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<?php |
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namespace alkemann\h2l; |
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use alkemann\h2l\exceptions\ConfigMissing; |
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use Closure; |
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use InvalidArgumentException; |
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use UnderflowException; |
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/** |
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* Class Connections |
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* |
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* @TODO tie close into a destruct to ensure connection closure? |
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* @package alkemann\h2l |
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*/ |
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class Connections |
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{ |
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/** |
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* @var array<string, mixed> |
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*/ |
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private static array $connections = []; |
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/** |
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* @var array<string, callable|Closure> |
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*/ |
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private static array $open = []; |
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/** |
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* @var array<string, callable|Closure> |
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*/ |
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private static array $close = []; |
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/** |
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* Add a new connection by giving a name and a closure that is callable to open and return it |
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* |
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* A close Closure may also be supplied for connection that requires/supports closing |
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* |
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* @param string $name name of of connection |
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* @param callable $open an anonymous function that takes no arguments and returns an open connection |
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* @param callable|null $close an optional anonymous function that takes the connection as arguments and closes it |
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* @throws InvalidArgumentException if connection $name already exists |
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*/ |
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public static function add(string $name, callable $open, ?callable $close = null): void |
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{ |
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if (isset(self::$open[$name])) { |
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throw new InvalidArgumentException("Connection $name already exists"); |
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} |
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self::$open[$name] = ($open instanceof Closure) ? $open : Closure::fromCallable($open); |
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if ($close) { |
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self::$close[$name] = ($close instanceof Closure) ? $close : Closure::fromCallable($close); |
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} |
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self::$connections[$name] = false; |
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} |
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/** |
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* Grab the opened connection, if it isnt open already, it will be opened. |
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* |
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* @param string $name name of of connection |
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* @return mixed an instanced and open connection |
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* @throws ConfigMissing |
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*/ |
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public static function get(string $name) |
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{ |
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if (!isset(self::$open[$name])) { |
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throw new ConfigMissing("Connection $name is not configured", ConfigMissing::MISSING_CONNECTION); |
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} |
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if (self::$connections[$name] === false) { |
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$open = self::$open[$name]; |
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self::$connections[$name] = $open(); |
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} |
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return self::$connections[$name]; |
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} |
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/** |
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* Close the named connection |
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* |
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* @param string $name name of of connection |
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* @throws UnderflowException when connection is already closed |
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* @throws InvalidArgumentException if connection does not exist |
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*/ |
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public static function close(string $name): void |
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{ |
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if (!isset(self::$open[$name])) { |
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throw new InvalidArgumentException("Connection $name does not exists"); |
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} |
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if (self::$connections[$name] === false) { |
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throw new UnderflowException("Already closed"); |
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} |
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if (!isset(self::$close[$name])) { |
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return; // Closing is optional, no error |
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} |
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$close = self::$close[$name]; |
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$close(self::$connections[$name]); |
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self::$connections[$name] = false; |
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} |
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} |
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alkemann /
h2l
