<?php

class TransactionManager {

	private $isTransactionStarted = false; //phpcs:ignore WordPress.NamingConventions.ValidVariableName.PropertyNotSnakeCase
	private static $instance;

	public function start() {
		global $wpdb;

		if ( ! $this->isTransactionStarted ) {
			$wpdb->query( 'BEGIN' );
			$this->isTransactionStarted = true;
		}
	}

	public function commit() {
		global $wpdb;
		global $blclog;
		$blclog->debug( 'Starting DB commit.' );

		$this->start();

		try {
			$wpdb->query( 'COMMIT' );
			$blclog->debug( 'Commit executed.' );
			$this->isTransactionStarted = false;
		} catch ( Exception $e ) {
			$wpdb->query( 'ROLLBACK' );
			$blclog->debug( 'Commit failed; rollback.' );
			$this->isTransactionStarted = false;
		}
	}

    //phpcs:ignore WordPress.NamingConventions.ValidFunctionName.MethodNameInvalid
	static public function getInstance() {
		if ( ! self::$instance ) {
			self::$instance = new TransactionManager();
		}

		return self::$instance;
	}
}