mirror of https://github.com/rectorphp/rector.git
111 lines
3.0 KiB
PHP
111 lines
3.0 KiB
PHP
<?php
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declare (strict_types=1);
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namespace Rector\DeadCode\Rector\If_;
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use PhpParser\Node;
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use PhpParser\Node\Stmt;
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use PhpParser\Node\Stmt\Else_;
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use PhpParser\Node\Stmt\If_;
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use PhpParser\NodeTraverser;
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use Rector\DeadCode\ConditionEvaluator;
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use Rector\DeadCode\ConditionResolver;
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use Rector\DeadCode\Contract\ConditionInterface;
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use Rector\Rector\AbstractRector;
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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://www.php.net/manual/en/function.version-compare.php
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*
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* @see \Rector\Tests\DeadCode\Rector\If_\UnwrapFutureCompatibleIfPhpVersionRector\UnwrapFutureCompatibleIfPhpVersionRectorTest
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*/
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final class UnwrapFutureCompatibleIfPhpVersionRector extends AbstractRector
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{
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/**
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* @readonly
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* @var \Rector\DeadCode\ConditionEvaluator
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*/
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private $conditionEvaluator;
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/**
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* @readonly
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* @var \Rector\DeadCode\ConditionResolver
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*/
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private $conditionResolver;
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public function __construct(ConditionEvaluator $conditionEvaluator, ConditionResolver $conditionResolver)
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{
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$this->conditionEvaluator = $conditionEvaluator;
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$this->conditionResolver = $conditionResolver;
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}
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public function getRuleDefinition() : RuleDefinition
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{
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return new RuleDefinition('Remove php version checks if they are passed', [new CodeSample(<<<'CODE_SAMPLE'
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// current PHP: 7.2
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if (version_compare(PHP_VERSION, '7.2', '<')) {
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return 'is PHP 7.1-';
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} else {
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return 'is PHP 7.2+';
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}
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CODE_SAMPLE
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, <<<'CODE_SAMPLE'
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// current PHP: 7.2
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return 'is PHP 7.2+';
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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 [If_::class];
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}
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/**
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* @param If_ $node
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* @return Stmt[]|null|int
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*/
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public function refactor(Node $node)
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{
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if ($node->elseifs !== []) {
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return null;
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}
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$condition = $this->conditionResolver->resolveFromExpr($node->cond);
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if (!$condition instanceof ConditionInterface) {
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return null;
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}
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$result = $this->conditionEvaluator->evaluate($condition);
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if ($result === null) {
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return null;
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}
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// if is skipped
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if ($result === \true) {
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return $this->refactorIsMatch($node);
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}
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if ($result > 0) {
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return $this->refactorIsMatch($node);
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}
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return $this->refactorIsNotMatch($node);
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}
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/**
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* @return Stmt[]|null
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*/
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private function refactorIsMatch(If_ $if) : ?array
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{
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if ($if->elseifs !== []) {
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return null;
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}
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return $if->stmts;
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}
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/**
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* @return Stmt[]|int
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*/
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private function refactorIsNotMatch(If_ $if)
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{
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// no else → just remove the node
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if (!$if->else instanceof Else_) {
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return NodeTraverser::REMOVE_NODE;
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}
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// else is always used
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return $if->else->stmts;
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}
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}
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