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<?php |
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namespace HotRodCli; |
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use HotRodCli\Checkers\BaseStatus; |
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use HotRodCli\Checkers\Container\HasArguments; |
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use HotRodCli\Checkers\Container\HasConstructor; |
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use HotRodCli\Checkers\Container\IsAlreadyExists; |
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use HotRodCli\Checkers\Container\IsInstantiable; |
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class AppContainer |
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{ |
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/** |
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* All registered. |
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* ---------------------------------------- |
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* @var array |
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*/ |
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protected $registry = []; |
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protected $checkers = [ |
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IsAlreadyExists::class => 'isAlreadyExists', |
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IsInstantiable::class => 'canNotInstantiate', |
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HasConstructor::class => 'hasConstructor', |
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HasArguments::class => 'hasArguments' |
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]; |
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public function resolve(string $class, $args = null) |
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{ |
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$status = $this->runCheckers($class, $args); |
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if (!$status->getStatus()) { |
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return $this->{$this->checkers[$status->getFailedWith()]}($class, $args); |
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} |
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$reflector = new \ReflectionClass($class); |
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$constructor = $reflector->getConstructor(); |
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$parameters = $constructor->getParameters(); |
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$dependencies = $this->getDependencies($parameters); |
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$result = $reflector->newInstanceArgs($dependencies); |
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$this->bind($class, $result); |
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return $result; |
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} |
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protected function runCheckers($class, $args) |
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{ |
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$exists = new IsAlreadyExists($this->registry, $class); |
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$isInstantiable = new IsInstantiable($class); |
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$hasConstructor = new HasConstructor($class); |
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$hasArguments = new HasArguments($args); |
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$exists->succeedWIth($isInstantiable); |
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$isInstantiable->succeedWIth($hasConstructor); |
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$hasConstructor->succeedWIth($hasArguments); |
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return $exists->check(new BaseStatus()); |
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} |
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protected function hasArguments($class, $args) |
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{ |
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return $this->resolveWithSetParams($class, $args); |
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} |
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protected function hasConstructor($class) |
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{ |
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return $this->resolveWithoutConstructor($class); |
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} |
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protected function isAlreadyExists($class) |
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{ |
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return $this->registry[$class]; |
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} |
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protected function canNotInstantiate($class) |
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{ |
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throw new \Exception("[$class] is not instantiable"); |
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} |
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protected function resolveWithoutConstructor(string $class) |
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{ |
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$result = new $class; |
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$this->bind($class, $result); |
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return $result; |
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} |
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protected function resolveWithSetParams(string $class, $args) |
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{ |
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$reflector = new \ReflectionClass($class); |
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$result = $reflector->newInstance($args); |
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$this->bind($class, $result); |
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return $result; |
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} |
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/** |
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* @param $parameters |
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* @return array |
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*/ |
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public function getDependencies($parameters) |
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{ |
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$dependencies = []; |
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/** @var \ReflectionParameter $parameter */ |
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foreach ($parameters as $parameter) { |
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$dependency = $parameter->getClass(); |
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if (is_null($dependency)) { |
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$dependencies[] = $this->resolveNonClass($parameter); |
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} else { |
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$dependencies[] = $this->resolve($dependency->name); |
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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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* @param $key |
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* @param $value |
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* @throws \Exception |
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*/ |
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public function bind($key, $value) |
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{ |
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if (! array_key_exists($key, $this->registry)) { |
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$this->registry[$key] = $value; |
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} else { |
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throw new \Exception("{$key} is already bound in the container."); |
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} |
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} |
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/** |
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* @param $key |
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* @return mixed |
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* @throws \Exception |
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*/ |
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public function get($key) |
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{ |
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if (! array_key_exists($key, $this->registry)) { |
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throw new \Exception("No {$key} is bound in the container."); |
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} |
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return $this->registry[$key]; |
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} |
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/** |
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* @param \ReflectionParameter $parameter |
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* @return mixed |
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* @throws \Exception |
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*/ |
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public function resolveNonClass(\ReflectionParameter $parameter) |
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{ |
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if ($parameter->isDefaultValueAvailable()) { |
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return $parameter->getDefaultValue(); |
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} |
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throw new \Exception("Cannot resolve the unknown"); |
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} |
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} |
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dmitrijivanenko /
hotrod-cli
