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<?php |
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declare(strict_types=1); |
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namespace Remorhaz\JSON\Data\Comparator; |
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use Collator; |
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use Iterator; |
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use Remorhaz\JSON\Data\Value\ArrayValueInterface; |
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use Remorhaz\JSON\Data\Value\ObjectValueInterface; |
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use Remorhaz\JSON\Data\Value\ScalarValueInterface; |
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use Remorhaz\JSON\Data\Value\ValueInterface; |
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use function is_string; |
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final class EqualValueComparator implements ComparatorInterface |
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{ |
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private $collator; |
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public function __construct(Collator $collator) |
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{ |
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$this->collator = $collator; |
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} |
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public function compare(ValueInterface $leftValue, ValueInterface $rightValue): bool |
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{ |
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if ($leftValue instanceof ScalarValueInterface && $rightValue instanceof ScalarValueInterface) { |
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return $this->isScalarEqual($leftValue, $rightValue); |
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} |
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if ($leftValue instanceof ArrayValueInterface && $rightValue instanceof ArrayValueInterface) { |
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return $this->isArrayEqual($leftValue, $rightValue); |
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} |
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if ($leftValue instanceof ObjectValueInterface && $rightValue instanceof ObjectValueInterface) { |
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return $this->isObjectEqual($leftValue, $rightValue); |
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} |
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return false; |
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} |
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private function isScalarEqual(ScalarValueInterface $leftValue, ScalarValueInterface $rightValue): bool |
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{ |
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$leftData = $leftValue->getData(); |
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$rightData = $rightValue->getData(); |
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if (is_string($leftData) && is_string($rightData)) { |
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return 0 === $this->collator->compare($leftData, $rightData); |
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} |
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return $leftData === $rightData; |
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} |
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private function isArrayEqual(ArrayValueInterface $leftValue, ArrayValueInterface $rightValue): bool |
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{ |
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$leftValueIterator = $leftValue->createChildIterator(); |
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$rightValueIterator = $rightValue->createChildIterator(); |
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while ($leftValueIterator->valid()) { |
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if (!$rightValueIterator->valid()) { |
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return false; |
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} |
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if (!$this->compare($leftValueIterator->current(), $rightValueIterator->current())) { |
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return false; |
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} |
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$leftValueIterator->next(); |
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$rightValueIterator->next(); |
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} |
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return !$rightValueIterator->valid(); |
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} |
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private function isObjectEqual(ObjectValueInterface $leftValue, ObjectValueInterface $rightValue): bool |
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{ |
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$leftProperties = $this->getPropertiesWithoutDuplicates($leftValue->createChildIterator()); |
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if (!isset($leftProperties)) { |
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return false; |
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} |
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$rightProperties = $this->getPropertiesWithoutDuplicates($rightValue->createChildIterator()); |
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if (!isset($rightProperties)) { |
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return false; |
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} |
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foreach ($rightProperties as $property => $rightValue) { |
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if (!isset($leftProperties[$property])) { |
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return false; |
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} |
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if (!$this->compare($leftProperties[$property], $rightValue)) { |
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return false; |
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} |
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unset($leftProperties[$property]); |
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} |
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return empty($leftProperties); |
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} |
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private function getPropertiesWithoutDuplicates(Iterator $valueIterator): ?array |
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{ |
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$valuesByProperty = []; |
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while ($valueIterator->valid()) { |
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$property = $valueIterator->key(); |
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if (isset($valuesByProperty[$property])) { |
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return null; |
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} |
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$valuesByProperty[$property] = $valueIterator->current(); |
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$valueIterator->next(); |
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} |
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return $valuesByProperty; |
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} |
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} |
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remorhaz /
php-json-data
