Borodulin\Finder\ClassExtractor

Complexity

Total Complexity

16

Size/Duplication

Total Lines	74
Duplicated Lines	0 %

Test Coverage

Coverage

100%

Importance

Changes	1
Bugs	0	Features	0

7 Methods

Rating	Name	Duplication	Size	Complexity
A	isToken()	0	3	2
B	__invoke()	0	23	7
A	isNextToken()	0	5	1
A	nextToken()	0	7	2
A	__construct()	0	3	1
A	extractNamespace()	0	9	2
A	extractClassName()	0	5	1

<?php

declare(strict_types=1);

namespace Borodulin\Finder;

use Borodulin\Finder\Exception\ParseException;

class ClassExtractor
{
    /**
     * @var bool
     */
    private $skipAbstract;

    public function __construct(bool $skipAbstract = true)
    {
        $this->skipAbstract = $skipAbstract;
    }

    public function __invoke($filename): ?string
    {
        $tokens = token_get_all(file_get_contents($filename));

        $namespace = '';

        $token = current($tokens);
        while (false !== $token) {
            if ($this->skipAbstract && $this->isToken($token, T_ABSTRACT)) {
                return null;
            }
            if ($this->isToken($token, T_NAMESPACE)) {
                $namespace = $this->extractNamespace($tokens);
            }
            if ($this->isToken($token, T_CLASS)) {
                $className = $this->extractClassName($tokens);

                return $namespace ? "$namespace\\$className" : $className;
            }
            $token = next($tokens);
        }

        return null;
    }

    private function isToken($token, int $tokenType): bool
    {
        return \is_array($token) && $token[0] === $tokenType;
    }

    private function nextToken(array &$tokens, int $tokenType): string
    {
        $token = next($tokens);
        if (($token[0] ?? null) === $tokenType) {
            return $token[1];
        }
        throw new ParseException('Parse error. Expected '.token_name($tokenType));
    }

    private function isNextToken(array &$tokens, int $tokenType): bool
    {
        $token = next($tokens);

        return $this->isToken($token, $tokenType);
    }

    private function extractNamespace(array &$tokens): string
    {
        $this->nextToken($tokens, T_WHITESPACE);
        $namespace = $this->nextToken($tokens, T_STRING);
        while ($this->isNextToken($tokens, T_NS_SEPARATOR)) {
            $namespace .= '\\'.$this->nextToken($tokens, T_STRING);
        }

        return $namespace;
    }

    private function extractClassName(array &$tokens): string
    {
        $this->nextToken($tokens, T_WHITESPACE);

        return $this->nextToken($tokens, T_STRING);
    }
}