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<?php |
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namespace Smart\EtlBundle\Generator; |
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use Doctrine\ORM\EntityManagerInterface; |
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use Symfony\Component\PropertyAccess\PropertyAccess; |
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use Symfony\Component\PropertyAccess\PropertyAccessor; |
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/** |
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* @author Louis Fortunier <[email protected]> |
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* |
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* The EntityDiffGenerator class is responsible for comparing entities and |
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* generating a diff preview with the changes needed to migrate from one data to the other. |
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*/ |
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class EntityDiffGenerator |
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{ |
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/** @var EntityManagerInterface */ |
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protected $entityManager; |
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/** @var PropertyAccessor */ |
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protected $accessor; |
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public function __construct(EntityManagerInterface $entityManager) |
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{ |
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$this->entityManager = $entityManager; |
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$this->accessor = PropertyAccess::createPropertyAccessor(); |
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} |
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public function generateDiffs(string $entityClass, array $entities, array $properties, string $identifier = null): array |
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{ |
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$toReturn = []; |
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if ($entities === []) { |
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return $toReturn; |
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} |
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$identifier = $identifier != null ? $identifier : $properties[0]; |
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$identifiers = array_map(function ($entity) use ($identifier) { |
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return $this->accessor->getValue($entity, $identifier); |
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}, $entities); |
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$entitiesFromDb = $this->entityManager->getRepository($entityClass) |
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->createQueryBuilder('o', "o.$identifier") |
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->where("o.$identifier IN (:identifiers)") |
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->setParameter('identifiers', $identifiers) |
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->getQuery() |
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->getResult(); |
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foreach ($entities as $key => $entity) { |
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$entityFromDb = null; |
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if (isset($entitiesFromDb[$this->accessor->getValue($entity, $identifier)])) { |
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$entityFromDb = $entitiesFromDb[$this->accessor->getValue($entity, $identifier)]; |
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} |
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$toReturn[$key] = $this->generateDiff($entity, $entityFromDb, $properties); |
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} |
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return $toReturn; |
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} |
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/** |
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* @param mixed $entity |
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*/ |
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public function generateDiff($entity, $entityFromDb, array $properties): array |
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{ |
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$isNew = ($entityFromDb === null); |
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$toReturn['diff_type'] = 'new'; |
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$hasDataChange = false; |
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foreach ($properties as $property) { |
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$value = $this->accessor->getValue($entity, $property); |
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$toReturn['diff'][$property] = $value; |
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if (!$isNew) { |
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$toReturn['diff_type'] = 'change'; |
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$originValue = $this->accessor->getValue($entityFromDb, $property); |
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$hasChange = ($originValue != $value); |
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$toReturn['diff'][$property] = [ |
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'value' => $value, |
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'origin_value' => $originValue, |
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'has_change' => $hasChange, |
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]; |
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if ($hasChange) { |
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$hasDataChange = true; |
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} |
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} |
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} |
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if (!$isNew && !$hasDataChange) { |
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$toReturn['diff_type'] = 'unchanged'; |
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} |
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return $toReturn; |
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} |
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} |
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smartbooster /
etl-bundle
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