| 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 |