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<?php declare(strict_types=1); |
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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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namespace Daikon\Entity; |
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use Assert\Assert; |
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use Daikon\ValueObject\ValueObjectMap; |
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final class EntityDiff |
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{ |
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public function __invoke(EntityInterface $left, EntityInterface $right): ValueObjectMap |
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{ |
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Assert::that($right)->isInstanceOf( |
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get_class($left), |
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'Comparing entities of different types is not supported.' |
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); |
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return new ValueObjectMap(array_reduce( |
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$left->getAttributeMap()->keys(), |
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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 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 $right |
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): array { |
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$left_val = $left->get($attribute, null); |
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$right_val = $right->get($attribute, null); |
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if (is_null($left_val)) { |
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if (!is_null($right_val)) { |
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$diff[$attribute] = $left->get($attribute); |
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} |
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} else { |
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if (is_null($right_val) || !$left_val->equals($right_val)) { |
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$diff[$attribute] = $left->get($attribute); |
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} |
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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
