| 1: | <?php declare(strict_types = 1); |
| 2: | |
| 3: | namespace PHPStan\Rules; |
| 4: | |
| 5: | use PhpParser\Node\Expr; |
| 6: | use PHPStan\Analyser\Scope; |
| 7: | use PHPStan\Reflection\ReflectionProvider; |
| 8: | use PHPStan\Type\BenevolentUnionType; |
| 9: | use PHPStan\Type\CallableType; |
| 10: | use PHPStan\Type\ClosureType; |
| 11: | use PHPStan\Type\ErrorType; |
| 12: | use PHPStan\Type\Generic\TemplateMixedType; |
| 13: | use PHPStan\Type\IntersectionType; |
| 14: | use PHPStan\Type\MixedType; |
| 15: | use PHPStan\Type\NeverType; |
| 16: | use PHPStan\Type\NullType; |
| 17: | use PHPStan\Type\StrictMixedType; |
| 18: | use PHPStan\Type\Type; |
| 19: | use PHPStan\Type\TypeCombinator; |
| 20: | use PHPStan\Type\TypeTraverser; |
| 21: | use PHPStan\Type\TypeUtils; |
| 22: | use PHPStan\Type\UnionType; |
| 23: | use PHPStan\Type\VerbosityLevel; |
| 24: | use function count; |
| 25: | use function sprintf; |
| 26: | use function str_contains; |
| 27: | |
| 28: | final class RuleLevelHelper |
| 29: | { |
| 30: | |
| 31: | public function __construct( |
| 32: | private ReflectionProvider $reflectionProvider, |
| 33: | private bool $checkNullables, |
| 34: | private bool $checkThisOnly, |
| 35: | private bool $checkUnionTypes, |
| 36: | private bool $checkExplicitMixed, |
| 37: | private bool $checkImplicitMixed, |
| 38: | private bool $checkBenevolentUnionTypes, |
| 39: | ) |
| 40: | { |
| 41: | } |
| 42: | |
| 43: | |
| 44: | public function isThis(Expr $expression): bool |
| 45: | { |
| 46: | return $expression instanceof Expr\Variable && $expression->name === 'this'; |
| 47: | } |
| 48: | |
| 49: | private function transformCommonType(Type $type): Type |
| 50: | { |
| 51: | if (!$this->checkExplicitMixed && !$this->checkImplicitMixed) { |
| 52: | return $type; |
| 53: | } |
| 54: | |
| 55: | return TypeTraverser::map($type, function (Type $type, callable $traverse) { |
| 56: | if ($type instanceof TemplateMixedType) { |
| 57: | if ($this->checkExplicitMixed) { |
| 58: | return $type->toStrictMixedType(); |
| 59: | } |
| 60: | } |
| 61: | if ( |
| 62: | $type instanceof MixedType |
| 63: | && ( |
| 64: | ($type->isExplicitMixed() && $this->checkExplicitMixed) |
| 65: | || (!$type->isExplicitMixed() && $this->checkImplicitMixed) |
| 66: | ) |
| 67: | ) { |
| 68: | return new StrictMixedType(); |
| 69: | } |
| 70: | |
| 71: | return $traverse($type); |
| 72: | }); |
| 73: | } |
| 74: | |
| 75: | |
| 76: | |
| 77: | |
| 78: | private function transformAcceptedType(Type $acceptingType, Type $acceptedType): array |
| 79: | { |
| 80: | $checkForUnion = $this->checkUnionTypes; |
| 81: | $acceptedType = TypeTraverser::map($acceptedType, function (Type $acceptedType, callable $traverse) use ($acceptingType, &$checkForUnion): Type { |
| 82: | if ($acceptedType instanceof CallableType) { |
| 83: | if ($acceptedType->isCommonCallable()) { |
| 84: | return $acceptedType; |
| 85: | } |
| 86: | |
| 87: | return new CallableType( |
| 88: | $acceptedType->getParameters(), |
| 89: | $traverse($this->transformCommonType($acceptedType->getReturnType())), |
| 90: | $acceptedType->isVariadic(), |
| 91: | $acceptedType->getTemplateTypeMap(), |
| 92: | $acceptedType->getResolvedTemplateTypeMap(), |
| 93: | $acceptedType->getTemplateTags(), |
| 94: | $acceptedType->isPure(), |
| 95: | ); |
| 96: | } |
| 97: | |
| 98: | if ($acceptedType instanceof ClosureType) { |
| 99: | if ($acceptedType->isCommonCallable()) { |
| 100: | return $acceptedType; |
| 101: | } |
| 102: | |
| 103: | return new ClosureType( |
| 104: | $acceptedType->getParameters(), |
| 105: | $traverse($this->transformCommonType($acceptedType->getReturnType())), |
| 106: | $acceptedType->isVariadic(), |
| 107: | $acceptedType->getTemplateTypeMap(), |
| 108: | $acceptedType->getResolvedTemplateTypeMap(), |
| 109: | $acceptedType->getCallSiteVarianceMap(), |
| 110: | $acceptedType->getTemplateTags(), |
| 111: | $acceptedType->getThrowPoints(), |
| 112: | $acceptedType->getImpurePoints(), |
| 113: | $acceptedType->getInvalidateExpressions(), |
| 114: | $acceptedType->getUsedVariables(), |
| 115: | $acceptedType->acceptsNamedArguments(), |
| 116: | ); |
| 117: | } |
| 118: | |
| 119: | if ( |
| 120: | !$this->checkNullables |
| 121: | && !$acceptingType instanceof NullType |
| 122: | && !$acceptedType instanceof NullType |
| 123: | && !$acceptedType instanceof BenevolentUnionType |
| 124: | ) { |
| 125: | return $traverse(TypeCombinator::removeNull($acceptedType)); |
| 126: | } |
| 127: | |
| 128: | if ($this->checkBenevolentUnionTypes) { |
| 129: | if ($acceptedType instanceof BenevolentUnionType) { |
| 130: | $checkForUnion = true; |
| 131: | return $traverse(TypeUtils::toStrictUnion($acceptedType)); |
| 132: | } |
| 133: | } |
| 134: | |
| 135: | return $traverse($this->transformCommonType($acceptedType)); |
| 136: | }); |
| 137: | |
| 138: | return [$acceptedType, $checkForUnion]; |
| 139: | } |
| 140: | |
| 141: | |
| 142: | public function accepts(Type $acceptingType, Type $acceptedType, bool $strictTypes): RuleLevelHelperAcceptsResult |
| 143: | { |
| 144: | [$acceptedType, $checkForUnion] = $this->transformAcceptedType($acceptingType, $acceptedType); |
| 145: | $acceptingType = $this->transformCommonType($acceptingType); |
| 146: | |
| 147: | $accepts = $acceptingType->accepts($acceptedType, $strictTypes); |
| 148: | |
| 149: | return new RuleLevelHelperAcceptsResult( |
| 150: | $checkForUnion ? $accepts->yes() : !$accepts->no(), |
| 151: | $accepts->reasons, |
| 152: | ); |
| 153: | } |
| 154: | |
| 155: | |
| 156: | |
| 157: | |
| 158: | |
| 159: | public function findTypeToCheck( |
| 160: | Scope $scope, |
| 161: | Expr $var, |
| 162: | string $unknownClassErrorPattern, |
| 163: | callable $unionTypeCriteriaCallback, |
| 164: | ): FoundTypeResult |
| 165: | { |
| 166: | if ($this->checkThisOnly && !$this->isThis($var)) { |
| 167: | return new FoundTypeResult(new ErrorType(), [], [], null); |
| 168: | } |
| 169: | $type = $scope->getType($var); |
| 170: | |
| 171: | return $this->findTypeToCheckImplementation($scope, $var, $type, $unknownClassErrorPattern, $unionTypeCriteriaCallback, true); |
| 172: | } |
| 173: | |
| 174: | |
| 175: | private function findTypeToCheckImplementation( |
| 176: | Scope $scope, |
| 177: | Expr $var, |
| 178: | Type $type, |
| 179: | string $unknownClassErrorPattern, |
| 180: | callable $unionTypeCriteriaCallback, |
| 181: | bool $isTopLevel = false, |
| 182: | ): FoundTypeResult |
| 183: | { |
| 184: | if (!$this->checkNullables && !$type->isNull()->yes()) { |
| 185: | $type = TypeCombinator::removeNull($type); |
| 186: | } |
| 187: | |
| 188: | if ( |
| 189: | ($this->checkExplicitMixed || $this->checkImplicitMixed) |
| 190: | && $type instanceof MixedType |
| 191: | && ($type->isExplicitMixed() ? $this->checkExplicitMixed : $this->checkImplicitMixed) |
| 192: | ) { |
| 193: | return new FoundTypeResult( |
| 194: | $type instanceof TemplateMixedType |
| 195: | ? $type->toStrictMixedType() |
| 196: | : new StrictMixedType(), |
| 197: | [], |
| 198: | [], |
| 199: | null, |
| 200: | ); |
| 201: | } |
| 202: | |
| 203: | if ($type instanceof MixedType || $type instanceof NeverType) { |
| 204: | return new FoundTypeResult(new ErrorType(), [], [], null); |
| 205: | } |
| 206: | |
| 207: | $errors = []; |
| 208: | $hasClassExistsClass = false; |
| 209: | $directClassNames = []; |
| 210: | |
| 211: | if ($isTopLevel) { |
| 212: | $directClassNames = $type->getObjectClassNames(); |
| 213: | foreach ($directClassNames as $referencedClass) { |
| 214: | if ($this->reflectionProvider->hasClass($referencedClass)) { |
| 215: | $classReflection = $this->reflectionProvider->getClass($referencedClass); |
| 216: | if (!$classReflection->isTrait()) { |
| 217: | continue; |
| 218: | } |
| 219: | } |
| 220: | |
| 221: | if ($scope->isInClassExists($referencedClass)) { |
| 222: | $hasClassExistsClass = true; |
| 223: | continue; |
| 224: | } |
| 225: | |
| 226: | $errors[] = RuleErrorBuilder::message(sprintf($unknownClassErrorPattern, $referencedClass)) |
| 227: | ->line($var->getStartLine()) |
| 228: | ->identifier('class.notFound') |
| 229: | ->discoveringSymbolsTip() |
| 230: | ->build(); |
| 231: | } |
| 232: | } |
| 233: | |
| 234: | if (count($errors) > 0 || $hasClassExistsClass) { |
| 235: | return new FoundTypeResult(new ErrorType(), [], $errors, null); |
| 236: | } |
| 237: | |
| 238: | if (!$this->checkUnionTypes && $type->isObject()->yes() && count($type->getObjectClassNames()) === 0) { |
| 239: | return new FoundTypeResult(new ErrorType(), [], [], null); |
| 240: | } |
| 241: | |
| 242: | if ($type instanceof UnionType) { |
| 243: | $shouldFilterUnion = ( |
| 244: | !$this->checkUnionTypes |
| 245: | && !$type instanceof BenevolentUnionType |
| 246: | ) || ( |
| 247: | !$this->checkBenevolentUnionTypes |
| 248: | && $type instanceof BenevolentUnionType |
| 249: | ); |
| 250: | |
| 251: | $newTypes = []; |
| 252: | |
| 253: | foreach ($type->getTypes() as $innerType) { |
| 254: | if ($shouldFilterUnion && !$unionTypeCriteriaCallback($innerType)) { |
| 255: | continue; |
| 256: | } |
| 257: | |
| 258: | $newTypes[] = $this->findTypeToCheckImplementation( |
| 259: | $scope, |
| 260: | $var, |
| 261: | $innerType, |
| 262: | $unknownClassErrorPattern, |
| 263: | $unionTypeCriteriaCallback, |
| 264: | )->getType(); |
| 265: | } |
| 266: | |
| 267: | if (count($newTypes) > 0) { |
| 268: | $newUnion = TypeCombinator::union(...$newTypes); |
| 269: | if ( |
| 270: | !$this->checkBenevolentUnionTypes |
| 271: | && $type instanceof BenevolentUnionType |
| 272: | ) { |
| 273: | $newUnion = TypeUtils::toBenevolentUnion($newUnion); |
| 274: | } |
| 275: | |
| 276: | return new FoundTypeResult($newUnion, $directClassNames, [], null); |
| 277: | } |
| 278: | } |
| 279: | |
| 280: | if ($type instanceof IntersectionType) { |
| 281: | $newTypes = []; |
| 282: | |
| 283: | $changed = false; |
| 284: | foreach ($type->getTypes() as $innerType) { |
| 285: | if ($innerType instanceof TemplateMixedType) { |
| 286: | $changed = true; |
| 287: | $newTypes[] = $this->findTypeToCheckImplementation( |
| 288: | $scope, |
| 289: | $var, |
| 290: | $innerType->toStrictMixedType(), |
| 291: | $unknownClassErrorPattern, |
| 292: | $unionTypeCriteriaCallback, |
| 293: | )->getType(); |
| 294: | continue; |
| 295: | } |
| 296: | $newTypes[] = $innerType; |
| 297: | } |
| 298: | |
| 299: | if ($changed) { |
| 300: | return new FoundTypeResult(TypeCombinator::intersect(...$newTypes), $directClassNames, [], null); |
| 301: | } |
| 302: | } |
| 303: | |
| 304: | $tip = null; |
| 305: | if (str_contains($type->describe(VerbosityLevel::typeOnly()), 'PhpParser\\Node\\Arg|PhpParser\\Node\\VariadicPlaceholder') && !$unionTypeCriteriaCallback($type)) { |
| 306: | $tip = 'Use <fg=cyan>->getArgs()</> instead of <fg=cyan>->args</>.'; |
| 307: | } |
| 308: | |
| 309: | return new FoundTypeResult($type, $directClassNames, [], $tip); |
| 310: | } |
| 311: | |
| 312: | } |
| 313: | |