<?php
namespace MailPoetVendor\Symfony\Component\CssSelector\Parser;
if (!defined('ABSPATH')) exit;
use MailPoetVendor\Symfony\Component\CssSelector\Exception\SyntaxErrorException;
use MailPoetVendor\Symfony\Component\CssSelector\Node;
use MailPoetVendor\Symfony\Component\CssSelector\Parser\Tokenizer\Tokenizer;
class Parser implements ParserInterface
{
 private $tokenizer;
 public function __construct(?Tokenizer $tokenizer = null)
 {
 $this->tokenizer = $tokenizer ?? new Tokenizer();
 }
 public function parse(string $source) : array
 {
 $reader = new Reader($source);
 $stream = $this->tokenizer->tokenize($reader);
 return $this->parseSelectorList($stream);
 }
 public static function parseSeries(array $tokens) : array
 {
 foreach ($tokens as $token) {
 if ($token->isString()) {
 throw SyntaxErrorException::stringAsFunctionArgument();
 }
 }
 $joined = \trim(\implode('', \array_map(function (Token $token) {
 return $token->getValue();
 }, $tokens)));
 $int = function ($string) {
 if (!\is_numeric($string)) {
 throw SyntaxErrorException::stringAsFunctionArgument();
 }
 return (int) $string;
 };
 switch (\true) {
 case 'odd' === $joined:
 return [2, 1];
 case 'even' === $joined:
 return [2, 0];
 case 'n' === $joined:
 return [1, 0];
 case !\str_contains($joined, 'n'):
 return [0, $int($joined)];
 }
 $split = \explode('n', $joined);
 $first = $split[0] ?? null;
 return [$first ? '-' === $first || '+' === $first ? $int($first . '1') : $int($first) : 1, isset($split[1]) && $split[1] ? $int($split[1]) : 0];
 }
 private function parseSelectorList(TokenStream $stream) : array
 {
 $stream->skipWhitespace();
 $selectors = [];
 while (\true) {
 $selectors[] = $this->parserSelectorNode($stream);
 if ($stream->getPeek()->isDelimiter([','])) {
 $stream->getNext();
 $stream->skipWhitespace();
 } else {
 break;
 }
 }
 return $selectors;
 }
 private function parserSelectorNode(TokenStream $stream) : Node\SelectorNode
 {
 [$result, $pseudoElement] = $this->parseSimpleSelector($stream);
 while (\true) {
 $stream->skipWhitespace();
 $peek = $stream->getPeek();
 if ($peek->isFileEnd() || $peek->isDelimiter([','])) {
 break;
 }
 if (null !== $pseudoElement) {
 throw SyntaxErrorException::pseudoElementFound($pseudoElement, 'not at the end of a selector');
 }
 if ($peek->isDelimiter(['+', '>', '~'])) {
 $combinator = $stream->getNext()->getValue();
 $stream->skipWhitespace();
 } else {
 $combinator = ' ';
 }
 [$nextSelector, $pseudoElement] = $this->parseSimpleSelector($stream);
 $result = new Node\CombinedSelectorNode($result, $combinator, $nextSelector);
 }
 return new Node\SelectorNode($result, $pseudoElement);
 }
 private function parseSimpleSelector(TokenStream $stream, bool $insideNegation = \false) : array
 {
 $stream->skipWhitespace();
 $selectorStart = \count($stream->getUsed());
 $result = $this->parseElementNode($stream);
 $pseudoElement = null;
 while (\true) {
 $peek = $stream->getPeek();
 if ($peek->isWhitespace() || $peek->isFileEnd() || $peek->isDelimiter([',', '+', '>', '~']) || $insideNegation && $peek->isDelimiter([')'])) {
 break;
 }
 if (null !== $pseudoElement) {
 throw SyntaxErrorException::pseudoElementFound($pseudoElement, 'not at the end of a selector');
 }
 if ($peek->isHash()) {
 $result = new Node\HashNode($result, $stream->getNext()->getValue());
 } elseif ($peek->isDelimiter(['.'])) {
 $stream->getNext();
 $result = new Node\ClassNode($result, $stream->getNextIdentifier());
 } elseif ($peek->isDelimiter(['['])) {
 $stream->getNext();
 $result = $this->parseAttributeNode($result, $stream);
 } elseif ($peek->isDelimiter([':'])) {
 $stream->getNext();
 if ($stream->getPeek()->isDelimiter([':'])) {
 $stream->getNext();
 $pseudoElement = $stream->getNextIdentifier();
 continue;
 }
 $identifier = $stream->getNextIdentifier();
 if (\in_array(\strtolower($identifier), ['first-line', 'first-letter', 'before', 'after'])) {
 // Special case: CSS 2.1 pseudo-elements can have a single ':'.
 // Any new pseudo-element must have two.
 $pseudoElement = $identifier;
 continue;
 }
 if (!$stream->getPeek()->isDelimiter(['('])) {
 $result = new Node\PseudoNode($result, $identifier);
 continue;
 }
 $stream->getNext();
 $stream->skipWhitespace();
 if ('not' === \strtolower($identifier)) {
 if ($insideNegation) {
 throw SyntaxErrorException::nestedNot();
 }
 [$argument, $argumentPseudoElement] = $this->parseSimpleSelector($stream, \true);
 $next = $stream->getNext();
 if (null !== $argumentPseudoElement) {
 throw SyntaxErrorException::pseudoElementFound($argumentPseudoElement, 'inside ::not()');
 }
 if (!$next->isDelimiter([')'])) {
 throw SyntaxErrorException::unexpectedToken('")"', $next);
 }
 $result = new Node\NegationNode($result, $argument);
 } else {
 $arguments = [];
 $next = null;
 while (\true) {
 $stream->skipWhitespace();
 $next = $stream->getNext();
 if ($next->isIdentifier() || $next->isString() || $next->isNumber() || $next->isDelimiter(['+', '-'])) {
 $arguments[] = $next;
 } elseif ($next->isDelimiter([')'])) {
 break;
 } else {
 throw SyntaxErrorException::unexpectedToken('an argument', $next);
 }
 }
 if (empty($arguments)) {
 throw SyntaxErrorException::unexpectedToken('at least one argument', $next);
 }
 $result = new Node\FunctionNode($result, $identifier, $arguments);
 }
 } else {
 throw SyntaxErrorException::unexpectedToken('selector', $peek);
 }
 }
 if (\count($stream->getUsed()) === $selectorStart) {
 throw SyntaxErrorException::unexpectedToken('selector', $stream->getPeek());
 }
 return [$result, $pseudoElement];
 }
 private function parseElementNode(TokenStream $stream) : Node\ElementNode
 {
 $peek = $stream->getPeek();
 if ($peek->isIdentifier() || $peek->isDelimiter(['*'])) {
 if ($peek->isIdentifier()) {
 $namespace = $stream->getNext()->getValue();
 } else {
 $stream->getNext();
 $namespace = null;
 }
 if ($stream->getPeek()->isDelimiter(['|'])) {
 $stream->getNext();
 $element = $stream->getNextIdentifierOrStar();
 } else {
 $element = $namespace;
 $namespace = null;
 }
 } else {
 $element = $namespace = null;
 }
 return new Node\ElementNode($namespace, $element);
 }
 private function parseAttributeNode(Node\NodeInterface $selector, TokenStream $stream) : Node\AttributeNode
 {
 $stream->skipWhitespace();
 $attribute = $stream->getNextIdentifierOrStar();
 if (null === $attribute && !$stream->getPeek()->isDelimiter(['|'])) {
 throw SyntaxErrorException::unexpectedToken('"|"', $stream->getPeek());
 }
 if ($stream->getPeek()->isDelimiter(['|'])) {
 $stream->getNext();
 if ($stream->getPeek()->isDelimiter(['='])) {
 $namespace = null;
 $stream->getNext();
 $operator = '|=';
 } else {
 $namespace = $attribute;
 $attribute = $stream->getNextIdentifier();
 $operator = null;
 }
 } else {
 $namespace = $operator = null;
 }
 if (null === $operator) {
 $stream->skipWhitespace();
 $next = $stream->getNext();
 if ($next->isDelimiter([']'])) {
 return new Node\AttributeNode($selector, $namespace, $attribute, 'exists', null);
 } elseif ($next->isDelimiter(['='])) {
 $operator = '=';
 } elseif ($next->isDelimiter(['^', '$', '*', '~', '|', '!']) && $stream->getPeek()->isDelimiter(['='])) {
 $operator = $next->getValue() . '=';
 $stream->getNext();
 } else {
 throw SyntaxErrorException::unexpectedToken('operator', $next);
 }
 }
 $stream->skipWhitespace();
 $value = $stream->getNext();
 if ($value->isNumber()) {
 // if the value is a number, it's casted into a string
 $value = new Token(Token::TYPE_STRING, (string) $value->getValue(), $value->getPosition());
 }
 if (!($value->isIdentifier() || $value->isString())) {
 throw SyntaxErrorException::unexpectedToken('string or identifier', $value);
 }
 $stream->skipWhitespace();
 $next = $stream->getNext();
 if (!$next->isDelimiter([']'])) {
 throw SyntaxErrorException::unexpectedToken('"]"', $next);
 }
 return new Node\AttributeNode($selector, $namespace, $attribute, $operator, $value->getValue());
 }
}