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<?php |
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/** |
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* This file is part of the daikon-cqrs/entity project. |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace Daikon\Entity\Entity; |
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use Daikon\Entity\Assert\Assertion; |
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final class EntityDiff |
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{ |
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public function __invoke(EntityInterface $left, EntityInterface $right): ValueObjectMap |
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{ |
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$this->assertComparibility($left, $right); |
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return ValueObjectMap::forEntity($left, array_reduce( |
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$this->listAtrributeNames($left), |
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function (array $diff, string $attribute) use ($left, $right): array { |
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if ($this->bothEntitesHaveValueSet($attribute, $left, $right)) { |
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$diff = $this->addValueIfDifferent($diff, $attribute, $left, $right); |
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} elseif ($left->has($attribute)) { |
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$diff[$attribute] = $left->get($attribute); |
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} |
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return $diff; |
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}, |
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[] |
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)); |
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} |
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private function assertComparibility(EntityInterface $left, EntityInterface $right) |
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{ |
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Assertion::isInstanceOf( |
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$right, |
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get_class($left), |
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'Comparing entities of different types is not supported.' |
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); |
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} |
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private function listAtrributeNames(EntityInterface $entity): array |
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{ |
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return array_keys($entity->getAttributeMap()->toArray()); |
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} |
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private function bothEntitesHaveValueSet(string $attribute, EntityInterface $left, EntityInterface $right): bool |
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{ |
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return $left->has($attribute) && $right->has($attribute); |
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} |
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private function addValueIfDifferent( |
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array $diff, |
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string $attribute, |
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EntityInterface $left, |
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EntityInterface $right |
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): array { |
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if (!$left->get($attribute)->equals($right->get($attribute))) { |
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$diff[$attribute] = $left->get($attribute); |
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} |
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return $diff; |
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} |
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} |
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daikon-cqrs /
entity
