Online PHP editor | refs for 6KOo4

<?php /********************** OBJECTS **********************/ interface OldInterface {} class OldA implements OldInterface {} class OldB implements OldInterface {} interface NewInterface {} class NewA implements NewInterface {} class NewB implements NewInterface {} /********************** CONVERTERS **********************/ interface ConverterInterface { public function supports(OldInterface $old): bool; public function convert(OldInterface $old): NewInterface; } class AConverter implements ConverterInterface { public function supports(OldInterface $old): bool { return $old instanceof OldA; } public function convert(OldInterface $old): NewInterface { return new NewA(); } } class BConverter implements ConverterInterface { public function supports(OldInterface $old): bool { return $old instanceof OldB; } public function convert(OldInterface $old): NewInterface { return new NewB(); } } /********************** CONVERTER DISCOVERER **********************/ interface ConverterDiscovererInterface { public function discoverConverterFor(OldInterface $old): ?ConverterInterface; } class ConverterDiscoverer implements ConverterDiscovererInterface { /** * @param ConverterInterface[] $converters */ public function __construct(private array $converters) {} public function discoverConverterFor(OldInterface $old): ?ConverterInterface { foreach ($this->converters as $converter) { if ($converter->supports($old)) { return $converter; } } return null; } } /********************** MASS CONVERTER **********************/ class MassConverter { public function __construct(private ConverterDiscovererInterface $converterDiscoverer) {} /** * @param OldInterface[] $oldObjects * @return NewInterface[] */ public function massConvert(array $oldObjects): array { $newObjects = []; foreach ($oldObjects as $oldObject) { $converter = $this->converterDiscoverer->discoverConverterFor($oldObject); if ($converter !== null) { $newObjects[] = $converter->convert($oldObject); } } return $newObjects; } } /********************** SAMPLE **********************/ $converterDiscoverer = new ConverterDiscoverer([new AConverter(), new BConverter()]); $massConverter = new MassConverter($converterDiscoverer); var_dump($massConverter->massConvert([new OldA(), new OldB()]));