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<?php namespace DeepCopy; use ArrayObject; use DateInterval; use DatePeriod; use DateTimeInterface; use DateTimeZone; use DeepCopy\Exception\CloneException; use DeepCopy\Filter\ChainableFilter; use DeepCopy\Filter\Filter; use DeepCopy\Matcher\Matcher; use DeepCopy\Reflection\ReflectionHelper; use DeepCopy\TypeFilter\Date\DateIntervalFilter; use DeepCopy\TypeFilter\Date\DatePeriodFilter; use DeepCopy\TypeFilter\Spl\ArrayObjectFilter; use DeepCopy\TypeFilter\Spl\SplDoublyLinkedListFilter; use DeepCopy\TypeFilter\TypeFilter; use DeepCopy\TypeMatcher\TypeMatcher; use ReflectionObject; use ReflectionProperty; use SplDoublyLinkedList; /** * @final / class DeepCopy { /* * @var object[] List of objects copied. / private $hashMap = []; /* * Filters to apply. * * @var array Array of ['filter' => Filter, 'matcher' => Matcher] pairs. / private $filters = []; /* * Type Filters to apply. * * @var array Array of ['filter' => Filter, 'matcher' => Matcher] pairs. / private $typeFilters = []; /* * @var bool / private $skipUncloneable = false; /* * @var bool / private $useCloneMethod; /* * @param bool $useCloneMethod If set to true, when an object implements the __clone() function, it will be used * instead of the regular deep cloning. / public function __construct($useCloneMethod = false) { $this->useCloneMethod = $useCloneMethod; $this->addTypeFilter(new ArrayObjectFilter($this), new TypeMatcher(ArrayObject::class)); $this->addTypeFilter(new DateIntervalFilter(), new TypeMatcher(DateInterval::class)); $this->addTypeFilter(new DatePeriodFilter(), new TypeMatcher(DatePeriod::class)); $this->addTypeFilter(new SplDoublyLinkedListFilter($this), new TypeMatcher(SplDoublyLinkedList::class)); } /* * If enabled, will not throw an exception when coming across an uncloneable property. * * @param $skipUncloneable * * @return $this / public function skipUncloneable($skipUncloneable = true) { $this->skipUncloneable = $skipUncloneable; return $this; } /* * Deep copies the given object. * * @template TObject * * @param TObject $object * * @return TObject / public function copy($object) { $this->hashMap = []; return $this->recursiveCopy($object); } public function addFilter(Filter $filter, Matcher $matcher) { $this->filters[] = [ 'matcher' => $matcher, 'filter' => $filter, ]; } public function prependFilter(Filter $filter, Matcher $matcher) { array_unshift($this->filters, [ 'matcher' => $matcher, 'filter' => $filter, ]); } public function addTypeFilter(TypeFilter $filter, TypeMatcher $matcher) { $this->typeFilters[] = [ 'matcher' => $matcher, 'filter' => $filter, ]; } public function prependTypeFilter(TypeFilter $filter, TypeMatcher $matcher) { array_unshift($this->typeFilters, [ 'matcher' => $matcher, 'filter' => $filter, ]); } private function recursiveCopy($var) { // Matches Type Filter if ($filter = $this->getFirstMatchedTypeFilter($this->typeFilters, $var)) { return $filter->apply($var); } // Resource if (is_resource($var)) { return $var; } // Array if (is_array($var)) { return $this->copyArray($var); } // Scalar if (! is_object($var)) { return $var; } // Enum if (PHP_VERSION_ID >= 80100 && enum_exists(get_class($var))) { return $var; } // Object return $this->copyObject($var); } /* * Copy an array * @param array $array * @return array / private function copyArray(array $array) { foreach ($array as $key => $value) { $array[$key] = $this->recursiveCopy($value); } return $array; } /* * Copies an object. * * @param object $object * * @throws CloneException * * @return object / private function copyObject($object) { $objectHash = spl_object_hash($object); if (isset($this->hashMap[$objectHash])) { return $this->hashMap[$objectHash]; } $reflectedObject = new ReflectionObject($object); $isCloneable = $reflectedObject->isCloneable(); if (false === $isCloneable) { if ($this->skipUncloneable) { $this->hashMap[$objectHash] = $object; return $object; } throw new CloneException( sprintf( 'The class "%s" is not cloneable.', $reflectedObject->getName() ) ); } $newObject = clone $object; $this->hashMap[$objectHash] = $newObject; if ($this->useCloneMethod && $reflectedObject->hasMethod('__clone')) { return $newObject; } if ($newObject instanceof DateTimeInterface \|\| $newObject instanceof DateTimeZone) { return $newObject; } foreach (ReflectionHelper::getProperties($reflectedObject) as $property) { $this->copyObjectProperty($newObject, $property); } return $newObject; } private function copyObjectProperty($object, ReflectionProperty $property) { // Ignore static properties if ($property->isStatic()) { return; } // Ignore readonly properties if (method_exists($property, 'isReadOnly') && $property->isReadOnly()) { return; } // Apply the filters foreach ($this->filters as $item) { /* @var Matcher $matcher / $matcher = $item['matcher']; /* @var Filter $filter / $filter = $item['filter']; if ($matcher->matches($object, $property->getName())) { $filter->apply( $object, $property->getName(), function ($object) { return $this->recursiveCopy($object); } ); if ($filter instanceof ChainableFilter) { continue; } // If a filter matches, we stop processing this property return; } } if (PHP_VERSION_ID < 80100) { $property->setAccessible(true); } // Ignore uninitialized properties (for PHP >7.4) if (method_exists($property, 'isInitialized') && !$property->isInitialized($object)) { return; } $propertyValue = $property->getValue($object); // Copy the property $property->setValue($object, $this->recursiveCopy($propertyValue)); } /* * Returns first filter that matches variable, `null` if no such filter found. * * @param array $filterRecords Associative array with 2 members: 'filter' with value of type {@see TypeFilter} and * 'matcher' with value of type {@see TypeMatcher} * @param mixed $var * * @return TypeFilter\|null / private function getFirstMatchedTypeFilter(array $filterRecords, $var) { $matched = $this->first( $filterRecords, function (array $record) use ($var) { / @var TypeMatcher $matcher / $matcher = $record['matcher']; return $matcher->matches($var); } ); return isset($matched) ? $matched['filter'] : null; } /* * Returns first element that matches predicate, `null` if no such element found. * * @param array $elements Array of ['filter' => Filter, 'matcher' => Matcher] pairs. * @param callable $predicate Predicate arguments are: element. * * @return array\|null Associative array with 2 members: 'filter' with value of type {@see TypeFilter} and 'matcher' * with value of type {@see TypeMatcher} or `null`. */ private function first(array $elements, callable $predicate) { foreach ($elements as $element) { if (call_user_func($predicate, $element)) { return $element; } } return null; } }

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