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ParameterTypeHintSniff.php
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ParameterTypeHintSniff.php
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<?php declare(strict_types = 1);
namespace SlevomatCodingStandard\Sniffs\TypeHints;
use PHP_CodeSniffer\Files\File;
use PHP_CodeSniffer\Sniffs\Sniff;
use PHPStan\PhpDocParser\Ast\Type\ArrayShapeNode;
use PHPStan\PhpDocParser\Ast\Type\ArrayTypeNode;
use PHPStan\PhpDocParser\Ast\Type\CallableTypeNode;
use PHPStan\PhpDocParser\Ast\Type\ConstTypeNode;
use PHPStan\PhpDocParser\Ast\Type\GenericTypeNode;
use PHPStan\PhpDocParser\Ast\Type\IdentifierTypeNode;
use PHPStan\PhpDocParser\Ast\Type\IntersectionTypeNode;
use PHPStan\PhpDocParser\Ast\Type\NullableTypeNode;
use PHPStan\PhpDocParser\Ast\Type\ThisTypeNode;
use PHPStan\PhpDocParser\Ast\Type\UnionTypeNode;
use SlevomatCodingStandard\Helpers\Annotation\ParameterAnnotation;
use SlevomatCodingStandard\Helpers\Annotation\VariableAnnotation;
use SlevomatCodingStandard\Helpers\AnnotationHelper;
use SlevomatCodingStandard\Helpers\AnnotationTypeHelper;
use SlevomatCodingStandard\Helpers\DocCommentHelper;
use SlevomatCodingStandard\Helpers\FunctionHelper;
use SlevomatCodingStandard\Helpers\NamespaceHelper;
use SlevomatCodingStandard\Helpers\SniffSettingsHelper;
use SlevomatCodingStandard\Helpers\SuppressHelper;
use SlevomatCodingStandard\Helpers\TokenHelper;
use SlevomatCodingStandard\Helpers\TypeHint;
use SlevomatCodingStandard\Helpers\TypeHintHelper;
use function array_filter;
use function array_key_exists;
use function array_keys;
use function array_map;
use function array_merge;
use function array_unique;
use function array_values;
use function count;
use function implode;
use function in_array;
use function lcfirst;
use function sprintf;
use function strtolower;
use const T_BITWISE_AND;
use const T_DOC_COMMENT_CLOSE_TAG;
use const T_DOC_COMMENT_OPEN_TAG;
use const T_DOC_COMMENT_STAR;
use const T_ELLIPSIS;
use const T_FUNCTION;
use const T_VARIABLE;
class ParameterTypeHintSniff implements Sniff
{
public const CODE_MISSING_ANY_TYPE_HINT = 'MissingAnyTypeHint';
public const CODE_MISSING_NATIVE_TYPE_HINT = 'MissingNativeTypeHint';
public const CODE_MISSING_TRAVERSABLE_TYPE_HINT_SPECIFICATION = 'MissingTraversableTypeHintSpecification';
public const CODE_USELESS_ANNOTATION = 'UselessAnnotation';
public const CODE_USELESS_SUPPRESS = 'UselessSuppress';
private const NAME = 'SlevomatCodingStandard.TypeHints.ParameterTypeHint';
/** @var bool|null */
public $enableObjectTypeHint = null;
/** @var bool|null */
public $enableMixedTypeHint = null;
/** @var bool|null */
public $enableUnionTypeHint = null;
/** @var bool|null */
public $enableIntersectionTypeHint = null;
/** @var string[] */
public $traversableTypeHints = [];
/** @var array<int, string>|null */
private $normalizedTraversableTypeHints;
/**
* @return array<int, (int|string)>
*/
public function register(): array
{
return [
T_FUNCTION,
];
}
/**
* @phpcsSuppress SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingNativeTypeHint
* @param int $functionPointer
*/
public function process(File $phpcsFile, $functionPointer): void
{
$this->enableObjectTypeHint = SniffSettingsHelper::isEnabledByPhpVersion($this->enableObjectTypeHint, 70200);
$this->enableMixedTypeHint = SniffSettingsHelper::isEnabledByPhpVersion($this->enableMixedTypeHint, 80000);
$this->enableUnionTypeHint = SniffSettingsHelper::isEnabledByPhpVersion($this->enableUnionTypeHint, 80000);
$this->enableIntersectionTypeHint = SniffSettingsHelper::isEnabledByPhpVersion($this->enableIntersectionTypeHint, 80100);
if (SuppressHelper::isSniffSuppressed($phpcsFile, $functionPointer, self::NAME)) {
return;
}
if (DocCommentHelper::hasInheritdocAnnotation($phpcsFile, $functionPointer)) {
return;
}
$parametersTypeHints = FunctionHelper::getParametersTypeHints($phpcsFile, $functionPointer);
$parametersAnnotations = FunctionHelper::getValidParametersAnnotations($phpcsFile, $functionPointer);
$prefixedParametersAnnotations = FunctionHelper::getValidPrefixedParametersAnnotations($phpcsFile, $functionPointer);
$this->checkTypeHints($phpcsFile, $functionPointer, $parametersTypeHints, $parametersAnnotations, $prefixedParametersAnnotations);
$this->checkTraversableTypeHintSpecification(
$phpcsFile,
$functionPointer,
$parametersTypeHints,
$parametersAnnotations,
$prefixedParametersAnnotations
);
$this->checkUselessAnnotations($phpcsFile, $functionPointer, $parametersTypeHints, $parametersAnnotations);
}
/**
* @param (TypeHint|null)[] $parametersTypeHints
* @param array<string, ParameterAnnotation|VariableAnnotation> $parametersAnnotations
* @param array<string, ParameterAnnotation|VariableAnnotation> $prefixedParametersAnnotations
*/
private function checkTypeHints(
File $phpcsFile,
int $functionPointer,
array $parametersTypeHints,
array $parametersAnnotations,
array $prefixedParametersAnnotations
): void
{
$suppressNameAnyTypeHint = self::getSniffName(self::CODE_MISSING_ANY_TYPE_HINT);
$isSuppressedAnyTypeHint = SuppressHelper::isSniffSuppressed($phpcsFile, $functionPointer, $suppressNameAnyTypeHint);
$suppressNameNativeTypeHint = $this->getSniffName(self::CODE_MISSING_NATIVE_TYPE_HINT);
$isSuppressedNativeTypeHint = SuppressHelper::isSniffSuppressed($phpcsFile, $functionPointer, $suppressNameNativeTypeHint);
$suppressedErrors = 0;
$parametersWithoutTypeHint = array_keys(
array_filter($parametersTypeHints, static function (?TypeHint $parameterTypeHint = null): bool {
return $parameterTypeHint === null;
})
);
foreach ($parametersWithoutTypeHint as $parameterName) {
if (!array_key_exists($parameterName, $parametersAnnotations) || $parametersAnnotations[$parameterName]->getType() === null) {
if (array_key_exists($parameterName, $prefixedParametersAnnotations)) {
continue;
}
if ($isSuppressedAnyTypeHint) {
$suppressedErrors++;
continue;
}
$phpcsFile->addError(
sprintf(
'%s %s() does not have parameter type hint nor @param annotation for its parameter %s.',
FunctionHelper::getTypeLabel($phpcsFile, $functionPointer),
FunctionHelper::getFullyQualifiedName($phpcsFile, $functionPointer),
$parameterName
),
$functionPointer,
self::CODE_MISSING_ANY_TYPE_HINT
);
continue;
}
$parameterTypeNode = $parametersAnnotations[$parameterName]->getType();
if ($parameterTypeNode instanceof IdentifierTypeNode && strtolower($parameterTypeNode->name) === 'null') {
continue;
}
$originalParameterTypeNode = $parameterTypeNode;
if ($parameterTypeNode instanceof NullableTypeNode) {
$parameterTypeNode = $parameterTypeNode->type;
}
$canTryUnionTypeHint = $this->enableUnionTypeHint && $parameterTypeNode instanceof UnionTypeNode;
$typeHints = [];
$traversableTypeHints = [];
$nullableParameterTypeHint = false;
if (AnnotationTypeHelper::containsOneType($parameterTypeNode)) {
/** @var ArrayTypeNode|ArrayShapeNode|IdentifierTypeNode|ThisTypeNode|GenericTypeNode|CallableTypeNode|ConstTypeNode $parameterTypeNode */
$parameterTypeNode = $parameterTypeNode;
$typeHints[] = AnnotationTypeHelper::getTypeHintFromOneType($parameterTypeNode);
} elseif (
$parameterTypeNode instanceof UnionTypeNode
|| $parameterTypeNode instanceof IntersectionTypeNode
) {
$traversableTypeHints = [];
foreach ($parameterTypeNode->types as $typeNode) {
if (!AnnotationTypeHelper::containsOneType($typeNode)) {
continue 2;
}
/** @var ArrayTypeNode|ArrayShapeNode|IdentifierTypeNode|ThisTypeNode|GenericTypeNode|CallableTypeNode|ConstTypeNode $typeNode */
$typeNode = $typeNode;
$typeHint = AnnotationTypeHelper::getTypeHintFromOneType($typeNode, $canTryUnionTypeHint);
if (strtolower($typeHint) === 'null') {
$nullableParameterTypeHint = true;
continue;
}
$isTraversable = TypeHintHelper::isTraversableType(
TypeHintHelper::getFullyQualifiedTypeHint($phpcsFile, $functionPointer, $typeHint),
$this->getTraversableTypeHints()
);
if (
!$typeNode instanceof ArrayTypeNode
&& !$typeNode instanceof ArrayShapeNode
&& $isTraversable
) {
$traversableTypeHints[] = $typeHint;
}
$typeHints[] = $typeHint;
}
$traversableTypeHints = array_values(array_unique($traversableTypeHints));
if (count($traversableTypeHints) > 1 && !$canTryUnionTypeHint) {
continue;
}
}
$typeHints = array_values(array_unique($typeHints));
if (count($traversableTypeHints) > 0) {
/** @var UnionTypeNode|IntersectionTypeNode $parameterTypeNode */
$parameterTypeNode = $parameterTypeNode;
$itemsSpecificationTypeHint = AnnotationTypeHelper::getItemsSpecificationTypeFromType($parameterTypeNode);
if ($itemsSpecificationTypeHint !== null) {
$typeHints = AnnotationTypeHelper::getTraversableTypeHintsFromType(
$parameterTypeNode,
$phpcsFile,
$functionPointer,
$this->getTraversableTypeHints(),
$canTryUnionTypeHint
);
}
}
if (count($typeHints) === 0) {
continue;
}
$typeHintsWithConvertedUnion = [];
foreach ($typeHints as $typeHint) {
if ($this->enableUnionTypeHint && TypeHintHelper::isUnofficialUnionTypeHint($typeHint)) {
$canTryUnionTypeHint = true;
$typeHintsWithConvertedUnion = array_merge(
$typeHintsWithConvertedUnion,
TypeHintHelper::convertUnofficialUnionTypeHintToOfficialTypeHints($typeHint)
);
} else {
$typeHintsWithConvertedUnion[] = $typeHint;
}
}
$typeHintsWithConvertedUnion = array_unique($typeHintsWithConvertedUnion);
if (count($typeHintsWithConvertedUnion) > 1 && !$canTryUnionTypeHint && !$this->enableIntersectionTypeHint) {
continue;
}
foreach ($typeHintsWithConvertedUnion as $typeHintNo => $typeHint) {
if ($canTryUnionTypeHint && $typeHint === 'false') {
continue;
}
if (!TypeHintHelper::isValidTypeHint($typeHint, $this->enableObjectTypeHint, false, $this->enableMixedTypeHint)) {
continue 2;
}
if (TypeHintHelper::isTypeDefinedInAnnotation($phpcsFile, $functionPointer, $typeHint)) {
continue 2;
}
$typeHintsWithConvertedUnion[$typeHintNo] = TypeHintHelper::convertLongSimpleTypeHintToShort($typeHint);
}
if ($originalParameterTypeNode instanceof NullableTypeNode) {
$nullableParameterTypeHint = true;
}
if ($isSuppressedNativeTypeHint) {
$suppressedErrors++;
continue;
}
$fix = $phpcsFile->addFixableError(
sprintf(
'%s %s() does not have native type hint for its parameter %s but it should be possible to add it based on @param annotation "%s".',
FunctionHelper::getTypeLabel($phpcsFile, $functionPointer),
FunctionHelper::getFullyQualifiedName($phpcsFile, $functionPointer),
$parameterName,
AnnotationTypeHelper::export($parameterTypeNode)
),
$functionPointer,
self::CODE_MISSING_NATIVE_TYPE_HINT
);
if (!$fix) {
continue;
}
if (in_array('mixed', $typeHintsWithConvertedUnion, true)) {
$parameterTypeHint = 'mixed';
} elseif ($originalParameterTypeNode instanceof IntersectionTypeNode) {
$parameterTypeHint = implode('&', $typeHintsWithConvertedUnion);
} else {
$parameterTypeHint = implode('|', $typeHintsWithConvertedUnion);
if ($nullableParameterTypeHint) {
if (count($typeHintsWithConvertedUnion) > 1) {
$parameterTypeHint .= '|null';
} else {
$parameterTypeHint = '?' . $parameterTypeHint;
}
}
}
$tokens = $phpcsFile->getTokens();
/** @var int $parameterPointer */
$parameterPointer = TokenHelper::findNextContent(
$phpcsFile,
T_VARIABLE,
$parameterName,
$tokens[$functionPointer]['parenthesis_opener'],
$tokens[$functionPointer]['parenthesis_closer']
);
$beforeParameterPointer = $parameterPointer;
do {
$previousPointer = TokenHelper::findPreviousEffective(
$phpcsFile,
$beforeParameterPointer - 1,
$tokens[$functionPointer]['parenthesis_opener'] + 1
);
if (
$previousPointer === null
|| !in_array($tokens[$previousPointer]['code'], [T_BITWISE_AND, T_ELLIPSIS], true)
) {
break;
}
/** @var int $beforeParameterPointer */
$beforeParameterPointer = $previousPointer;
} while (true);
$phpcsFile->fixer->beginChangeset();
$phpcsFile->fixer->addContentBefore(
$beforeParameterPointer,
sprintf('%s ', $parameterTypeHint)
);
$phpcsFile->fixer->endChangeset();
}
if ($suppressedErrors > 0) {
return;
}
if ($isSuppressedAnyTypeHint) {
$this->reportUselessSuppress($phpcsFile, $functionPointer, $suppressNameAnyTypeHint);
}
if ($isSuppressedNativeTypeHint) {
$this->reportUselessSuppress($phpcsFile, $functionPointer, $suppressNameNativeTypeHint);
}
}
/**
* @param (TypeHint|null)[] $parametersTypeHints
* @param array<string, ParameterAnnotation|VariableAnnotation> $parametersAnnotations
* @param array<string, ParameterAnnotation|VariableAnnotation> $prefixedParametersAnnotations
*/
private function checkTraversableTypeHintSpecification(
File $phpcsFile,
int $functionPointer,
array $parametersTypeHints,
array $parametersAnnotations,
array $prefixedParametersAnnotations
): void
{
$suppressName = self::getSniffName(self::CODE_MISSING_TRAVERSABLE_TYPE_HINT_SPECIFICATION);
$isSniffSuppressed = SuppressHelper::isSniffSuppressed($phpcsFile, $functionPointer, $suppressName);
$suppressUseless = true;
foreach ($parametersTypeHints as $parameterName => $parameterTypeHint) {
if (array_key_exists($parameterName, $prefixedParametersAnnotations)) {
continue;
}
$hasTraversableTypeHint = false;
if (
$parameterTypeHint !== null
&& TypeHintHelper::isTraversableType(
TypeHintHelper::getFullyQualifiedTypeHint($phpcsFile, $functionPointer, $parameterTypeHint->getTypeHint()),
$this->getTraversableTypeHints()
)
) {
$hasTraversableTypeHint = true;
} elseif (
array_key_exists($parameterName, $parametersAnnotations)
&& $parametersAnnotations[$parameterName]->getType() !== null
&& AnnotationTypeHelper::containsTraversableType(
$parametersAnnotations[$parameterName]->getType(),
$phpcsFile,
$functionPointer,
$this->getTraversableTypeHints()
)
) {
$hasTraversableTypeHint = true;
}
if ($hasTraversableTypeHint && !array_key_exists($parameterName, $parametersAnnotations)) {
$suppressUseless = false;
if (!$isSniffSuppressed) {
$phpcsFile->addError(
sprintf(
'%s %s() does not have @param annotation for its traversable parameter %s.',
FunctionHelper::getTypeLabel($phpcsFile, $functionPointer),
FunctionHelper::getFullyQualifiedName($phpcsFile, $functionPointer),
$parameterName
),
$functionPointer,
self::CODE_MISSING_TRAVERSABLE_TYPE_HINT_SPECIFICATION
);
}
continue;
}
if (!array_key_exists($parameterName, $parametersAnnotations)) {
continue;
}
$parameterTypeNode = $parametersAnnotations[$parameterName]->getType();
if ($parameterTypeNode === null) {
continue;
}
if (
(
!$hasTraversableTypeHint
&& !AnnotationTypeHelper::containsTraversableType(
$parameterTypeNode,
$phpcsFile,
$functionPointer,
$this->getTraversableTypeHints()
)
)
|| AnnotationTypeHelper::containsItemsSpecificationForTraversable(
$parameterTypeNode,
$phpcsFile,
$functionPointer,
$this->getTraversableTypeHints()
)
) {
continue;
}
$suppressUseless = false;
if ($isSniffSuppressed) {
continue;
}
$phpcsFile->addError(
sprintf(
'@param annotation of %s %s() does not specify type hint for items of its traversable parameter %s.',
lcfirst(FunctionHelper::getTypeLabel($phpcsFile, $functionPointer)),
FunctionHelper::getFullyQualifiedName($phpcsFile, $functionPointer),
$parameterName
),
$parametersAnnotations[$parameterName]->getStartPointer(),
self::CODE_MISSING_TRAVERSABLE_TYPE_HINT_SPECIFICATION
);
}
if ($isSniffSuppressed && $suppressUseless) {
$this->reportUselessSuppress($phpcsFile, $functionPointer, $suppressName);
}
}
/**
* @param (TypeHint|null)[] $parametersTypeHints
* @param array<string, ParameterAnnotation|VariableAnnotation> $parametersAnnotations
*/
private function checkUselessAnnotations(
File $phpcsFile,
int $functionPointer,
array $parametersTypeHints,
array $parametersAnnotations
): void
{
$suppressName = self::getSniffName(self::CODE_USELESS_ANNOTATION);
$isSniffSuppressed = SuppressHelper::isSniffSuppressed($phpcsFile, $functionPointer, $suppressName);
$suppressUseless = true;
foreach ($parametersTypeHints as $parameterName => $parameterTypeHint) {
if (!array_key_exists($parameterName, $parametersAnnotations)) {
continue;
}
$parameterAnnotation = $parametersAnnotations[$parameterName];
if ($parameterAnnotation->getType() === null) {
continue;
}
if (!AnnotationHelper::isAnnotationUseless(
$phpcsFile,
$functionPointer,
$parameterTypeHint,
$parameterAnnotation,
$this->getTraversableTypeHints(),
$this->enableUnionTypeHint,
$this->enableIntersectionTypeHint
)) {
continue;
}
$suppressUseless = false;
if ($isSniffSuppressed) {
continue;
}
$fix = $phpcsFile->addFixableError(
sprintf(
'%s %s() has useless @param annotation for parameter %s.',
FunctionHelper::getTypeLabel($phpcsFile, $functionPointer),
FunctionHelper::getFullyQualifiedName($phpcsFile, $functionPointer),
$parameterName
),
$parameterAnnotation->getStartPointer(),
self::CODE_USELESS_ANNOTATION
);
if (!$fix) {
continue;
}
$docCommentOpenPointer = $parameterAnnotation instanceof VariableAnnotation
? TokenHelper::findPrevious($phpcsFile, T_DOC_COMMENT_OPEN_TAG, $parameterAnnotation->getStartPointer() - 1)
: DocCommentHelper::findDocCommentOpenPointer($phpcsFile, $functionPointer);
$starPointer = TokenHelper::findPrevious(
$phpcsFile,
T_DOC_COMMENT_STAR,
$parameterAnnotation->getStartPointer() - 1,
$docCommentOpenPointer
);
$changeStart = $starPointer ?? $docCommentOpenPointer + 1;
/** @var int $changeEnd */
$changeEnd = TokenHelper::findNext(
$phpcsFile,
[T_DOC_COMMENT_CLOSE_TAG, T_DOC_COMMENT_STAR],
$parameterAnnotation->getEndPointer() + 1
) - 1;
$phpcsFile->fixer->beginChangeset();
for ($i = $changeStart; $i <= $changeEnd; $i++) {
$phpcsFile->fixer->replaceToken($i, '');
}
$phpcsFile->fixer->endChangeset();
}
if ($isSniffSuppressed && $suppressUseless) {
$this->reportUselessSuppress($phpcsFile, $functionPointer, $suppressName);
}
}
private function reportUselessSuppress(File $phpcsFile, int $pointer, string $suppressName): void
{
$fix = $phpcsFile->addFixableError(
sprintf('Useless %s %s', SuppressHelper::ANNOTATION, $suppressName),
$pointer,
self::CODE_USELESS_SUPPRESS
);
if ($fix) {
SuppressHelper::removeSuppressAnnotation($phpcsFile, $pointer, $suppressName);
}
}
private function getSniffName(string $sniffName): string
{
return sprintf('%s.%s', self::NAME, $sniffName);
}
/**
* @return array<int, string>
*/
private function getTraversableTypeHints(): array
{
if ($this->normalizedTraversableTypeHints === null) {
$this->normalizedTraversableTypeHints = array_map(static function (string $typeHint): string {
return NamespaceHelper::isFullyQualifiedName($typeHint)
? $typeHint
: sprintf('%s%s', NamespaceHelper::NAMESPACE_SEPARATOR, $typeHint);
}, SniffSettingsHelper::normalizeArray($this->traversableTypeHints));
}
return $this->normalizedTraversableTypeHints;
}
}