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<?php

/**
 * Add Site Administration Screen
 *
 * @package WordPress
 * @subpackage Multisite
 * @since 3.1.0
 */


/** Load WordPress Administration Bootstrap */
require_once __DIR__ . '/admin.php';


/** WordPress Translation Installation API */
require_once ABSPATH . 'wp-admin/includes/translation-install.php';

if ( ! current_user_can( 'create_sites' ) ) {
  wp_die( __( 'Sorry, you are not allowed to add sites to this network.' ) );
}

get_current_screen()->add_help_tab(
  array(
    'id'      => 'overview',
    'title'   => __( 'Overview' ),
    'content' =>
      '<p>' . __( 'This screen is for Super Admins to add new sites to the network. This is not affected by the registration settings.' ) . '</p>' .
      '<p>' . __( 'If the admin email for the new site does not exist in the database, a new user will also be created.' ) . '</p>',
  )
);

get_current_screen()->set_help_sidebar(
  '<p><strong>' . __( 'For more information:' ) . '</strong></p>' .
  '<p>' . __( '<a href="https://wordpress.org/documentation/article/network-admin-sites-screen/">Documentation on Site Management</a>' ) . '</p>' .
  '<p>' . __( '<a href="https://wordpress.org/support/forum/multisite/">Support forums</a>' ) . '</p>'
);

if ( isset( $_REQUEST['action'] ) && 'add-site' === $_REQUEST['action'] ) {
  check_admin_referer( 'add-blog', '_wpnonce_add-blog' );

  if ( ! is_array( $_POST['blog'] ) ) {
    wp_die( __( 'Cannot create an empty site.' ) );
  }

  $blog   = $_POST['blog'];
  $domain = '';

  $blog['domain'] = trim( $blog['domain'] );
  if ( preg_match( '|^([a-zA-Z0-9-])+$|', $blog['domain'] ) ) {
    $domain = strtolower( $blog['domain'] );
  }

  // If not a subdomain installation, make sure the domain isn't a reserved word.
  if ( ! is_subdomain_install() ) {
    $subdirectory_reserved_names = get_subdirectory_reserved_names();

    if ( in_array( $domain, $subdirectory_reserved_names, true ) ) {
      wp_die(
        sprintf(
          /* translators: %s: Reserved names list. */
          __( 'The following words are reserved for use by WordPress functions and cannot be used as site names: %s' ),
          '<code>' . implode( '</code>, <code>', $subdirectory_reserved_names ) . '</code>'
        )
      );
    }
  }

  $title = $blog['title'];

  $meta = array(
    'public' => 1,
  );

  // Handle translation installation for the new site.
  if ( isset( $_POST['WPLANG'] ) ) {
    if ( '' === $_POST['WPLANG'] ) {
      $meta['WPLANG'] = ''; // en_US
    } elseif ( in_array( $_POST['WPLANG'], get_available_languages(), true ) ) {
      $meta['WPLANG'] = $_POST['WPLANG'];
    } elseif ( current_user_can( 'install_languages' ) && wp_can_install_language_pack() ) {
      $language = wp_download_language_pack( wp_unslash( $_POST['WPLANG'] ) );
      if ( $language ) {
        $meta['WPLANG'] = $language;
      }
    }
  }

  if ( empty( $title ) ) {
    wp_die( __( 'Missing site title.' ) );
  }

  if ( empty( $domain ) ) {
    wp_die( __( 'Missing or invalid site address.' ) );
  }

  if ( isset( $blog['email'] ) && '' === trim( $blog['email'] ) ) {
    wp_die( __( 'Missing email address.' ) );
  }

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