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<?php |
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namespace veejay\container; |
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use Psr\Container\ContainerInterface; |
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/** |
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* DI контейнер. |
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* |
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* 1. Вариант использования по названию класса. |
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* $c = new Container; |
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* $c->set(Component::class, fn() => new Component); |
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* $c->get(Component::class); |
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* |
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* 2. Вариант использования с произвольным названием компонента, если один класс используется в двух разных компонентах. |
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* $c = new Container; |
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* $c->set('one', fn() => new Component); |
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* $c->set('two', function(Container $di) { |
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* return new Component; |
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* }); |
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* $c->get('one'); // Идентично |
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* $c->one; // Идентично |
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* |
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* Class Container |
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*/ |
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class Container implements ContainerInterface |
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{ |
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/** |
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* Экземпляры компонентов. |
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* @var array |
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*/ |
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protected array $instances = []; |
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/** |
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* Конструкторы компонентов. |
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* @var array |
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*/ |
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protected array $definitions = []; |
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/** |
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* @param string $name |
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* @return object|null |
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*/ |
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public function __get(string $name) |
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{ |
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return $this->get($name); |
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} |
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/** |
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* @param string $name |
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* @param mixed $value |
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* @return void |
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*/ |
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public function __set(string $name, mixed $value): void |
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{ |
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$this->set($name, $value); |
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} |
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/** |
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* @param string $name |
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* @return bool |
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*/ |
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public function __isset(string $name): bool |
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{ |
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return $this->has($name); |
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} |
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/** |
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* @param string $name |
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* @return void |
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*/ |
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public function __unset(string $name): void |
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{ |
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$this->unset($name); |
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} |
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/** |
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* Получение компонента. |
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* @param string $id |
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* @return object|null |
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*/ |
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public function get(string $id): ?object |
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{ |
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if (isset($this->instances[$id])) { |
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return $this->instances[$id]; |
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} |
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if (!array_key_exists($id, $this->definitions)) { |
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return null; |
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} |
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$definition = $this->definitions[$id]; |
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$instance = $definition($this); |
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return $this->instances[$id] = $instance; |
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} |
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/** |
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* Регистрация компонента. |
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* @param string $id |
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* @param callable $definition |
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* @return void |
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*/ |
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public function set(string $id, callable $definition): void |
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{ |
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$this->unset($id); |
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$this->definitions[$id] = $definition; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function has(string $id): bool |
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{ |
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return array_key_exists($id, $this->definitions); |
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} |
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/** |
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* Удаление компонента. |
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* @param string $id |
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* @return void |
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*/ |
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public function unset(string $id): void |
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{ |
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if (array_key_exists($id, $this->instances)) { |
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unset($this->instances[$id]); |
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} |
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if (array_key_exists($id, $this->definitions)) { |
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unset($this->definitions[$id]); |
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} |
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} |
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} |
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Veejayspb /
container
