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<?php |
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/** |
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* This file is part of the daikon-cqrs/config project. |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace Daikon\Config; |
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final class ConfigProvider implements ConfigProviderInterface |
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{ |
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private const INTERPOLATION_PATTERN = '/(\$\{(.*?)\})/'; |
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private $config; |
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private $params; |
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private $preLoadInterpolations; |
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public function __construct(ConfigProviderParamsInterface $params) |
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{ |
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$this->params = $params; |
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$this->config = []; |
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$this->preLoadInterpolations = []; |
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} |
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public function get(string $path, $default = null) |
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{ |
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$configPath = ConfigPath::fromString($path); |
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$scope = $configPath->getScope(); |
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if (isset($this->preLoadInterpolations[$scope])) { |
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throw new \Exception( |
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'Recursive interpolations are not allowed when interpolating "locations" or "sources". '. |
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sprintf('Trying to recurse into scope: "%s"', $scope) |
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); |
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} |
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if (!isset($this->config[$scope]) && $this->params->hasScope($scope)) { |
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$this->config[$scope] = $this->loadScope($scope); |
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} |
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return $this->resolvePath($configPath) ?? $default; |
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} |
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public function has(string $path): bool |
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{ |
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return $this->get($path) !== null; |
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} |
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private function loadScope(string $scope) |
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{ |
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$this->preLoadInterpolations[$scope] = true; |
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$locations = $this->params->getLocations($scope); |
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$sources = $this->params->getSources($scope); |
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$loader = $this->params->getLoader($scope); |
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if (!$loader instanceof ArrayConfigLoader) { |
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$sources = $this->interpolateConfigValues($sources); |
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} |
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$locations = $this->interpolateConfigValues($locations); |
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unset($this->preLoadInterpolations[$scope]); |
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$this->config[$scope] = $loader->load($locations, $sources); |
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return $this->interpolateConfigValues($this->config[$scope]); |
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} |
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private function resolvePath(ConfigPathInterface $path) |
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{ |
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$scope = $path->getScope(); |
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if (!isset($this->config[$scope])) { |
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return null; |
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} |
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$value = &$this->config[$scope]; |
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$pathParts = $path->getParts(); |
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$pathLen = $path->getLength(); |
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$pathPos = 0; |
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while (!empty($pathParts)) { |
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$pathPart = array_shift($pathParts); |
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$pathPos++; |
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if (!isset($value[$pathPart])) { |
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if ($pathPos === $pathLen) { |
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return null; |
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} else { |
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array_unshift($pathParts, $pathPart.$path->getSeparator().array_shift($pathParts)); |
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continue; |
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} |
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} |
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if (!is_array($value)) { |
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throw new \Exception(sprintf('Trying to traverse non array-value with path: "%s"', $path)); |
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} |
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$value = &$value[$pathPart]; |
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} |
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return $value; |
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} |
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private function interpolateConfigValues(array $config): array |
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{ |
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foreach ($config as $key => $value) { |
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if (is_array($value)) { |
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$config[$key] = $this->interpolateConfigValues($value); |
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} elseif (is_string($value) && preg_match_all(self::INTERPOLATION_PATTERN, $value, $matches)) { |
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$replacements = []; |
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foreach ($matches[2] as $configKey) { |
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$replacements[] = $this->get($configKey); |
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} |
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$config[$key] = str_replace($matches[0], $replacements, $value); |
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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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daikon-cqrs /
config
