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<?php
declare(strict_types=1);
namespace MaxBeckers\AmazonAlexa\Response\Directives\APL\Document;
class StyleValue implements \JsonSerializable
{
/**
* When is an optional APL boolean expression controlling whether this style value block applies.
* If null, the block always applies.
*/
public function __construct(
public ?string $when = null,
public array $properties = [],
) {
}
public function set(string $name, mixed $value): self
if ($name === 'when') {
$this->when = is_string($value) ? $value : null;
} else {
$this->properties[$name] = $value;
return $this;
public function jsonSerialize(): array
$out = $this->properties;
if ($this->when !== null && $this->when !== '') {
// Ensure 'when' appears first for readability (JSON object order not semantically relevant).
$out = ['when' => $this->when] + $out;
return $out;
maxbeckers /
amazon-alexa-php
