<?php

namespace Ulmus\Pdo;

trait SqlitePdoTrait
{
    use SqlPdoTrait;

    public bool $inTransaction = false;

    public function inTransaction(): bool
    {
        return $this->openedTransaction > 0;
    }

    public function commit(): bool
    {
        if ( 0 === --$this->openedTransaction) {
            return $this->exec("COMMIT") !== false;
        }

        return $this->exec("RELEASE SAVEPOINT transaction_{$this->openedTransaction}") !== false;
    }

    public function rollback() : bool
    {
        if ($this->openedTransaction > 1) {
            return $this->exec('ROLLBACK TO transaction_' . $this->openedTransaction--) !== false;
        }
        elseif ($this->openedTransaction-- === 1) {
            # We must do it manually since opening a transaction manually stucks PDO into thinking we've got no transaction opened
            return $this->exec('ROLLBACK') !== false;
        }

        return false;
    }

    protected function openTransaction(): bool
    {
        return $this->exec("BEGIN IMMEDIATE TRANSACTION") !== false;
    }
}