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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\Yii\Cycle\Schema; |
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use Generator; |
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use Psr\Container\ContainerInterface; |
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/** |
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* SchemaManager allows reading schema from providers available and clearing the schema in providers. |
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*/ |
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final class SchemaManager |
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{ |
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private ContainerInterface $container; |
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/** @var string[]|SchemaProviderInterface[] */ |
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private array $providers; |
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public function __construct(ContainerInterface $container, array $providers) |
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{ |
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$this->container = $container; |
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$this->providers = $providers; |
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} |
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public function read(): ?array |
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{ |
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$toWrite = new \SplStack(); |
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$schema = null; |
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foreach ($this->getProviders() as $provider) { |
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if ($provider->isReadable()) { |
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$schema = $provider->read(); |
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if ($schema !== null) { |
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break; |
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} |
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} |
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if ($provider->isWritable()) { |
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$toWrite->push($provider); |
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} |
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} |
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if ($schema === null) { |
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return null; |
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} |
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// Save schema |
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/** @var SchemaProviderInterface $provider */ |
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foreach ($toWrite as $provider) { |
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$provider->write($schema); |
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} |
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return $schema; |
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} |
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public function clear(): void |
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{ |
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$toClear = []; |
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$isWritableLast = false; |
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foreach ($this->getProviders() as $provider) { |
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$isWritableLast = $provider->isWritable(); |
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if ($isWritableLast) { |
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$toClear[] = $provider; |
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} |
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} |
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if ($isWritableLast) { |
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array_pop($toClear); |
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} |
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foreach ($toClear as $provider) { |
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$provider->clear(); |
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} |
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} |
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/** |
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* @return Generator|SchemaProviderInterface[] |
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*/ |
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private function getProviders(): Generator |
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{ |
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foreach ($this->providers as $key => &$provider) { |
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// Providers resolving |
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if (is_string($provider)) { |
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$provider = $this->container->get($provider); |
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} |
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// If Provider defined as ClassName => ConfigArray |
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if (is_array($provider) && is_string($key)) { |
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$provider = $this->container->get($key)->withConfig($provider); |
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} |
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if (!$provider instanceof SchemaProviderInterface) { |
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throw new \RuntimeException('Provider should be instance of SchemaProviderInterface.'); |
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} |
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yield $provider; |
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} |
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} |
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} |
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yiisoft /
yii-cycle
