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<?php |
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namespace Dallgoot\Yaml; |
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use Dallgoot\Yaml\{Types as T, Regex as R}; |
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use \SplDoublyLinkedList as DLL; |
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class Node |
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{ |
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/** @var int */ |
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public $indent = -1; |
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/** @var int */ |
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public $line; |
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/** @var int */ |
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public $type; |
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/** @var null|string|boolean */ |
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public $identifier; |
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/** @var Node|DLL|null|string */ |
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public $value; |
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/** @var null|Node */ |
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private $parent; |
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public function __construct($nodeString = null, $line = null) |
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{ |
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$this->line = $line; |
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if (is_null($nodeString)) { |
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$this->type = T::ROOT; |
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} else { |
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$this->parse($nodeString); |
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} |
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} |
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public function setParent(Node $node):Node |
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{ |
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$this->parent = $node; |
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return $this; |
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} |
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public function getParent($indent = null):Node |
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{ |
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if (is_null($indent)) return $this->parent ?? $this; |
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$cursor = $this; |
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while ($cursor->indent >= $indent) { |
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$cursor = $cursor->parent; |
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} |
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return $cursor; |
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} |
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public function add(Node $child):void |
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{ |
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$child->setParent($this); |
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$current = $this->value; |
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if (in_array($this->type, T::$LITTERALS)) $child->type = T::SCALAR; |
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if (is_null($current)) { |
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$this->value = $child; |
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return; |
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} elseif ($current instanceof Node) { |
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$this->value = new DLL(); |
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$this->value->setIteratorMode(DLL::IT_MODE_KEEP); |
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$this->value->push($current); |
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} |
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$this->value->push($child); |
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//modify type according to child |
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if ($this->value instanceof DLL && !property_exists($this->value, "type")) { |
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switch ($child->type) { |
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case T::KEY: $this->value->type = T::MAPPING;break; |
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case T::ITEM: $this->value->type = T::SEQUENCE;break; |
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case T::SCALAR: $this->value->type = $this->type;break; |
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} |
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} |
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} |
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public function getDeepestNode():Node |
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{ |
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$cursor = $this; |
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while ($cursor->value instanceof Node) { |
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$cursor = $cursor->value; |
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} |
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return $cursor; |
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} |
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/** |
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* CAUTION : the types assumed here are NOT FINAL : they CAN be adjusted according to parent |
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*/ |
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public function parse(String $nodeString):Node |
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{ |
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$nodeValue = preg_replace("/^\t+/m", " ", $nodeString);//permissive to tabs but replacement |
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$this->indent = strspn($nodeValue, ' '); |
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$nodeValue = ltrim($nodeValue); |
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if ($nodeValue === '') { |
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$this->type = T::EMPTY; |
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// $this->indent = 0; // remove if no bugs |
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} elseif (substr($nodeValue, 0, 3) === '...') {//TODO: can have something on same line ? |
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$this->type = T::DOC_END; |
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} elseif (preg_match(R::KEY, $nodeValue, $matches)) { |
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$this->onKey($matches); |
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} else {//NOTE: can be of another type according to parent |
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list($this->type, $value) = $this->define($nodeValue); |
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is_object($value) ? $this->add($value) : $this->value = $value; |
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} |
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return $this; |
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} |
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/** |
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* Set the type and value according to first character |
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* |
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* @param string $nodeValue The node value |
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* @return array contains [node->type, node->value] |
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*/ |
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private function define($nodeValue):array |
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{ |
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$v = substr($nodeValue, 1); |
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if (in_array($nodeValue[0], ['"', "'"])) { |
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$type = R::isProperlyQuoted($nodeValue) ? T::QUOTED : T::PARTIAL; |
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return [$type, $nodeValue]; |
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} |
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if (in_array($nodeValue[0], ['{', '['])) return $this->onObject($nodeValue); |
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if (in_array($nodeValue[0], ['!', '&', '*'])) return $this->onNodeAction($nodeValue); |
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switch ($nodeValue[0]) { |
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case '#': return [T::COMMENT, ltrim($v)]; |
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case "-": return $this->onHyphen($nodeValue); |
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case '%': return [T::DIRECTIVE, ltrim($v)]; |
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case '?': return [T::SET_KEY, empty($v) ? null : new Node(ltrim($v), $this->line)]; |
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case ':': return [T::SET_VALUE, empty($v) ? null : new Node(ltrim($v), $this->line)]; |
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case '>': return [T::LITTERAL_FOLDED, null]; |
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case '|': return [T::LITTERAL, null]; |
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default: |
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return [T::SCALAR, $nodeValue]; |
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} |
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} |
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private function onKey($matches):void |
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{ |
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$this->type = T::KEY; |
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$this->identifier = trim($matches[1]); |
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$keyValue = isset($matches[2]) ? trim($matches[2]) : null; |
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if (!empty($keyValue)) { |
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$n = new Node($keyValue, $this->line); |
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$hasComment = strpos($keyValue, ' #'); |
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if (!is_bool($hasComment)) { |
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$tmpNode = new Node(trim(substr($keyValue, 0, $hasComment)), $this->line); |
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if ($tmpNode->type !== T::PARTIAL) { |
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$comment = new Node(trim(substr($keyValue, $hasComment+1)), $this->line); |
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//TODO: modify "identifier" to specify if fullline comment or not |
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$this->add($comment); |
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$n = $tmpNode; |
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} |
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} |
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$n->indent = $this->indent + strlen($this->identifier); |
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$this->add($n); |
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} |
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} |
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private function onObject($value):array |
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{ |
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json_decode($value, false, 512, JSON_PARTIAL_OUTPUT_ON_ERROR|JSON_UNESCAPED_SLASHES); |
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if (json_last_error() === JSON_ERROR_NONE) return [T::JSON, $value]; |
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if (preg_match(R::MAPPING, $value)) return [T::MAPPING_SHORT, $value]; |
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if (preg_match(R::SEQUENCE, $value)) return [T::SEQUENCE_SHORT, $value]; |
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return [T::PARTIAL, $value]; |
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} |
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private function onHyphen($nodeValue):array |
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{ |
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if (substr($nodeValue, 0, 3) === '---') { |
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$rest = trim(substr($nodeValue, 3)); |
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if (empty($rest)) return [T::DOC_START, null]; |
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$n = new Node($rest, $this->line); |
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$n->indent = $this->indent + 4; |
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return [T::DOC_START, $n->setParent($this)]; |
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} |
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if (preg_match(R::ITEM, $nodeValue, $matches)) { |
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if (isset($matches[1]) && !empty(trim($matches[1]))) { |
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$n = new Node(trim($matches[1]), $this->line); |
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return [T::ITEM, $n->setParent($this)]; |
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} |
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return [T::ITEM, null]; |
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} |
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return [T::SCALAR, $nodeValue]; |
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} |
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private function onNodeAction($nodeValue):array |
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{ |
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// TODO: handle tags like <tag:clarkevans.com,2002:invoice> |
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$v = substr($nodeValue, 1); |
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$type = ['!' => T::TAG, '&' => T::REF_DEF, '*' => T::REF_CALL][$nodeValue[0]]; |
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$pos = strpos($v, ' '); |
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$this->identifier = is_bool($pos) ? $v : strstr($v, ' ', true); |
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$n = is_bool($pos) ? null : (new Node(trim(substr($nodeValue, $pos+1)), $this->line))->setParent($this); |
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return [$type, $n]; |
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} |
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public function getPhpValue() |
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{ |
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$v = $this->value; |
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if (is_null($v)) return null; |
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switch ($this->type) { |
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case T::JSON: return json_decode($v, false, 512, JSON_PARTIAL_OUTPUT_ON_ERROR); |
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case T::QUOTED: return substr($v, 1, -1); |
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case T::RAW: return strval($v); |
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case T::REF_CALL://fall through |
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case T::SCALAR: return self::getScalar($v); |
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case T::MAPPING_SHORT: return self::getShortMapping(substr($v, 1, -1)); |
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//TODO : that's not robust enough, improve it |
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case T::SEQUENCE_SHORT: |
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$f = function ($e) { return self::getScalar(trim($e));}; |
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return array_map($f, explode(",", substr($v, 1, -1))); |
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default: |
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trigger_error("Error can not get PHP type for ".T::getName($this->type), E_USER_WARNING); |
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return null; |
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} |
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} |
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private static function getScalar($v) |
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{ |
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$types = ['yes' => true, |
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'no' => false, |
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'true' => true, |
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'false' => false, |
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'null' => null, |
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'.inf' => INF, |
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'-.inf' => -INF, |
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'.nan' => NAN |
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]; |
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if (in_array(strtolower($v), array_keys($types))) return $types[strtolower($v)]; |
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226
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if (R::isDate($v)) return date_create($v); |
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if (R::isNumber($v)) return self::getNumber($v); |
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return strval($v); |
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} |
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private static function getNumber($v) |
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{ |
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if (preg_match("/^(0o\d+)$/i", $v)) return intval(base_convert($v, 8, 10)); |
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234
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if (preg_match("/^(0x[\da-f]+)$/i", $v)) return intval(base_convert($v, 16, 10)); |
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// if preg_match("/^([\d.]+e[-+]\d{1,2})$/", $v)://fall through |
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// if preg_match("/^([-+]?(?:\d+|\d*.\d+))$/", $v): |
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return is_bool(strpos($v, '.')) ? intval($v) : floatval($v); |
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238
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} |
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240
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//TODO : that's not robust enough, improve it |
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private static function getShortMapping($mappingString):object |
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242
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{ |
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243
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$out = new \StdClass(); |
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foreach (explode(',', $mappingString) as $value) { |
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list($keyName, $keyValue) = explode(':', $value); |
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246
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$out->{trim($keyName)} = self::getScalar(trim($keyValue)); |
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247
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} |
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return $out; |
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} |
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250
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251
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public function __debugInfo():array |
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252
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{ |
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253
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$out = ['line' => $this->line, |
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254
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'indent'=> $this->indent, |
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255
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'type' => T::getName($this->type), |
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256
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'value' => $this->value]; |
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257
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if (!is_null($this->identifier)) $out['type'] .= "($this->identifier)"; |
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258
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return $out; |
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259
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} |
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260
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} |
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dallgoot /
yaml
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