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<?php |
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declare(strict_types=1); |
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/** |
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* @license http://opensource.org/licenses/mit-license.php MIT |
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* @link https://github.com/nicoSWD |
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* @author Nicolas Oelgart <[email protected]> |
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*/ |
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namespace nicoSWD\Rule\TokenStream\Node; |
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use Closure; |
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use nicoSWD\Rule\TokenStream\TokenCollection; |
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use nicoSWD\Rule\Parser\Exception\ParserException; |
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use nicoSWD\Rule\Grammar\CallableFunction; |
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use nicoSWD\Rule\TokenStream\TokenStream; |
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use nicoSWD\Rule\TokenStream\Token\TokenType; |
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use nicoSWD\Rule\TokenStream\Token; |
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abstract class BaseNode |
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{ |
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/** @var TokenStream */ |
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protected $tokenStream; |
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/** @var string */ |
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protected $methodName = ''; |
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/** @var int */ |
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protected $methodOffset = 0; |
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public function __construct(TokenStream $tokenStream) |
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{ |
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$this->tokenStream = $tokenStream; |
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} |
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abstract public function getNode(): Token\BaseToken; |
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protected function hasMethodCall(): bool |
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{ |
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$stack = $this->tokenStream->getStack(); |
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$position = $stack->key(); |
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$hasMethod = false; |
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while ($stack->valid()) { |
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$stack->next(); |
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/** @var Token\BaseToken $token */ |
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if (!$token = $stack->current()) { |
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break; |
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} elseif ($token->isWhitespace()) { |
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continue; |
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} elseif ($token->isMethod()) { |
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$this->methodName = $token->getValue(); |
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$this->methodOffset = $token->getOffset(); |
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$hasMethod = true; |
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} else { |
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break; |
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} |
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} |
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$stack->seek($position); |
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return $hasMethod; |
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} |
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public function getMethod(Token\BaseToken $token): CallableFunction |
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{ |
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return $this->tokenStream->getMethod($this->getMethodName(), $token); |
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} |
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private function getMethodName(): string |
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{ |
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do { |
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$this->tokenStream->next(); |
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} while ($this->getCurrentNode()->getOffset() < $this->methodOffset); |
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return trim(ltrim(rtrim($this->methodName, "\r\n("), '.')); |
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} |
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public function getFunction(): Closure |
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{ |
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return $this->tokenStream->getFunction($this->getFunctionName()); |
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} |
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private function getFunctionName(): string |
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{ |
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return rtrim($this->getCurrentNode()->getValue(), " \r\n("); |
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} |
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public function getArrayItems(): TokenCollection |
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{ |
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return $this->getCommaSeparatedValues(TokenType::SQUARE_BRACKET); |
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} |
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public function getArguments(): TokenCollection |
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{ |
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return $this->getCommaSeparatedValues(TokenType::PARENTHESIS); |
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} |
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public function getCurrentNode() |
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{ |
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return $this->tokenStream->getStack()->current(); |
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} |
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private function getCommaSeparatedValues(int $stopAt): TokenCollection |
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{ |
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$items = new TokenCollection(); |
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$commaExpected = false; |
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do { |
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$token = $this->getNextToken(); |
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if ($token->isValue()) { |
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if ($commaExpected) { |
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throw ParserException::unexpectedToken($token); |
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} |
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$commaExpected = true; |
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$items->attach($token); |
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} elseif ($token->isComma()) { |
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if (!$commaExpected) { |
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throw ParserException::unexpectedComma($token); |
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} |
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$commaExpected = false; |
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} elseif ($token->getType() === $stopAt) { |
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break; |
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} elseif (!$token->isWhitespace()) { |
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throw ParserException::unexpectedToken($token); |
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} |
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} while (true); |
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$this->assertNoTrailingComma($commaExpected, $items, $token); |
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$items->rewind(); |
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return $items; |
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} |
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private function getNextToken(): Token\BaseToken |
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{ |
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$this->tokenStream->next(); |
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if (!$this->tokenStream->valid()) { |
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throw new ParserException('Unexpected end of string'); |
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} |
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return $this->tokenStream->current(); |
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} |
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private function assertNoTrailingComma(bool $commaExpected, TokenCollection $items, Token\BaseToken $token) |
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{ |
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if (!$commaExpected && $items->count() > 0) { |
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throw ParserException::unexpectedComma($token); |
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} |
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} |
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} |
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nicoSWD /
php-rule-parser
