mirror of https://github.com/rectorphp/rector.git
205 lines
6.9 KiB
PHP
205 lines
6.9 KiB
PHP
<?php
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declare (strict_types=1);
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namespace Rector\PostRector\Rector;
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use RectorPrefix202305\Nette\Utils\Strings;
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use PhpParser\Node;
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use PhpParser\Node\Identifier;
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use PhpParser\Node\Name;
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use PhpParser\Node\Name\FullyQualified;
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use PhpParser\Node\Stmt\Namespace_;
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use PhpParser\Node\Stmt\Use_;
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use PhpParser\Node\Stmt\UseUse;
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use PhpParser\NodeTraverser;
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use Rector\BetterPhpDocParser\PhpDocInfo\PhpDocInfoFactory;
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use Rector\Core\Configuration\RectorConfigProvider;
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use Rector\Core\PhpParser\Node\CustomNode\FileWithoutNamespace;
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use Rector\NodeTypeResolver\Node\AttributeKey;
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use Rector\PhpDocParser\NodeTraverser\SimpleCallableNodeTraverser;
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use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
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use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
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final class UnusedImportRemovingPostRector extends \Rector\PostRector\Rector\AbstractPostRector
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{
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/**
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* @readonly
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* @var \Rector\PhpDocParser\NodeTraverser\SimpleCallableNodeTraverser
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*/
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private $simpleCallableNodeTraverser;
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/**
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* @readonly
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* @var \Rector\BetterPhpDocParser\PhpDocInfo\PhpDocInfoFactory
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*/
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private $phpDocInfoFactory;
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/**
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* @readonly
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* @var \Rector\Core\Configuration\RectorConfigProvider
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*/
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private $rectorConfigProvider;
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public function __construct(SimpleCallableNodeTraverser $simpleCallableNodeTraverser, PhpDocInfoFactory $phpDocInfoFactory, RectorConfigProvider $rectorConfigProvider)
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{
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$this->simpleCallableNodeTraverser = $simpleCallableNodeTraverser;
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$this->phpDocInfoFactory = $phpDocInfoFactory;
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$this->rectorConfigProvider = $rectorConfigProvider;
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}
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public function enterNode(Node $node) : ?Node
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{
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if (!$this->rectorConfigProvider->shouldRemoveUnusedImports()) {
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return null;
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}
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if (!$node instanceof Namespace_ && !$node instanceof FileWithoutNamespace) {
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return null;
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}
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$hasChanged = \false;
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$names = $this->resolveUsedPhpAndDocNames($node);
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foreach ($node->stmts as $key => $namespaceStmt) {
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if (!$namespaceStmt instanceof Use_) {
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continue;
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}
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if ($namespaceStmt->uses === []) {
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unset($node->stmts[$key]);
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$hasChanged = \true;
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continue;
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}
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$useUse = $namespaceStmt->uses[0];
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if ($this->isUseImportUsed($useUse, $names)) {
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continue;
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}
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unset($node->stmts[$key]);
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$hasChanged = \true;
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}
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if ($hasChanged === \false) {
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return null;
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}
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$node->stmts = \array_values($node->stmts);
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return $node;
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}
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/**
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* The higher, the later
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*/
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public function getPriority() : int
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{
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// run this last
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return 100;
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}
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public function getRuleDefinition() : RuleDefinition
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{
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return new RuleDefinition('Removes unused import names', [new CodeSample(<<<'CODE_SAMPLE'
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namespace App;
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use App\SomeUnusedClass;
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class SomeClass
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{
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}
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CODE_SAMPLE
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, <<<'CODE_SAMPLE'
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namespace App;
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class SomeClass
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{
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}
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CODE_SAMPLE
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)]);
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}
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/**
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* @return string[]
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* @param \PhpParser\Node\Stmt\Namespace_|\Rector\Core\PhpParser\Node\CustomNode\FileWithoutNamespace $namespace
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*/
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private function findNonUseImportNames($namespace) : array
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{
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$names = [];
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$this->simpleCallableNodeTraverser->traverseNodesWithCallable($namespace, static function (Node $node) use(&$names) {
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if ($node instanceof Use_) {
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return NodeTraverser::DONT_TRAVERSE_CURRENT_AND_CHILDREN;
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}
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if (!$node instanceof Name) {
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return null;
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}
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$names[] = $node->toString();
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if ($node instanceof FullyQualified) {
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$originalName = $node->getAttribute(AttributeKey::ORIGINAL_NAME);
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if ($originalName instanceof Name) {
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// collect original Name as well to cover namespaced used
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$names[] = $originalName->toString();
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}
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}
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return $node;
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});
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return $names;
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}
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/**
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* @return string[]
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* @param \PhpParser\Node\Stmt\Namespace_|\Rector\Core\PhpParser\Node\CustomNode\FileWithoutNamespace $namespace
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*/
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private function findNamesInDocBlocks($namespace) : array
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{
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$names = [];
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$this->simpleCallableNodeTraverser->traverseNodesWithCallable($namespace, function (Node $node) use(&$names) {
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if (!$node->hasAttribute(AttributeKey::COMMENTS)) {
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return null;
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}
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$phpDocInfo = $this->phpDocInfoFactory->createFromNodeOrEmpty($node);
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$names = \array_merge($names, $phpDocInfo->getAnnotationClassNames());
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$constFetchNodeNames = $phpDocInfo->getConstFetchNodeClassNames();
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$names = \array_merge($names, $constFetchNodeNames);
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$genericTagClassNames = $phpDocInfo->getGenericTagClassNames();
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$names = \array_merge($names, $genericTagClassNames);
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});
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return $names;
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}
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/**
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* @return string[]
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* @param \PhpParser\Node\Stmt\Namespace_|\Rector\Core\PhpParser\Node\CustomNode\FileWithoutNamespace $namespace
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*/
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private function resolveUsedPhpAndDocNames($namespace) : array
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{
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$phpNames = $this->findNonUseImportNames($namespace);
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$docBlockNames = $this->findNamesInDocBlocks($namespace);
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$names = \array_merge($phpNames, $docBlockNames);
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return \array_unique($names);
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}
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private function resolveAliasName(UseUse $useUse) : ?string
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{
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return $useUse->alias instanceof Identifier ? $useUse->alias->toString() : null;
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}
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/**
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* @param string[] $names
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*/
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private function isUseImportUsed(UseUse $useUse, array $names) : bool
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{
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$comparedName = $useUse->name->toString();
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if (\in_array($comparedName, $names, \true)) {
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return \true;
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}
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$namespacedPrefix = Strings::after($comparedName, '\\', -1) . '\\';
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if ($namespacedPrefix === '\\') {
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$namespacedPrefix = $comparedName . '\\';
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}
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$alias = $this->resolveAliasName($useUse);
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// match partial import
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foreach ($names as $name) {
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if (\substr_compare($comparedName, $name, -\strlen($name)) === 0) {
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return \true;
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}
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if (\strncmp($name, $namespacedPrefix, \strlen($namespacedPrefix)) === 0) {
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return \true;
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}
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if (!\is_string($alias)) {
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continue;
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}
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if ($alias === $name) {
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return \true;
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}
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if (\strpos($name, '\\') === \false) {
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continue;
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}
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$namePrefix = Strings::before($name, '\\', 1);
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if ($alias === $namePrefix) {
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return \true;
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}
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}
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return \false;
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}
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}
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