| Total Complexity | 75 | 
| Total Lines | 252 | 
| Duplicated Lines | 0 % | 
| Changes | 0 | ||
Complex classes like Node often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Node, and based on these observations, apply Extract Interface, too.
| 1 | <?php  | 
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| 7 | class Node  | 
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| 8 | { | 
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| 9 | /** @var int */  | 
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| 10 | public $indent = -1;  | 
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| 11 | /** @var int */  | 
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| 12 | public $line;  | 
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| 13 | /** @var int */  | 
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| 14 | public $type;  | 
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| 15 | /** @var null|string|boolean */  | 
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| 16 | public $identifier;  | 
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| 17 | /** @var Node|DLL|null|string */  | 
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| 18 | public $value;  | 
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| 19 | |||
| 20 | /** @var null|Node */  | 
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| 21 | private $parent;  | 
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| 22 | |||
| 23 | public function __construct($nodeString = null, $line = null)  | 
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| 24 |     { | 
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| 25 | $this->line = $line;  | 
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| 26 |         if (is_null($nodeString)) { | 
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| 27 | $this->type = T::ROOT;  | 
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| 28 |         } else { | 
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| 29 | $this->parse($nodeString);  | 
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| 30 | }  | 
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| 31 | }  | 
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| 32 | |||
| 33 | public function setParent(Node $node):Node  | 
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| 34 |     { | 
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| 35 | $this->parent = $node;  | 
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| 36 | return $this;  | 
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| 37 | }  | 
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| 38 | |||
| 39 | public function getParent($indent = null):Node  | 
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| 47 | }  | 
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| 48 | |||
| 49 | public function add(Node $child):void  | 
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| 50 |     { | 
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| 51 | $child->setParent($this);  | 
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| 52 | $current = $this->value;  | 
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| 53 | if (in_array($this->type, T::$LITTERALS)) $child->type = T::SCALAR;  | 
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| 54 |         if (is_null($current)) { | 
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| 55 | $this->value = $child;  | 
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| 56 | return;  | 
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| 57 |         } elseif ($current instanceof Node) { | 
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| 58 | $this->value = new DLL();  | 
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| 59 | $this->value->setIteratorMode(DLL::IT_MODE_KEEP);  | 
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| 60 | $this->value->push($current);  | 
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| 61 | }  | 
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| 62 | $this->value->push($child);  | 
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| 63 | //modify type according to child  | 
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| 64 |         if ($this->value instanceof DLL && !property_exists($this->value, "type")) { | 
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| 65 |             switch ($child->type) { | 
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| 66 | case T::KEY: $this->value->type = T::MAPPING;break;  | 
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| 67 | case T::ITEM: $this->value->type = T::SEQUENCE;break;  | 
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| 68 | case T::SCALAR: $this->value->type = $this->type;break;  | 
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| 69 | }  | 
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| 70 | }  | 
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| 71 | }  | 
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| 72 | |||
| 73 | public function getDeepestNode():Node  | 
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| 74 |     { | 
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| 75 | $cursor = $this;  | 
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| 76 |         while ($cursor->value instanceof Node) { | 
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| 77 | $cursor = $cursor->value;  | 
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| 78 | }  | 
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| 79 | return $cursor;  | 
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| 80 | }  | 
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| 81 | |||
| 82 | /**  | 
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| 83 | * CAUTION : the types assumed here are NOT FINAL : they CAN be adjusted according to parent  | 
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| 84 | */  | 
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| 85 | public function parse(String $nodeString):Node  | 
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| 86 |     { | 
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| 87 |         $nodeValue = preg_replace("/^\t+/m", " ", $nodeString);//permissive to tabs but replacement | 
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| 88 | $this->indent = strspn($nodeValue, ' ');  | 
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| 89 | $nodeValue = ltrim($nodeValue);  | 
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| 90 |         if ($nodeValue === '') { | 
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| 91 | $this->type = T::EMPTY;  | 
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| 92 | // $this->indent = 0; // remove if no bugs  | 
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| 93 |         } elseif (substr($nodeValue, 0, 3) === '...') {//TODO: can have something on same line ? | 
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| 94 | $this->type = T::DOC_END;  | 
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| 95 |         } elseif (preg_match(R::KEY, $nodeValue, $matches)) { | 
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| 96 | $this->onKey($matches);  | 
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| 97 |         } else {//NOTE: can be of another type according to parent | 
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| 98 | list($this->type, $value) = $this->define($nodeValue);  | 
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| 99 | is_object($value) ? $this->add($value) : $this->value = $value;  | 
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| 100 | }  | 
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| 101 | return $this;  | 
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| 102 | }  | 
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| 103 | |||
| 104 | /**  | 
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| 105 | * Set the type and value according to first character  | 
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| 106 | *  | 
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| 107 | * @param string $nodeValue The node value  | 
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| 108 | * @return array contains [node->type, node->value]  | 
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| 109 | */  | 
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| 110 | private function define($nodeValue):array  | 
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| 111 |     { | 
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| 112 | $v = substr($nodeValue, 1);  | 
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| 113 |         if (in_array($nodeValue[0], ['"', "'"])) { | 
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| 114 | $type = R::isProperlyQuoted($nodeValue) ? T::QUOTED : T::PARTIAL;  | 
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| 115 | return [$type, $nodeValue];  | 
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| 116 | }  | 
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| 117 |         if (in_array($nodeValue[0], ['{', '[']))      return $this->onObject($nodeValue); | 
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| 118 | if (in_array($nodeValue[0], ['!', '&', '*'])) return $this->onNodeAction($nodeValue);  | 
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| 119 |         switch ($nodeValue[0]) { | 
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| 120 | case '#': return [T::COMMENT, ltrim($v)];  | 
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| 121 | case "-": return $this->onHyphen($nodeValue);  | 
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| 122 | case '%': return [T::DIRECTIVE, ltrim($v)];  | 
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| 123 | case '?': return [T::SET_KEY, empty($v) ? null : new Node(ltrim($v), $this->line)];  | 
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| 124 | case ':': return [T::SET_VALUE, empty($v) ? null : new Node(ltrim($v), $this->line)];  | 
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| 125 | case '>': return [T::LITTERAL_FOLDED, null];  | 
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| 126 | case '|': return [T::LITTERAL, null];  | 
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| 127 | default:  | 
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| 128 | return [T::SCALAR, $nodeValue];  | 
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| 129 | }  | 
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| 130 | }  | 
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| 131 | |||
| 132 | private function onKey($matches):void  | 
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| 133 |     { | 
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| 134 | $this->type = T::KEY;  | 
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| 135 | $this->identifier = trim($matches[1]);  | 
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| 136 | $keyValue = isset($matches[2]) ? trim($matches[2]) : null;  | 
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| 137 |         if (!empty($keyValue)) { | 
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| 138 | $n = new Node($keyValue, $this->line);  | 
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| 139 | $hasComment = strpos($keyValue, ' #');  | 
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| 140 |             if (!is_bool($hasComment)) { | 
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| 141 | $tmpNode = new Node(trim(substr($keyValue, 0, $hasComment)), $this->line);  | 
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| 142 |                 if ($tmpNode->type !== T::PARTIAL) { | 
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| 143 | $comment = new Node(trim(substr($keyValue, $hasComment+1)), $this->line);  | 
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| 144 | //TODO: modify "identifier" to specify if fullline comment or not  | 
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| 145 | $this->add($comment);  | 
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| 146 | $n = $tmpNode;  | 
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| 147 | }  | 
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| 148 | }  | 
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| 149 | $n->indent = $this->indent + strlen($this->identifier);  | 
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| 150 | $this->add($n);  | 
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| 151 | }  | 
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| 152 | }  | 
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| 153 | |||
| 154 | private function onObject($value):array  | 
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| 155 |     { | 
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| 156 | json_decode($value, false, 512, JSON_PARTIAL_OUTPUT_ON_ERROR|JSON_UNESCAPED_SLASHES);  | 
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| 157 | if (json_last_error() === JSON_ERROR_NONE) return [T::JSON, $value];  | 
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| 158 | if (preg_match(R::MAPPING, $value)) return [T::MAPPING_SHORT, $value];  | 
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| 159 | if (preg_match(R::SEQUENCE, $value)) return [T::SEQUENCE_SHORT, $value];  | 
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| 160 | return [T::PARTIAL, $value];  | 
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| 161 | }  | 
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| 162 | |||
| 163 | private function onHyphen($nodeValue):array  | 
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| 180 | }  | 
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| 181 | |||
| 182 | private function onNodeAction($nodeValue):array  | 
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| 183 |     { | 
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| 184 | // TODO: handle tags like <tag:clarkevans.com,2002:invoice>  | 
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| 185 | $v = substr($nodeValue, 1);  | 
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| 186 | $type = ['!' => T::TAG, '&' => T::REF_DEF, '*' => T::REF_CALL][$nodeValue[0]];  | 
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| 187 | $pos = strpos($v, ' ');  | 
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| 188 | $this->identifier = is_bool($pos) ? $v : strstr($v, ' ', true);  | 
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| 189 | $n = is_bool($pos) ? null : (new Node(trim(substr($nodeValue, $pos+1)), $this->line))->setParent($this);  | 
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| 190 | return [$type, $n];  | 
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| 191 | }  | 
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| 192 | |||
| 193 | public function getPhpValue()  | 
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| 194 |     { | 
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| 195 | $v = $this->value;  | 
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| 196 | if (is_null($v)) return null;  | 
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| 197 |         switch ($this->type) { | 
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| 198 | case T::JSON: return json_decode($v, false, 512, JSON_PARTIAL_OUTPUT_ON_ERROR);  | 
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| 199 | case T::QUOTED: return substr($v, 1, -1);  | 
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| 200 | case T::RAW: return strval($v);  | 
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| 201 | case T::REF_CALL://fall through  | 
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| 202 | case T::SCALAR: return self::getScalar($v);  | 
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| 203 | case T::MAPPING_SHORT: return self::getShortMapping(substr($v, 1, -1));  | 
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| 204 | //TODO : that's not robust enough, improve it  | 
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| 205 | case T::SEQUENCE_SHORT:  | 
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| 206 |                 $f = function ($e) { return self::getScalar(trim($e));}; | 
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| 207 |                 return array_map($f, explode(",", substr($v, 1, -1))); | 
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| 208 | default:  | 
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| 209 |                 trigger_error("Error can not get PHP type for ".T::getName($this->type), E_USER_WARNING); | 
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| 210 | return null;  | 
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| 211 | }  | 
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| 212 | }  | 
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| 213 | |||
| 214 | private static function getScalar($v)  | 
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| 215 |     { | 
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| 216 | $types = ['yes' => true,  | 
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| 217 | 'no' => false,  | 
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| 218 | 'true' => true,  | 
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| 219 | 'false' => false,  | 
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| 220 | 'null' => null,  | 
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| 221 | '.inf' => INF,  | 
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| 222 | '-.inf' => -INF,  | 
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| 223 | '.nan' => NAN  | 
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| 224 | ];  | 
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| 225 | if (in_array(strtolower($v), array_keys($types))) return $types[strtolower($v)];  | 
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| 226 | if (R::isDate($v)) return date_create($v);  | 
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| 227 | if (R::isNumber($v)) return self::getNumber($v);  | 
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| 228 | return strval($v);  | 
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| 229 | }  | 
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| 230 | |||
| 231 | private static function getNumber($v)  | 
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| 238 | }  | 
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| 239 | |||
| 240 | //TODO : that's not robust enough, improve it  | 
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| 241 | private static function getShortMapping($mappingString):object  | 
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| 242 |     { | 
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| 243 | $out = new \StdClass();  | 
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| 244 |         foreach (explode(',', $mappingString) as $value) { | 
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| 245 |             list($keyName, $keyValue) = explode(':', $value); | 
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| 246 |             $out->{trim($keyName)} = self::getScalar(trim($keyValue)); | 
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| 247 | }  | 
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| 248 | return $out;  | 
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| 249 | }  | 
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| 250 | |||
| 251 | public function __debugInfo():array  | 
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| 259 | }  | 
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| 260 | }  | 
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| 261 |