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\ParameterNotFoundException;
Chris@0: use Symfony\Component\DependencyInjection\Exception\ParameterCircularReferenceException;
Chris@0: use Symfony\Component\DependencyInjection\Exception\RuntimeException;
Chris@0: 
Chris@0: /**
Chris@0:  * Holds parameters.
Chris@0:  *
Chris@0:  * @author Fabien Potencier <fabien@symfony.com>
Chris@0:  */
Chris@0: class ParameterBag implements ParameterBagInterface
Chris@0: {
Chris@0:     protected $parameters = array();
Chris@0:     protected $resolved = false;
Chris@0: 
Chris@0:     /**
Chris@0:      * @param array $parameters An array of parameters
Chris@0:      */
Chris@0:     public function __construct(array $parameters = array())
Chris@0:     {
Chris@0:         $this->add($parameters);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Clears all parameters.
Chris@0:      */
Chris@0:     public function clear()
Chris@0:     {
Chris@0:         $this->parameters = array();
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Adds parameters to the service container parameters.
Chris@0:      *
Chris@0:      * @param array $parameters An array of parameters
Chris@0:      */
Chris@0:     public function add(array $parameters)
Chris@0:     {
Chris@0:         foreach ($parameters as $key => $value) {
Chris@0:             $this->parameters[strtolower($key)] = $value;
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function all()
Chris@0:     {
Chris@0:         return $this->parameters;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function get($name)
Chris@0:     {
Chris@0:         $name = strtolower($name);
Chris@0: 
Chris@0:         if (!array_key_exists($name, $this->parameters)) {
Chris@0:             if (!$name) {
Chris@0:                 throw new ParameterNotFoundException($name);
Chris@0:             }
Chris@0: 
Chris@0:             $alternatives = array();
Chris@0:             foreach ($this->parameters as $key => $parameterValue) {
Chris@0:                 $lev = levenshtein($name, $key);
Chris@0:                 if ($lev <= strlen($name) / 3 || false !== strpos($key, $name)) {
Chris@0:                     $alternatives[] = $key;
Chris@0:                 }
Chris@0:             }
Chris@0: 
Chris@0:             $nonNestedAlternative = null;
Chris@0:             if (!count($alternatives) && false !== strpos($name, '.')) {
Chris@0:                 $namePartsLength = array_map('strlen', explode('.', $name));
Chris@0:                 $key = substr($name, 0, -1 * (1 + array_pop($namePartsLength)));
Chris@0:                 while (count($namePartsLength)) {
Chris@0:                     if ($this->has($key)) {
Chris@0:                         if (is_array($this->get($key))) {
Chris@0:                             $nonNestedAlternative = $key;
Chris@0:                         }
Chris@0:                         break;
Chris@0:                     }
Chris@0: 
Chris@0:                     $key = substr($key, 0, -1 * (1 + array_pop($namePartsLength)));
Chris@0:                 }
Chris@0:             }
Chris@0: 
Chris@0:             throw new ParameterNotFoundException($name, null, null, null, $alternatives, $nonNestedAlternative);
Chris@0:         }
Chris@0: 
Chris@0:         return $this->parameters[$name];
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Sets a service container parameter.
Chris@0:      *
Chris@0:      * @param string $name  The parameter name
Chris@0:      * @param mixed  $value The parameter value
Chris@0:      */
Chris@0:     public function set($name, $value)
Chris@0:     {
Chris@0:         $this->parameters[strtolower($name)] = $value;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function has($name)
Chris@0:     {
Chris@0:         return array_key_exists(strtolower($name), $this->parameters);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Removes a parameter.
Chris@0:      *
Chris@0:      * @param string $name The parameter name
Chris@0:      */
Chris@0:     public function remove($name)
Chris@0:     {
Chris@0:         unset($this->parameters[strtolower($name)]);
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: 
Chris@0:         $parameters = array();
Chris@0:         foreach ($this->parameters as $key => $value) {
Chris@0:             try {
Chris@0:                 $value = $this->resolveValue($value);
Chris@0:                 $parameters[$key] = $this->unescapeValue($value);
Chris@0:             } catch (ParameterNotFoundException $e) {
Chris@0:                 $e->setSourceKey($key);
Chris@0: 
Chris@0:                 throw $e;
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         $this->parameters = $parameters;
Chris@0:         $this->resolved = true;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Replaces parameter placeholders (%name%) by their values.
Chris@0:      *
Chris@0:      * @param mixed $value     A value
Chris@0:      * @param array $resolving An array of keys that are being resolved (used internally to detect circular references)
Chris@0:      *
Chris@0:      * @return mixed The resolved value
Chris@0:      *
Chris@0:      * @throws ParameterNotFoundException          if a placeholder references a parameter that does not exist
Chris@0:      * @throws ParameterCircularReferenceException if a circular reference if detected
Chris@0:      * @throws RuntimeException                    when a given parameter has a type problem.
Chris@0:      */
Chris@0:     public function resolveValue($value, array $resolving = array())
Chris@0:     {
Chris@0:         if (is_array($value)) {
Chris@0:             $args = array();
Chris@0:             foreach ($value as $k => $v) {
Chris@0:                 $args[$this->resolveValue($k, $resolving)] = $this->resolveValue($v, $resolving);
Chris@0:             }
Chris@0: 
Chris@0:             return $args;
Chris@0:         }
Chris@0: 
Chris@0:         if (!is_string($value)) {
Chris@0:             return $value;
Chris@0:         }
Chris@0: 
Chris@0:         return $this->resolveString($value, $resolving);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Resolves parameters inside a string.
Chris@0:      *
Chris@0:      * @param string $value     The string to resolve
Chris@0:      * @param array  $resolving An array of keys that are being resolved (used internally to detect circular references)
Chris@0:      *
Chris@0:      * @return string The resolved string
Chris@0:      *
Chris@0:      * @throws ParameterNotFoundException          if a placeholder references a parameter that does not exist
Chris@0:      * @throws ParameterCircularReferenceException if a circular reference if detected
Chris@0:      * @throws RuntimeException                    when a given parameter has a type problem.
Chris@0:      */
Chris@0:     public function resolveString($value, array $resolving = array())
Chris@0:     {
Chris@0:         // we do this to deal with non string values (Boolean, integer, ...)
Chris@0:         // as the preg_replace_callback throw an exception when trying
Chris@0:         // a non-string in a parameter value
Chris@0:         if (preg_match('/^%([^%\s]+)%$/', $value, $match)) {
Chris@0:             $key = $match[1];
Chris@0:             $lcKey = strtolower($key);
Chris@0: 
Chris@0:             if (isset($resolving[$lcKey])) {
Chris@0:                 throw new ParameterCircularReferenceException(array_keys($resolving));
Chris@0:             }
Chris@0: 
Chris@0:             $resolving[$lcKey] = true;
Chris@0: 
Chris@0:             return $this->resolved ? $this->get($key) : $this->resolveValue($this->get($key), $resolving);
Chris@0:         }
Chris@0: 
Chris@0:         return preg_replace_callback('/%%|%([^%\s]+)%/', function ($match) use ($resolving, $value) {
Chris@0:             // skip %%
Chris@0:             if (!isset($match[1])) {
Chris@0:                 return '%%';
Chris@0:             }
Chris@0: 
Chris@0:             $key = $match[1];
Chris@0:             $lcKey = strtolower($key);
Chris@0:             if (isset($resolving[$lcKey])) {
Chris@0:                 throw new ParameterCircularReferenceException(array_keys($resolving));
Chris@0:             }
Chris@0: 
Chris@0:             $resolved = $this->get($key);
Chris@0: 
Chris@0:             if (!is_string($resolved) && !is_numeric($resolved)) {
Chris@0:                 throw new RuntimeException(sprintf('A string value must be composed of strings and/or numbers, but found parameter "%s" of type %s inside string value "%s".', $key, gettype($resolved), $value));
Chris@0:             }
Chris@0: 
Chris@0:             $resolved = (string) $resolved;
Chris@0:             $resolving[$lcKey] = true;
Chris@0: 
Chris@0:             return $this->isResolved() ? $resolved : $this->resolveString($resolved, $resolving);
Chris@0:         }, $value);
Chris@0:     }
Chris@0: 
Chris@0:     public function isResolved()
Chris@0:     {
Chris@0:         return $this->resolved;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function escapeValue($value)
Chris@0:     {
Chris@0:         if (is_string($value)) {
Chris@0:             return str_replace('%', '%%', $value);
Chris@0:         }
Chris@0: 
Chris@0:         if (is_array($value)) {
Chris@0:             $result = array();
Chris@0:             foreach ($value as $k => $v) {
Chris@0:                 $result[$k] = $this->escapeValue($v);
Chris@0:             }
Chris@0: 
Chris@0:             return $result;
Chris@0:         }
Chris@0: 
Chris@0:         return $value;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function unescapeValue($value)
Chris@0:     {
Chris@0:         if (is_string($value)) {
Chris@0:             return str_replace('%%', '%', $value);
Chris@0:         }
Chris@0: 
Chris@0:         if (is_array($value)) {
Chris@0:             $result = array();
Chris@0:             foreach ($value as $k => $v) {
Chris@0:                 $result[$k] = $this->unescapeValue($v);
Chris@0:             }
Chris@0: 
Chris@0:             return $result;
Chris@0:         }
Chris@0: 
Chris@0:         return $value;
Chris@0:     }
Chris@0: }