pdo-document/src/Configuration.php

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<?php
/**
* @author Daniel J. Summers <daniel@bitbadger.solutions>
* @license MIT
*/
declare(strict_types=1);
namespace BitBadger\PDODocument;
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use BitBadger\InspiredByFSharp\Option;
use Exception;
use PDO;
/**
* Common configuration for the document library
*/
class Configuration
{
/** @var string The name of the ID field used in the database (will be treated as the primary key) */
public static string $idField = 'id';
/** @var AutoId The automatic ID generation process to use */
public static AutoId $autoId = AutoId::None;
/**
* @var int The number of characters a string generated by `AutoId::RandomString` will have (must be an even number)
*/
public static int $idStringLength = 16;
/** @var string|null The username to use to establish a data connection (use env PDO_DOC_USERNAME if possible) */
public static ?string $username = null;
/** @var string|null The password to use to establish a data connection (use env PDO_DOC_PASSWORD if possible) */
public static ?string $password = null;
/** @var array|null Options to use for connections (driver-specific) */
public static ?array $options = null;
/** @var Option<Mode> The mode in which the library is operating */
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public static Option $mode;
/** @var Option<string> The data source name (DSN) of the connection string */
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private static Option $pdoDSN;
/** @var PDO|null The PDO instance to use for database commands */
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private static ?PDO $pdo = null;
/**
* Use a Data Source Name (DSN)
*
* @param string $dsn The data source name to use (driver:[parameters])
* @throws DocumentException If a DSN does not start with `pgsql:` or `sqlite:`
*/
public static function useDSN(string $dsn): void
{
if (empty($dsn)) {
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self::$mode = self::$pdoDSN = Option::None();
} else {
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self::$mode = Option::Some(Mode::deriveFromDSN($dsn));
self::$pdoDSN = Option::Some($dsn);
}
}
/**
* Retrieve a new connection to the database
*
* @return PDO A new connection to the SQLite database with foreign key support enabled
* @throws Exception If this is called before a connection string is set
*/
public static function dbConn(): PDO
{
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if (is_null(self::$pdo)) {
$dsn = self::$pdoDSN->getOrThrow(fn()
=> new DocumentException('Please provide a data source name (DSN) before attempting data access'));
self::$pdo = new PDO($dsn, $_ENV['PDO_DOC_USERNAME'] ?? self::$username,
$_ENV['PDO_DOC_PASSWORD'] ?? self::$password, self::$options);
}
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return self::$pdo;
}
/**
* Retrieve the mode for the current database connection
*
* @return Mode The mode for the current database connection
* @throws Exception If the database mode has not been set
*/
public static function mode(?string $process = null): Mode
{
return self::$mode->getOrThrow(fn()
=> new DocumentException('Database mode not set' . (is_null($process) ? '' : "; cannot $process")));
}
/**
* You probably don't mean to be calling this; it is here for testing only
*
* @param Mode|null $mode The mode to set
*/
public static function overrideMode(?Mode $mode): void
{
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self::$mode = Option::of($mode);
}
/**
* Clear the current PDO instance
*/
public static function resetPDO(): void
{
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self::$pdo = null;
}
}