mirror of https://github.com/rectorphp/rector.git
119 lines
4.4 KiB
PHP
119 lines
4.4 KiB
PHP
<?php
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declare (strict_types=1);
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namespace Rector\Php72\Rector\Assign;
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use PhpParser\Node;
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use PhpParser\Node\Expr\ArrayItem;
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use PhpParser\Node\Expr\Assign;
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use PhpParser\Node\Stmt;
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use PhpParser\Node\Stmt\Expression;
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use Rector\Exception\ShouldNotHappenException;
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use Rector\NodeManipulator\AssignManipulator;
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use Rector\Php72\ValueObject\ListAndEach;
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use Rector\Rector\AbstractRector;
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use Rector\ValueObject\PhpVersionFeature;
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use Rector\VersionBonding\Contract\MinPhpVersionInterface;
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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://wiki.php.net/rfc/deprecations_php_7_2#each
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*
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* @see \Rector\Tests\Php72\Rector\Assign\ListEachRector\ListEachRectorTest
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*/
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final class ListEachRector extends AbstractRector implements MinPhpVersionInterface
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{
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/**
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* @readonly
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* @var \Rector\NodeManipulator\AssignManipulator
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*/
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private $assignManipulator;
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public function __construct(AssignManipulator $assignManipulator)
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{
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$this->assignManipulator = $assignManipulator;
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}
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public function provideMinPhpVersion() : int
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{
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return PhpVersionFeature::DEPRECATE_EACH;
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}
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public function getRuleDefinition() : RuleDefinition
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{
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return new RuleDefinition('each() function is deprecated, use key() and current() instead', [new CodeSample(<<<'CODE_SAMPLE'
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list($key, $callback) = each($callbacks);
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CODE_SAMPLE
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, <<<'CODE_SAMPLE'
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$key = key($callbacks);
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$callback = current($callbacks);
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next($callbacks);
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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 [Expression::class];
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}
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/**
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* @param Expression $node
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* @return null|Expression|Stmt[]
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*/
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public function refactor(Node $node)
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{
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if (!$node->expr instanceof Assign) {
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return null;
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}
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$listAndEach = $this->assignManipulator->matchListAndEach($node->expr);
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if (!$listAndEach instanceof ListAndEach) {
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return null;
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}
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if ($this->shouldSkipAssign($listAndEach)) {
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return null;
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}
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$list = $listAndEach->getList();
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$eachFuncCall = $listAndEach->getEachFuncCall();
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// only key: list($key, ) = each($values);
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if ($list->items[0] instanceof ArrayItem && !$list->items[1] instanceof ArrayItem) {
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$keyFuncCall = $this->nodeFactory->createFuncCall('key', $eachFuncCall->args);
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$keyFuncCallAssign = new Assign($list->items[0]->value, $keyFuncCall);
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return new Expression($keyFuncCallAssign);
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}
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// only value: list(, $value) = each($values);
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if ($list->items[1] instanceof ArrayItem && !$list->items[0] instanceof ArrayItem) {
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$nextFuncCall = $this->nodeFactory->createFuncCall('next', $eachFuncCall->args);
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$currentFuncCall = $this->nodeFactory->createFuncCall('current', $eachFuncCall->args);
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$secondArrayItem = $list->items[1];
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$currentAssign = new Assign($secondArrayItem->value, $currentFuncCall);
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return [new Expression($currentAssign), new Expression($nextFuncCall)];
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}
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// both: list($key, $value) = each($values);
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$currentFuncCall = $this->nodeFactory->createFuncCall('current', $eachFuncCall->args);
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$secondArrayItem = $list->items[1];
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if (!$secondArrayItem instanceof ArrayItem) {
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throw new ShouldNotHappenException();
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}
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$currentAssign = new Assign($secondArrayItem->value, $currentFuncCall);
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$nextFuncCall = $this->nodeFactory->createFuncCall('next', $eachFuncCall->args);
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$keyFuncCall = $this->nodeFactory->createFuncCall('key', $eachFuncCall->args);
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$firstArrayItem = $list->items[0];
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if (!$firstArrayItem instanceof ArrayItem) {
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throw new ShouldNotHappenException();
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}
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$keyAssign = new Assign($firstArrayItem->value, $keyFuncCall);
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return [new Expression($keyAssign), new Expression($currentAssign), new Expression($nextFuncCall)];
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}
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private function shouldSkipAssign(ListAndEach $listAndEach) : bool
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{
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$list = $listAndEach->getList();
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if (\count($list->items) !== 2) {
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return \true;
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}
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// empty list → cannot handle
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if ($list->items[0] instanceof ArrayItem) {
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return \false;
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}
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return !$list->items[1] instanceof ArrayItem;
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}
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}
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