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<?php |
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declare(strict_types=1); |
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namespace JsonDecodeStream\Collector; |
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use JsonDecodeStream\Event; |
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use JsonDecodeStream\Exception\CollectorException; |
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use JsonDecodeStream\Exception\SelectorException; |
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use stdClass; |
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class Collector implements CollectorInterface |
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{ |
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/** @var string */ |
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protected $selector; |
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/** @var bool */ |
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protected $objectsAsAssocArrays; |
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/** @var null|array|stdClass */ |
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protected $current = null; |
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/** @var array|array[]|stdClass[] */ |
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protected $stack = []; |
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/** @var null|string */ |
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protected $key = null; |
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/** @var string[]|null[] */ |
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protected $keyStack = []; |
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public function __construct(string $selector = null, bool $objectsAsAssocArrays = false) |
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{ |
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$this->selector = $selector; |
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$this->objectsAsAssocArrays = $objectsAsAssocArrays; |
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} |
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/** |
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* @param Event $event |
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* @return array|null |
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* @throws CollectorException |
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* @throws SelectorException |
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*/ |
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public function processEvent(Event $event) |
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{ |
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if ($this->selector !== null && !$event->matchPath($this->selector)) { |
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return null; |
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} |
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switch ($event->getId()) { |
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case Event::KEY: |
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$this->key = $event->getValue(); |
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break; |
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case Event::VALUE: |
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if ($this->current === null) { |
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return [ $event->getPath(), $event->getValue() ]; |
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} elseif ($this->key !== null && $this->hasKeyInCurrent($this->key)) { |
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throw CollectorException::duplicatedKey($this->key, $event); |
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} else { |
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$this->setInCurrent($event->getValue(), $this->key); |
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} |
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break; |
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case Event::OBJECT_START: |
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case Event::ARRAY_START: |
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if ($this->current !== null) { |
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$this->stack[] = $this->current; |
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$this->keyStack[] = $this->key; |
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} |
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if ($event->getId() == Event::OBJECT_START) { |
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$this->current = $this->objectsAsAssocArrays ? [] : new stdClass(); |
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} elseif ($event->getId() == Event::ARRAY_START) { |
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$this->current = []; |
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} |
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$this->key = null; |
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break; |
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case Event::OBJECT_END: |
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case Event::ARRAY_END: |
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$finished = $this->current; |
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if (!empty($this->stack)) { |
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$this->current = array_pop($this->stack); |
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$this->key = array_pop($this->keyStack); |
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if ($this->key !== null && $this->hasKeyInCurrent($this->key)) { |
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throw CollectorException::duplicatedKey($this->key, $event); |
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} |
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$this->setInCurrent($finished, $this->key); |
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} else { |
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$this->current = null; |
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$this->key = null; |
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return [ $event->getPath(), $finished ]; |
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} |
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break; |
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} |
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return null; |
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} |
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protected function hasKeyInCurrent($key) |
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{ |
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if ($key === null) { |
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return false; |
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} |
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if (is_object($this->current)) { |
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return isset($this->current->{$key}); |
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} elseif (is_array($this->current)) { |
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return isset($this->current[$key]); |
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} else { |
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return false; |
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} |
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} |
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protected function setInCurrent($value, $key = null) |
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{ |
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if (is_object($this->current)) { |
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$this->current->{$key} = $value; |
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} elseif (is_array($this->current) && $key === null) { |
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$this->current[] = $value; |
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} elseif (is_array($this->current)) { |
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$this->current[$key] = $value; |
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} |
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} |
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} |
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klkvsk /
json-decode-stream
