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<?php |
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declare(strict_types=1); |
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/** |
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* This file is part of Scout Extended. |
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* |
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* (c) Algolia Team <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Algolia\ScoutExtended\Splitters\HtmlSplitterComponent; |
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final class Queue |
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{ |
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/** |
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* @var array |
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*/ |
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protected $queue = []; |
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protected $cloneQueue = []; |
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/** |
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* The list of html tags. |
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* |
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* @var string[] |
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*/ |
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protected $tags = [ |
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'h1', |
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'h2', |
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'h3', |
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'h4', |
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'h5', |
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'h6', |
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'p', |
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]; |
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/** |
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* String for key check purpose. |
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*/ |
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private const IMPORTANCE = 'importance'; |
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/** |
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* String for exception purpose. |
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*/ |
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private const PARAGRAPH = 'p'; |
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/** |
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* @return array |
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*/ |
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public function getCloneQueue(): array |
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{ |
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return $this->cloneQueue; |
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} |
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/** |
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* Add object to queue. |
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* |
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* @param ObjectQueue $object |
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*/ |
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public function addObjectQueue(ObjectQueue $object): void |
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{ |
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if ($this->lengthQueue() === 0) { |
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$this->queue[] = $object; |
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$this->cloneQueue(); |
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} elseif ($this->findWeight($object) > $this->findWeight(end($this->queue))) { |
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$this->queue[] = $object; |
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$this->cloneQueue(); |
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} else { |
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array_pop($this->queue); |
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$this->addObjectQueue($object); |
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} |
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} |
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/** |
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* Clean Records to have a correct format. |
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* |
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* @return array |
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*/ |
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public function sanitizeQueue(): array |
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{ |
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$records = []; |
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foreach ($this->cloneQueue as $queue) { |
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foreach ($queue as $object) { |
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if ($object instanceof ObjectQueue) { |
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$record[$object->getTag()] = $object->getTagContent(); |
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} else { |
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$record[self::IMPORTANCE] = $object; |
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$records[] = $record; |
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$record = []; |
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} |
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} |
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} |
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return $records; |
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} |
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/** |
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* Importance need to be add after to avoid polluted queue. |
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* |
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* @return void |
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*/ |
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private function cloneQueue(): void |
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{ |
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$this->cloneQueue[] = $this->queue; |
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$this->cloneQueue[] = [self::IMPORTANCE => $this->importanceWeight(end($this->queue))]; |
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} |
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/** |
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* Importance formula. |
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* Give integer from tags ranking. |
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* |
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* @param ObjectQueue $objectQueue |
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* |
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* @return int |
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*/ |
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private function importanceWeight(ObjectQueue $objectQueue): int |
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{ |
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if ($objectQueue->getTag() === self::PARAGRAPH) { |
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$object = prev($this->queue); |
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if (empty(end($this->queue)) || $this->lengthQueue() === 1) { |
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return 0; |
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} |
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return (count($this->tags) - 1) + $this->findWeight($object); |
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} |
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return $this->findWeight($objectQueue); |
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} |
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/** |
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* Find weight of current nodes. |
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* |
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* @param ObjectQueue $object |
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* |
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* @return int |
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*/ |
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private function findWeight(ObjectQueue $object): int |
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{ |
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return (int) array_search($object->getTag(), $this->tags, true); |
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} |
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/** |
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* Give the length of the queue. |
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* |
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* @return int |
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*/ |
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private function lengthQueue(): int |
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{ |
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return count($this->queue); |
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} |
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} |
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algolia /
scout-extended
