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