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<?php |
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declare(strict_types=1); |
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namespace Gacela\Framework\ClassResolver\DependencyResolver; |
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use Gacela\Framework\Config\GacelaFileConfig\GacelaConfigFileInterface; |
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use ReflectionClass; |
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use ReflectionNamedType; |
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use ReflectionParameter; |
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use RuntimeException; |
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use function is_callable; |
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final class DependencyResolver |
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{ |
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private GacelaConfigFileInterface $gacelaConfigFile; |
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public function __construct(GacelaConfigFileInterface $gacelaConfigFile) |
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{ |
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$this->gacelaConfigFile = $gacelaConfigFile; |
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} |
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/** |
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* @param class-string $resolvedClassName |
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* |
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* @return list<mixed> |
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*/ |
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public function resolveDependencies(string $resolvedClassName): array |
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{ |
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$reflection = new ReflectionClass($resolvedClassName); |
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$constructor = $reflection->getConstructor(); |
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if (!$constructor) { |
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return []; |
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} |
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/** @var list<mixed> $dependencies */ |
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$dependencies = []; |
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foreach ($constructor->getParameters() as $parameter) { |
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$paramType = $parameter->getType(); |
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if ($paramType) { |
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/** @psalm-suppress MixedAssignment */ |
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$dependencies[] = $this->resolveDependenciesRecursively($parameter); |
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} |
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} |
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return $dependencies; |
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} |
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/** |
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* @return mixed |
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*/ |
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private function resolveDependenciesRecursively(ReflectionParameter $parameter) |
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{ |
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/** @var ReflectionNamedType $paramType */ |
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$paramType = $parameter->getType(); |
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$type = $paramType->getName(); |
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if (!class_exists($type) && !interface_exists($type)) { |
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return $parameter->getDefaultValue(); |
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} |
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$reflection = new ReflectionClass($type); |
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// If it's an interface we need to figure out which concrete class do we want to use |
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if ($reflection->isInterface()) { |
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$gacelaFileDependencies = $this->gacelaConfigFile->dependencies(); |
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$concreteClass = $gacelaFileDependencies[$reflection->getName()] ?? ''; |
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// a callable will be a way to bypass the instantiation and instead |
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// use the result from the callable that was defined in the gacela config file. |
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if (is_callable($concreteClass)) { |
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return $concreteClass(); |
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} |
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// if at this point there is no concrete class found for the interface we can |
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// try one more thing looking for 1 concrete class that implements this interface |
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if (empty($concreteClass)) { |
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$concreteClass = $this->findConcreteClassThatImplements($reflection); |
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} |
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/** @var class-string $concreteClass */ |
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$reflection = new ReflectionClass($concreteClass); |
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} |
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$constructor = $reflection->getConstructor(); |
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if (!$constructor) { |
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return $reflection->newInstance(); |
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} |
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/** @var list<mixed> $innerDependencies */ |
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$innerDependencies = []; |
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foreach ($constructor->getParameters() as $constructorParameter) { |
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$paramType = $constructorParameter->getType(); |
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if ($paramType) { |
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/** @psalm-suppress MixedAssignment */ |
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$innerDependencies[] = $this->resolveDependenciesRecursively($constructorParameter); |
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} |
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} |
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return $reflection->newInstanceArgs($innerDependencies); |
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} |
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/** |
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* @return class-string|string |
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*/ |
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private function findConcreteClassThatImplements(ReflectionClass $interface): string |
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{ |
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// TODO: Not implemented yet |
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// Dummy solution: if the concrete class lives next to its interface, and with the same name. |
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$concreteClass = str_replace('Interface', '', $interface->getName()); |
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if (!class_exists($concreteClass)) { |
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$error = <<<TXT |
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No concrete class was found that implements: |
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{$interface->getName()} |
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Did you forget to map this interface to a concrete class in gacela.json using the 'dependencies' key? |
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TXT; |
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throw new RuntimeException($error); |
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} |
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return $concreteClass; |
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} |
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} |
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gacela-project /
gacela
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