Mapper.php
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Mapper.php
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	<?php declare(strict_types=1);
	/*
	* This file is part of sebastian/code-unit.
	*
	* (c) Sebastian Bergmann <sebastian@phpunit.de>
	*
	* For the full copyright and license information, please view the LICENSE
	* file that was distributed with this source code.
	*/
	namespace SebastianBergmann\CodeUnit;

	use function array_keys;
	use function array_merge;
	use function array_unique;
	use function array_values;
	use function class_exists;
	use function explode;
	use function function_exists;
	use function interface_exists;
	use function ksort;
	use function method_exists;
	use function sort;
	use function sprintf;
	use function str_replace;
	use function strpos;
	use function trait_exists;
	use ReflectionClass;
	use ReflectionFunction;
	use ReflectionMethod;

	final class Mapper
	{
	/**
	* @psalm-return array<string,list<int>>
	*/
	public function codeUnitsToSourceLines(CodeUnitCollection $codeUnits): array
	{
	$result = [];

	foreach ($codeUnits as $codeUnit) {
	$sourceFileName = $codeUnit->sourceFileName();

	if (!isset($result[$sourceFileName])) {
	$result[$sourceFileName] = [];
	}

	$result[$sourceFileName] = array_merge($result[$sourceFileName], $codeUnit->sourceLines());
	}

	foreach (array_keys($result) as $sourceFileName) {
	$result[$sourceFileName] = array_values(array_unique($result[$sourceFileName]));

	sort($result[$sourceFileName]);
	}

	ksort($result);

	return $result;
	}

	/**
	* @throws InvalidCodeUnitException
	* @throws ReflectionException
	*/
	public function stringToCodeUnits(string $unit): CodeUnitCollection
	{
	if (strpos($unit, '::') !== false) {
	[$firstPart, $secondPart] = explode('::', $unit);

	if (empty($firstPart) && $this->isUserDefinedFunction($secondPart)) {
	return CodeUnitCollection::fromList(CodeUnit::forFunction($secondPart));
	}

	if ($this->isUserDefinedClass($firstPart)) {
	if ($secondPart === '<public>') {
	return $this->publicMethodsOfClass($firstPart);
	}

	if ($secondPart === '<!public>') {
	return $this->protectedAndPrivateMethodsOfClass($firstPart);
	}

	if ($secondPart === '<protected>') {
	return $this->protectedMethodsOfClass($firstPart);
	}

	if ($secondPart === '<!protected>') {
	return $this->publicAndPrivateMethodsOfClass($firstPart);
	}

	if ($secondPart === '<private>') {
	return $this->privateMethodsOfClass($firstPart);
	}

	if ($secondPart === '<!private>') {
	return $this->publicAndProtectedMethodsOfClass($firstPart);
	}

	if ($this->isUserDefinedMethod($firstPart, $secondPart)) {
	return CodeUnitCollection::fromList(CodeUnit::forClassMethod($firstPart, $secondPart));
	}
	}

	if ($this->isUserDefinedInterface($firstPart)) {
	return CodeUnitCollection::fromList(CodeUnit::forInterfaceMethod($firstPart, $secondPart));
	}

	if ($this->isUserDefinedTrait($firstPart)) {
	return CodeUnitCollection::fromList(CodeUnit::forTraitMethod($firstPart, $secondPart));
	}
	} else {
	if ($this->isUserDefinedClass($unit)) {
	$units = [CodeUnit::forClass($unit)];

	foreach ($this->reflectorForClass($unit)->getTraits() as $trait) {
	if (!$trait->isUserDefined()) {
	// @codeCoverageIgnoreStart
	continue;
	// @codeCoverageIgnoreEnd
	}

	$units[] = CodeUnit::forTrait($trait->getName());
	}

	return CodeUnitCollection::fromArray($units);
	}

	if ($this->isUserDefinedInterface($unit)) {
	return CodeUnitCollection::fromList(CodeUnit::forInterface($unit));
	}

	if ($this->isUserDefinedTrait($unit)) {
	return CodeUnitCollection::fromList(CodeUnit::forTrait($unit));
	}

	if ($this->isUserDefinedFunction($unit)) {
	return CodeUnitCollection::fromList(CodeUnit::forFunction($unit));
	}

	$unit = str_replace('<extended>', '', $unit);

	if ($this->isUserDefinedClass($unit)) {
	return $this->classAndParentClassesAndTraits($unit);
	}
	}

	throw new InvalidCodeUnitException(
	sprintf(
	'"%s" is not a valid code unit',
	$unit
	)
	);
	}

	/**
	* @psalm-param class-string $className
	*
	* @throws ReflectionException
	*/
	private function publicMethodsOfClass(string $className): CodeUnitCollection
	{
	return $this->methodsOfClass($className, ReflectionMethod::IS_PUBLIC);
	}

	/**
	* @psalm-param class-string $className
	*
	* @throws ReflectionException
	*/
	private function publicAndProtectedMethodsOfClass(string $className): CodeUnitCollection
	{
	return $this->methodsOfClass($className, ReflectionMethod::IS_PUBLIC \| ReflectionMethod::IS_PROTECTED);
	}

	/**
	* @psalm-param class-string $className
	*
	* @throws ReflectionException
	*/
	private function publicAndPrivateMethodsOfClass(string $className): CodeUnitCollection
	{
	return $this->methodsOfClass($className, ReflectionMethod::IS_PUBLIC \| ReflectionMethod::IS_PRIVATE);
	}

	/**
	* @psalm-param class-string $className
	*
	* @throws ReflectionException
	*/
	private function protectedMethodsOfClass(string $className): CodeUnitCollection
	{
	return $this->methodsOfClass($className, ReflectionMethod::IS_PROTECTED);
	}

	/**
	* @psalm-param class-string $className
	*
	* @throws ReflectionException
	*/
	private function protectedAndPrivateMethodsOfClass(string $className): CodeUnitCollection
	{
	return $this->methodsOfClass($className, ReflectionMethod::IS_PROTECTED \| ReflectionMethod::IS_PRIVATE);
	}

	/**
	* @psalm-param class-string $className
	*
	* @throws ReflectionException
	*/
	private function privateMethodsOfClass(string $className): CodeUnitCollection
	{
	return $this->methodsOfClass($className, ReflectionMethod::IS_PRIVATE);
	}

	/**
	* @psalm-param class-string $className
	*
	* @throws ReflectionException
	*/
	private function methodsOfClass(string $className, int $filter): CodeUnitCollection
	{
	$units = [];

	foreach ($this->reflectorForClass($className)->getMethods($filter) as $method) {
	if (!$method->isUserDefined()) {
	continue;
	}

	$units[] = CodeUnit::forClassMethod($className, $method->getName());
	}

	return CodeUnitCollection::fromArray($units);
	}

	/**
	* @psalm-param class-string $className
	*
	* @throws ReflectionException
	*/
	private function classAndParentClassesAndTraits(string $className): CodeUnitCollection
	{
	$units = [CodeUnit::forClass($className)];

	$reflector = $this->reflectorForClass($className);

	foreach ($this->reflectorForClass($className)->getTraits() as $trait) {
	if (!$trait->isUserDefined()) {
	// @codeCoverageIgnoreStart
	continue;
	// @codeCoverageIgnoreEnd
	}

	$units[] = CodeUnit::forTrait($trait->getName());
	}

	while ($reflector = $reflector->getParentClass()) {
	if (!$reflector->isUserDefined()) {
	break;
	}

	$units[] = CodeUnit::forClass($reflector->getName());

	foreach ($reflector->getTraits() as $trait) {
	if (!$trait->isUserDefined()) {
	// @codeCoverageIgnoreStart
	continue;
	// @codeCoverageIgnoreEnd
	}

	$units[] = CodeUnit::forTrait($trait->getName());
	}
	}

	return CodeUnitCollection::fromArray($units);
	}

	/**
	* @psalm-param class-string $className
	*
	* @throws ReflectionException
	*/
	private function reflectorForClass(string $className): ReflectionClass
	{
	try {
	return new ReflectionClass($className);
	// @codeCoverageIgnoreStart
	} catch (\ReflectionException $e) {
	throw new ReflectionException(
	$e->getMessage(),
	(int) $e->getCode(),
	$e
	);
	}
	// @codeCoverageIgnoreEnd
	}

	/**
	* @throws ReflectionException
	*/
	private function isUserDefinedFunction(string $functionName): bool
	{
	if (!function_exists($functionName)) {
	return false;
	}

	try {
	return (new ReflectionFunction($functionName))->isUserDefined();
	// @codeCoverageIgnoreStart
	} catch (\ReflectionException $e) {
	throw new ReflectionException(
	$e->getMessage(),
	(int) $e->getCode(),
	$e
	);
	}
	// @codeCoverageIgnoreEnd
	}

	/**
	* @throws ReflectionException
	*/
	private function isUserDefinedClass(string $className): bool
	{
	if (!class_exists($className)) {
	return false;
	}

	try {
	return (new ReflectionClass($className))->isUserDefined();
	// @codeCoverageIgnoreStart
	} catch (\ReflectionException $e) {
	throw new ReflectionException(
	$e->getMessage(),
	(int) $e->getCode(),
	$e
	);
	}
	// @codeCoverageIgnoreEnd
	}

	/**
	* @throws ReflectionException
	*/
	private function isUserDefinedInterface(string $interfaceName): bool
	{
	if (!interface_exists($interfaceName)) {
	return false;
	}

	try {
	return (new ReflectionClass($interfaceName))->isUserDefined();
	// @codeCoverageIgnoreStart
	} catch (\ReflectionException $e) {
	throw new ReflectionException(
	$e->getMessage(),
	(int) $e->getCode(),
	$e
	);
	}
	// @codeCoverageIgnoreEnd
	}

	/**
	* @throws ReflectionException
	*/
	private function isUserDefinedTrait(string $traitName): bool
	{
	if (!trait_exists($traitName)) {
	return false;
	}

	try {
	return (new ReflectionClass($traitName))->isUserDefined();
	// @codeCoverageIgnoreStart
	} catch (\ReflectionException $e) {
	throw new ReflectionException(
	$e->getMessage(),
	(int) $e->getCode(),
	$e
	);
	}
	// @codeCoverageIgnoreEnd
	}

	/**
	* @throws ReflectionException
	*/
	private function isUserDefinedMethod(string $className, string $methodName): bool
	{
	if (!class_exists($className)) {
	// @codeCoverageIgnoreStart
	return false;
	// @codeCoverageIgnoreEnd
	}

	if (!method_exists($className, $methodName)) {
	// @codeCoverageIgnoreStart
	return false;
	// @codeCoverageIgnoreEnd
	}

	try {
	return (new ReflectionMethod($className, $methodName))->isUserDefined();
	// @codeCoverageIgnoreStart
	} catch (\ReflectionException $e) {
	throw new ReflectionException(
	$e->getMessage(),
	(int) $e->getCode(),
	$e
	);
	}
	// @codeCoverageIgnoreEnd
	}
	}

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