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<?php |
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declare(strict_types=1); |
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namespace Remorhaz\Lexer\Runtime\Token; |
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use function array_shift; |
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use function array_unshift; |
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use function count; |
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use function is_string; |
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final class MatcherSelector implements MatcherSelectorInterface |
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{ |
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/** |
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* @var MatcherInterface[] |
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* @psalm-var array<string,MatcherInterface> |
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*/ |
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private $matchers = []; |
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/** |
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* @var string[] |
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* @psalm-var array<int,string> |
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*/ |
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private $matcherKeys = []; |
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/** |
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* @param MatcherInterface[] $matchers |
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* @psalm-param array<array-key, MatcherInterface> $matchers |
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* @param string|null $startMatcherKey |
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*/ |
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public function __construct(array $matchers, ?string $startMatcherKey = null) |
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{ |
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if (empty($matchers)) { |
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throw new Exception\MatchersNotFoundException(); |
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} |
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foreach ($matchers as $matcherKey => $matcher) { |
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if (!is_string($matcherKey)) { |
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throw new Exception\InvalidMatcherKeyException($startMatcherKey); |
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} |
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$this->matchers[$matcherKey] = $matcher; |
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if (!isset($startMatcherKey)) { |
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$startMatcherKey = $matcherKey; |
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} |
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} |
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$this->setMatcher($startMatcherKey); |
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} |
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/** |
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* @param string $matcherKey |
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* @return MatcherInterface |
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* @psalm-pure |
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*/ |
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private function getMatcherByKey(string $matcherKey): MatcherInterface |
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{ |
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if (isset($this->matchers[$matcherKey])) { |
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return $this->matchers[$matcherKey]; |
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} |
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// @codeCoverageIgnoreStart |
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throw new Exception\MatcherNotFoundException($matcherKey); |
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// @codeCoverageIgnoreEnd |
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} |
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/** |
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* {@inheritDoc} |
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* |
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* @return MatcherInterface |
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* @psalm-pure |
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*/ |
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public function getMatcher(): MatcherInterface |
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{ |
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if (isset($this->matcherKeys[0])) { |
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return $this->getMatcherByKey($this->matcherKeys[0]); |
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} |
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// @codeCoverageIgnoreStart |
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throw new Exception\MatcherKeyNotFoundException(); |
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// @codeCoverageIgnoreEnd |
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} |
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/** |
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* {@inheritDoc} |
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* |
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* @param string $matcherKey |
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*/ |
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public function setMatcher(string $matcherKey): void |
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{ |
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if (!isset($this->matchers[$matcherKey])) { |
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throw new Exception\MatcherNotFoundException($matcherKey); |
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} |
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array_unshift($this->matcherKeys, $matcherKey); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function restoreMatcher(): void |
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{ |
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if (count($this->matcherKeys) == 1) { |
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throw new Exception\MatcherNotRestoredException(); |
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} |
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array_shift($this->matcherKeys); |
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} |
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} |
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remorhaz /
php-lexer-runtime
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