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<?php declare(strict_types=1);
/*
* This file is part of sebastian/lines-of-code.
*
* (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\LinesOfCode;
use function substr_count;
use PhpParser\Error;
use PhpParser\Lexer;
use PhpParser\Node;
use PhpParser\NodeTraverser;
use PhpParser\Parser;
use PhpParser\ParserFactory;
final class Counter
{
/**
* @throws RuntimeException
*/
public function countInSourceFile(string $sourceFile): LinesOfCode
{
return $this->countInSourceString(file_get_contents($sourceFile));
}
/**
* @throws RuntimeException
*/
public function countInSourceString(string $source): LinesOfCode
{
$linesOfCode = substr_count($source, "\n");
if ($linesOfCode === 0 && !empty($source)) {
$linesOfCode = 1;
}
try {
$nodes = $this->parser()->parse($source);
assert($nodes !== null);
return $this->countInAbstractSyntaxTree($linesOfCode, $nodes);
// @codeCoverageIgnoreStart
} catch (Error $error) {
throw new RuntimeException(
$error->getMessage(),
(int) $error->getCode(),
$error
);
}
// @codeCoverageIgnoreEnd
}
/**
* @param Node[] $nodes
*
* @throws RuntimeException
*/
public function countInAbstractSyntaxTree(int $linesOfCode, array $nodes): LinesOfCode
{
$traverser = new NodeTraverser;
$visitor = new LineCountingVisitor($linesOfCode);
$traverser->addVisitor($visitor);
try {
/* @noinspection UnusedFunctionResultInspection */
$traverser->traverse($nodes);
// @codeCoverageIgnoreStart
} catch (Error $error) {
throw new RuntimeException(
$error->getMessage(),
(int) $error->getCode(),
$error
);
}
// @codeCoverageIgnoreEnd
return $visitor->result();
}
private function parser(): Parser
{
return (new ParserFactory)->create(ParserFactory::PREFER_PHP7, new Lexer);
}
}