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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\HttpFoundation;
use Symfony\Component\HttpFoundation\Exception\BadRequestException;
use Symfony\Component\HttpFoundation\Exception\UnexpectedValueException;
/**
* ParameterBag is a container for key/value pairs.
*
* @author Fabien Potencier <fabien@symfony.com>
*
* @implements \IteratorAggregate<string, mixed>
*/
class ParameterBag implements \IteratorAggregate, \Countable
{
/**
* @param array<string, mixed> $parameters
*/
public function __construct(
protected array $parameters = [],
) {
}
/**
* Returns the parameters.
*
* @template TKey of string|null
*
* @param TKey $key The name of the parameter to return or null to get them all
*
* @return (TKey is null ? array<string, mixed> : array<mixed>)
*
* @throws BadRequestException if the value is not an array
*/
public function all(?string $key = null): array
{
if (null === $key) {
return $this->parameters;
}
if (!\is_array($value = $this->parameters[$key] ?? [])) {
throw new BadRequestException(\sprintf('Unexpected value for parameter "%s": expecting "array", got "%s".', $key, get_debug_type($value)));
}
return $value;
}
/**
* Returns the parameter keys.
*
* @return list<string>
*/
public function keys(): array
{
return array_keys($this->parameters);
}
/**
* Replaces the current parameters by a new set.
*
* @param array<string, mixed> $parameters
*/
public function replace(array $parameters = []): void
{
$this->parameters = $parameters;
}
/**
* Adds parameters.
*
* @param array<string, mixed> $parameters
*/
public function add(array $parameters = []): void
{
$this->parameters = array_replace($this->parameters, $parameters);
}
public function get(string $key, mixed $default = null): mixed
{
return \array_key_exists($key, $this->parameters) ? $this->parameters[$key] : $default;
}
public function set(string $key, mixed $value): void
{
$this->parameters[$key] = $value;
}
/**
* Returns true if the parameter is defined.
*/
public function has(string $key): bool
{
return \array_key_exists($key, $this->parameters);
}
/**
* Removes a parameter.
*/
public function remove(string $key): void
{
unset($this->parameters[$key]);
}
/**
* Returns the alphabetic characters of the parameter value.
*
* @throws UnexpectedValueException if the value cannot be converted to string
*/
public function getAlpha(string $key, string $default = ''): string
{
return preg_replace('/[^[:alpha:]]/', '', $this->getString($key, $default));
}
/**
* Returns the alphabetic characters and digits of the parameter value.
*
* @throws UnexpectedValueException if the value cannot be converted to string
*/
public function getAlnum(string $key, string $default = ''): string
{
return preg_replace('/[^[:alnum:]]/', '', $this->getString($key, $default));
}
/**
* Returns the digits of the parameter value.
*
* @throws UnexpectedValueException if the value cannot be converted to string
*/
public function getDigits(string $key, string $default = ''): string
{
return preg_replace('/[^[:digit:]]/', '', $this->getString($key, $default));
}
/**
* Returns the parameter as string.
*
* @throws UnexpectedValueException if the value cannot be converted to string
*/
public function getString(string $key, string $default = ''): string
{
$value = $this->get($key, $default);
if (!\is_scalar($value) && !$value instanceof \Stringable) {
throw new UnexpectedValueException(\sprintf('Parameter value "%s" cannot be converted to "string".', $key));
}
return (string) $value;
}
/**
* Returns the parameter value converted to integer.
*
* @throws UnexpectedValueException if the value cannot be converted to integer
*/
public function getInt(string $key, int $default = 0): int
{
return $this->filter($key, $default, \FILTER_VALIDATE_INT, ['flags' => \FILTER_REQUIRE_SCALAR]);
}
/**
* Returns the parameter value converted to boolean.
*
* @throws UnexpectedValueException if the value cannot be converted to a boolean
*/
public function getBoolean(string $key, bool $default = false): bool
{
return $this->filter($key, $default, \FILTER_VALIDATE_BOOL, ['flags' => \FILTER_REQUIRE_SCALAR]);
}
/**
* Returns the parameter value converted to an enum.
*
* @template T of \BackedEnum
*
* @param class-string<T> $class
* @param ?T $default
*
* @return ?T
*
* @psalm-return ($default is null ? T|null : T)
*
* @throws UnexpectedValueException if the parameter value cannot be converted to an enum
*/
public function getEnum(string $key, string $class, ?\BackedEnum $default = null): ?\BackedEnum
{
$value = $this->get($key);
if (null === $value) {
return $default;
}
try {
return $class::from($value);
} catch (\ValueError|\TypeError $e) {
throw new UnexpectedValueException(\sprintf('Parameter "%s" cannot be converted to enum: ', $key).$e->getMessage().'.', $e->getCode(), $e);
}
}
/**
* Filter key.
*
* @param int $filter FILTER_* constant
* @param int|array{flags?: int, options?: array} $options Flags from FILTER_* constants
*
* @see https://php.net/filter-var
*
* @throws UnexpectedValueException if the parameter value is a non-stringable object
* @throws UnexpectedValueException if the parameter value is invalid and \FILTER_NULL_ON_FAILURE is not set
*/
public function filter(string $key, mixed $default = null, int $filter = \FILTER_DEFAULT, mixed $options = []): mixed
{
$value = $this->get($key, $default);
// Always turn $options into an array - this allows filter_var option shortcuts.
if (!\is_array($options) && $options) {
$options = ['flags' => $options];
}
// Add a convenience check for arrays.
if (\is_array($value) && !isset($options['flags'])) {
$options['flags'] = \FILTER_REQUIRE_ARRAY;
}
if (\is_object($value) && !$value instanceof \Stringable) {
throw new UnexpectedValueException(\sprintf('Parameter value "%s" cannot be filtered.', $key));
}
if ((\FILTER_CALLBACK & $filter) && !(($options['options'] ?? null) instanceof \Closure)) {
throw new \InvalidArgumentException(\sprintf('A Closure must be passed to "%s()" when FILTER_CALLBACK is used, "%s" given.', __METHOD__, get_debug_type($options['options'] ?? null)));
}
$options['flags'] ??= 0;
$nullOnFailure = $options['flags'] & \FILTER_NULL_ON_FAILURE;
$options['flags'] |= \FILTER_NULL_ON_FAILURE;
$value = filter_var($value, $filter, $options);
if (null !== $value || $nullOnFailure) {
return $value;
}
throw new \UnexpectedValueException(\sprintf('Parameter value "%s" is invalid and flag "FILTER_NULL_ON_FAILURE" was not set.', $key));
}
/**
* Returns an iterator for parameters.
*
* @return \ArrayIterator<string, mixed>
*/
public function getIterator(): \ArrayIterator
{
return new \ArrayIterator($this->parameters);
}
/**
* Returns the number of parameters.
*/
public function count(): int
{
return \count($this->parameters);
}
}