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<?php |
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namespace ntentan\panie; |
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/** |
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* Description of Container |
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* |
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* @author ekow |
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*/ |
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class Container |
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{ |
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private $bindings; |
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private $singletons = []; |
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public function __construct() |
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{ |
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$this->bindings = new Bindings(); |
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} |
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/** |
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* |
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* @param string|\ReflectionClass $class |
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* @return \ReflectionClass |
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*/ |
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private function getResolvedClassName($class) |
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{ |
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$bound = null; |
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if ($this->bindings->has($class)) { |
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$bound = $this->bindings->get($class); |
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} else if (is_string($class) && class_exists($class)) { |
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$bound = ['binding' => $class]; |
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} |
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return $bound; |
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} |
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public function bind($type) |
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{ |
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return $this->bindings->setActiveKey($type); |
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} |
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public function has($type) |
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{ |
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return $this->bindings->has($type); |
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} |
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public function setup($bindings) |
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{ |
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$this->bindings->merge($bindings); |
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} |
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public function resolve($type, $constructorArguments = []) |
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{ |
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if ($type === null) { |
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throw new exceptions\ResolutionException("Cannot resolve an empty type"); |
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} |
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$resolvedClass = $this->getResolvedClassName($type); |
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if ($resolvedClass['binding'] === null) { |
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throw new exceptions\ResolutionException("Could not resolve dependency $type"); |
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} |
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if ($resolvedClass['singleton'] ?? false) { |
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$instance = $this->getSingletonInstance($type, $resolvedClass['binding'], $constructorArguments); |
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} else { |
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$instance = $this->getInstance($resolvedClass['binding'], $constructorArguments); |
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} |
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foreach($resolvedClass['calls'] ?? [] as $method => $parameters) { |
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$method = new \ReflectionMethod($instance, $method); |
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$method->invokeArgs($instance, $this->getConstructorArguments($method, $parameters)); |
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} |
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return $instance; |
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} |
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private function getConstructorArguments($constructor, $constructorArguments) |
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{ |
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$argumentValues = []; |
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$parameters = $constructor->getParameters(); |
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foreach ($parameters as $parameter) { |
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$class = $parameter->getClass(); |
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$className = $class ? $class->getName() : null; |
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if (isset($constructorArguments[$parameter->getName()])) { |
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$argumentValues[] = $constructorArguments[$parameter->getName()]; |
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} else { |
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$argumentValues[] = $className ? $this->resolve($className) : null; |
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} |
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} |
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return $argumentValues; |
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} |
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private function getSingletonInstance($type, $class, $constructorArguments) |
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{ |
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if (!isset($this->singletons[$type])) { |
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$this->singletons[$type] = $this->getInstance($class, $constructorArguments); |
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} |
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return $this->singletons[$type]; |
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} |
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private function getInstance($className, $constructorArguments = []) |
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{ |
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if (is_callable($className)) { |
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return $className($this); |
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} |
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$reflection = new \ReflectionClass($className); |
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if ($reflection->isAbstract()) { |
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throw new exceptions\ResolutionException( |
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"Abstract class {$reflection->getName()} cannot be instantiated. " |
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. "Please provide a binding to an implementation." |
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); |
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} |
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$constructor = $reflection->getConstructor(); |
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return $reflection->newInstanceArgs($constructor ? $this->getConstructorArguments($constructor, $constructorArguments) : []); |
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} |
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} |
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ntentan /
panie
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