%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
declare (strict_types=1);
namespace Rector\Core\PhpParser\Comparing;
use PhpParser\Node;
use PhpParser\Node\Expr\Assign;
use PhpParser\Node\Expr\Variable;
use PhpParser\Node\Stmt;
use PhpParser\Node\Stmt\Else_;
use PhpParser\Node\Stmt\Expression;
use PhpParser\Node\Stmt\If_;
use Rector\Core\PhpParser\Node\BetterNodeFinder;
final class ConditionSearcher
{
/**
* @readonly
* @var \Rector\Core\PhpParser\Node\BetterNodeFinder
*/
private $betterNodeFinder;
/**
* @readonly
* @var \Rector\Core\PhpParser\Comparing\NodeComparator
*/
private $nodeComparator;
public function __construct(BetterNodeFinder $betterNodeFinder, \Rector\Core\PhpParser\Comparing\NodeComparator $nodeComparator)
{
$this->betterNodeFinder = $betterNodeFinder;
$this->nodeComparator = $nodeComparator;
}
public function hasIfAndElseForVariableRedeclaration(Assign $assign, If_ $if) : bool
{
if (!$if->else instanceof Else_) {
return \false;
}
$ifElse = $if->else;
/** @var Variable $varNode */
$varNode = $assign->var;
if (!$this->hasVariableRedeclaration($varNode, $if->stmts)) {
return \false;
}
foreach ($if->elseifs as $elseifNode) {
if (!$this->hasVariableRedeclaration($varNode, $elseifNode->stmts)) {
return \false;
}
}
$isInCond = (bool) $this->betterNodeFinder->findFirst($if->cond, function (Node $subNode) use($varNode) : bool {
return $this->nodeComparator->areNodesEqual($varNode, $subNode);
});
if ($isInCond) {
return \false;
}
return $this->hasVariableRedeclaration($varNode, $ifElse->stmts);
}
/**
* @param Stmt[] $stmts
*/
private function hasVariableRedeclaration(Variable $variable, array $stmts) : bool
{
foreach ($stmts as $stmt) {
if ($this->hasVariableUsedInExpression($variable, $stmt)) {
return \false;
}
if ($this->hasVariableDeclaration($variable, $stmt)) {
return \true;
}
}
return \false;
}
private function hasVariableUsedInExpression(Variable $variable, Stmt $stmt) : bool
{
if ($stmt instanceof Expression) {
$node = $stmt->expr instanceof Assign ? $stmt->expr->expr : $stmt->expr;
} else {
$node = $stmt;
}
return (bool) $this->betterNodeFinder->findFirst($node, function (Node $subNode) use($variable) : bool {
return $this->nodeComparator->areNodesEqual($variable, $subNode);
});
}
private function hasVariableDeclaration(Variable $variable, Stmt $stmt) : bool
{
if (!$stmt instanceof Expression) {
return \false;
}
if (!$stmt->expr instanceof Assign) {
return \false;
}
$assign = $stmt->expr;
if (!$assign->var instanceof Variable) {
return \false;
}
$assignedVariable = $assign->var;
return $variable->name === $assignedVariable->name;
}
}
Zerion Mini Shell 1.0