class ComposerMinimumStabilityValidator

final class ComposerMinimumStabilityValidator implements EventSubscriberInterface {
    use StringTranslationTrait;
    public function __construct(PathLocator $pathLocator, ComposerInspector $inspector) {
    }
    
    /**
     * Validates composer minimum stability.
     *
     * @param \Drupal\package_manager\Event\PreRequireEvent $event
     *   The stage event.
     */
    public function validate(PreRequireEvent $event) : void {
        $dir = $this->pathLocator
            ->getProjectRoot();
        $minimum_stability = $this->inspector
            ->getConfig('minimum-stability', $dir);
        $requested_packages = array_merge($event->getDevPackages(), $event->getRuntimePackages());
        foreach ($requested_packages as $package_name => $version) {
            // In the root composer.json, a stability flag can also be specified. They
            // take the form `constraint@stability`. A stability flag
            // allows the project owner to deviate from the minimum-stability setting.
            // @see https://getcomposer.org/doc/04-schema.md#package-links
            // @see \Composer\Package\Loader\RootPackageLoader::extractStabilityFlags()
            if (str_contains($version, '@')) {
                continue;
            }
            $stability = VersionParser::parseStability($version);
            // Because drupal/core prefers to not depend on composer/composer we need
            // to compare two versions that are identical except for stability to
            // determine if the package stability is less that the minimum stability.
            if (Semver::satisfies("1.0.0-{$stability}", "< 1.0.0-{$minimum_stability}")) {
                $event->addError([
                    $this->t("<code>@package_name</code>'s requested version @package_version is less stable (@package_stability) than the minimum stability (@minimum_stability) required in @file.", [
                        '@package_name' => $package_name,
                        '@package_version' => $version,
                        '@package_stability' => $stability,
                        '@minimum_stability' => $minimum_stability,
                        '@file' => $this->pathLocator
                            ->getProjectRoot() . '/composer.json',
                    ]),
                ]);
            }
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public static function getSubscribedEvents() : array {
        return [
            PreRequireEvent::class => 'validate',
        ];
    }

}