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<?php |
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namespace Palmtree\Container; |
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use Palmtree\Container\Exception\ParameterNotFoundException; |
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use Palmtree\Container\Exception\ServiceNotFoundException; |
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use Palmtree\Container\Exception\ServiceNotPublicException; |
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class Resolver |
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{ |
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/** Regex for single parameters e.g '%my.parameter%' */ |
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private const PATTERN_PARAMETER = '/^%([^%\s]+)%$/'; |
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/** Regex for multiple parameters in a string */ |
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private const PATTERN_MULTI_PARAMETER = '/%%|%([^%\s]+)%/'; |
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/** @var Container */ |
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private $container; |
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/** @var array */ |
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private $containerServices; |
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/** @var array */ |
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private $envCache = []; |
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public function __construct(Container $container, array &$containerServices) |
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{ |
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$this->container = $container; |
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$this->containerServices = &$containerServices; |
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} |
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public function resolveArgs(array $args): array |
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{ |
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foreach ($args as $key => &$arg) { |
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if (\is_array($arg)) { |
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$arg = $this->resolveArgs($arg); |
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} else { |
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$arg = $this->resolveArg($arg); |
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} |
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} |
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return $args; |
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} |
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/** |
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* @param mixed $arg |
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* |
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* @return mixed |
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* |
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* @throws ServiceNotFoundException |
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* @throws ParameterNotFoundException |
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*/ |
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public function resolveArg($arg) |
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{ |
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if (!\is_string($arg) || $arg === '') { |
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return $arg; |
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} |
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if ($arg[0] === '@') { |
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return $this->inject(substr($arg, 1)); |
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} |
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return $this->resolveParameter($arg); |
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} |
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/** |
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* @return mixed |
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* |
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* @throws ServiceNotFoundException |
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*/ |
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private function inject(string $key) |
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{ |
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try { |
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$this->container->get($key); |
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} catch (ServiceNotPublicException $e) { |
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// Ensures the service is created. Private services are allowed to be injected. |
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} |
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return $this->containerServices[$key]; |
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} |
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/** |
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* @param string $arg |
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* |
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* @return mixed |
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* |
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* @throws ParameterNotFoundException |
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*/ |
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private function resolveParameter($arg) |
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{ |
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// Resolve a single parameter value e.g %my_param% |
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// Used for non-string values (boolean, integer etc) |
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if (preg_match(self::PATTERN_PARAMETER, $arg, $matches)) { |
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$envKey = $this->getEnvParameterKey($matches[1]); |
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if ($envKey !== null) { |
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return $this->getEnv($envKey); |
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} |
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$constKey = $this->getConstParameterKey($matches[1]); |
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if ($constKey !== null) { |
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return \constant($constKey); |
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} |
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return $this->container->getParameter($matches[1]); |
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} |
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// Resolve multiple parameters in a string e.g /%parent_dir%/somewhere/%child_dir% |
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return preg_replace_callback(self::PATTERN_MULTI_PARAMETER, function ($matches) { |
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// Skip %% to allow escaping percent signs |
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if (!isset($matches[1])) { |
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return '%'; |
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} |
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if ($envKey = $this->getEnvParameterKey($matches[1])) { |
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return $this->getEnv($envKey); |
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} |
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if ($constKey = $this->getConstParameterKey($matches[1])) { |
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return \constant($constKey); |
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} |
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return $this->container->getParameter($matches[1]); |
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}, $arg); |
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} |
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private function getEnvParameterKey(string $value): ?string |
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{ |
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if (strpos($value, 'env(') === 0 && substr($value, -1) === ')' && $value !== 'env()') { |
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return substr($value, 4, -1); |
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} |
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return null; |
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} |
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private function getConstParameterKey(string $value): ?string |
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{ |
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if (strpos($value, 'constant(') === 0 && substr($value, -1) === ')' && $value !== 'constant()') { |
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return substr($value, 9, -1); |
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} |
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return null; |
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} |
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/** |
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* @return string|bool |
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*/ |
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private function getEnv(string $key) |
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{ |
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if (isset($this->envCache[$key]) || \array_key_exists($key, $this->envCache)) { |
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return $this->envCache[$key]; |
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} |
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if (!$envVar = getenv($key)) { |
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try { |
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$envVar = $this->resolveArg($this->container->getParameter("env($key)")); |
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} catch (ParameterNotFoundException $exception) { |
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// do nothing |
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} |
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} |
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$this->envCache[$key] = $envVar; |
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return $this->envCache[$key]; |
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} |
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} |
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palmtreephp /
container
