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Arsse/vendor/JKingWeb/NewsSync/Db/Common.php
2016-10-17 16:49:39 -04:00

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1.7 KiB
PHP

<?php
declare(strict_types=1);
namespace JKingWeb\NewsSync\Db;
use JKingWeb\DrUUID\UUID as UUID;
Trait Common {
protected $transDepth = 0;
public function begin(): bool {
$this->exec("SAVEPOINT newssync_".($this->transDepth));
$this->transDepth += 1;
return true;
}
public function commit(bool $all = false): bool {
if($this->transDepth==0) return false;
if(!$all) {
$this->exec("RELEASE SAVEPOINT newssync_".($this->transDepth - 1));
$this->transDepth -= 1;
} else {
$this->exec("COMMIT TRANSACTION");
$this->transDepth = 0;
}
return true;
}
public function rollback(bool $all = false): bool {
if($this->transDepth==0) return false;
if(!$all) {
$this->exec("ROLLBACK TRANSACTION TO SAVEPOINT newssync_".($this->transDepth - 1));
// rollback to savepoint does not collpase the savepoint
$this->commit();
$this->transDepth -= 1;
if($this->transDepth==0) $this->exec("ROLLBACK TRANSACTION");
} else {
$this->exec("ROLLBACK TRANSACTION");
$this->transDepth = 0;
}
return true;
}
public function lock(): bool {
if($this->schemaVersion() < 1) return true;
if($this->isLocked()) return false;
$uuid = UUID::mintStr();
if(!$this->data->db->setSetting("lock", $uuid)) return false;
sleep(1);
if($this->data->db->getSetting("lock") != $uuid) return false;
return true;
}
public function unlock(): bool {
return $this->data->db->clearSetting("lock");
}
public function isLocked(): bool {
if($this->schemaVersion() < 1) return false;
return ($this->query("SELECT count(*) from newssync_settings where key = 'lock'")->getSingle() > 0);
}
public function prepare(string $query, string ...$paramType): Statement {
return $this->prepareArray($query, $paramType);
}
}