Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Symfony package.
Chris@0:  *
Chris@0:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Symfony\Component\DependencyInjection\ParameterBag;
Chris@0: 
Chris@0: use Symfony\Component\DependencyInjection\Exception\RuntimeException;
Chris@0: use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
Chris@0: 
Chris@0: /**
Chris@0:  * @author Nicolas Grekas <p@tchwork.com>
Chris@0:  */
Chris@0: class EnvPlaceholderParameterBag extends ParameterBag
Chris@0: {
Chris@0:     private $envPlaceholders = array();
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function get($name)
Chris@0:     {
Chris@0:         if (0 === strpos($name, 'env(') && ')' === substr($name, -1) && 'env()' !== $name) {
Chris@0:             $env = substr($name, 4, -1);
Chris@0: 
Chris@0:             if (isset($this->envPlaceholders[$env])) {
Chris@0:                 foreach ($this->envPlaceholders[$env] as $placeholder) {
Chris@0:                     return $placeholder; // return first result
Chris@0:                 }
Chris@0:             }
Chris@0:             if (preg_match('/\W/', $env)) {
Chris@0:                 throw new InvalidArgumentException(sprintf('Invalid %s name: only "word" characters are allowed.', $name));
Chris@0:             }
Chris@0: 
Chris@0:             if ($this->has($name)) {
Chris@0:                 $defaultValue = parent::get($name);
Chris@0: 
Chris@0:                 if (null !== $defaultValue && !is_scalar($defaultValue)) {
Chris@0:                     throw new RuntimeException(sprintf('The default value of an env() parameter must be scalar or null, but "%s" given to "%s".', gettype($defaultValue), $name));
Chris@0:                 }
Chris@0:             }
Chris@0: 
Chris@0:             $uniqueName = md5($name.uniqid(mt_rand(), true));
Chris@0:             $placeholder = sprintf('env_%s_%s', $env, $uniqueName);
Chris@0:             $this->envPlaceholders[$env][$placeholder] = $placeholder;
Chris@0: 
Chris@0:             return $placeholder;
Chris@0:         }
Chris@0: 
Chris@0:         return parent::get($name);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Returns the map of env vars used in the resolved parameter values to their placeholders.
Chris@0:      *
Chris@0:      * @return string[][] A map of env var names to their placeholders
Chris@0:      */
Chris@0:     public function getEnvPlaceholders()
Chris@0:     {
Chris@0:         return $this->envPlaceholders;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Merges the env placeholders of another EnvPlaceholderParameterBag.
Chris@0:      */
Chris@0:     public function mergeEnvPlaceholders(self $bag)
Chris@0:     {
Chris@0:         if ($newPlaceholders = $bag->getEnvPlaceholders()) {
Chris@0:             $this->envPlaceholders += $newPlaceholders;
Chris@0: 
Chris@0:             foreach ($newPlaceholders as $env => $placeholders) {
Chris@0:                 $this->envPlaceholders[$env] += $placeholders;
Chris@0:             }
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function resolve()
Chris@0:     {
Chris@0:         if ($this->resolved) {
Chris@0:             return;
Chris@0:         }
Chris@0:         parent::resolve();
Chris@0: 
Chris@0:         foreach ($this->envPlaceholders as $env => $placeholders) {
Chris@0:             if (!isset($this->parameters[$name = strtolower("env($env)")])) {
Chris@0:                 continue;
Chris@0:             }
Chris@0:             if (is_numeric($default = $this->parameters[$name])) {
Chris@0:                 $this->parameters[$name] = (string) $default;
Chris@0:             } elseif (null !== $default && !is_scalar($default)) {
Chris@0:                 throw new RuntimeException(sprintf('The default value of env parameter "%s" must be scalar or null, %s given.', $env, gettype($default)));
Chris@0:             }
Chris@0:         }
Chris@0:     }
Chris@0: }