mirror of https://github.com/rectorphp/rector.git
161 lines
5.0 KiB
PHP
161 lines
5.0 KiB
PHP
<?php
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declare (strict_types=1);
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namespace Rector\Privatization\Rector\Class_;
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use PhpParser\Node;
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use PhpParser\Node\Expr\Assign;
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use PhpParser\Node\Expr\PropertyFetch;
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use PhpParser\Node\Expr\Variable;
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use PhpParser\Node\Stmt\Class_;
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use PhpParser\Node\Stmt\ClassMethod;
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use PhpParser\Node\Stmt\Global_;
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use PhpParser\NodeTraverser;
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use Rector\Core\Rector\AbstractRector;
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use Rector\PostRector\Collector\PropertyToAddCollector;
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use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
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use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
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/**
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* @changelog https://3v4l.org/DWC4P
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*
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* @changelog https://stackoverflow.com/a/12446305/1348344
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* @see \Rector\Tests\Privatization\Rector\Class_\ChangeGlobalVariablesToPropertiesRector\ChangeGlobalVariablesToPropertiesRectorTest
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*/
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final class ChangeGlobalVariablesToPropertiesRector extends AbstractRector
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{
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/**
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* @var string[]
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*/
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private $globalVariableNames = [];
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/**
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* @readonly
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* @var \Rector\PostRector\Collector\PropertyToAddCollector
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*/
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private $propertyToAddCollector;
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public function __construct(PropertyToAddCollector $propertyToAddCollector)
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{
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$this->propertyToAddCollector = $propertyToAddCollector;
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}
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public function getRuleDefinition() : RuleDefinition
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{
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return new RuleDefinition('Change global $variables to private properties', [new CodeSample(<<<'CODE_SAMPLE'
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class SomeClass
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{
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public function go()
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{
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global $variable;
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$variable = 5;
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}
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public function run()
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{
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global $variable;
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var_dump($variable);
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}
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}
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CODE_SAMPLE
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, <<<'CODE_SAMPLE'
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class SomeClass
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{
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private $variable;
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public function go()
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{
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$this->variable = 5;
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}
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public function run()
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{
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var_dump($this->variable);
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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 array<class-string<Node>>
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*/
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public function getNodeTypes() : array
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{
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return [Class_::class];
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}
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/**
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* @param Class_ $node
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*/
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public function refactor(Node $node) : ?Node
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{
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foreach ($node->getMethods() as $classMethod) {
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$this->collectGlobalVariableNamesAndRefactorToPropertyFetch($node, $classMethod);
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}
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if ($this->globalVariableNames === []) {
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return null;
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}
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foreach ($this->globalVariableNames as $globalVariableName) {
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$this->propertyToAddCollector->addPropertyWithoutConstructorToClass($globalVariableName, null, $node);
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}
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return $node;
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}
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private function collectGlobalVariableNamesAndRefactorToPropertyFetch(Class_ $class, ClassMethod $classMethod) : void
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{
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$this->globalVariableNames = [];
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$this->traverseNodesWithCallable($classMethod, function (Node $node) use($class) {
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if ($node instanceof Global_) {
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$this->refactorGlobal($class, $node);
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return NodeTraverser::DONT_TRAVERSE_CHILDREN;
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}
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if ($node instanceof Variable) {
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return $this->refactorGlobalVariable($node);
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}
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return null;
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});
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}
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private function refactorGlobal(Class_ $class, Global_ $global) : void
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{
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foreach ($global->vars as $var) {
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$varName = $this->getName($var);
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if ($varName === null) {
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return;
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}
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if ($this->isReadOnly($class, $varName)) {
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return;
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}
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$this->globalVariableNames[] = $varName;
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}
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$this->removeNode($global);
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}
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private function refactorGlobalVariable(Variable $variable) : ?PropertyFetch
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{
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if (!$this->isNames($variable, $this->globalVariableNames)) {
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return null;
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}
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// replace with property fetch
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$variableName = $this->getName($variable);
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if ($variableName === null) {
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return null;
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}
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return $this->nodeFactory->createPropertyFetch('this', $variableName);
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}
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private function isReadOnly(Class_ $class, string $globalVariableName) : bool
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{
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/** @var ClassMethod[] $classMethods */
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$classMethods = $this->betterNodeFinder->findInstanceOf($class, ClassMethod::class);
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foreach ($classMethods as $classMethod) {
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$isReAssign = (bool) $this->betterNodeFinder->findFirst((array) $classMethod->stmts, function (Node $node) use($globalVariableName) : bool {
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if (!$node instanceof Assign) {
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return \false;
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}
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if ($node->var instanceof Variable) {
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return $this->nodeNameResolver->isName($node->var, $globalVariableName);
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}
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if ($node->var instanceof PropertyFetch) {
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return $this->nodeNameResolver->isName($node->var, $globalVariableName);
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}
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return \false;
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});
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if ($isReAssign) {
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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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