Completed
Push — master ( 3e29f4...a0257c )
by Gytis
03:40 queued 11s
created

FqcnMethodSniff::hasUselessDocBlock()   C

Complexity

Conditions 15
Paths 20

Size

Total Lines 49
Code Lines 30

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 29
CRAP Score 15.0603

Importance

Changes 3
Bugs 0 Features 0
Metric Value
cc 15
eloc 30
c 3
b 0
f 0
nc 20
nop 1
dl 0
loc 49
ccs 29
cts 31
cp 0.9355
crap 15.0603
rs 5.9166

How to fix   Complexity   

Long Method

Small methods make your code easier to understand, in particular if combined with a good name. Besides, if your method is small, finding a good name is usually much easier.

For example, if you find yourself adding comments to a method's body, this is usually a good sign to extract the commented part to a new method, and use the comment as a starting point when coming up with a good name for this new method.

Commonly applied refactorings include:

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<?php
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namespace Gskema\TypeSniff\Sniffs\CodeElement;
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use Gskema\TypeSniff\Inspection\FnTypeInspector;
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use Gskema\TypeSniff\Inspection\DocTypeInspector;
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use Gskema\TypeSniff\Inspection\Subject\AbstractTypeSubject;
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use Gskema\TypeSniff\Inspection\Subject\ParamTypeSubject;
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use Gskema\TypeSniff\Inspection\Subject\ReturnTypeSubject;
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use PHP_CodeSniffer\Files\File;
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use Gskema\TypeSniff\Core\CodeElement\Element\AbstractFqcnMethodElement;
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use Gskema\TypeSniff\Core\CodeElement\Element\ClassMethodElement;
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use Gskema\TypeSniff\Core\CodeElement\Element\CodeElementInterface;
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use Gskema\TypeSniff\Core\CodeElement\Element\InterfaceMethodElement;
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use Gskema\TypeSniff\Core\DocBlock\DocBlock;
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use Gskema\TypeSniff\Core\DocBlock\UndefinedDocBlock;
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use Gskema\TypeSniff\Core\Type\Declaration\NullableType;
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class FqcnMethodSniff implements CodeElementSniffInterface
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{
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    protected const CODE = 'FqcnMethodSniff';
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    /** @var string[] */
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    protected $baseUsefulTags = [
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        '@deprecated',
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        '@throws',
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        '@dataProvider',
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        '@see',
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        '@todo',
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        '@inheritDoc'
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    ];
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    /** @var string[] */
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    protected $usefulTags = [];
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    /**
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     * @inheritDoc
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     */
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    public function configure(array $config): void
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    {
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        $rawTags = array_merge($this->baseUsefulTags, $config['usefulTags'] ?? []);
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        $usefulTags = [];
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        foreach ($rawTags as $rawTag) {
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            $usefulTags[] = strtolower(ltrim($rawTag, '@'));
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        }
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        $usefulTags = array_unique($usefulTags);
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        $this->usefulTags = $usefulTags;
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    }
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    /**
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     * @inheritDoc
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     */
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    public function register(): array
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    {
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        return [
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            ClassMethodElement::class,
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            // TraitMethodElement::class, // can be used to implement interface, not possible to know if it is extended
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            InterfaceMethodElement::class,
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        ];
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    }
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    /**
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     * @inheritDoc
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     * @param AbstractFqcnMethodElement $method
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     */
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    public function process(File $file, CodeElementInterface $method): void
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    {
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        $warningCountBefore = $file->getWarningCount();
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        $this->processMethod($file, $method);
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        $hasNewWarnings = $file->getWarningCount() > $warningCountBefore;
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        if (!$hasNewWarnings && $this->hasUselessDocBlock($method)) {
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            $file->addWarningOnLine('Useless PHPDoc', $method->getLine(), static::CODE);
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        }
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    }
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    protected function processMethod(File $file, AbstractFqcnMethodElement $method): void
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    {
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        $fnSig = $method->getSignature();
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        $docBlock = $method->getDocBlock();
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        $isMagicMethod = '__' === substr($fnSig->getName(), 0, 2);
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        $isConstructMethod = '__construct' === $fnSig->getName();
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        $hasInheritDocTag = $docBlock->hasTag('inheritdoc');
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        // @inheritDoc
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        // __construct can be detected as extended and magic, but we want to inspect it anyway
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        if (!$isConstructMethod) {
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            if ($hasInheritDocTag || $isMagicMethod) {
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                return;
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            } elseif ($method->isExtended()) {
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                $file->addWarningOnLine('Missing @inheritDoc tag. Remove duplicated parent PHPDoc content.', $method->getLine(), static::CODE);
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                return;
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            }
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        }
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        // @param
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        foreach ($fnSig->getParams() as $fnParam) {
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            $paramTag = $docBlock->getParamTag($fnParam->getName());
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            $subject = ParamTypeSubject::fromParam($fnParam, $paramTag, $docBlock);
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            $this->processSigType($file, $docBlock, $subject);
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        }
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        // @return
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        if (!$isConstructMethod) {
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            $returnTag = $docBlock->getReturnTag();
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            $subject = ReturnTypeSubject::fromSignature($fnSig, $returnTag, $docBlock);
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            $this->processSigType($file, $docBlock, $subject);
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        } else {
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            foreach ($docBlock->getDescriptionLines() as $lineNum => $descLine) {
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                if (preg_match('#^\w+\s+constructor\.?$#', $descLine)) {
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                    $file->addWarningOnLine('Useless description.', $lineNum, static::CODE);
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                }
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            }
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        }
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    }
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    protected function processSigType(File $file, DocBlock $docBlock, AbstractTypeSubject $subject): void
0 ignored issues
show
Unused Code introduced by
The parameter $docBlock is not used and could be removed. ( Ignorable by Annotation )

If this is a false-positive, you can also ignore this issue in your code via the ignore-unused  annotation

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    protected function processSigType(File $file, /** @scrutinizer ignore-unused */ DocBlock $docBlock, AbstractTypeSubject $subject): void

This check looks for parameters that have been defined for a function or method, but which are not used in the method body.

Loading history...
121
    {
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        FnTypeInspector::reportMandatoryTypes($subject);
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        FnTypeInspector::reportSuggestedTypes($subject);
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        FnTypeInspector::reportReplaceableTypes($subject);
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        DocTypeInspector::reportMandatoryTypes($subject);
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        DocTypeInspector::reportSuggestedTypes($subject);
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        DocTypeInspector::reportReplaceableTypes($subject);
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        DocTypeInspector::reportRemovableTypes($subject);
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        DocTypeInspector::reportInvalidTypes($subject);
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        DocTypeInspector::reportMissingOrWrongTypes($subject);
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        $subject->writeWarningsTo($file, static::CODE);
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    }
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    protected function hasUselessDocBlock(AbstractFqcnMethodElement $method): bool
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    {
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        $fnSig = $method->getSignature();
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        $docBlock = $method->getDocBlock();
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        $usefulTagNames = array_diff($this->usefulTags, ['param', 'return']);
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        $docReturnTag = $docBlock->getReturnTag();
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        if ($docBlock instanceof UndefinedDocBlock
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            || $docBlock->hasDescription()
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            || $docBlock->hasOneOfTags($usefulTagNames)
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            || ($docReturnTag && $docReturnTag->hasDescription())
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        ) {
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            return false;
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        }
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        foreach ($fnSig->getParams() as $fnParam) {
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            $paramTag = $docBlock->getParamTag($fnParam->getName());
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            if (null === $paramTag) {
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                continue;
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            }
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            if ($paramTag->hasDescription()) {
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                return false;
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            }
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            $fnType = $fnParam->getType();
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            $rawFnType = $fnType instanceof NullableType
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                ? $fnType->toDocString()
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                : $fnType->toString();
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            if ($paramTag->getType()->toString() !== $rawFnType) {
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                return false;
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            }
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        }
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        $returnTag  = $docBlock->getReturnTag();
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        $returnType = $fnSig->getReturnType();
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        if ($returnTag && $returnType) {
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            $rawReturnType = $returnType instanceof NullableType
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                ? $returnType->toDocString()
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                : $returnType->toString();
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            if ($returnTag->getType()->toString() !== $rawReturnType) {
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                return false;
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            }
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        }
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        return true;
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    }
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}
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