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<?php |
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/* @description Transformation Style Sheets - Revolutionising PHP templating * |
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* @author Tom Butler [email protected] * |
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* @copyright 2015 Tom Butler <[email protected]> | https://r.je/ * |
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* @license http://www.opensource.org/licenses/bsd-license.php BSD License * |
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* @version 1.0 */ |
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namespace Transphporm\Parser; |
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/** Parses "string" and function(args) e.g. data(foo) or iteration(bar) */ |
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class Value { |
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private $dataFunction; |
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private $callParamsAsArray; |
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private $parent; |
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public function __construct($dataFunction, Value $parent = null, $callParamsAsArray = true) { |
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$this->dataFunction = $dataFunction; |
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$this->callParamsAsArray = $callParamsAsArray; |
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$this->parent = $parent; |
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} |
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private function extractQuotedString($marker, $str) { |
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$finalPos = $this->findMatchingPos($str, $marker); |
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$string = substr($str, 1, $finalPos-1); |
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//Now remove escape characters |
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return str_replace('\\' . $marker, $marker, $string); |
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} |
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private function parseFunction($function) { |
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$open = strpos($function, '('); |
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if ($open) { |
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$name = substr($function, 0, $open); |
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$bracketMatcher = new BracketMatcher($function); |
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$params = $bracketMatcher->match('(', ')'); |
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return ['name' => $name, 'params' => $params, 'endPoint' => $bracketMatcher->getClosePos()]; |
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} |
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else return ['name' => null, 'params' => $function, 'endPoint' => strlen($function)]; |
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} |
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public function parse($function, \DomElement $element) { |
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$stringExtractor = new StringExtractor($function); |
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$parts = explode('+', $stringExtractor); |
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$result = []; |
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foreach ($parts as $part) { |
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$part = $stringExtractor->rebuild($part); |
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$result = array_merge($result, $this->parseString(trim($part), $element)); |
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} |
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return $result; |
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} |
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private function parseString($function, $element) { |
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$result = []; |
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if ($function && in_array($function[0], ['\'', '"'])) { |
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$finalPos = $this->findMatchingPos($function, $function[0]); |
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$result[] = $this->extractQuotedString($function[0], $function); |
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} |
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else { |
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$func = $this->parseFunction($function); |
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$finalPos = $func['endPoint']; |
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if (($data = $this->getFunctionValue($func['name'], $func['params'], $element)) !== false) $result = $this->appendToArray($result, $data); |
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else $result[] = trim($function); |
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} |
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$remaining = trim(substr($function, $finalPos+1)); |
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return $this->parseNextValue($remaining, $result, $element); |
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} |
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private function getFunctionValue($name, $params, $element) { |
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if (($data = $this->callFunc($name, $params, $element)) !== false) { |
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return $data; |
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} |
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else if ($this->parent != null && ($data = $this->parent->callFunc($name, $params, $element)) !== false) { |
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return $data; |
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} |
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else return false; |
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} |
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private function appendToArray($array, $value) { |
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if (is_array($value)) $array += $value; |
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else $array[] = $value; |
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return $array; |
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} |
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private function callFunc($name, $params, $element) { |
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if ($name && $this->isCallable($this->dataFunction, $name)) { |
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if ($this->callParamsAsArray) return $this->dataFunction->$name($this->parse($params, $element), $element); |
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else { |
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return $this->callFuncOnObject($this->dataFunction, $name, $this->parse($params, $element)); |
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} |
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} |
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return false; |
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} |
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//is_callable does not detect closures on properties, only methods defined in the class! |
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private function isCallable($obj, $func) { |
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return (isset($obj->$func) && is_callable($obj->$func)) || is_callable([$obj, $func]); |
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} |
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private function callFuncOnObject($obj, $func, $params) { |
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$args = []; |
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foreach ($params as $param) { |
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$stringExtractor = new StringExtractor($param); |
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$parts = explode(',', $stringExtractor); |
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foreach ($parts as $part) $args[] = $stringExtractor->rebuild($part); |
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} |
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if (isset($obj->$func) && is_callable($obj->$func)) return call_user_func_array($obj->$func, $args); |
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else return call_user_func_array([$obj, $func], $args); |
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} |
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private function parseNextValue($remaining, $result, $element) { |
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if (strlen($remaining) > 0 && $remaining[0] == ',') $result = array_merge($result, $this->parse(trim(substr($remaining, 1)), $element)); |
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return $result; |
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} |
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private function findMatchingPos($string, $char, $start = 0, $escape = '\\') { |
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$pos = $start+1; |
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$end = 0; |
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while ($end = strpos($string, $char, $pos)) { |
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if ($string[$end-1] === $escape) $pos = $end+1; |
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else { |
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break; |
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} |
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} |
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return $end; |
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} |
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} |
Level-2 /
Transphporm
This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVarassignment in line 1 and the$higherassignment in line 2 are dead. The first because$myVaris never used and the second because$higheris always overwritten for every possible time line.