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<?php |
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declare(strict_types = 1); |
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namespace Innmind\Compose\Definition; |
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use Innmind\Compose\{ |
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Definition\Dependency\Parameter, |
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Definition\Service\Argument, |
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Services, |
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Lazy, |
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Exception\ReferenceNotFound, |
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Exception\ArgumentNotExtractable |
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}; |
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use Innmind\Immutable\{ |
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Set, |
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Map, |
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StreamInterface |
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}; |
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final class Dependency |
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{ |
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private $name; |
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private $services; |
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private $parameters; |
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public function __construct( |
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Name $name, |
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Services $services, |
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Parameter ...$parameters |
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) { |
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$this->name = $name; |
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$this->services = $services; |
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$this->parameters = Set::of(Parameter::class, ...$parameters); |
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} |
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public function name(): Name |
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{ |
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return $this->name; |
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} |
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public function bind(Services $services): self |
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{ |
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$parameters = $this |
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->parameters |
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->reduce( |
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new Map('string', 'mixed'), |
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static function(Map $parameters, Parameter $parameter) use ($services): Map { |
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return $parameters->put( |
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(string) $parameter->name(), |
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$parameter->resolve($services) |
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); |
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} |
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); |
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$self = clone $this; |
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$self->services = $self->services->inject($parameters); |
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return $self; |
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} |
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public function lazy(Name $name): Lazy |
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{ |
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if (!$this->has($name)) { |
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throw new ReferenceNotFound((string) $name); |
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} |
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return new Lazy( |
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$name, |
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$this->services |
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); |
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} |
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public function build(Name $name): object |
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{ |
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return $this->lazy($name)->load(); |
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} |
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public function has(Name $name): bool |
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{ |
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if (!$this->services->has($name)) { |
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return false; |
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} |
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$service = $this->services->get($name); |
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if (!$service->exposed() || !$service->isExposedAs($name)) { |
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return false; |
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} |
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return true; |
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} |
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public function dependsOn(self $other): bool |
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{ |
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return $this->parameters->reduce( |
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false, |
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function(bool $dependsOn, Parameter $parameter) use ($other): bool { |
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return $dependsOn || $parameter->refersTo($other); |
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} |
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); |
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} |
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public function decorate( |
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Name $decorator, |
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Name $decorated, |
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Name $newName = null |
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): Service { |
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if (!$this->has($decorator)) { |
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throw new ReferenceNotFound((string) $decorator); |
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} |
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$service = $this->services->get($decorator); |
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return $service->tunnel($this->name, $decorated, $newName); |
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} |
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/** |
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* @param StreamInterface<mixed> $arguments |
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* |
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* @return StreamInterface<mixed> |
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*/ |
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public function extract( |
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Name $name, |
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StreamInterface $arguments, |
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Argument $argument |
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): StreamInterface { |
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if (!$this->has($name)) { |
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throw new ReferenceNotFound((string) $name); |
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} |
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$service = $this->services->get($name); |
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if ( |
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!$service->decorates() || |
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!$service->arguments()->contains($argument) |
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) { |
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throw new ArgumentNotExtractable; |
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} |
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return $argument->resolve( |
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$arguments, |
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$this->services |
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); |
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} |
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} |
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Innmind /
Compose
Let?s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let?s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: