File "ms-site.php"

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<?php
/**
 * Site API
 *
 * @package WordPress
 * @subpackage Multisite
 * @since 5.1.0
 */

/**
 * Inserts a new site into the database.
 *
 * @since 5.1.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param array $data {
 *     Data for the new site that should be inserted.
 *
 *     @type string $domain       Site domain. Default empty string.
 *     @type string $path         Site path. Default '/'.
 *     @type int    $network_id   The site's network ID. Default is the current network ID.
 *     @type string $registered   When the site was registered, in SQL datetime format. Default is
 *                                the current time.
 *     @type string $last_updated When the site was last updated, in SQL datetime format. Default is
 *                                the value of $registered.
 *     @type int    $public       Whether the site is public. Default 1.
 *     @type int    $archived     Whether the site is archived. Default 0.
 *     @type int    $mature       Whether the site is mature. Default 0.
 *     @type int    $spam         Whether the site is spam. Default 0.
 *     @type int    $deleted      Whether the site is deleted. Default 0.
 *     @type int    $lang_id      The site's language ID. Currently unused. Default 0.
 *     @type int    $user_id      User ID for the site administrator. Passed to the
 *                                `wp_initialize_site` hook.
 *     @type string $title        Site title. Default is 'Site %d' where %d is the site ID. Passed
 *                                to the `wp_initialize_site` hook.
 *     @type array  $options      Custom option $key => $value pairs to use. Default empty array. Passed
 *                                to the `wp_initialize_site` hook.
 *     @type array  $meta         Custom site metadata $key => $value pairs to use. Default empty array.
 *                                Passed to the `wp_initialize_site` hook.
 * }
 * @return int|WP_Error The new site's ID on success, or error object on failure.
 */
function wp_insert_site( array $data ) {
	global $wpdb;

	$now = current_time( 'mysql', true );

	$defaults = array(
		'domain'       => '',
		'path'         => '/',
		'network_id'   => get_current_network_id(),
		'registered'   => $now,
		'last_updated' => $now,
		'public'       => 1,
		'archived'     => 0,
		'mature'       => 0,
		'spam'         => 0,
		'deleted'      => 0,
		'lang_id'      => 0,
	);

	$prepared_data = wp_prepare_site_data( $data, $defaults );
	if ( is_wp_error( $prepared_data ) ) {
		return $prepared_data;
	}

	if ( false === $wpdb->insert( $wpdb->blogs, $prepared_data ) ) {
		return new WP_Error( 'db_insert_error', __( 'Could not insert site into the database.' ), $wpdb->last_error );
	}

	$site_id = (int) $wpdb->insert_id;

	clean_blog_cache( $site_id );

	$new_site = get_site( $site_id );

	if ( ! $new_site ) {
		return new WP_Error( 'get_site_error', __( 'Could not retrieve site data.' ) );
	}

	/**
	 * Fires once a site has been inserted into the database.
	 *
	 * @since 5.1.0
	 *
	 * @param WP_Site $new_site New site object.
	 */
	do_action( 'wp_insert_site', $new_site );

	// Extract the passed arguments that may be relevant for site initialization.
	$args = array_diff_key( $data, $defaults );
	if ( isset( $args['site_id'] ) ) {
		unset( $args['site_id'] );
	}

	/**
	 * Fires when a site's initialization routine should be executed.
	 *
	 * @since 5.1.0
	 *
	 * @param WP_Site $new_site New site object.
	 * @param array   $args     Arguments for the initialization.
	 */
	do_action( 'wp_initialize_site', $new_site, $args );

	// Only compute extra hook parameters if the deprecated hook is actually in use.
	if ( has_action( 'wpmu_new_blog' ) ) {
		$user_id = ! empty( $args['user_id'] ) ? $args['user_id'] : 0;
		$meta    = ! empty( $args['options'] ) ? $args['options'] : array();

		// WPLANG was passed with `$meta` to the `wpmu_new_blog` hook prior to 5.1.0.
		if ( ! array_key_exists( 'WPLANG', $meta ) ) {
			$meta['WPLANG'] = get_network_option( $new_site->network_id, 'WPLANG' );
		}

		/*
		 * Rebuild the data expected by the `wpmu_new_blog` hook prior to 5.1.0 using allowed keys.
		 * The `$allowed_data_fields` matches the one used in `wpmu_create_blog()`.
		 */
		$allowed_data_fields = array( 'public', 'archived', 'mature', 'spam', 'deleted', 'lang_id' );
		$meta                = array_merge( array_intersect_key( $data, array_flip( $allowed_data_fields ) ), $meta );

		/**
		 * Fires immediately after a new site is created.
		 *
		 * @since MU (3.0.0)
		 * @deprecated 5.1.0 Use {@see 'wp_initialize_site'} instead.
		 *
		 * @param int    $site_id    Site ID.
		 * @param int    $user_id    User ID.
		 * @param string $domain     Site domain.
		 * @param string $path       Site path.
		 * @param int    $network_id Network ID. Only relevant on multi-network installations.
		 * @param array  $meta       Meta data. Used to set initial site options.
		 */
		do_action_deprecated(
			'wpmu_new_blog',
			array( $new_site->id, $user_id, $new_site->domain, $new_site->path, $new_site->network_id, $meta ),
			'5.1.0',
			'wp_initialize_site'
		);
	}

	return (int) $new_site->id;
}

/**
 * Updates a site in the database.
 *
 * @since 5.1.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param int   $site_id ID of the site that should be updated.
 * @param array $data    Site data to update. See {@see wp_insert_site()} for the list of supported keys.
 * @return int|WP_Error The updated site's ID on success, or error object on failure.
 */
function wp_update_site( $site_id, array $data ) {
	global $wpdb;

	if ( empty( $site_id ) ) {
		return new WP_Error( 'site_empty_id', __( 'Site ID must not be empty.' ) );
	}

	$old_site = get_site( $site_id );
	if ( ! $old_site ) {
		return new WP_Error( 'site_not_exist', __( 'Site does not exist.' ) );
	}

	$defaults                 = $old_site->to_array();
	$defaults['network_id']   = (int) $defaults['site_id'];
	$defaults['last_updated'] = current_time( 'mysql', true );
	unset( $defaults['blog_id'], $defaults['site_id'] );

	$data = wp_prepare_site_data( $data, $defaults, $old_site );
	if ( is_wp_error( $data ) ) {
		return $data;
	}

	if ( false === $wpdb->update( $wpdb->blogs, $data, array( 'blog_id' => $old_site->id ) ) ) {
		return new WP_Error( 'db_update_error', __( 'Could not update site in the database.' ), $wpdb->last_error );
	}

	clean_blog_cache( $old_site );

	$new_site = get_site( $old_site->id );

	/**
	 * Fires once a site has been updated in the database.
	 *
	 * @since 5.1.0
	 *
	 * @param WP_Site $new_site New site object.
	 * @param WP_Site $old_site Old site object.
	 */
	do_action( 'wp_update_site', $new_site, $old_site );

	return (int) $new_site->id;
}

/**
 * Deletes a site from the database.
 *
 * @since 5.1.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param int $site_id ID of the site that should be deleted.
 * @return WP_Site|WP_Error The deleted site object on success, or error object on failure.
 */
function wp_delete_site( $site_id ) {
	global $wpdb;

	if ( empty( $site_id ) ) {
		return new WP_Error( 'site_empty_id', __( 'Site ID must not be empty.' ) );
	}

	$old_site = get_site( $site_id );
	if ( ! $old_site ) {
		return new WP_Error( 'site_not_exist', __( 'Site does not exist.' ) );
	}

	$errors = new WP_Error();

	/**
	 * Fires before a site should be deleted from the database.
	 *
	 * Plugins should amend the `$errors` object via its `WP_Error::add()` method. If any errors
	 * are present, the site will not be deleted.
	 *
	 * @since 5.1.0
	 *
	 * @param WP_Error $errors   Error object to add validation errors to.
	 * @param WP_Site  $old_site The site object to be deleted.
	 */
	do_action( 'wp_validate_site_deletion', $errors, $old_site );

	if ( ! empty( $errors->errors ) ) {
		return $errors;
	}

	/**
	 * Fires before a site is deleted.
	 *
	 * @since MU (3.0.0)
	 * @deprecated 5.1.0
	 *
	 * @param int  $site_id The site ID.
	 * @param bool $drop    True if site's table should be dropped. Default false.
	 */
	do_action_deprecated( 'delete_blog', array( $old_site->id, true ), '5.1.0' );

	/**
	 * Fires when a site's uninitialization routine should be executed.
	 *
	 * @since 5.1.0
	 *
	 * @param WP_Site $old_site Deleted site object.
	 */
	do_action( 'wp_uninitialize_site', $old_site );

	if ( is_site_meta_supported() ) {
		$blog_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->blogmeta WHERE blog_id = %d ", $old_site->id ) );
		foreach ( $blog_meta_ids as $mid ) {
			delete_metadata_by_mid( 'blog', $mid );
		}
	}

	if ( false === $wpdb->delete( $wpdb->blogs, array( 'blog_id' => $old_site->id ) ) ) {
		return new WP_Error( 'db_delete_error', __( 'Could not delete site from the database.' ), $wpdb->last_error );
	}

	clean_blog_cache( $old_site );

	/**
	 * Fires once a site has been deleted from the database.
	 *
	 * @since 5.1.0
	 *
	 * @param WP_Site $old_site Deleted site object.
	 */
	do_action( 'wp_delete_site', $old_site );

	/**
	 * Fires after the site is deleted from the network.
	 *
	 * @since 4.8.0
	 * @deprecated 5.1.0
	 *
	 * @param int  $site_id The site ID.
	 * @param bool $drop    True if site's tables should be dropped. Default false.
	 */
	do_action_deprecated( 'deleted_blog', array( $old_site->id, true ), '5.1.0' );

	return $old_site;
}

/**
 * Retrieves site data given a site ID or site object.
 *
 * Site data will be cached and returned after being passed through a filter.
 * If the provided site is empty, the current site global will be used.
 *
 * @since 4.6.0
 *
 * @param WP_Site|int|null $site Optional. Site to retrieve. Default is the current site.
 * @return WP_Site|null The site object or null if not found.
 */
function get_site( $site = null ) {
	if ( empty( $site ) ) {
		$site = get_current_blog_id();
	}

	if ( $site instanceof WP_Site ) {
		$_site = $site;
	} elseif ( is_object( $site ) ) {
		$_site = new WP_Site( $site );
	} else {
		$_site = WP_Site::get_instance( $site );
	}

	if ( ! $_site ) {
		return null;
	}

	/**
	 * Fires after a site is retrieved.
	 *
	 * @since 4.6.0
	 *
	 * @param WP_Site $_site Site data.
	 */
	$_site = apply_filters( 'get_site', $_site );

	return $_site;
}

/**
 * Adds any sites from the given IDs to the cache that do not already exist in cache.
 *
 * @since 4.6.0
 * @since 5.1.0 Introduced the `$update_meta_cache` parameter.
 * @since 6.1.0 This function is no longer marked as "private".
 * @since 6.3.0 Use wp_lazyload_site_meta() for lazy-loading of site meta.
 *
 * @see update_site_cache()
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param array $ids               ID list.
 * @param bool  $update_meta_cache Optional. Whether to update the meta cache. Default true.
 */
function _prime_site_caches( $ids, $update_meta_cache = true ) {
	global $wpdb;

	$non_cached_ids = _get_non_cached_ids( $ids, 'sites' );
	if ( ! empty( $non_cached_ids ) ) {
		$fresh_sites = $wpdb->get_results( sprintf( "SELECT * FROM $wpdb->blogs WHERE blog_id IN (%s)", implode( ',', array_map( 'intval', $non_cached_ids ) ) ) ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared

		update_site_cache( $fresh_sites, false );
	}

	if ( $update_meta_cache ) {
		wp_lazyload_site_meta( $ids );
	}
}

/**
 * Queue site meta for lazy-loading.
 *
 * @since 6.3.0
 *
 * @param array $site_ids List of site IDs.
 */
function wp_lazyload_site_meta( array $site_ids ) {
	if ( empty( $site_ids ) ) {
		return;
	}
	$lazyloader = wp_metadata_lazyloader();
	$lazyloader->queue_objects( 'blog', $site_ids );
}

/**
 * Updates sites in cache.
 *
 * @since 4.6.0
 * @since 5.1.0 Introduced the `$update_meta_cache` parameter.
 *
 * @param array $sites             Array of site objects.
 * @param bool  $update_meta_cache Whether to update site meta cache. Default true.
 */
function update_site_cache( $sites, $update_meta_cache = true ) {
	if ( ! $sites ) {
		return;
	}
	$site_ids          = array();
	$site_data         = array();
	$blog_details_data = array();
	foreach ( $sites as $site ) {
		$site_ids[]                                    = $site->blog_id;
		$site_data[ $site->blog_id ]                   = $site;
		$blog_details_data[ $site->blog_id . 'short' ] = $site;

	}
	wp_cache_add_multiple( $site_data, 'sites' );
	wp_cache_add_multiple( $blog_details_data, 'blog-details' );

	if ( $update_meta_cache ) {
		update_sitemeta_cache( $site_ids );
	}
}

/**
 * Updates metadata cache for list of site IDs.
 *
 * Performs SQL query to retrieve all metadata for the sites matching `$site_ids` and stores them in the cache.
 * Subsequent calls to `get_site_meta()` will not need to query the database.
 *
 * @since 5.1.0
 *
 * @param array $site_ids List of site IDs.
 * @return array|false An array of metadata on success, false if there is nothing to update.
 */
function update_sitemeta_cache( $site_ids ) {
	// Ensure this filter is hooked in even if the function is called early.
	if ( ! has_filter( 'update_blog_metadata_cache', 'wp_check_site_meta_support_prefilter' ) ) {
		add_filter( 'update_blog_metadata_cache', 'wp_check_site_meta_support_prefilter' );
	}
	return update_meta_cache( 'blog', $site_ids );
}

/**
 * Retrieves a list of sites matching requested arguments.
 *
 * @since 4.6.0
 * @since 4.8.0 Introduced the 'lang_id', 'lang__in', and 'lang__not_in' parameters.
 *
 * @see WP_Site_Query::parse_query()
 *
 * @param string|array $args Optional. Array or string of arguments. See WP_Site_Query::__construct()
 *                           for information on accepted arguments. Default empty array.
 * @return WP_Site[]|int[]|int List of WP_Site objects, a list of site IDs when 'fields' is set to 'ids',
 *                             or the number of sites when 'count' is passed as a query var.
 */
function get_sites( $args = array() ) {
	$query = new WP_Site_Query();

	return $query->query( $args );
}

/**
 * Prepares site data for insertion or update in the database.
 *
 * @since 5.1.0
 *
 * @param array        $data     Associative array of site data passed to the respective function.
 *                               See {@see wp_insert_site()} for the possibly included data.
 * @param array        $defaults Site data defaults to parse $data against.
 * @param WP_Site|null $old_site Optional. Old site object if an update, or null if an insertion.
 *                               Default null.
 * @return array|WP_Error Site data ready for a database transaction, or WP_Error in case a validation
 *                        error occurred.
 */
function wp_prepare_site_data( $data, $defaults, $old_site = null ) {

	// Maintain backward-compatibility with `$site_id` as network ID.
	if ( isset( $data['site_id'] ) ) {
		if ( ! empty( $data['site_id'] ) && empty( $data['network_id'] ) ) {
			$data['network_id'] = $data['site_id'];
		}
		unset( $data['site_id'] );
	}

	/**
	 * Filters passed site data in order to normalize it.
	 *
	 * @since 5.1.0
	 *
	 * @param array $data Associative array of site data passed to the respective function.
	 *                    See {@see wp_insert_site()} for the possibly included data.
	 */
	$data = apply_filters( 'wp_normalize_site_data', $data );

	$allowed_data_fields = array( 'domain', 'path', 'network_id', 'registered', 'last_updated', 'public', 'archived', 'mature', 'spam', 'deleted', 'lang_id' );
	$data                = array_intersect_key( wp_parse_args( $data, $defaults ), array_flip( $allowed_data_fields ) );

	$errors = new WP_Error();

	/**
	 * Fires when data should be validated for a site prior to inserting or updating in the database.
	 *
	 * Plugins should amend the `$errors` object via its `WP_Error::add()` method.
	 *
	 * @since 5.1.0
	 *
	 * @param WP_Error     $errors   Error object to add validation errors to.
	 * @param array        $data     Associative array of complete site data. See {@see wp_insert_site()}
	 *                               for the included data.
	 * @param WP_Site|null $old_site The old site object if the data belongs to a site being updated,
	 *                               or null if it is a new site being inserted.
	 */
	do_action( 'wp_validate_site_data', $errors, $data, $old_site );

	if ( ! empty( $errors->errors ) ) {
		return $errors;
	}

	// Prepare for database.
	$data['site_id'] = $data['network_id'];
	unset( $data['network_id'] );

	return $data;
}

/**
 * Normalizes data for a site prior to inserting or updating in the database.
 *
 * @since 5.1.0
 *
 * @param array $data Associative array of site data passed to the respective function.
 *                    See {@see wp_insert_site()} for the possibly included data.
 * @return array Normalized site data.
 */
function wp_normalize_site_data( $data ) {
	// Sanitize domain if passed.
	if ( array_key_exists( 'domain', $data ) ) {
		$data['domain'] = preg_replace( '/[^a-z0-9\-.:]+/i', '', $data['domain'] );
	}

	// Sanitize path if passed.
	if ( array_key_exists( 'path', $data ) ) {
		$data['path'] = trailingslashit( '/' . trim( $data['path'], '/' ) );
	}

	// Sanitize network ID if passed.
	if ( array_key_exists( 'network_id', $data ) ) {
		$data['network_id'] = (int) $data['network_id'];
	}

	// Sanitize status fields if passed.
	$status_fields = array( 'public', 'archived', 'mature', 'spam', 'deleted' );
	foreach ( $status_fields as $status_field ) {
		if ( array_key_exists( $status_field, $data ) ) {
			$data[ $status_field ] = (int) $data[ $status_field ];
		}
	}

	// Strip date fields if empty.
	$date_fields = array( 'registered', 'last_updated' );
	foreach ( $date_fields as $date_field ) {
		if ( ! array_key_exists( $date_field, $data ) ) {
			continue;
		}

		if ( empty( $data[ $date_field ] ) || '0000-00-00 00:00:00' === $data[ $date_field ] ) {
			unset( $data[ $date_field ] );
		}
	}

	return $data;
}

/**
 * Validates data for a site prior to inserting or updating in the database.
 *
 * @since 5.1.0
 *
 * @param WP_Error     $errors   Error object, passed by reference. Will contain validation errors if
 *                               any occurred.
 * @param array        $data     Associative array of complete site data. See {@see wp_insert_site()}
 *                               for the included data.
 * @param WP_Site|null $old_site The old site object if the data belongs to a site being updated,
 *                               or null if it is a new site being inserted.
 */
function wp_validate_site_data( $errors, $data, $old_site = null ) {
	// A domain must always be present.
	if ( empty( $data['domain'] ) ) {
		$errors->add( 'site_empty_domain', __( 'Site domain must not be empty.' ) );
	}

	// A path must always be present.
	if ( empty( $data['path'] ) ) {
		$errors->add( 'site_empty_path', __( 'Site path must not be empty.' ) );
	}

	// A network ID must always be present.
	if ( empty( $data['network_id'] ) ) {
		$errors->add( 'site_empty_network_id', __( 'Site network ID must be provided.' ) );
	}

	// Both registration and last updated dates must always be present and valid.
	$date_fields = array( 'registered', 'last_updated' );
	foreach ( $date_fields as $date_field ) {
		if ( empty( $data[ $date_field ] ) ) {
			$errors->add( 'site_empty_' . $date_field, __( 'Both registration and last updated dates must be provided.' ) );
			break;
		}

		// Allow '0000-00-00 00:00:00', although it be stripped out at this point.
		if ( '0000-00-00 00:00:00' !== $data[ $date_field ] ) {
			$month      = substr( $data[ $date_field ], 5, 2 );
			$day        = substr( $data[ $date_field ], 8, 2 );
			$year       = substr( $data[ $date_field ], 0, 4 );
			$valid_date = wp_checkdate( $month, $day, $year, $data[ $date_field ] );
			if ( ! $valid_date ) {
				$errors->add( 'site_invalid_' . $date_field, __( 'Both registration and last updated dates must be valid dates.' ) );
				break;
			}
		}
	}

	if ( ! empty( $errors->errors ) ) {
		return;
	}

	// If a new site, or domain/path/network ID have changed, ensure uniqueness.
	if ( ! $old_site
		|| $data['domain'] !== $old_site->domain
		|| $data['path'] !== $old_site->path
		|| $data['network_id'] !== $old_site->network_id
	) {
		if ( domain_exists( $data['domain'], $data['path'], $data['network_id'] ) ) {
			$errors->add( 'site_taken', __( 'Sorry, that site already exists!' ) );
		}
	}
}

/**
 * Runs the initialization routine for a given site.
 *
 * This process includes creating the site's database tables and
 *