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<?php |
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declare(strict_types=1); |
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namespace Borodulin\Container\Autowire; |
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use Borodulin\Container\ContainerException; |
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class ClassNameExtractor |
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{ |
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public function extract($filename): ?string |
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{ |
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$tokens = token_get_all(file_get_contents($filename)); |
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$namespace = ''; |
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$token = current($tokens); |
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while (false !== $token) { |
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if ($this->isToken($token, T_NAMESPACE)) { |
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$namespace = $this->extractNamespace($tokens); |
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} |
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if ($this->isToken($token, T_CLASS)) { |
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$className = $this->extractClassName($tokens); |
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return $namespace ? "$namespace\\$className" : $className; |
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} |
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$token = next($tokens); |
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} |
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return null; |
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} |
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private function isToken($token, int $tokenType): bool |
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{ |
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return \is_array($token) && $token[0] === $tokenType; |
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} |
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private function nextToken(array &$tokens, int $tokenType): string |
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{ |
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$token = next($tokens); |
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if (($token[0] ?? null) === $tokenType) { |
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return $token[1]; |
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} |
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throw new ContainerException('Parse error. Expected '.token_name($tokenType)); |
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} |
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private function isNextToken(array &$tokens, int $tokenType): bool |
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{ |
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$token = next($tokens); |
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return $this->isToken($token, $tokenType); |
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} |
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private function extractNamespace(array &$tokens): string |
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{ |
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$this->nextToken($tokens, T_WHITESPACE); |
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$namespace = $this->nextToken($tokens, T_STRING); |
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while ($this->isNextToken($tokens, T_NS_SEPARATOR)) { |
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$namespace .= '\\'.$this->nextToken($tokens, T_STRING); |
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} |
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return $namespace; |
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} |
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private function extractClassName(array &$tokens): string |
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{ |
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$this->nextToken($tokens, T_WHITESPACE); |
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return $this->nextToken($tokens, T_STRING); |
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} |
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} |
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borodulin /
FastContainer
