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384 lines (307 loc) · 9.3 KB
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<?php
namespace A1phanumeric;
use Closure;
use PDO;
use PDOException;
use PDOStatement;
use RuntimeException;
class DBPDO
{
private static array $instances = [];
public ?PDO $pdo = null;
private ?string $error = null;
private string $dbname;
private string $dbhost;
private string $dbuser;
private string $dbpass;
private bool $sqlserver;
private array $options;
/** @var callable|null */
private $queryLogger = null;
public static function getInstance(
string $dbhost,
string $dbname,
string $dbuser,
string $dbpass,
bool $sqlserver = false,
array $options = []
): self {
$instanceKey = self::buildInstanceKey($dbhost, $dbname, $dbuser, $sqlserver, $options);
if (!isset(self::$instances[$instanceKey])) {
self::$instances[$instanceKey] = new self($dbhost, $dbname, $dbuser, $dbpass, $sqlserver, $options);
}
return self::$instances[$instanceKey];
}
public function __construct(
string $dbhost = '',
string $dbname = '',
string $dbuser = '',
string $dbpass = '',
bool $sqlserver = false,
array $options = []
) {
$this->dbhost = $dbhost;
$this->dbname = $dbname;
$this->dbuser = $dbuser;
$this->dbpass = $dbpass;
$this->sqlserver = $sqlserver;
$this->options = $options;
$this->connect();
}
private static function buildInstanceKey(
string $dbhost,
string $dbname,
string $dbuser,
bool $sqlserver,
array $options
): string {
$stableOptions = $options;
ksort($stableOptions);
return hash('sha256', implode('|', [
$dbhost,
$dbname,
$dbuser,
$sqlserver ? 'sqlsrv' : 'mysql',
json_encode($stableOptions),
]));
}
// Disallow cloning and unserializing
private function __clone()
{
}
public function __wakeup(): void
{
throw new RuntimeException('Unserializing DBPDO is not allowed.');
}
public function prep_query(string $query): PDOStatement
{
if ($this->pdo === null && !$this->connect()) {
throw new RuntimeException('Database connection is not available.');
}
return $this->pdo->prepare($query);
}
public function connect(): bool
{
if ($this->pdo instanceof PDO) {
return true;
}
$dsn = $this->buildDsn();
$user = $this->dbuser;
$password = $this->dbpass;
try {
$this->pdo = new PDO($dsn, $user, $password, $this->buildPdoAttributes());
$this->error = null;
return true;
} catch (PDOException $e) {
$this->error = $e->getMessage();
return false;
}
}
public function table_exists(string $table_name): bool
{
if ($this->sqlserver) {
$stmt = $this->execute(
'SELECT 1 FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = ? AND TABLE_CATALOG = ?',
[$table_name, $this->dbname]
);
if ($stmt === false) {
return false;
}
return (bool) $stmt->fetchColumn();
}
$stmt = $this->prep_query('SHOW TABLES LIKE ?');
$stmt->execute([$table_name]);
return $stmt->rowCount() > 0;
}
/**
* @param mixed $values
*/
public function execute(string $query, $values = null, bool $debug = false)
{
$params = $this->normalizeValues($values);
if ($debug) {
trigger_error('DBPDO::execute($debug=true) is deprecated. Use setQueryLogger() for diagnostics.', E_USER_DEPRECATED);
echo $query;
print_r($params);
return false;
}
$start = microtime(true);
try {
$stmt = $this->prep_query($query);
$stmt->execute($params);
$durationMs = (microtime(true) - $start) * 1000;
if (is_callable($this->queryLogger)) {
($this->queryLogger)($query, $params, $durationMs, null);
}
return $stmt;
} catch (PDOException $e) {
$this->error = $e->getMessage();
if (is_callable($this->queryLogger)) {
($this->queryLogger)($query, $params, null, $this->error);
}
return false;
}
}
/**
* @param mixed $values
*/
public function fetch(string $query, $values = null): ?array
{
$stmt = $this->execute($query, $values);
if ($stmt === false) {
return null;
}
$result = $stmt->fetch(PDO::FETCH_ASSOC);
return $result === false ? null : $result;
}
/**
* @param mixed $values
*/
public function fetchAll(string $query, $values = null, ?string $key = null): array
{
$stmt = $this->execute($query, $values);
if ($stmt === false) {
return [];
}
$results = $stmt->fetchAll(PDO::FETCH_ASSOC);
if ($key !== null && !empty($results)) {
$keyed_results = [];
foreach ($results as $result) {
if (array_key_exists($key, $result)) {
$keyed_results[$result[$key]] = $result;
}
}
return $keyed_results;
}
return $results;
}
public function beginTransaction(): bool
{
if ($this->pdo === null && !$this->connect()) {
return false;
}
return $this->pdo->beginTransaction();
}
public function commit(): bool
{
if ($this->pdo === null) {
return false;
}
return $this->pdo->commit();
}
public function rollBack(): bool
{
if ($this->pdo === null || !$this->pdo->inTransaction()) {
return false;
}
return $this->pdo->rollBack();
}
public function inTransaction(): bool
{
if ($this->pdo === null) {
return false;
}
return $this->pdo->inTransaction();
}
/**
* @param Closure $callback function(DBPDO $db): mixed
* @return mixed
*/
public function transaction(Closure $callback)
{
if (!$this->beginTransaction()) {
throw new RuntimeException('Unable to start database transaction.');
}
try {
$result = $callback($this);
$this->commit();
return $result;
} catch (\Throwable $e) {
if ($this->inTransaction()) {
$this->rollBack();
}
throw $e;
}
}
public function lastInsertId(): string
{
if ($this->pdo === null && !$this->connect()) {
return '0';
}
return $this->pdo->lastInsertId();
}
public function getPdo(): ?PDO
{
return $this->pdo;
}
public function getLastError(): ?string
{
return $this->error;
}
/**
* @param callable $logger function(string $query, array $params, ?float $durationMs, ?string $error): void
*/
public function setQueryLogger(callable $logger): self
{
$this->queryLogger = $logger;
return $this;
}
private function buildDsn(): string
{
if ($this->sqlserver) {
$encrypt = $this->options['encrypt'] ?? false;
$trustServerCertificate = $this->options['trust_server_certificate'] ?? false;
$port = $this->options['port'] ?? null;
$server = $this->dbhost;
if ($port !== null) {
$server .= ',' . $port;
}
return sprintf(
'sqlsrv:Server=%s;Database=%s;Encrypt=%s;TrustServerCertificate=%s',
$server,
$this->dbname,
$encrypt ? 'yes' : 'no',
$trustServerCertificate ? 'yes' : 'no'
);
}
$charset = $this->options['charset'] ?? 'utf8mb4';
$port = $this->options['port'] ?? null;
$dsn = sprintf('mysql:dbname=%s;host=%s;charset=%s', $this->dbname, $this->dbhost, $charset);
if ($port !== null) {
$dsn .= ';port=' . (int) $port;
}
return $dsn;
}
private function buildPdoAttributes(): array
{
$persistent = $this->options['persistent'] ?? false;
$attributes = [
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
PDO::ATTR_PERSISTENT => (bool) $persistent,
];
if (!$this->sqlserver) {
$attributes[PDO::ATTR_EMULATE_PREPARES] = false;
if (isset($this->options['timeout'])) {
$attributes[PDO::ATTR_TIMEOUT] = (int) $this->options['timeout'];
}
}
if (isset($this->options['attributes']) && is_array($this->options['attributes'])) {
$attributes = $this->options['attributes'] + $attributes;
}
return $attributes;
}
/**
* @param mixed $values
*/
private function normalizeValues($values): array
{
if ($values === null) {
return [];
}
if (is_array($values)) {
return $values;
}
return [$values];
}
}
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