mirror of https://github.com/rectorphp/rector.git
95 lines
2.7 KiB
PHP
95 lines
2.7 KiB
PHP
<?php
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declare (strict_types=1);
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namespace Rector\CodeQuality\Rector\For_;
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use PhpParser\Node;
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use PhpParser\Node\Expr\Assign;
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use PhpParser\Node\Expr\FuncCall;
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use PhpParser\Node\Expr\Variable;
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use PhpParser\Node\Stmt;
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use PhpParser\Node\Stmt\Expression;
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use PhpParser\Node\Stmt\For_;
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use PHPStan\Analyser\Scope;
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use Rector\Core\Rector\AbstractScopeAwareRector;
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use Rector\Naming\Naming\VariableNaming;
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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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* @see \Rector\Tests\CodeQuality\Rector\For_\ForRepeatedCountToOwnVariableRector\ForRepeatedCountToOwnVariableRectorTest
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*/
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final class ForRepeatedCountToOwnVariableRector extends AbstractScopeAwareRector
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{
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/**
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* @readonly
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* @var \Rector\Naming\Naming\VariableNaming
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*/
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private $variableNaming;
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public function __construct(VariableNaming $variableNaming)
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{
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$this->variableNaming = $variableNaming;
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}
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public function getRuleDefinition() : RuleDefinition
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{
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return new RuleDefinition('Change count() in for function to own variable', [new CodeSample(<<<'CODE_SAMPLE'
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class SomeClass
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{
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public function run($items)
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{
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for ($i = 5; $i <= count($items); $i++) {
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echo $items[$i];
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}
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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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public function run($items)
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{
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$itemsCount = count($items);
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for ($i = 5; $i <= $itemsCount; $i++) {
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echo $items[$i];
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}
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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 [For_::class];
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}
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/**
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* @param For_ $node
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* @return Stmt[]|null
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*/
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public function refactorWithScope(Node $node, Scope $scope) : ?array
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{
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$countInCond = null;
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$variableName = null;
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$this->traverseNodesWithCallable($node->cond, function (Node $node) use(&$countInCond, &$variableName, $scope) : ?Variable {
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if (!$node instanceof FuncCall) {
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return null;
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}
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if (!$this->isName($node, 'count')) {
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return null;
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}
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$countInCond = $node;
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$variableName = $this->variableNaming->resolveFromFuncCallFirstArgumentWithSuffix($node, 'Count', 'itemsCount', $scope);
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return new Variable($variableName);
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});
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if (!$countInCond instanceof FuncCall) {
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return null;
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}
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if ($variableName === null) {
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return null;
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}
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$countAssign = new Assign(new Variable($variableName), $countInCond);
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return [new Expression($countAssign), $node];
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}
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}
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