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<?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\Storage;
use Exception;
use Piwik\Config;
use Piwik\Plugins\FeatureFlags\FeatureFlagInterface;
use Piwik\Plugins\FeatureFlags\FeatureFlagStorageInterface;
class ConfigFeatureFlagStorage implements FeatureFlagStorageInterface
{
private const CONFIG_FEATURE_NAME_SUFFIX = '_feature';
private const CONFIG_FEATURE_ENABLED_VALUE = 'enabled';
private const CONFIG_FEATURE_DISABLED_VALUE = 'disabled';
/**
* @var Config
*/
private $config;
/**
* @internal
* @param Config $config
*/
public function __construct(Config $config)
{
$this->config = $config;
}
/**
* @internal
* @param FeatureFlagInterface $feature
* @return bool|null
*/
public function isFeatureActive(FeatureFlagInterface $feature): ?bool
{
try {
$featureFlagsConfig = $this->config->FeatureFlags;
} catch (Exception $e) {
return false;
};
$configNameForFeature = $this->getConfigNameForFeature($feature->getName());
if (!isset($featureFlagsConfig[$configNameForFeature])) {
return null;
}
$flagValue = $featureFlagsConfig[$configNameForFeature];
return $flagValue === self::CONFIG_FEATURE_ENABLED_VALUE;
}
/**
* @internal
* @param FeatureFlagInterface $feature
* @return void
*/
public function disableFeatureFlag(FeatureFlagInterface $feature): void
{
if (!isset($this->config->FeatureFlags[$this->getConfigNameForFeature($feature->getName())])) {
return;
}
$this->config->FeatureFlags[$this->getConfigNameForFeature($feature->getName())] = self::CONFIG_FEATURE_DISABLED_VALUE;
$this->config->forceSave();
}
/**
* @internal
* @param FeatureFlagInterface $feature
* @return void
*/
public function enableFeatureFlag(FeatureFlagInterface $feature): void
{
if (!isset($this->config->FeatureFlags)) {
$this->config->FeatureFlags = [];
}
$this->config->FeatureFlags[$this->getConfigNameForFeature($feature->getName())] = self::CONFIG_FEATURE_ENABLED_VALUE;
$this->config->forceSave();
}
/**
* @internal
* @param string $feature
* @return void
*/
public function deleteFeatureFlag(string $featureName): void
{
if (!isset($this->config->FeatureFlags[$this->getConfigNameForFeature($featureName)])) {
return;
}
unset($this->config->FeatureFlags[$this->getConfigNameForFeature($featureName)]);
$this->config->forceSave();
}
private function getConfigNameForFeature(string $featureName): string
{
return $featureName . self::CONFIG_FEATURE_NAME_SUFFIX;
}
}
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