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<?php declare(strict_types=1);
/*
* This file is part of sebastian/complexity.
*
* (c) Sebastian Bergmann <sebastian@phpunit.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace SebastianBergmann\Complexity;
use PhpParser\Error;
use PhpParser\Lexer;
use PhpParser\Node;
use PhpParser\NodeTraverser;
use PhpParser\NodeVisitor\NameResolver;
use PhpParser\NodeVisitor\ParentConnectingVisitor;
use PhpParser\Parser;
use PhpParser\ParserFactory;
final class Calculator
{
/**
* @throws RuntimeException
*/
public function calculateForSourceFile(string $sourceFile): ComplexityCollection
{
return $this->calculateForSourceString(file_get_contents($sourceFile));
}
/**
* @throws RuntimeException
*/
public function calculateForSourceString(string $source): ComplexityCollection
{
try {
$nodes = $this->parser()->parse($source);
assert($nodes !== null);
return $this->calculateForAbstractSyntaxTree($nodes);
// @codeCoverageIgnoreStart
} catch (Error $error) {
throw new RuntimeException(
$error->getMessage(),
(int) $error->getCode(),
$error
);
}
// @codeCoverageIgnoreEnd
}
/**
* @param Node[] $nodes
*
* @throws RuntimeException
*/
public function calculateForAbstractSyntaxTree(array $nodes): ComplexityCollection
{
$traverser = new NodeTraverser;
$complexityCalculatingVisitor = new ComplexityCalculatingVisitor(true);
$traverser->addVisitor(new NameResolver);
$traverser->addVisitor(new ParentConnectingVisitor);
$traverser->addVisitor($complexityCalculatingVisitor);
try {
/* @noinspection UnusedFunctionResultInspection */
$traverser->traverse($nodes);
// @codeCoverageIgnoreStart
} catch (Error $error) {
throw new RuntimeException(
$error->getMessage(),
(int) $error->getCode(),
$error
);
}
// @codeCoverageIgnoreEnd
return $complexityCalculatingVisitor->result();
}
private function parser(): Parser
{
return (new ParserFactory)->create(ParserFactory::PREFER_PHP7, new Lexer);
}
}
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