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<?php
/**
* Container class file.
*/
namespace Automattic\Kkart;
use Automattic\Kkart\Internal\DependencyManagement\ServiceProviders\ProxiesServiceProvider;
use Automattic\Kkart\Internal\DependencyManagement\ExtendedContainer;
/**
* PSR11 compliant dependency injection container for Kkart.
*
* Classes in the `src` directory should specify dependencies from that directory via constructor arguments
* with type hints. If an instance of the container itself is needed, the type hint to use is \Psr\Container\ContainerInterface.
*
* Classes in the `src` directory should interact with anything outside (especially code in the `includes` directory
* and WordPress functions) by using the classes in the `Proxies` directory. The exception is idempotent
* functions (e.g. `wp_parse_url`), those can be used directly.
*
* Classes in the `includes` directory should use the `kkart_get_container` function to get the instance of the container when
* they need to get an instance of a class from the `src` directory.
*
* Class registration should be done via service providers that inherit from Automattic\Kkart\Internal\DependencyManagement
* and those should go in the `src\Internal\DependencyManagement\ServiceProviders` folder unless there's a good reason
* to put them elsewhere. All the service provider class names must be in the `SERVICE_PROVIDERS` constant.
*/
final class Container implements \Psr\Container\ContainerInterface {
/**
* The list of service provider classes to register.
*
* @var string[]
*/
private $service_providers = array(
ProxiesServiceProvider::class,
);
/**
* The underlying container.
*
* @var \League\Container\Container
*/
private $container;
/**
* Class constructor.
*/
public function __construct() {
$this->container = new ExtendedContainer();
// Add ourselves as the shared instance of ContainerInterface,
// register everything else using service providers.
$this->container->share( \Psr\Container\ContainerInterface::class, $this );
foreach ( $this->service_providers as $service_provider_class ) {
$this->container->addServiceProvider( $service_provider_class );
}
}
/**
* Finds an entry of the container by its identifier and returns it.
*
* @param string $id Identifier of the entry to look for.
*
* @throws NotFoundExceptionInterface No entry was found for **this** identifier.
* @throws Psr\Container\ContainerExceptionInterface Error while retrieving the entry.
*
* @return mixed Entry.
*/
public function get( $id ) {
return $this->container->get( $id );
}
/**
* Returns true if the container can return an entry for the given identifier.
* Returns false otherwise.
*
* `has($id)` returning true does not mean that `get($id)` will not throw an exception.
* It does however mean that `get($id)` will not throw a `NotFoundExceptionInterface`.
*
* @param string $id Identifier of the entry to look for.
*
* @return bool
*/
public function has( $id ) {
return $this->container->has( $id );
}
}
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