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<?php |
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namespace Zenstruck\Callback; |
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use Zenstruck\Callback\Exception\UnresolveableArgument; |
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use Zenstruck\Callback\Parameter\TypedParameter; |
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use Zenstruck\Callback\Parameter\UnionParameter; |
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use Zenstruck\Callback\Parameter\UntypedParameter; |
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/** |
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* @author Kevin Bond <[email protected]> |
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*/ |
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abstract class Parameter |
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{ |
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/** @var bool */ |
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private $optional = false; |
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/** |
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* @see UnionParameter::__construct() |
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*/ |
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final public static function union(self ...$parameters): self |
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{ |
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return new UnionParameter(...$parameters); |
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} |
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/** |
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* @see TypedParameter::__construct() |
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*/ |
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final public static function typed(string $type, $value, int $options = Argument::EXACT|Argument::COVARIANCE|Argument::CONTRAVARIANCE|Argument::VERY_STRICT): self |
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{ |
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return new TypedParameter($type, $value, $options); |
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} |
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/** |
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* @see UntypedParameter::__construct() |
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*/ |
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final public static function untyped($value): self |
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{ |
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return new UntypedParameter($value); |
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} |
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/** |
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* @see ValueFactory::__construct() |
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*/ |
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final public static function factory(callable $factory): ValueFactory |
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{ |
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return new ValueFactory($factory); |
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} |
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final public function optional(): self |
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{ |
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$this->optional = true; |
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return $this; |
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} |
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/** |
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* @internal |
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* |
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* @return mixed |
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* |
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* @throws UnresolveableArgument |
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*/ |
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final public function resolve(Argument $argument) |
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{ |
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try { |
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$value = $this->valueFor($argument); |
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} catch (UnresolveableArgument $e) { |
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if ($argument->isOptional()) { |
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return $argument->defaultValue(); |
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} |
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throw $e; |
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} |
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if ($value instanceof ValueFactory) { |
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$value = $value($argument); |
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} |
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if (!$argument->allows($value)) { |
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throw new UnresolveableArgument(\sprintf('Unable to resolve argument. Expected "%s", got "%s".', $argument->type(), get_debug_type($value))); |
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} |
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return $value; |
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} |
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/** |
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* @internal |
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*/ |
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final public function isOptional(): bool |
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{ |
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return $this->optional; |
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} |
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abstract public function type(): string; |
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abstract protected function valueFor(Argument $argument); |
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} |
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zenstruck /
callback
