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<?php declare(strict_types=1); |
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namespace Smr\Container; |
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use DI\Container; |
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use DI\ContainerBuilder; |
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use Dotenv\Dotenv; |
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use MySqlDatabase; |
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use mysqli; |
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use RuntimeException; |
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use Smr\MySqlProperties; |
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use function DI\autowire; |
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/** |
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* Class DiContainer |
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* A wrapper around the DI\Container functionality that will allow |
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* static usage of container methods. |
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* @package Smr\Container |
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*/ |
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class DiContainer { |
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private static DiContainer $instance; |
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private Container $container; |
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private function __construct() { |
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self::$instance = $this; |
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$this->container = $this->buildContainer(); |
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} |
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private function getDefinitions(): array { |
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return [ |
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/* |
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* mysqli is a 3rd party library, and we do not have control over its constructor. |
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* In order for PHP-DI to construct an instance of a class, each constructor argument must |
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* be able to be constructed. |
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* PHP-DI cannot construct mysqli by itself, because all of its arguments are primitive types. |
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* Therefore, we need to declare a provider factory for the container to use when constructing new instances. |
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* |
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* The factories themselves are able to use dependency injection as well, so we can provide the MysqlProperties |
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* typehint to make sure the container constructs and instance and provides it to the factory. |
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*/ |
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mysqli::class => function (MySqlProperties $mysqlProperties): mysqli { |
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// Set the mysqli driver to raise exceptions on errors |
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if (!mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT)) { |
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throw new RuntimeException('Failed to enable mysqli error reporting'); |
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} |
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return new mysqli( |
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$mysqlProperties->getHost(), |
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$mysqlProperties->getUser(), |
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$mysqlProperties->getPassword(), |
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$mysqlProperties->getDatabaseName()); |
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}, |
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Dotenv::class => function (): Dotenv { |
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return Dotenv::createArrayBacked(ROOT); |
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}, |
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// Explicitly name all classes that are autowired, so we can take advantage of |
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// the compiled container feature for a performance boost |
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MySqlProperties::class => autowire(), |
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MySqlDatabase::class => autowire() |
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]; |
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} |
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private function buildContainer(): Container { |
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$builder = new ContainerBuilder(); |
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return $builder |
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->addDefinitions($this->getDefinitions()) |
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->useAnnotations(false) |
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->useAutowiring(true) |
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// The CompiledContainer.php will be saved to the /tmp directory on the Docker container once |
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// during its lifecycle (first request) |
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->enableCompilation("/tmp") |
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->build(); |
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} |
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/** |
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* Create a new DI\Container instance. |
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* This needs to be done once during a bootstrapping script, like htdocs/config.inc |
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*/ |
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public static function initializeContainer(): void { |
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new DiContainer(); |
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} |
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/** |
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* Retrieve the managed instance of $className, or construct a new instance with all dependencies. |
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* @param string $className The name of the class to retrieve from the container. |
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* @return mixed |
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* @throws \DI\DependencyException |
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* @throws \DI\NotFoundException |
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*/ |
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public static function get(string $className) { |
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return self::getContainer()->get($className); |
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} |
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/** |
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* Construct a fresh instance of $className. Dependencies will be retrieved from the container if they |
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* are already managed, and created themselves if they are not. |
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* @param string $className The name of the class to construct. |
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* @return mixed |
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* @throws \DI\DependencyException |
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* @throws \DI\NotFoundException |
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*/ |
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public static function make(string $className) { |
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return self::getContainer()->make($className); |
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} |
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/** |
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* Return the raw dependency injection Container instance for more robust |
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* container management operations. |
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* @return Container |
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*/ |
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public static function getContainer(): Container { |
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return self::$instance->container; |
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} |
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} |
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smrealms /
smr
