mirror of
https://github.com/rectorphp/rector.git
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142 lines
3.2 KiB
PHP
142 lines
3.2 KiB
PHP
<?php
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declare(strict_types=1);
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namespace Rector\CodeQuality\Rector\Concat;
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use Nette\Utils\Strings;
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use PhpParser\Node;
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use PhpParser\Node\Expr\BinaryOp\Concat;
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use PhpParser\Node\Scalar\String_;
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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\CodeQuality\Rector\Concat\JoinStringConcatRector\JoinStringConcatRectorTest
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*/
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final class JoinStringConcatRector extends AbstractRector
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{
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/**
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* @var int
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*/
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private const LINE_BREAK_POINT = 100;
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/**
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* @var bool
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*/
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private $nodeReplacementIsRestricted = false;
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public function getRuleDefinition(): RuleDefinition
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{
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return new RuleDefinition(
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'Joins concat of 2 strings, unless the length is too long',
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[
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new CodeSample(
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<<<'CODE_SAMPLE'
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class SomeClass
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{
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public function run()
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{
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$name = 'Hi' . ' Tom';
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}
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}
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CODE_SAMPLE
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,
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<<<'CODE_SAMPLE'
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class SomeClass
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{
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public function run()
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{
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$name = 'Hi Tom';
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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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/**
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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 [Concat::class];
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}
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/**
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* @param Concat $node
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*/
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public function refactor(Node $node): ?Node
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{
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$this->nodeReplacementIsRestricted = false;
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if (! $this->isTopMostConcatNode($node)) {
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return null;
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}
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$joinedNode = $this->joinConcatIfStrings($node);
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if (! $joinedNode instanceof String_) {
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return null;
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}
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if ($this->nodeReplacementIsRestricted) {
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return null;
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}
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return $joinedNode;
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}
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private function isTopMostConcatNode(Concat $concat): bool
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{
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$parent = $concat->getAttribute(AttributeKey::PARENT_NODE);
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return ! $parent instanceof Concat;
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}
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/**
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* @return Concat|String_
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*/
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private function joinConcatIfStrings(Concat $node): Node
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{
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$concat = clone $node;
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if ($concat->left instanceof Concat) {
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$concat->left = $this->joinConcatIfStrings($concat->left);
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}
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if ($concat->right instanceof Concat) {
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$concat->right = $this->joinConcatIfStrings($concat->right);
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}
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if (! $concat->left instanceof String_) {
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return $node;
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}
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if (! $concat->right instanceof String_) {
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return $node;
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}
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$leftValue = $concat->left->value;
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$rightValue = $concat->right->value;
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if ($leftValue === "\n") {
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$this->nodeReplacementIsRestricted = true;
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return $node;
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}
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if ($rightValue === "\n") {
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$this->nodeReplacementIsRestricted = true;
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return $node;
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}
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$resultString = new String_($leftValue . $rightValue);
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if (Strings::length($resultString->value) >= self::LINE_BREAK_POINT) {
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$this->nodeReplacementIsRestricted = true;
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return $node;
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}
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return $resultString;
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}
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}
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