public function create_item( $request ) {
    if ( ! empty( $request['id'] ) ) {
      return new WP_Error(
        'rest_comment_exists',
        __( 'Cannot create existing comment.' ),
        array( 'status' => 400 )
      );
    }

    // Do not allow comments to be created with a non-default type.
    if ( ! empty( $request['type'] ) && 'comment' !== $request['type'] ) {
      return new WP_Error(
        'rest_invalid_comment_type',
        __( 'Cannot create a comment with that type.' ),
        array( 'status' => 400 )
      );
    }

    $prepared_comment = $this->WP_REST_Comments_Controller::prepare_item_for_database( $request );
    if ( is_wp_error( $prepared_comment ) ) {
      return $prepared_comment;
    }

    $prepared_comment['comment_type'] = 'comment';

    if ( ! isset( $prepared_comment['comment_content'] ) ) {
      $prepared_comment['comment_content'] = '';
    }

    if ( ! $this->check_is_comment_content_allowed( $prepared_comment ) ) {
      return new WP_Error(
        'rest_comment_content_invalid',
        __( 'Invalid comment content.' ),
        array( 'status' => 400 )
      );
    }

    // Setting remaining values before wp_insert_comment so we can use wp_allow_comment().
    if ( ! isset( $prepared_comment['comment_date_gmt'] ) ) {
      $prepared_comment['comment_date_gmt'] = current_time( 'mysql', true );
    }

    // Set author data if the user's logged in.
    $missing_author = empty( $prepared_comment['user_id'] )
      && empty( $prepared_comment['comment_author'] )
      && empty( $prepared_comment['comment_author_email'] )
      && empty( $prepared_comment['comment_author_url'] );

    if ( is_user_logged_in() && $missing_author ) {
      $user = wp_get_current_user();

      $prepared_comment['user_id']              = $user->ID;
      $prepared_comment['comment_author']       = $user->display_name;
      $prepared_comment['comment_author_email'] = $user->user_email;
      $prepared_comment['comment_author_url']   = $user->user_url;
    }

    // Honor the discussion setting that requires a name and email address of the comment author.
    if ( get_option( 'require_name_email' ) ) {
      if ( empty( $prepared_comment['comment_author'] ) || empty( $prepared_comment['comment_author_email'] ) ) {
        return new WP_Error(
          'rest_comment_author_data_required',
          __( 'Creating a comment requires valid author name and email values.' ),
          array( 'status' => 400 )
        );
      }
    }

    if ( ! isset( $prepared_comment['comment_author_email'] ) ) {
      $prepared_comment['comment_author_email'] = '';
    }

    if ( ! isset( $prepared_comment['comment_author_url'] ) ) {
      $prepared_comment['comment_author_url'] = '';
    }

    if ( ! isset( $prepared_comment['comment_agent'] ) ) {
      $prepared_comment['comment_agent'] = '';
    }

    $check_comment_lengths = wp_check_comment_data_max_lengths( $prepared_comment );

    if ( is_wp_error( $check_comment_lengths ) ) {
      $error_code = $check_comment_lengths->get_error_code();
      return new WP_Error(
        $error_code,
        __( 'Comment field exceeds maximum length allowed.' ),
        array( 'status' => 400 )
      );
    }

    $prepared_comment['comment_approved'] = wp_allow_comment( $prepared_comment, true );

    if ( is_wp_error( $prepared_comment['comment_approved'] ) ) {
      $error_code    = $prepared_comment['comment_approved']->get_error_code();
      $error_message = $prepared_comment['comment_approved']->get_error_message();

      if ( 'comment_duplicate' === $error_code ) {
        return new WP_Error(
          $error_code,