<?php
namespace Guzzle\Batch;
use Guzzle\Common\Exception\InvalidArgumentException;
/**
* Batch transfer strategy where transfer logic can be defined via a Closure.
* This class is to be used with {@see Guzzle\Batch\BatchInterface}
*/
class BatchClosureTransfer implements BatchTransferInterface
{
/** @var callable A closure that performs the transfer */
protected $callable;
/** @var mixed $context Context passed to the callable */
protected $context;
/**
* @param mixed $callable Callable that performs the transfer. This function should accept two arguments:
* (array $batch, mixed $context).
* @param mixed $context Optional context to pass to the batch divisor
*
* @throws InvalidArgumentException
*/
public function __construct($callable, $context = null)
{
if (!is_callable($callable)) {
throw new InvalidArgumentException('Argument must be callable');
}
$this->callable = $callable;
$this->context = $context;
}
public function transfer(array $batch)
{
return empty($batch) ? null : call_user_func($this->callable, $batch, $this->context);
}
}