public function add_order_note( $note, $is_customer_note = 0, $added_by_user = false ) {
		if ( ! $this->get_id() ) {
			return 0;
		}

		if ( is_user_logged_in() && current_user_can( 'edit_shop_order', $this->get_id() ) && $added_by_user ) {
			$user                 = get_user_by( 'id', get_current_user_id() );
			$comment_author       = $user->display_name;
			$comment_author_email = $user->user_email;
		} else {
			$comment_author        = __( 'WooCommerce', 'woocommerce' );
			$comment_author_email  = strtolower( __( 'WooCommerce', 'woocommerce' ) ) . '@';
			$comment_author_email .= isset( $_SERVER['HTTP_HOST'] ) ? str_replace( 'www.', '', sanitize_text_field( wp_unslash( $_SERVER['HTTP_HOST'] ) ) ) : 'noreply.com'; // WPCS: input var ok.
			$comment_author_email  = sanitize_email( $comment_author_email );
		}
		$commentdata = apply_filters(
			'woocommerce_new_order_note_data',
			array(
				'comment_post_ID'      => $this->get_id(),
				'comment_author'       => $comment_author,
				'comment_author_email' => $comment_author_email,
				'comment_author_url'   => '',
				'comment_content'      => $note,
				'comment_agent'        => 'WooCommerce',
				'comment_type'         => 'order_note',
				'comment_parent'       => 0,
				'comment_approved'     => 1,
			),
			array(
				'order_id'         => $this->get_id(),
				'is_customer_note' => $is_customer_note,
			)
		);

		$comment_id = wp_insert_comment( $commentdata );

		if ( $is_customer_note ) {
			add_comment_meta( $comment_id, 'is_customer_note', 1 );

			do_action(
				'woocommerce_new_customer_note',
				array(
					'order_id'      => $this->get_id(),
					'customer_note' => $commentdata['comment_content'],
				)
			);
		}

		return $comment_id;
	}