<?php
namespace nur\sery\db;

/**
 * Class AbstractCapacitor: implémentation de base d'un {@link ICapacitor}
 */
abstract class CapacitorStorage implements ICapacitor {
  abstract protected function getChannel(?string $name): CapacitorChannel;

  abstract function _exists(CapacitorChannel $channel): bool;

  /** tester si le canal spécifié existe */
  function exists(?string $channel): bool {
    return $this->_exists($this->getChannel($channel));
  }

  abstract function _reset(CapacitorChannel $channel): void;

  /** supprimer le canal spécifié */
  function reset(?string $channel): void {
    $this->_reset($this->getChannel($channel));
  }

  abstract function _charge(CapacitorChannel $channel, $item, ?callable $func, ?array $args): bool;

  function charge(?string $channel, $item, ?callable $func=null, ?array $args=null): bool {
    return $this->_charge($this->getChannel($channel), $item, $func, $args);
  }

  abstract function _discharge(CapacitorChannel $channel, $filter, ?bool $reset): iterable;

  function discharge(?string $channel, $filter=null, ?bool $reset=null): iterable {
    return $this->_discharge($this->getChannel($channel), $filter, $reset);
  }

  abstract function _get(CapacitorChannel $channel, $filter);

  function get(?string $channel, $filter) {
    return $this->_get($this->getChannel($channel), $filter);
  }

  abstract function _each(CapacitorChannel $channel, $filter, callable $func, ?array $args): void;

  function each(?string $channel, $filter, callable $func, ?array $args=null): void {
    $this->_each($this->getChannel($channel), $filter, $func, $args);
  }

  abstract function close(): void;
}