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<?php
/**
* League.Uri (https://uri.thephpleague.com)
*
* (c) Ignace Nyamagana Butera <nyamsprod@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
declare(strict_types=1);
namespace League\Uri\UriTemplate;
use ArrayAccess;
use Countable;
use League\Uri\Exceptions\TemplateCanNotBeExpanded;
use Stringable;
use function is_bool;
use function is_object;
use function is_scalar;
/**
* @implements ArrayAccess<string, string|bool|int|float|array<string|bool|int|float>>
*/
final class VariableBag implements ArrayAccess, Countable
{
/**
* @var array<string,string|array<string>>
*/
private array $variables = [];
/**
* @param iterable<string,string|bool|int|float|array<string|bool|int|float>> $variables
*/
public function __construct(iterable $variables = [])
{
foreach ($variables as $name => $value) {
$this->assign($name, $value);
}
}
public function count(): int
{
return count($this->variables);
}
/**
* @param array{variables: array<string,string|array<string>>} $properties
*/
public static function __set_state(array $properties): self
{
return new self($properties['variables']);
}
public function offsetExists(mixed $offset): bool
{
return array_key_exists($offset, $this->variables);
}
public function offsetUnset(mixed $offset): void
{
unset($this->variables[$offset]);
}
public function offsetSet(mixed $offset, mixed $value): void
{
$this->assign($offset, $value); /* @phpstan-ignore-line */
}
public function offsetGet(mixed $offset): mixed
{
return $this->fetch($offset);
}
/**
* @return array<string,string|array<string>>
*/
public function all(): array
{
return $this->variables;
}
/**
* Tells whether the bag is empty or not.
*/
public function isEmpty(): bool
{
return [] === $this->variables;
}
/**
* Fetches the variable value if none found returns null.
*
* @return null|string|array<string>
*/
public function fetch(string $name): null|string|array
{
return $this->variables[$name] ?? null;
}
/**
* @param string|bool|int|float|null|array<string|bool|int|float> $value
*/
public function assign(string $name, string|bool|int|float|array|null $value): void
{
$this->variables[$name] = $this->normalizeValue($value, $name, true);
}
/**
* @param Stringable|string|float|int|bool|null $value the value to be expanded
*
* @throws TemplateCanNotBeExpanded if the value contains nested list
*/
private function normalizeValue(Stringable|array|string|float|int|bool|null $value, string $name, bool $isNestedListAllowed): array|string
{
return match (true) {
is_bool($value) => true === $value ? '1' : '0',
(null === $value || is_scalar($value) || is_object($value)) => (string) $value,
!$isNestedListAllowed => throw TemplateCanNotBeExpanded::dueToNestedListOfValue($name),
default => array_map(fn ($var): array|string => self::normalizeValue($var, $name, false), $value),
};
}
/**
* Replaces elements from passed variables into the current instance.
*/
public function replace(VariableBag $variables): self
{
return new self($this->variables + $variables->variables);
}
}
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