<?php
declare(strict_types=1);
namespace DI\Definition\Resolver;
use DI\Definition\DecoratorDefinition;
use DI\Definition\Definition;
use DI\Definition\Exception\InvalidDefinition;
use Psr\Container\ContainerInterface;
/**
* Resolves a decorator definition to a value.
*
* @template-implements DefinitionResolver<DecoratorDefinition>
*
* @since 5.0
* @author Matthieu Napoli <matthieu@mnapoli.fr>
*/
class DecoratorResolver implements DefinitionResolver
{
/**
* The resolver needs a container. This container will be passed to the factory as a parameter
* so that the factory can access other entries of the container.
*
* @param DefinitionResolver $definitionResolver Used to resolve nested definitions.
*/
public function __construct(
private ContainerInterface $container,
private DefinitionResolver $definitionResolver,
) {
}
/**
* Resolve a decorator definition to a value.
*
* This will call the callable of the definition and pass it the decorated entry.
*
* @param DecoratorDefinition $definition
*/
public function resolve(Definition $definition, array $parameters = []) : mixed
{
$callable = $definition->getCallable();
if (! is_callable($callable)) {
throw new InvalidDefinition(sprintf(
'The decorator "%s" is not callable',
$definition->getName()
));
}
$decoratedDefinition = $definition->getDecoratedDefinition();
if (! $decoratedDefinition instanceof Definition) {
if (! $definition->getName()) {
throw new InvalidDefinition('Decorators cannot be nested in another definition');
}
throw new InvalidDefinition(sprintf(
'Entry "%s" decorates nothing: no previous definition with the same name was found',
$definition->getName()
));
}
$decorated = $this->definitionResolver->resolve($decoratedDefinition, $parameters);
return $callable($decorated, $this->container);
}
public function isResolvable(Definition $definition, array $parameters = []) : bool
{
return true;
}
}
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