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<?php declare(strict_types=1); namespace NunoMaduro\Larastan\Support; use Illuminate\Database\Eloquent\Collection as EloquentCollection; use Illuminate\Support\Collection; use Illuminate\Support\Enumerable; use Iterator; use IteratorAggregate; use PHPStan\Reflection\ClassReflection; use PHPStan\Reflection\MissingMethodFromReflectionException; use PHPStan\Reflection\ParametersAcceptorSelector; use PHPStan\Reflection\ReflectionProvider; use PHPStan\ShouldNotHappenException; use PHPStan\Type\BenevolentUnionType; use PHPStan\Type\Generic\GenericObjectType; use PHPStan\Type\IntegerType; use PHPStan\Type\MixedType; use PHPStan\Type\ObjectType; use PHPStan\Type\StringType; use PHPStan\Type\Type; use PHPStan\Type\VerbosityLevel; use Traversable; final class CollectionHelper { public function __construct(private ReflectionProvider $reflectionProvider) { } public function determineGenericCollectionTypeFromType(Type $type): ?GenericObjectType { $classReflections = $type->getObjectClassReflections(); if (count($classReflections) > 0) { if ((new ObjectType(Enumerable::class))->isSuperTypeOf($type)->yes()) { return $this->getTypeFromEloquentCollection($classReflections[0]); } if ( (new ObjectType(Traversable::class))->isSuperTypeOf($type)->yes() \|\| (new ObjectType(IteratorAggregate::class))->isSuperTypeOf($type)->yes() \|\| (new ObjectType(Iterator::class))->isSuperTypeOf($type)->yes() ) { return $this->getTypeFromIterator($classReflections[0]); } } if (! $type->isArray()->yes()) { return new GenericObjectType(Collection::class, [$type->toArray()->getIterableKeyType(), $type->toArray()->getIterableValueType()]); } if ($type->isIterableAtLeastOnce()->no()) { return new GenericObjectType(Collection::class, [new BenevolentUnionType([new IntegerType(), new StringType()]), new MixedType()]); } return null; } public function determineCollectionClassName(string $modelClassName): string { try { $newCollectionMethod = $this->reflectionProvider->getClass($modelClassName)->getNativeMethod('newCollection'); $returnType = ParametersAcceptorSelector::selectSingle($newCollectionMethod->getVariants())->getReturnType(); $classNames = $returnType->getObjectClassNames(); if (count($classNames) === 1) { return $classNames[0]; } return $returnType->describe(VerbosityLevel::value()); } catch (MissingMethodFromReflectionException\|ShouldNotHappenException) { return EloquentCollection::class; } } public function determineCollectionClass(string $modelClassName): Type { $collectionClassName = $this->determineCollectionClassName($modelClassName); $collectionReflection = $this->reflectionProvider->getClass($collectionClassName); if ($collectionReflection->isGeneric()) { $typeMap = $collectionReflection->getActiveTemplateTypeMap(); // Specifies key and value if ($typeMap->count() === 2) { return new GenericObjectType($collectionClassName, [new IntegerType(), new ObjectType($modelClassName)]); } // Specifies only value if (($typeMap->count() === 1) && $typeMap->hasType('TModel')) { return new GenericObjectType($collectionClassName, [new ObjectType($modelClassName)]); } } // Not generic. So return the type as is return new ObjectType($collectionClassName); } private function getTypeFromEloquentCollection(ClassReflection $classReflection): ?GenericObjectType { $keyType = new BenevolentUnionType([new IntegerType(), new StringType()]); $innerValueType = $classReflection->getActiveTemplateTypeMap()->getType('TModel'); if ($classReflection->getName() === EloquentCollection::class \|\| $classReflection->isSubclassOf(EloquentCollection::class)) { $keyType = new IntegerType(); } if ($innerValueType !== null) { return new GenericObjectType(Collection::class, [$keyType, $innerValueType]); } return null; } private function getTypeFromIterator(ClassReflection $classReflection): GenericObjectType { $keyType = new BenevolentUnionType([new IntegerType(), new StringType()]); $templateTypes = array_values($classReflection->getActiveTemplateTypeMap()->getTypes()); if (count($templateTypes) === 1) { return new GenericObjectType(Collection::class, [$keyType, $templateTypes[0]]); } return new GenericObjectType(Collection::class, $templateTypes); } }

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