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<?php |
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declare(strict_types=1); |
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namespace Remorhaz\JSON\Data\Export; |
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use Iterator; |
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use Remorhaz\JSON\Data\Event\AfterArrayEventInterface; |
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use Remorhaz\JSON\Data\Event\AfterElementEventInterface; |
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use Remorhaz\JSON\Data\Event\AfterObjectEventInterface; |
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use Remorhaz\JSON\Data\Event\AfterPropertyEventInterface; |
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use Remorhaz\JSON\Data\Event\BeforeArrayEventInterface; |
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use Remorhaz\JSON\Data\Event\BeforeElementEventInterface; |
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use Remorhaz\JSON\Data\Event\BeforeObjectEventInterface; |
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use Remorhaz\JSON\Data\Event\BeforePropertyEventInterface; |
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use Remorhaz\JSON\Data\Event\EventInterface; |
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use Remorhaz\JSON\Data\Event\ScalarEventInterface; |
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use Remorhaz\JSON\Data\Value\DecodedJson\NodeValueFactory; |
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use Remorhaz\JSON\Data\Value\NodeValueInterface; |
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final class EventDecoder implements EventDecoderInterface |
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{ |
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/** |
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* @param Iterator|EventInterface[] $events |
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* @return NodeValueInterface|null |
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*/ |
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public function exportEvents(Iterator $events): ?NodeValueInterface |
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{ |
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$buffer = []; |
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$structures = []; |
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$structure = null; |
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foreach ($events as $event) { |
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switch (true) { |
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case $event instanceof ScalarEventInterface: |
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$buffer[] = $event->getData(); |
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break; |
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case $event instanceof BeforeArrayEventInterface: |
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case $event instanceof BeforeObjectEventInterface: |
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$structures[] = $structure; |
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$structure = []; |
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break; |
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case $event instanceof BeforeElementEventInterface: |
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case $event instanceof BeforePropertyEventInterface: |
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break; |
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case $event instanceof AfterElementEventInterface: |
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$structure[$event->getIndex()] = array_pop($buffer); |
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break; |
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case $event instanceof AfterPropertyEventInterface: |
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$structure[$event->getName()] = array_pop($buffer); |
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break; |
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case $event instanceof AfterArrayEventInterface: |
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$buffer[] = $structure; |
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$structure = array_pop($structures); |
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break; |
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case $event instanceof AfterObjectEventInterface: |
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$buffer[] = (object) $structure; |
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$structure = array_pop($structures); |
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break; |
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default: |
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throw new Exception\UnknownEventException($event); |
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} |
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} |
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if (empty($buffer)) { |
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return null; |
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} |
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$data = array_pop($buffer); |
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return (new NodeValueFactory)->createValue($data); |
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} |
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public function exportExistingEvents(Iterator $events): NodeValueInterface |
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{ |
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$value = $this->exportEvents($events); |
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if (isset($value)) { |
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return $value; |
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} |
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throw new Exception\NoValueToExportException; |
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} |
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} |
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remorhaz /
php-json-data
