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<?php
namespace Guzzle\Service\Command\Factory;
use Guzzle\Service\Command\CommandInterface;
use Guzzle\Service\ClientInterface;
/**
* Composite factory used by a client object to create command objects utilizing multiple factories
*/
class CompositeFactory implements \IteratorAggregate, \Countable, FactoryInterface
{
/** @var array Array of command factories */
protected $factories;
/**
* Get the default chain to use with clients
*
* @param ClientInterface $client Client to base the chain on
*
* @return self
*/
public static function getDefaultChain(ClientInterface $client)
{
$factories = array();
if ($description = $client->getDescription()) {
$factories[] = new ServiceDescriptionFactory($description);
}
$factories[] = new ConcreteClassFactory($client);
return new self($factories);
}
/**
* @param array $factories Array of command factories
*/
public function __construct(array $factories = array())
{
$this->factories = $factories;
}
/**
* Add a command factory to the chain
*
* @param FactoryInterface $factory Factory to add
* @param string|FactoryInterface $before Insert the new command factory before a command factory class or object
* matching a class name.
* @return CompositeFactory
*/
public function add(FactoryInterface $factory, $before = null)
{
$pos = null;
if ($before) {
foreach ($this->factories as $i => $f) {
if ($before instanceof FactoryInterface) {
if ($f === $before) {
$pos = $i;
break;
}
} elseif (is_string($before)) {
if ($f instanceof $before) {
$pos = $i;
break;
}
}
}
}
if ($pos === null) {
$this->factories[] = $factory;
} else {
array_splice($this->factories, $i, 0, array($factory));
}
return $this;
}
/**
* Check if the chain contains a specific command factory
*
* @param FactoryInterface|string $factory Factory to check
*
* @return bool
*/
public function has($factory)
{
return (bool) $this->find($factory);
}
/**
* Remove a specific command factory from the chain
*
* @param string|FactoryInterface $factory Factory to remove by name or instance
*
* @return CompositeFactory
*/
public function remove($factory = null)
{
if (!($factory instanceof FactoryInterface)) {
$factory = $this->find($factory);
}
$this->factories = array_values(array_filter($this->factories, function($f) use ($factory) {
return $f !== $factory;
}));
return $this;
}
/**
* Get a command factory by class name
*
* @param string|FactoryInterface $factory Command factory class or instance
*
* @return null|FactoryInterface
*/
public function find($factory)
{
foreach ($this->factories as $f) {
if ($factory === $f || (is_string($factory) && $f instanceof $factory)) {
return $f;
}
}
}
/**
* Create a command using the associated command factories
*
* @param string $name Name of the command
* @param array $args Command arguments
*
* @return CommandInterface
*/
public function factory($name, array $args = array())
{
foreach ($this->factories as $factory) {
$command = $factory->factory($name, $args);
if ($command) {
return $command;
}
}
}
public function count()
{
return count($this->factories);
}
public function getIterator()
{
return new \ArrayIterator($this->factories);
}
}
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