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<?php |
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namespace Vanderlee\Comprehend\Core; |
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use DOMDocument; |
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use DOMElement; |
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use DOMException; |
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use Exception; |
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use JsonSerializable; |
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/** |
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* Class Token. |
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* |
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* |
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* @property-read Token[] $children |
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* @property-read string $class |
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* @property-read string $group |
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* @property-read string $input |
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* @property-read int $length |
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* @property-read int $offset |
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* @property-read string $name |
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* @property-read string $text |
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*/ |
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class Token implements JsonSerializable |
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{ |
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private $group; |
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private $name; |
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private $input; |
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private $offset; |
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private $length; |
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private $class; |
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/** |
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* @var Token[] |
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*/ |
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private $children; |
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public function __construct($group, $name, $input, int $offset, $length, $children = [], $class = null) |
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{ |
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$this->group = $group; |
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$this->name = $name; |
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$this->input = $input; |
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$this->offset = &$offset; |
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$this->length = $length; |
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$this->children = $children; |
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$this->class = $class; |
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} |
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/** |
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* @throws Exception |
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*/ |
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public function __get($name) |
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{ |
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switch ($name) { |
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case 'text': |
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return substr($this->input, $this->offset, $this->length); |
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default: |
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if (property_exists($this, $name)) { |
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return $this->$name; |
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} |
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} |
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throw new Exception('Undefined property `' . $name . '`'); |
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} |
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private function toString($depth = 0) |
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{ |
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$signature = ($this->group |
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? $this->group . '::' |
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: '') |
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. ($this->name |
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?: $this->class); |
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$output = str_repeat(' ', $depth) . $signature . ' (`' . $this->text . '`)'; |
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foreach ($this->children as $child) { |
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$output .= PHP_EOL . $child->toString($depth + 1); |
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} |
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return $output; |
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} |
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public function __toString() |
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{ |
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return $this->toString(); |
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} |
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/** |
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* @return DOMDocument |
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* @throws DOMException |
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*/ |
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public function toXml() |
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{ |
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$document = new DOMDocument(); |
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$document->appendChild($this->createXmlNode($document)); |
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$document->normalizeDocument(); |
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return $document; |
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} |
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/** |
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* Create an XML node of this token. |
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* |
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* @param DOMDocument $document |
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* |
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* @return DOMElement |
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* |
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* @throws DOMException |
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*/ |
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private function createXmlNode(DOMDocument $document) |
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{ |
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$value = $this->children |
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? null |
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: $this->text; |
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$name = preg_replace('/[^-_a-zA-Z0-9]/', '_', $this->name |
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?: $this->class); |
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$group = preg_replace('/[^-_a-zA-Z0-9]/', '_', $this->group); |
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$element = $this->group |
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? $document->createElementNS($this->group, $group . ':' . $name, $value) |
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: $document->createElement($name, $value); |
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foreach ($this->children as $child) { |
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$element->appendChild($child->createXmlNode($document)); |
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} |
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return $element; |
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} |
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/** |
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* Convert object to JSON for json_encode |
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* Implements /JsonSerializable interface. |
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*/ |
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public function jsonSerialize() |
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{ |
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return $this->toArray(); |
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} |
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/** |
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* Output this node as an array. |
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* |
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* @return array |
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*/ |
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public function toArray() |
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{ |
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$array = [ |
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'group' => $this->group, |
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'name' => $this->name, |
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'text' => $this->text, |
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'offset' => $this->offset, |
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'length' => $this->length, |
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'class' => $this->class, |
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'children' => [], |
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]; |
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foreach ($this->children as $child) { |
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$array['children'][] = $child->toArray(); |
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} |
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return $array; |
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} |
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} |
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vanderlee /
Comprehend
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