/**
* Short description of method createConditionExpressionFromString
*
* @access public
* @author Joel Bout, <*****@*****.**>
* @param string string
* @return core_kernel_rules_Expression
*/
public function createConditionExpressionFromString($string)
{
$returnValue = null;
//test: "IF (11+B_Q01a*3)>=2 AND (B_Q01c=2 OR B_Q01c=7) THEN ^variable := 2*(B_Q01a+7)-^variable";
$question = "if " . $string;
// str_replace taken from the MsReader class
$question = str_replace("�", "'", $question);
// utf8...
$question = str_replace("�", "'", $question);
// utf8...
$question = str_replace("�", "\"", $question);
$question = str_replace("�", "\"", $question);
try {
$analyser = new Analyser();
common_Logger::i('analysing expression \'' . $question . '\'');
$tokens = $analyser->analyse($question);
} catch (Exception $e) {
throw new common_Exception("CapiXML error: {$e->getMessage()}");
}
$returnValue = $this->createConditionExpressionFromXML($tokens->getXml());
return $returnValue;
}
function reduce(&$tokens)
{
$level = 1;
$tokenCloseParenthesis = new TokenCloseParenthesis();
$begin = 1 + $tokens->pos($this);
// first token after the parenthesis
// echo "REDUCE $tokens @$begin\n";
/*
* echo "call\n"; print_r($tokens);
*/
for ($cursor = $begin; $cursor < $tokens->count(); $cursor++) {
$token = $tokens->get($cursor);
// echo "@ '$token'\n";
// echo "@ ".get_class($token)." - '".get_class($this)."'\n";
if ($token->typeOf($this)) {
$level++;
// echo "i+\n";
} else {
if ($token->typeOf($tokenCloseParenthesis)) {
$level--;
// echo "i-\n";
}
}
if (0 == $level) {
$begin--;
// $begin is at the position of the opening parenthesis
$end = $cursor;
// $end is at the position of the closing parenthesis
// echo "'$begin' '$end'\n";
// $toto = $tokens->subSet($begin, $end);
/*
* print_r($toto); exit();
*/
$analyser = new Analyser();
$subReduce = $analyser->analyse($tokens->subSet($begin + 1, $end - 1));
// exit();
$tokens->delSet($begin, $end, $subReduce);
return;
}
}
// TODO: tell which was the opening parenthesis
throw new Exception("Closing parenthesis not found");
}
/**
* Short description of method analyseExpression
*
* @access public
* @author Joel Bout, <*****@*****.**>
* @param string expressionInput
* @param boolean isCondition
* @return DomDocument
*/
public function analyseExpression($expressionInput, $isCondition = false)
{
$returnValue = null;
//place the following bloc in a helper
if (!empty($expressionInput)) {
$question = $expressionInput;
} else {
$question = "";
}
//question test:
//$question = "IF (11+B_Q01a*3)>=2 AND (B_Q01c=2 OR B_Q01c=7) THEN ^variable := 2*(B_Q01a+7)-^variable";
//analyse the expressionInput string and convert to an XML document:
if (get_magic_quotes_gpc()) {
$question = stripslashes($question);
// Magic quotes are deprecated
}
//TODO: check if the variables exists and are associated to the process definition
$returnValue = null;
if (!empty($question)) {
// something to parse
// str_replace taken from the MsReader class
$question = str_replace("�", "'", $question);
// utf8...
$question = str_replace("�", "'", $question);
// utf8...
$question = str_replace("�", "\"", $question);
$question = str_replace("�", "\"", $question);
if ($isCondition) {
$question = "if " . $question;
}
try {
$analyser = new Analyser();
common_Logger::i('analysing expression \'' . $question . '\'');
$tokens = $analyser->analyse($question);
// $xml = htmlspecialchars($tokens->getXmlString(true));
// $xml = $tokens->getXmlString(true);
$returnValue = $tokens->getXml();
} catch (Exception $e) {
throw new common_Exception("CapiXML error: {$e->getMessage()}");
}
}
return $returnValue;
}