mirror of https://github.com/rectorphp/rector.git
152 lines
5.1 KiB
PHP
152 lines
5.1 KiB
PHP
<?php
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declare (strict_types=1);
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namespace Rector\CodingStyle\Rector\FuncCall;
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use PhpParser\Node;
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use PhpParser\Node\Arg;
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use PhpParser\Node\Expr;
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use PhpParser\Node\Expr\Array_;
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use PhpParser\Node\Expr\BinaryOp\Greater;
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use PhpParser\Node\Expr\BinaryOp\Identical;
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use PhpParser\Node\Expr\BinaryOp\NotIdentical;
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use PhpParser\Node\Expr\BinaryOp\Smaller;
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use PhpParser\Node\Expr\BooleanNot;
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use PhpParser\Node\Expr\FuncCall;
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use PhpParser\Node\Scalar\LNumber;
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use PhpParser\Node\Stmt\ElseIf_;
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use PhpParser\Node\Stmt\If_;
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use Rector\Core\Rector\AbstractRector;
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use Rector\NodeTypeResolver\Node\AttributeKey;
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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\CodingStyle\Rector\FuncCall\CountArrayToEmptyArrayComparisonRector\CountArrayToEmptyArrayComparisonRectorTest
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*/
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final class CountArrayToEmptyArrayComparisonRector extends AbstractRector
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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 array comparison to empty array comparison to improve performance', [new CodeSample(<<<'CODE_SAMPLE'
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count($array) === 0;
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count($array) > 0;
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! count($array);
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CODE_SAMPLE
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, <<<'CODE_SAMPLE'
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$array === [];
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$array !== [];
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$array === [];
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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 [FuncCall::class, BooleanNot::class];
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}
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/**
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* @param FuncCall|BooleanNot $node
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*/
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public function refactor(Node $node) : ?Node
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{
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if ($node instanceof BooleanNot) {
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return $this->processMarkTruthyNegation($node);
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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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if (!isset($node->args[0])) {
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return null;
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}
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if (!$node->args[0] instanceof Arg) {
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return null;
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}
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/** @var Expr $expr */
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$expr = $node->args[0]->value;
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// not pass array type, skip
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if (!$this->isArray($expr)) {
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return null;
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}
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$parentNode = $node->getAttribute(AttributeKey::PARENT_NODE);
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if (!$parentNode instanceof Node) {
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return null;
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}
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$processIdentical = $this->processIdenticalOrNotIdentical($parentNode, $node, $expr);
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if ($processIdentical !== null) {
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return $processIdentical;
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}
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$processGreaterOrSmaller = $this->processGreaterOrSmaller($parentNode, $node, $expr);
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if ($processGreaterOrSmaller !== null) {
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return $processGreaterOrSmaller;
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}
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return $this->processMarkTruthy($parentNode, $node, $expr);
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}
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private function processMarkTruthyNegation(BooleanNot $booleanNot) : ?Identical
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{
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if (!$booleanNot->expr instanceof FuncCall) {
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return null;
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}
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if (!$this->isName($booleanNot->expr, 'count')) {
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return null;
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}
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if (!isset($booleanNot->expr->args[0])) {
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return null;
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}
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if (!$booleanNot->expr->args[0] instanceof Arg) {
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return null;
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}
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/** @var Expr $expr */
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$expr = $booleanNot->expr->args[0]->value;
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// not pass array type, skip
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if (!$this->isArray($expr)) {
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return null;
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}
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return new Identical($expr, new Array_([]));
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}
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private function isArray(Expr $expr) : bool
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{
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return $this->getType($expr)->isArray()->yes();
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}
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private function processIdenticalOrNotIdentical(Node $node, FuncCall $funcCall, Expr $expr) : ?Expr
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{
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if (($node instanceof Identical || $node instanceof NotIdentical) && $node->right instanceof LNumber && $node->right->value === 0) {
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$this->removeNode($funcCall);
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$node->right = new Array_([]);
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return $expr;
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}
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if (($node instanceof Identical || $node instanceof NotIdentical) && $node->left instanceof LNumber && $node->left->value === 0) {
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$this->removeNode($funcCall);
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$node->left = new Array_([]);
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return $expr;
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}
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return null;
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}
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private function processGreaterOrSmaller(Node $node, FuncCall $funcCall, Expr $expr) : ?NotIdentical
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{
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if ($node instanceof Greater && $node->right instanceof LNumber && $node->right->value === 0) {
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$this->removeNode($funcCall);
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$this->removeNode($node->right);
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return new NotIdentical($expr, new Array_([]));
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}
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if ($node instanceof Smaller && $node->left instanceof LNumber && $node->left->value === 0) {
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$this->removeNode($funcCall);
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$this->removeNode($node->left);
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return new NotIdentical(new Array_([]), $expr);
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}
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return null;
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}
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private function processMarkTruthy(Node $node, FuncCall $funcCall, Expr $expr) : ?Expr
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{
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if (!$node instanceof If_ && !$node instanceof ElseIf_) {
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return null;
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}
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if ($node->cond === $funcCall) {
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$node->cond = new NotIdentical($expr, new Array_([]));
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return $node->cond;
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}
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return null;
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}
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}
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