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<?php |
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/** |
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* Bright Nucleus Config Component. |
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* |
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* @package BrightNucleus\Config |
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* @author Alain Schlesser <[email protected]> |
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* @license MIT |
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* @link http://www.brightnucleus.com/ |
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* @copyright 2016-2017 Alain Schlesser, Bright Nucleus |
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*/ |
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namespace BrightNucleus\Config; |
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use BrightNucleus\Config\ConfigSchemaInterface as Schema; |
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use BrightNucleus\Config\ConfigValidatorInterface as Validator; |
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use BrightNucleus\Config\Exception\FailedToInstantiateParentException; |
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use BrightNucleus\Config\Exception\FailedToLoadConfigException; |
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use BrightNucleus\Config\Exception\FailedToResolveConfigException; |
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use BrightNucleus\Config\Exception\InvalidConfigException; |
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use BrightNucleus\Config\Exception\InvalidConfigurationSourceException; |
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use Exception; |
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use Symfony\Component\OptionsResolver\OptionsResolver; |
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/** |
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* Generic implementation of a Config object. |
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* |
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* @since 0.1.0 |
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* |
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* @package BrightNucleus\Config |
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* @author Alain Schlesser <[email protected]> |
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*/ |
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class Config extends AbstractConfig |
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{ |
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/** |
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* The schema of the Config file. |
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* |
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* @var Schema |
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*/ |
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protected $schema; |
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/** |
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* The Validator class that gets asked to do the validation of the config. |
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* |
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* @since 0.1.0 |
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* |
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* @var Validator |
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*/ |
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protected $validator; |
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/** |
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* Instantiate the Config object. |
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* |
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* It accepts either an array with the configuration settings, or a |
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* filename pointing to a PHP file it can include. |
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* |
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* @since 0.1.0 |
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* @since 0.1.6 Accepts a delimiter to parse configuration keys. |
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* |
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* @param array|string $config Array with settings or filename for the |
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* settings file. |
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* @param Schema|null $schema Optional. Config that contains default |
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* values that can get overwritten. |
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* @param Validator|null $validator Optional. Validator class that does the |
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* actual validation. |
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* @param string[]|string|null $delimiter A string or array of strings that are used as delimiters to parse |
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* configuration keys. Defaults to "\", "/" & ".". |
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* |
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* @throws InvalidConfigurationSourceException If the config source is not a string or array. |
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* @throws FailedToInstantiateParentException If the parent class could not be instantiated. |
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* @throws FailedToLoadConfigException If loading of the config source failed. |
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* @throws FailedToResolveConfigException If the config file could not be resolved. |
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* @throws InvalidConfigException If the config file is not valid. |
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*/ |
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public function __construct( |
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$config, |
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Schema $schema = null, |
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Validator $validator = null, |
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$delimiter = null |
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) { |
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$this->schema = $schema; |
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$this->validator = $validator; |
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// Make sure $config is either a string or array. |
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if (! (is_string($config) || is_array($config))) { |
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throw new InvalidConfigurationSourceException( |
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sprintf( |
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_('Invalid configuration source: %1$s'), |
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print_r($config, true) |
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) |
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); |
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} |
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if (is_string($config)) { |
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$config = Loader::load($config); |
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} |
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// Run the $config through the OptionsResolver. |
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$config = $this->resolveOptions($config); |
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// Instantiate the parent class. |
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try { |
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parent::__construct($config, $delimiter); |
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} catch (Exception $exception) { |
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throw new FailedToInstantiateParentException( |
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sprintf( |
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_('Could not instantiate the configuration through its parent. Reason: %1$s'), |
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$exception->getMessage() |
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) |
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); |
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} |
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// Finally, validate the resulting config. |
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if (! $this->isValid()) { |
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throw new InvalidConfigException( |
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sprintf( |
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_('ConfigInterface file is not valid: %1$s'), |
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print_r($config, true) |
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) |
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); |
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} |
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} |
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/** |
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* Validate the Config file. |
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* |
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* @since 0.1.0 |
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* |
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* @return boolean |
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*/ |
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public function isValid() |
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{ |
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if ($this->validator) { |
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return $this->validator->isValid($this); |
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} |
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return true; |
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} |
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/** |
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* Process the passed-in defaults and merge them with the new values, while |
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* checking that all required options are set. |
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* |
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* @since 0.1.0 |
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* |
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* @param array $config Configuration settings to resolve. |
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* |
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* @return array Resolved configuration settings. |
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* @throws FailedToResolveConfigException If there are errors while resolving the options. |
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*/ |
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protected function resolveOptions($config) |
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{ |
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if (! $this->schema) { |
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return $config; |
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} |
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try { |
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$resolver = new OptionsResolver(); |
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if ($this->configureOptions($resolver)) { |
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$config = $resolver->resolve($config); |
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} |
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} catch (Exception $exception) { |
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throw new FailedToResolveConfigException( |
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sprintf( |
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_('Error while resolving config options: %1$s'), |
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$exception->getMessage() |
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) |
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); |
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} |
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return $config; |
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} |
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/** |
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* Configure the possible and required options for the Config. |
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* |
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* This should return a bool to let the resolve_options() know whether the |
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* actual resolving needs to be done or not. |
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* |
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* @since 0.1.0 |
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* |
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* @param OptionsResolver $resolver Reference to the OptionsResolver |
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* instance. |
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* |
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* @return bool Whether to do the resolving. |
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* @throws FailedToResolveConfigException If there are errors while processing. |
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*/ |
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protected function configureOptions(OptionsResolver $resolver) |
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{ |
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$defined = $this->schema->getDefinedOptions(); |
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$defaults = $this->schema->getDefaultOptions(); |
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$required = $this->schema->getRequiredOptions(); |
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if (! $defined && ! $defaults && ! $required) { |
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return false; |
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} |
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try { |
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if ($defined) { |
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$resolver->setDefined($defined); |
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} |
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if ($defaults) { |
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$resolver->setDefaults($defaults); |
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} |
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if ($required) { |
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$resolver->setRequired($required); |
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} |
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} catch (Exception $exception) { |
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throw new FailedToResolveConfigException( |
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sprintf( |
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_('Error while processing config options: %1$s'), |
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$exception->getMessage() |
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) |
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); |
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} |
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return true; |
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} |
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} |
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