/**
* Evaluate simple expression
* expression is combination of text, simple expressiones and field variables
* simple expression - {...}
* field variable - [field name]
* expression samples: text1{[field1]*10}text2{function1([field2],'a')}text3
*
* @objname:property, @objname:field[fldname].property, @objname:control[ctrlname].property
* @:prop = @thisobjname:prop
* [fldname] = @thisobjname:field[fldname].value
* @demo.BOEvent:Name, @:Name
* @demo.BOEvent:Field[EventName].Column, @demo.BOEvent:Field[EventName].Value
* @demo.FMEvent:Control[evt_name].FieldName, @demo.FMEvent:Control[evt_name].Value
* [EventName] is @demo.BOEvent:Field[EventName].Value in BOEvent.xml
*
* @param string $expression - simple expression supported by the openbiz
* @param object $object
* @return mixed
**/
public static function evaluateExpression($expression, $object)
{
// TODO: check if it's "\[", "\]", "\{" or "\}"
$script = "";
$start = 0;
if (!self::isExpression($expression)) {
return $expression;
}
if (self::isCurrentObject($expression)) {
return $object;
}
// evaluate the expression between {}
while (true) {
list($tag, $openTagPos, $closeTagPos) = self::getNextContainerPos($expression, $start);
if ($openTagPos === false) {
if (substr($expression, $start)) {
$script .= substr($expression, $start);
}
break;
}
if ($openTagPos >= 0 && $closeTagPos > $openTagPos) {
$script .= substr($expression, $start, $openTagPos - $start);
$start = $closeTagPos + strlen(self::$expContainers[$tag]);
$section = substr($expression, $openTagPos + strlen($tag), $closeTagPos - $openTagPos - strlen($tag));
$_section = $section;
if ($object) {
//Openbiz::$app->getLog()->log(LOG_DEBUG, "EXPRESSION", "###expression 1: ".$section."");
$section = Expression::replaceVarExpr($section, $object);
// replace variable expr;
//Openbiz::$app->getLog()->log(LOG_DEBUG, "EXPRESSION", "###expression 2: ".$section."");
if ($_section == $section) {
if (is_subclass_of($object, "Openbiz\\Data\\BizDataObj") || get_class($object) == "Openbiz\\Data\\BizDataObj" and strstr($section, '[')) {
$section = Expression::replaceFieldsExpr($section, $object);
}
// replace [field] with its value
if (is_subclass_of($object, "Openbiz\\Easy\\EasyForm") || get_class($object) == "Openbiz\\Easy\\EasyForm" and strstr($section, '[')) {
$section = Expression::replaceElementsExpr($section, $object);
}
// replace [field] with its value
}
}
if ($section === false) {
$script = $script == '' ? $section : $script . $section;
}
if ($section != null and trim($section) != "" and $section != false) {
$ret = null;
//$section = str_replace($section, '\', '\\');
//echo $section . '<br />';
//if (Expression::eval_syntax("\$ret = $section;"))
if (($tag == '{fx}' || $tag == '{') && Expression::eval_syntax("\$ret = {$section};")) {
eval("\$ret = {$section};");
}
if ($ret === null) {
$ret = $section;
}
$script = $script == '' ? $ret : $script . $ret;
unset($ret);
}
} elseif ($openTagPos >= 0 && $closeTagPos <= $openTagPos) {
break;
}
}
return $script;
}