for block types.

		 *

		 * @since 5.0.0

		 * @deprecated 5.8.0 Use the {@see 'block_categories_all'} filter instead.

		 *

		 * @param array[] $block_categories Array of categories for block types.

		 * @param WP_Post $post             Post being loaded.

		 */

		$block_categories = apply_filters_deprecated( 'block_categories', array( $block_categories, $post ), '5.8.0', 'block_categories_all' );

	}

	return $block_categories;

}

/**

 * Gets the list of allowed block types to use in the block editor.

 *

 * @since 5.8.0

 *

 * @param WP_Block_Editor_Context $block_editor_context The current block editor context.

 *

 * @return bool|string[] Array of block type slugs, or boolean to enable/disable all.

 */

function get_allowed_block_types( $block_editor_context ) {

	$allowed_block_types = true;

	/**

	 * Filters the allowed block types for all editor types.

	 *

	 * @since 5.8.0

	 *

	 * @param bool|string[]           $allowed_block_types  Array of block type slugs, or boolean to enable/disable all.

	 *                                                      Default true (all registered block types supported).

	 * @param WP_Block_Editor_Context $block_editor_context The current block editor context.

	 */

	$allowed_block_types = apply_filters( 'allowed_block_types_all', $allowed_block_types, $block_editor_context );

	if ( ! empty( $block_editor_context->post ) ) {

		$post = $block_editor_context->post;

		/**

		 * Filters the allowed block types for the editor.

		 *

		 * @since 5.0.0

		 * @deprecated 5.8.0 Use the {@see 'allowed_block_types_all'} filter instead.

		 *

		 * @param bool|string[] $allowed_block_types Array of block type slugs, or boolean to enable/disable all.

		 *                                           Default true (all registered block types supported)

		 * @param WP_Post       $post                The post resource data.

		 */

		$allowed_block_types = apply_filters_deprecated( 'allowed_block_types', array( $allowed_block_types, $post ), '5.8.0', 'allowed_block_types_all' );

	}

	return $allowed_block_types;

}

/**

 * Returns the default block editor settings.

 *

 * @since 5.8.0

 *

 * @return array The default block editor settings.

 */

function get_default_block_editor_settings() {

	// Media settings.

	// wp_max_upload_size() can be expensive, so only call it when relevant for the current user.

	$max_upload_size = 0;

	if ( current_user_can( 'upload_files' ) ) {

		$max_upload_size = wp_max_upload_size();

		if ( ! $max_upload_size ) {

			$max_upload_size = 0;

		}

	}

	/** This filter is documented in wp-admin/includes/media.php */

	$image_size_names = apply_filters(

		'image_size_names_choose',

		array(

			'thumbnail' => __( 'Thumbnail' ),

			'medium'    => __( 'Medium' ),

			'large'     => __( 'Large' ),

			'full'      => __( 'Full Size' ),

		)

	);

	$available_image_sizes = array();

	foreach ( $image_size_names as $image_size_slug => $image_size_name ) {

		$available_image_sizes[] = array(

			'slug' => $image_size_slug,

			'name' => $image_size_name,

		);

	}

	$default_size       = get_option( 'image_default_size', 'large' );

	$image_default_size = in_array( $default_size, array_keys( $image_size_names ), true ) ? $default_size : 'large';

	$image_dimensions = array();

	$all_sizes        = wp_get_registered_image_subsizes();

	foreach ( $available_image_sizes as $size ) {

		$key = $size['slug'];

		if ( isset( $all_sizes[ $key ] ) ) {

			$image_dimensions[ $key ] = $all_sizes[ $key ];

		}

	}

	// These styles are used if the "no theme styles" options is triggered or on

	// themes without their own editor styles.

	$default_editor_styles_file = ABSPATH . WPINC . '/css/dist/block-editor/default-editor-styles.css';

	static $default_editor_styles_file_contents = false;

	if ( ! $default_editor_styles_file_contents && file_exists( $default_editor_styles_file ) ) {

		$default_editor_styles_file_contents = file_get_contents( $default_editor_styles_file );

	}

	$default_editor_styles = array();

	if ( $default_editor_styles_file_contents ) {

		$default_editor_styles = array(

			array( 'css' => $default_editor_styles_file_contents ),

		);

	}

	$editor_settings = array(

		'alignWide'                        => get_theme_support( 'align-wide' ),

		'allowedBlockTypes'                => true,

		'allowedMimeTypes'                 => get_allowed_mime_types(),

		'defaultEditorStyles'              => $default_editor_styles,

		'blockCategories'                  => get_default_block_categories(),

		'isRTL'                            => is_rtl(),

		'imageDefaultSize'                 => $image_default_size,

		'imageDimensions'                  => $image_dimensions,

		'imageEditing'                     => true,

		'imageSizes'                       => $available_image_sizes,

		'maxUploadFileSize'                => $max_upload_size,

		'__experimentalDashboardLink'      => admin_url( '/' ),

		// The following flag is required to enable the new Gallery block format on the mobile apps in 5.9.

		'__unstableGalleryWithImageBlocks' => true,

	);

	$theme_settings = get_classic_theme_supports_block_editor_settings();

	foreach ( $theme_settings as $key => $value ) {

		$editor_settings[ $key ] = $value;

	}

	return $editor_settings;

}

/**

 * Returns the block editor settings needed to use the Legacy Widget block which

 * is not registered by default.

 *

 * @since 5.8.0

 *

 * @return array Settings to be used with get_block_editor_settings().

 */

function get_legacy_widget_block_editor_settings() {

	$editor_settings = array();

	/**

	 * Filters the list of widget-type IDs that should **not** be offered by the

	 * Legacy Widget block.

	 *

	 * Returning an empty array will make all widgets available.

	 *

	 * @since 5.8.0

	 *

	 * @param string[] $widgets An array of excluded widget-type IDs.

	 */

	$editor_settings['widgetTypesToHideFromLegacyWidgetBlock'] = apply_filters(

		'widget_types_to_hide_from_legacy_widget_block',

		array(

			'pages',

			'calendar',

			'archives',

			'media_audio',

			'media_image',

			'media_gallery',

			'media_video',

			'search',

			'text',

			'categories',

			'recent-posts',

			'recent-comments',

			'rss',

			'tag_cloud',

			'custom_html',

			'block',

		)

	);

	return $editor_settings;

}

/**

 * Collect the block editor assets that need to be loaded into the editor's iframe.

 *

 * @since 6.0.0

 * @access private

 *

 * @global WP_Styles  $wp_styles  The WP_Styles current instance.

 * @global WP_Scripts $wp_scripts The WP_Scripts current instance.

 *

 * @return array {

 *     The block editor assets.

 *

 *     @type string|false $styles  String containing the HTML for styles.

 *     @type string|false $scripts String containing the HTML for scripts.

 * }

 */

function _wp_get_iframed_editor_assets() {

	global $wp_styles, $wp_scripts;

	// Keep track of the styles and scripts instance to restore later.

	$current_wp_styles  = $wp_styles;

	$current_wp_scripts = $wp_scripts;

	// Create new instances to collect the assets.

	$wp_styles  = new WP_Styles();

	$wp_scripts = new WP_Scripts();

	/*

	 * Register all currently registered styles and scripts. The actions that

	 * follow enqueue assets, but don't necessarily register them.

	 */

	$wp_styles->registered  = $current_wp_styles->registered;

	$wp_scripts->registered = $current_wp_scripts->registered;

	/*

	 * We generally do not need reset styles for the iframed editor.

	 * However, if it's a classic theme, margins will be added to every block,

	 * which is reset specifically for list items, so classic themes rely on

	 * these reset styles.

	 */

	$wp_styles->done =

		wp_theme_has_theme_json() ? array( 'wp-reset-editor-styles' ) : array();

	wp_enqueue_script( 'wp-polyfill' );

	// Enqueue the `editorStyle` handles for all core block, and dependencies.

	wp_enqueue_style( 'wp-edit-blocks' );

	if ( current_theme_supports( 'wp-block-styles' ) ) {

		wp_enqueue_style( 'wp-block-library-theme' );

	}

	/*

	 * We don't want to load EDITOR scripts in the iframe, only enqueue

	 * front-end assets for the content.

	 */

	add_filter( 'should_load_block_editor_scripts_and_styles', '__return_false' );

	do_action( 'enqueue_block_assets' );

	remove_filter( 'should_load_block_editor_scripts_and_styles', '__return_false' );

	$block_registry = WP_Block_Type_Registry::get_instance();

	/*

	 * Additionally, do enqueue `editorStyle` assets for all blocks, which

	 * contains editor-only styling for blocks (editor content).

	 */

	foreach ( $block_registry->get_all_registered() as $block_type ) {

		if ( isset( $block_type->editor_style_handles ) && is_array( $block_type->editor_style_handles ) ) {

			foreach ( $block_type->editor_style_handles as $style_handle ) {

				wp_enqueue_style( $style_handle );

			}

		}

	}

	/**

	 * Remove the deprecated `print_emoji_styles` handler.

	 * It avoids breaking style generation with a deprecation message.

	 */

	$has_emoji_styles = has_action( 'wp_print_styles', 'print_emoji_styles' );

	if ( $has_emoji_styles ) {

		remove_action( 'wp_print_styles', 'print_emoji_styles' );

	}

	ob_start();

	wp_print_styles();

	wp_print_font_faces();

	wp_print_font_faces_from_style_variations();

	$styles = ob_get_clean();

	if ( $has_emoji_styles ) {

		add_action( 'wp_print_styles', 'print_emoji_styles' );

	}

	ob_start();

	wp_print_head_scripts();

	wp_print_footer_scripts();

	$scripts = ob_get_clean();

	// Restore the original instances.

	$wp_styles  = $current_wp_styles;

	$wp_scripts = $current_wp_scripts;

	return array(

		'styles'  => $styles,

		'scripts' => $scripts,

	);

}

/**

 * Finds the first occurrence of a specific block in an array of blocks.

 *

 * @since 6.3.0

 *

 * @param array  $blocks     Array of blocks.

 * @param string $block_name Name of the block to find.

 * @return array Found block, or empty array if none found.

 */

function wp_get_first_block( $blocks, $block_name ) {

	foreach ( $blocks as $block ) {

		if ( $block_name === $block['blockName'] ) {

			return $block;

		}

		if ( ! empty( $block['innerBlocks'] ) ) {

			$found_block = wp_get_first_block( $block['innerBlocks'], $block_name );

			if ( ! empty( $found_block ) ) {

				return $found_block;

			}

		}

	}

	return array();

}

/**

 * Retrieves Post Content block attributes from the current post template.

 *

 * @since 6.3.0

 * @since 6.4.0 Return null if there is no post content block.

 * @access private

 *

 * @global int $post_ID

 *

 * @return array|null Post Content block attributes array or null if Post Content block doesn't exist.

 */

function wp_get_post_content_block_attributes() {

	global $post_ID;

	$is_block_theme = wp_is_block_theme();

	if ( ! $is_block_theme || ! $post_ID ) {

		return null;

	}