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<?php |
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namespace Remorhaz\UniLex\RegExp\FSM; |
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use Remorhaz\UniLex\Exception; |
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class RangeSet |
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{ |
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/** |
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* @var Range[] |
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*/ |
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private $rangeList = []; |
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public static function loadUnsafe(Range ...$rangeList): self |
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{ |
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$rangeSet = new self(); |
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$rangeSet->rangeList = $rangeList; |
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return $rangeSet; |
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} |
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/** |
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* RangeSet constructor. |
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* |
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* @param Range ...$rangeList |
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* @throws Exception |
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*/ |
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public function __construct(Range ...$rangeList) |
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{ |
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if (!empty($rangeList)) { |
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$this->addRange(...$rangeList); |
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} |
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} |
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/** |
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* @param array ...$rangeDataList |
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* @return RangeSet |
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* @throws Exception |
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*/ |
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public static function import(array ...$rangeDataList): self |
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{ |
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return new self(...Range::importList(...$rangeDataList)); |
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} |
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public function export(): array |
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{ |
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$rangeDataList = []; |
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foreach ($this->getRanges() as $range) { |
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$rangeDataList[] = $range->export(); |
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} |
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return $rangeDataList; |
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} |
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/** |
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* @param Range ...$rangeList |
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* @throws Exception |
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*/ |
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public function addRange(Range ...$rangeList): void |
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{ |
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$rangeList = $this->getSortedRangeList(...$rangeList); |
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$existingIndex = 0; |
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$addedIndex = 0; |
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$newRangeList = []; |
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/** @var Range $rangeBuffer */ |
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$rangeBuffer = null; |
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while (true) { |
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$existingRange = $this->rangeList[$existingIndex] ?? null; |
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$addedRange = $rangeList[$addedIndex] ?? null; |
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if (isset($existingRange)) { |
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if (isset($addedRange) && $existingRange->getStart() > $addedRange->getStart()) { |
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$pickedRange = $addedRange; |
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$addedIndex++; |
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} else { |
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$pickedRange = $existingRange; |
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$existingIndex++; |
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} |
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} elseif (isset($addedRange)) { |
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$pickedRange = $addedRange; |
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$addedIndex++; |
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} else { |
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if (isset($rangeBuffer)) { |
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$newRangeList[] = $rangeBuffer; |
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} |
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break; |
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} |
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if (isset($rangeBuffer)) { |
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if ($rangeBuffer->containsFinishOf($pickedRange)) { |
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continue; |
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} |
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if ($rangeBuffer->containsStartOf($pickedRange) || $pickedRange->follows($rangeBuffer)) { |
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$rangeBuffer = $pickedRange->copyAfterStartOf($rangeBuffer); |
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continue; |
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} |
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$newRangeList[] = $rangeBuffer; |
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} |
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$rangeBuffer = $pickedRange; |
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} |
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$this->rangeList = $newRangeList; |
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} |
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/** |
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* @return Range[] |
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*/ |
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public function getRanges(): array |
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{ |
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return $this->rangeList; |
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} |
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public function isEmpty(): bool |
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{ |
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return empty($this->rangeList); |
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} |
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private function getSortedRangeList(Range ...$rangeList): array |
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{ |
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if (isset($rangeList[1])) { |
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$sortByFrom = function (Range $rangeOne, Range $rangeTwo): int { |
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return $rangeOne->getStart() <=> $rangeTwo->getStart(); |
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}; |
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usort($rangeList, $sortByFrom); |
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} |
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return $rangeList; |
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} |
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} |
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remorhaz /
php-unilex
