<?php
namespace nur\sery\db;

/**
 * Class Capacitor: un objet permettant d'attaquer un canal spécique d'une
 * instance de {@link CapacitorStorage}
 */
class Capacitor {
  function __construct(CapacitorStorage $storage, CapacitorChannel $channel, bool $ensureExists=true) {
    $this->storage = $storage;
    $this->channel = $channel;
    if ($ensureExists) $this->ensureExists();
  }

  /** @var CapacitorStorage */
  protected $storage;

  /** @var CapacitorChannel */
  protected $channel;

  function exists(): bool {
    return $this->storage->_exists($this->channel);
  }

  function ensureExists(): void {
    $this->storage->_ensureExists($this->channel);
  }

  function reset(): void {
    $this->storage->_reset($this->channel);
  }

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

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

  function count($filter=null): int {
    return $this->storage->_count($this->channel, $filter);
  }

  function one($filter): ?array {
    return $this->storage->_one($this->channel, $filter);
  }

  function all($filter): iterable {
    return $this->storage->_all($this->channel, $filter);
  }

  function each($filter, ?callable $func=null, ?array $args=null): int {
    return $this->storage->_each($this->channel, $filter, $func, $args);
  }

  function close(): void {
    $this->storage->close();
  }
}