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<?php |
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namespace Wonderland\Container; |
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use Wonderland\Container\Service\ServiceDefinitionInterface; |
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use Wonderland\Container\Exception\DuplicatedServiceException; |
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use Psr\Container\ContainerInterface; |
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use Wonderland\Container\Service\ServiceInstanceInterface; |
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/** |
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* Class ServiceContainer |
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* @package Wonderland\Container\Container |
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* @author Alice Praud <[email protected]> |
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*/ |
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class ServiceContainer implements ContainerInterface |
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{ |
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/** @var ServiceDefinitionInterface[] */ |
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private $services; |
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/** @var array */ |
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private $serviceInstances; |
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/** |
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* ServiceContainer constructor. |
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*/ |
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public function __construct() |
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{ |
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$this->serviceInstances = []; |
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} |
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/** |
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* @param ServiceDefinitionInterface $serviceDefinition |
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*/ |
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public function addService(ServiceDefinitionInterface $serviceDefinition) |
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{ |
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$this->services[$serviceDefinition->getServiceName()] = $serviceDefinition; |
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} |
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/** |
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* @param ServiceInstanceInterface $definition |
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* @throws DuplicatedServiceException |
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*/ |
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public function addServiceInstance(ServiceInstanceInterface $definition) |
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{ |
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if (true === array_key_exists($definition->getServiceName(), $this->serviceInstances)) { |
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throw new DuplicatedServiceException( |
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'The service' . $definition->getServiceName() . ' is already registered in the container' |
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); |
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} |
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$this->serviceInstances[$definition->getServiceName()] = $definition->getInstance(); |
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} |
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/** |
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* @param string $index |
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* @param bool $new |
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* @return mixed|null |
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*/ |
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public function get($index, $new = false) |
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{ |
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// if service is shared true and already exists we return it |
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if (isset($this->serviceInstances[$index]) && false === $new) { |
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return $this->serviceInstances[$index]; |
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} |
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// is service not defined return null |
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if (!isset($this->services[$index])) { |
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return null; |
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} |
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// we create a new instance |
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$instance = $this->create($this->services[$index]); |
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// if shared true we set it in the current instances |
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if (false === $new) { |
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$this->serviceInstances[$index] = $instance; |
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} |
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return $instance; |
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} |
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/** |
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* Returns true if the container can return an entry for the given identifier. |
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* Returns false otherwise. |
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* |
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* `has($id)` returning true does not mean that `get($id)` will not throw an exception. |
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* It does however mean that `get($id)` will not throw a `NotFoundExceptionInterface`. |
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* |
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* @param string $index Identifier of the entry to look for. |
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* |
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* @return bool |
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*/ |
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public function has($index) |
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{ |
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// if service is shared true and already exists we return it |
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if (isset($this->serviceInstances[$index])) { |
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return true; |
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} |
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// is service not defined return null |
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if (isset($this->services[$index])) { |
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return true; |
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} |
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return false; |
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} |
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/** |
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* @param ServiceDefinitionInterface $serviceDefinition |
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* @return mixed |
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*/ |
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private function create(ServiceDefinitionInterface $serviceDefinition) |
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{ |
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// we get the class name in a var for the new later |
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$newClass = $serviceDefinition->getClass(); |
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// we get the construct args |
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$args = $this->checkArgsServices($serviceDefinition->getConstructArgs()); |
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$instance = new $newClass(...$args); |
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// we call the injection methods after we instance the object |
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$calls = $this->checkCallsServices($serviceDefinition->getCalls()); |
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foreach ($calls as $call => $params) { |
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call_user_func_array([$instance, $call], $params); |
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} |
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// we create the new instance |
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return $instance; |
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} |
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/** |
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* @param array $args |
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* @return array |
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*/ |
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private function checkArgsServices(array $args) |
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{ |
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// we check if any of the construct args are services themself and we create them |
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foreach ($args as $k => $arg) { |
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if (true === $this->has($arg)) { |
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$args[$k] = $this->get($arg); |
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} |
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} |
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return $args; |
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} |
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/** |
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* @param array $calls |
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* @return array |
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*/ |
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private function checkCallsServices(array $calls) |
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{ |
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// we check if any of the calls args are services themself and we create them |
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foreach ($calls as $callArgs) { |
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foreach ($callArgs as $k => $arg) { |
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if (true === $this->has($arg)) { |
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$args[$k] = $this->get($arg); |
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} |
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} |
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} |
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return $calls; |
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} |
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} |
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AliceMajere /
wonderland-container
