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✏️ Editing: FeatureFlagManager.php

<?php

/**
 * Matomo - free/libre analytics platform
 *
 * @link    https://matomo.org
 * @license https://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
 */
namespace Piwik\Plugins\FeatureFlags;

use Piwik\Container\StaticContainer;
use Piwik\Log\Logger;
use Piwik\Log\LoggerInterface;
class FeatureFlagManager
{
    /**
     * @var FeatureFlagStorageInterface[]
     */
    private $storages;
    /**
     * @var Logger
     */
    private $logger;
    public function __construct(array $storages, LoggerInterface $logger)
    {
        $this->storages = $storages;
        $this->logger = $logger;
    }
    /**
     * @param string $featureFlag The ::class name of a class that implements FeatureFlagInterface
     */
    public function isFeatureActive(string $featureFlag) : bool
    {
        $featureFlagObj = $this->createFeatureFlagObjFromString($featureFlag);
        if ($featureFlagObj === null) {
            return \false;
        }
        $featureActive = \false;
        foreach ($this->storages as $storage) {
            $isActive = $storage->isFeatureActive($featureFlagObj);
            if ($isActive !== null) {
                $featureActive = $isActive;
            }
        }
        return $featureActive;
    }
    /**
     * @internal
     */
    public static function deleteFeatureFlag(string $featureFlagName) : void
    {
        /** @var FeatureFlagStorageInterface $storage */
        foreach (StaticContainer::get('featureflag.storages') as $storage) {
            $storage->deleteFeatureFlag($featureFlagName);
        }
    }
    private function createFeatureFlagObjFromString(string $featureFlag) : ?\Piwik\Plugins\FeatureFlags\FeatureFlagInterface
    {
        if (!is_subclass_of($featureFlag, \Piwik\Plugins\FeatureFlags\FeatureFlagInterface::class)) {
            $this->logger->debug('isFeatureActive failed due to class not implementing FeatureFlagInterface', ['featureFlag' => $featureFlag]);
            return null;
        }
        return new $featureFlag();
    }
}

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