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<?php |
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declare(strict_types=1); |
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namespace Frostaly\VarExporter; |
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use Frostaly\VarExporter\Contracts\EncoderInterface; |
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use Frostaly\VarExporter\Exception\CircularReferenceException; |
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use Frostaly\VarExporter\Exception\TypeNotSupportedException; |
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use WeakMap; |
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final class Encoder |
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{ |
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/** |
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* @var WeakMap<object,array|int> |
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*/ |
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private WeakMap $encoded; |
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/** |
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* @param EncoderInterface[] $encoders |
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*/ |
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public function __construct( |
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private array $encoders, |
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) { |
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$this->encoded = new WeakMap(); |
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} |
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/** |
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* Encode the value to a formatted array of PHP code. |
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*/ |
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public function encode(mixed $value): array |
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{ |
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return is_object($value) |
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? $this->encodeObject($value) |
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: $this->tryEncode($value); |
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} |
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/** |
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* Detect circular references and cache the encoded object. |
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*/ |
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private function encodeObject(object $object): array |
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{ |
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if (!is_array($this->encoded[$object] ??= 0)) { |
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if (is_int($this->encoded[$object]) && $this->encoded[$object]++) { |
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throw new CircularReferenceException($object::class); |
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} |
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$this->encoded[$object] = $this->tryEncode($object); |
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} |
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return $this->encoded[$object]; /** @phpstan-ignore-line */ |
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} |
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/** |
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* Try encoding the value using the registered encoders. |
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*/ |
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private function tryEncode(mixed $value): array |
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{ |
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foreach ($this->encoders as $encoder) { |
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if ($encoder->supports($value)) { |
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return $encoder->encode($this, $value); |
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} |
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} |
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throw new TypeNotSupportedException($value); |
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} |
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} |
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frostaly /
var-exporter
