<?php

/**

 * The block editor page.

 *

 * @since 5.0.0

 *

 * @package WordPress

 * @subpackage Administration

 */

// Don't load directly.

if ( ! defined( 'ABSPATH' ) ) {

	die( '-1' );

}

/**

 * @global string       $post_type        Global post type.

 * @global WP_Post_Type $post_type_object Global post type object.

 * @global WP_Post      $post             Global post object.

 * @global string       $title            The title of the current screen.

 * @global array        $wp_meta_boxes    Global meta box state.

 */

global $post_type, $post_type_object, $post, $title, $wp_meta_boxes;

$block_editor_context = new WP_Block_Editor_Context( array( 'post' => $post ) );

// Flag that we're loading the block editor.

$current_screen = get_current_screen();

$current_screen->is_block_editor( true );

// Default to is-fullscreen-mode to avoid jumps in the UI.

add_filter(

	'admin_body_class',

	static function ( $classes ) {

		return "$classes is-fullscreen-mode";

	}

);

/*

 * Emoji replacement is disabled for now, until it plays nicely with React.

 */

remove_action( 'admin_print_scripts', 'print_emoji_detection_script' );

/*

 * Block editor implements its own Options menu for toggling Document Panels.

 */

add_filter( 'screen_options_show_screen', '__return_false' );

wp_enqueue_script( 'heartbeat' );

wp_enqueue_script( 'wp-edit-post' );

$rest_path = rest_get_route_for_post( $post );

$active_theme                   = get_stylesheet();

$global_styles_endpoint_context = current_user_can( 'edit_theme_options' ) ? 'edit' : 'view';

$template_lookup_slug           = 'page' === $post->post_type ? 'page' : 'single-' . $post->post_type;

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

	$template_lookup_slug .= '-' . $post->post_name;

}

// Preload common data.

$preload_paths = array(

	'/wp/v2/types?context=view',

	'/wp/v2/taxonomies?context=view',

	add_query_arg( 'context', 'edit', $rest_path ),

	sprintf( '/wp/v2/types/%s?context=edit', $post_type ),

	'/wp/v2/users/me',

	array( rest_get_route_for_post_type_items( 'attachment' ), 'OPTIONS' ),

	array( rest_get_route_for_post_type_items( 'page' ), 'OPTIONS' ),

	array( rest_get_route_for_post_type_items( 'wp_block' ), 'OPTIONS' ),

	array( rest_get_route_for_post_type_items( 'wp_template' ), 'OPTIONS' ),

	sprintf( '%s/autosaves?context=edit', $rest_path ),

	'/wp/v2/settings',

	array( '/wp/v2/settings', 'OPTIONS' ),

	'/wp/v2/global-styles/themes/' . $active_theme . '?context=view',

	'/wp/v2/global-styles/themes/' . $active_theme . '/variations?context=view',

	'/wp/v2/themes?context=edit&status=active',

	array( '/wp/v2/global-styles/' . WP_Theme_JSON_Resolver::get_user_global_styles_post_id(), 'OPTIONS' ),

	/*

	 * Preload the global styles path with the correct context based on user caps.

	 * NOTE: There is an equivalent conditional check in the client-side code to fetch

	 * the global styles entity using the appropriate context value.

	 * See the call to `canUser()`, under `useGlobalStylesUserConfig()` in `packages/edit-site/src/components/use-global-styles-user-config/index.js`.

	 * Please ensure that the equivalent check is kept in sync with this preload path.

	 */

	'/wp/v2/global-styles/' . WP_Theme_JSON_Resolver::get_user_global_styles_post_id() . '?context=' . $global_styles_endpoint_context,

	// Used by getBlockPatternCategories in useBlockEditorSettings.

	'/wp/v2/block-patterns/categories',

	// @see packages/core-data/src/entities.js

	'/?_fields=' . implode(

		',',

		array(

			'description',

			'gmt_offset',

			'home',

			'name',

			'site_icon',

			'site_icon_url',

			'site_logo',

			'timezone_string',

			'url',

			'page_for_posts',

			'page_on_front',

			'show_on_front',

		)

	),

	$paths[] = add_query_arg(

		'slug',

		// @see https://github.com/WordPress/gutenberg/blob/e093fefd041eb6cc4a4e7f67b92ab54fd75c8858/packages/core-data/src/private-selectors.ts#L244-L254

		$template_lookup_slug,

		'/wp/v2/templates/lookup'

	),

);

block_editor_rest_api_preload( $preload_paths, $block_editor_context );

wp_add_inline_script(

	'wp-blocks',

	sprintf( 'wp.blocks.setCategories( %s );', wp_json_encode( get_block_categories( $post ) ) ),

	'after'

);

/*

 * Assign initial edits, if applicable. These are not initially assigned to the persisted post,

 * but should be included in its save payload.

 */

$initial_edits = array();

$is_new_post   = false;

if ( 'auto-draft' === $post->post_status ) {

	$is_new_post = true;

	// Override "(Auto Draft)" new post default title with empty string, or filtered value.

	if ( post_type_supports( $post->post_type, 'title' ) ) {

		$initial_edits['title'] = $post->post_title;

	}

	if ( post_type_supports( $post->post_type, 'editor' ) ) {

		$initial_edits['content'] = $post->post_content;

	}

	if ( post_type_supports( $post->post_type, 'excerpt' ) ) {

		$initial_edits['excerpt'] = $post->post_excerpt;

	}

}

// Preload server-registered block schemas.

wp_add_inline_script(

	'wp-blocks',

	'wp.blocks.unstable__bootstrapServerSideBlockDefinitions(' . wp_json_encode( get_block_editor_server_block_settings() ) . ');'

);

// Preload server-registered block bindings sources.

$registered_sources = get_all_registered_block_bindings_sources();

if ( ! empty( $registered_sources ) ) {

	$filtered_sources = array();

	foreach ( $registered_sources as $source ) {

		$filtered_sources[] = array(

			'name'        => $source->name,

			'label'       => $source->label,

			'usesContext' => $source->uses_context,

		);

	}

	$script = sprintf( 'for ( const source of %s ) { wp.blocks.registerBlockBindingsSource( source ); }', wp_json_encode( $filtered_sources ) );

	wp_add_inline_script(

		'wp-blocks',

		$script

	);

}

// Get admin url for handling meta boxes.

$meta_box_url = admin_url( 'post.php' );

$meta_box_url = add_query_arg(

	array(

		'post'                  => $post->ID,

		'action'                => 'edit',

		'meta-box-loader'       => true,

		'meta-box-loader-nonce' => wp_create_nonce( 'meta-box-loader' ),

	),

	$meta_box_url

);

wp_add_inline_script(

	'wp-editor',

	sprintf( 'var _wpMetaBoxUrl = %s;', wp_json_encode( $meta_box_url ) ),

	'before'

);

// Set Heartbeat interval to 10 seconds, used to refresh post locks.

wp_add_inline_script(

	'heartbeat',

	'jQuery( function() {

		wp.heartbeat.interval( 10 );

	} );',

	'after'

);

/*

 * Get all available templates for the post/page attributes meta-box.

 * The "Default template" array element should only be added if the array is

 * not empty so we do not trigger the template select element without any options

 * besides the default value.

 */

$available_templates = wp_get_theme()->get_page_templates( get_post( $post->ID ) );

$available_templates = ! empty( $available_templates ) ? array_replace(

	array(

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

		'' => apply_filters( 'default_page_template_title', __( 'Default template' ), 'rest-api' ),

	),

	$available_templates

) : $available_templates;

// Lock settings.

$user_id = wp_check_post_lock( $post->ID );

if ( $user_id ) {

	$locked = false;

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

	if ( apply_filters( 'show_post_locked_dialog', true, $post, $user_id ) ) {

		$locked = true;

	}

	$user_details = null;

	if ( $locked ) {

		$user         = get_userdata( $user_id );

		$user_details = array(

			'name' => $user->display_name,

		);

		if ( get_option( 'show_avatars' ) ) {

			$user_details['avatar'] = get_avatar_url( $user_id, array( 'size' => 128 ) );

		}

	}

	$lock_details = array(

		'isLocked' => $locked,

		'user'     => $user_details,

	);

} else {

	// Lock the post.

	$active_post_lock = wp_set_post_lock( $post->ID );

	if ( $active_post_lock ) {

		$active_post_lock = esc_attr( implode( ':', $active_post_lock ) );

	}

	$lock_details = array(

		'isLocked'       => false,

		'activePostLock' => $active_post_lock,

	);

}

/**

 * Filters the body placeholder text.

 *

 * @since 5.0.0

 * @since 5.8.0 Changed the default placeholder text.

 *

 * @param string  $text Placeholder text. Default 'Type / to choose a block'.

 * @param WP_Post $post Post object.

 */

$body_placeholder = apply_filters( 'write_your_story', __( 'Type / to choose a block' ), $post );

$editor_settings = array(

	'availableTemplates'   => $available_templates,

	'disablePostFormats'   => ! current_theme_supports( 'post-formats' ),

	/** This filter is documented in wp-admin/edit-form-advanced.php */

	'titlePlaceholder'     => apply_filters( 'enter_title_here', __( 'Add title' ), $post ),

	'bodyPlaceholder'      => $body_placeholder,

	'autosaveInterval'     => AUTOSAVE_INTERVAL,

	'richEditingEnabled'   => user_can_richedit(),

	'postLock'             => $lock_details,

	'postLockUtils'        => array(

		'nonce'       => wp_create_nonce( 'lock-post_' . $post->ID ),

		'unlockNonce' => wp_create_nonce( 'update-post_' . $post->ID ),

		'ajaxUrl'     => admin_url( 'admin-ajax.php' ),

	),

	'supportsLayout'       => wp_theme_has_theme_json(),

	'supportsTemplateMode' => current_theme_supports( 'block-templates' ),

	// Whether or not to load the 'postcustom' meta box is stored as a user meta

	// field so that we're not always loading its assets.

	'enableCustomFields'   => (bool) get_user_meta( get_current_user_id(), 'enable_custom_fields', true ),

);

// Add additional back-compat patterns registered by `current_screen` et al.

$editor_settings['__experimentalAdditionalBlockPatterns']          = WP_Block_Patterns_Registry::get_instance()->get_all_registered( true );

$editor_settings['__experimentalAdditionalBlockPatternCategories'] = WP_Block_Pattern_Categories_Registry::get_instance()->get_all_registered( true );

$autosave = wp_get_post_autosave( $post->ID );

if ( $autosave ) {

	if ( mysql2date( 'U', $autosave->post_modified_gmt, false ) > mysql2date( 'U', $post->post_modified_gmt, false ) ) {

		$editor_settings['autosave'] = array(

			'editLink' => get_edit_post_link( $autosave->ID ),

		);

	} else {

		wp_delete_post_revision( $autosave->ID );

	}

}

if ( ! empty( $post_type_object->template ) ) {

	$editor_settings['template']     = $post_type_object->template;

	$editor_settings['templateLock'] = ! empty( $post_type_object->template_lock ) ? $post_type_object->template_lock : false;

}

// If there's no template set on a new post, use the post format, instead.

if ( $is_new_post && ! isset( $editor_settings['template'] ) && 'post' === $post->post_type ) {

	$post_format = get_post_format( $post );

	if ( in_array( $post_format, array( 'audio', 'gallery', 'image', 'quote', 'video' ), true ) ) {

		$editor_settings['template'] = array( array( "core/$post_format" ) );

	}

}

if ( wp_is_block_theme() && $editor_settings['supportsTemplateMode'] ) {

	$editor_settings['defaultTemplatePartAreas'] = get_allowed_block_template_part_areas();

}

/**

 * Scripts

 */

wp_enqueue_media(

	array(

		'post' => $post->ID,

	)

);

wp_tinymce_inline_scripts();

wp_enqueue_editor();

/**

 * Styles

 */

wp_enqueue_style( 'wp-edit-post' );

/**

 * Fires after block assets have been enqueued for the editing interface.

 *

 * Call `add_action` on any hook before 'admin_enqueue_scripts'.

 *

 * In the function call you supply, simply use `wp_enqueue_script` and

 * `wp_enqueue_style` to add your functionality to the block editor.

 *

 * @since 5.0.0

 */

do_action( 'enqueue_block_editor_assets' );

// In order to duplicate classic meta box behavior, we need to run the classic meta box actions.

require_once ABSPATH . 'wp-admin/includes/meta-boxes.php';

register_and_do_post_meta_boxes( $post );

// Check if the Custom Fields meta box has been removed at some point.

$core_meta_boxes = $wp_meta_boxes[ $current_screen->id ]['normal']['core'];

if ( ! isset( $core_meta_boxes['postcustom'] ) || ! $core_meta_boxes['postcustom'] ) {

	unset( $editor_settings['enableCustomFields'] );

}

$editor_settings = get_block_editor_settings( $editor_settings, $block_editor_context );

$init_script = <<<JS

( function() {

	window._wpLoadBlockEditor = new Promise( function( resolve ) {

		wp.domReady( function() {

			resolve( wp.editPost.initializeEditor( 'editor', "%s", %d, %s, %s ) );

		} );

	} );

} )();

JS;

$script = sprintf(

	$init_script,

	$post->post_type,

	$post->ID,

	wp_json_encode( $editor_settings ),

	wp_json_encode( $initial_edits )

);

wp_add_inline_script( 'wp-edit-post', $script );

if ( (int) get_option( 'page_for_posts' ) === $post->ID ) {

	add_action( 'admin_enqueue_scripts', '_wp_block_editor_posts_page_notice' );

}

require_once ABSPATH . 'wp-admin/admin-header.php';

?>

<div class="block-editor">

	<h1 class="screen-reader-text hide-if-no-js"><?php echo esc_html( $title ); ?></h1>

	<div id="editor" class="block-editor__container hide-if-no-js"></div>

	<div id="metaboxes" class="hidden">

		<?php the_block_editor_meta_boxes(); ?>

	</div>

	<?php // JavaScript is disabled. ?>

	<div class="wrap hide-if-js block-editor-no-js">

		<h1 class="wp-heading-inline"><?php echo esc_html( $title ); ?></h1>

		<?php

		if ( file_exists( WP_PLUGIN_DIR . '/classic-editor/classic-editor.php' ) ) {

			// If Classic Editor is already installed, provide a link to activate the plugin.

			$installed           = true;

			$plugin_activate_url = wp_nonce_url( 'plugins.php?action=activate&plugin=classic-editor/classic-editor.php', 'activate-plugin_classic-editor/classic-editor.php' );

			$message             = sprintf(

				/* translators: %s: Link to activate the Classic Editor plugin. */

				__( 'The block editor requires JavaScript. Please enable JavaScript in your browser settings, or activate the <a href="%s">Classic Editor plugin</a>.' ),

				esc_url( $plugin_activate_url )

			);

		} else {

			// If Classic Editor is not installed, provide a link to install it.

			$installed          = false;

			$plugin_install_url = wp_nonce_url( self_admin_url( 'update.php?action=install-plugin&plugin=classic-editor' ), 'install-plugin_classic-editor' );

			$message            = sprintf(

				/* translators: %s: Link to install the Classic Editor plugin. */

				__( 'The block editor requires JavaScript. Please enable JavaScript in your browser settings, or install the <a href="%s">Classic Editor plugin</a>.' ),

				esc_url( $plugin_install_url )

			);

		}

		/**

		 * Filters the message displayed in the block editor interface when JavaScript is

		 * not enabled in the browser.

		 *

		 * @since 5.0.3

		 * @since 6.4.0 Added `$installed` parameter.