trait LoggedStatementsTrait

trait LoggedStatementsTrait {
    
    /**
     * Logged statements.
     *
     * @var string[]
     */
    protected $loggedStatements;
    
    /**
     * {@inheritdoc}
     */
    public function query($query, array $args = [], $options = []) {
        // Log the query if it is a string, can receive statement objects e.g
        // in the pgsql driver. These are hard to log as the table name has already
        // been replaced.
        if (is_string($query)) {
            $stringified_args = array_map(function ($v) {
                return is_array($v) ? implode(',', $v) : $v;
            }, $args);
            $this->loggedStatements[] = str_replace(array_keys($stringified_args), array_values($stringified_args), $query);
        }
        return parent::query($query, $args, $options);
    }
    
    /**
     * Resets logged statements.
     *
     * @return $this
     */
    public function resetLoggedStatements() {
        $this->loggedStatements = [];
        return $this;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getDriverClass($class) {
        static $fixed_namespace;
        if (!$fixed_namespace) {
            // Override because we've altered the namespace in
            // \Drupal\KernelTests\Core\Cache\EndOfTransactionQueriesTest::getDatabaseConnectionInfo()
            // to use the logging Connection classes. Set to a proper database driver
            // namespace.
            $this->connectionOptions['namespace'] = (new \ReflectionClass(get_parent_class($this)))->getNamespaceName();
            $fixed_namespace = TRUE;
        }
        return parent::getDriverClass($class);
    }
    
    /**
     * Returns the executed queries.
     *
     * @return string[]
     */
    public function getLoggedStatements() {
        return $this->loggedStatements;
    }

}