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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\DependencyInjection\ParameterBag;
use Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException;
use Symfony\Component\DependencyInjection\Exception\ParameterCircularReferenceException;
use Symfony\Component\DependencyInjection\Exception\RuntimeException;
/**
* Holds parameters.
*
* @author Fabien Potencier <fabien@symfony.com>
*
* @api
*/
class ParameterBag implements ParameterBagInterface
{
protected $parameters = array();
protected $resolved = false;
/**
* Constructor.
*
* @param array $parameters An array of parameters
*
* @api
*/
public function __construct(array $parameters = array())
{
$this->add($parameters);
}
/**
* Clears all parameters.
*
* @api
*/
public function clear()
{
$this->parameters = array();
}
/**
* Adds parameters to the service container parameters.
*
* @param array $parameters An array of parameters
*
* @api
*/
public function add(array $parameters)
{
foreach ($parameters as $key => $value) {
$this->parameters[strtolower($key)] = $value;
}
}
/**
* Gets the service container parameters.
*
* @return array An array of parameters
*
* @api
*/
public function all()
{
return $this->parameters;
}
/**
* Gets a service container parameter.
*
* @param string $name The parameter name
*
* @return mixed The parameter value
*
* @throws ParameterNotFoundException if the parameter is not defined
*
* @api
*/
public function get($name)
{
$name = strtolower($name);
if (!array_key_exists($name, $this->parameters)) {
if (!$name) {
throw new ParameterNotFoundException($name);
}
$alternatives = array();
foreach (array_keys($this->parameters) as $key) {
$lev = levenshtein($name, $key);
if ($lev <= strlen($name) / 3 || false !== strpos($key, $name)) {
$alternatives[] = $key;
}
}
throw new ParameterNotFoundException($name, null, null, null, $alternatives);
}
return $this->parameters[$name];
}
/**
* Sets a service container parameter.
*
* @param string $name The parameter name
* @param mixed $value The parameter value
*
* @api
*/
public function set($name, $value)
{
$this->parameters[strtolower($name)] = $value;
}
/**
* Returns true if a parameter name is defined.
*
* @param string $name The parameter name
*
* @return Boolean true if the parameter name is defined, false otherwise
*
* @api
*/
public function has($name)
{
return array_key_exists(strtolower($name), $this->parameters);
}
/**
* Removes a parameter.
*
* @param string $name The parameter name
*
* @api
*/
public function remove($name)
{
unset($this->parameters[strtolower($name)]);
}
/**
* Replaces parameter placeholders (%name%) by their values for all parameters.
*/
public function resolve()
{
if ($this->resolved) {
return;
}
$parameters = array();
foreach ($this->parameters as $key => $value) {
try {
$value = $this->resolveValue($value);
$parameters[$key] = $this->unescapeValue($value);
} catch (ParameterNotFoundException $e) {
$e->setSourceKey($key);
throw $e;
}
}
$this->parameters = $parameters;
$this->resolved = true;
}
/**
* Replaces parameter placeholders (%name%) by their values.
*
* @param mixed $value A value
* @param array $resolving An array of keys that are being resolved (used internally to detect circular references)
*
* @return mixed The resolved value
*
* @throws ParameterNotFoundException if a placeholder references a parameter that does not exist
* @throws ParameterCircularReferenceException if a circular reference if detected
* @throws RuntimeException when a given parameter has a type problem.
*/
public function resolveValue($value, array $resolving = array())
{
if (is_array($value)) {
$args = array();
foreach ($value as $k => $v) {
$args[$this->resolveValue($k, $resolving)] = $this->resolveValue($v, $resolving);
}
return $args;
}
if (!is_string($value)) {
return $value;
}
return $this->resolveString($value, $resolving);
}
/**
* Resolves parameters inside a string
*
* @param string $value The string to resolve
* @param array $resolving An array of keys that are being resolved (used internally to detect circular references)
*
* @return string The resolved string
*
* @throws ParameterNotFoundException if a placeholder references a parameter that does not exist
* @throws ParameterCircularReferenceException if a circular reference if detected
* @throws RuntimeException when a given parameter has a type problem.
*/
public function resolveString($value, array $resolving = array())
{
// we do this to deal with non string values (Boolean, integer, ...)
// as the preg_replace_callback throw an exception when trying
// a non-string in a parameter value
if (preg_match('/^%([^%\s]+)%$/', $value, $match)) {
$key = strtolower($match[1]);
if (isset($resolving[$key])) {
throw new ParameterCircularReferenceException(array_keys($resolving));
}
$resolving[$key] = true;
return $this->resolved ? $this->get($key) : $this->resolveValue($this->get($key), $resolving);
}
$self = $this;
return preg_replace_callback('/%%|%([^%\s]+)%/', function ($match) use ($self, $resolving, $value) {
// skip %%
if (!isset($match[1])) {
return '%%';
}
$key = strtolower($match[1]);
if (isset($resolving[$key])) {
throw new ParameterCircularReferenceException(array_keys($resolving));
}
$resolved = $self->get($key);
if (!is_string($resolved) && !is_numeric($resolved)) {
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));
}
$resolved = (string) $resolved;
$resolving[$key] = true;
return $self->isResolved() ? $resolved : $self->resolveString($resolved, $resolving);
}, $value);
}
public function isResolved()
{
return $this->resolved;
}
/**
* {@inheritDoc}
*/
public function escapeValue($value)
{
if (is_string($value)) {
return str_replace('%', '%%', $value);
}
if (is_array($value)) {
$result = array();
foreach ($value as $k => $v) {
$result[$k] = $this->escapeValue($v);
}
return $result;
}
return $value;
}
public function unescapeValue($value)
{
if (is_string($value)) {
return str_replace('%%', '%', $value);
}
if (is_array($value)) {
$result = array();
foreach ($value as $k => $v) {
$result[$k] = $this->unescapeValue($v);
}
return $result;
}
return $value;
}
}