/**
* internal function to get the fields which are in the limits for one where clause in a relationship
* @param I2CE_MagicDataNode $whereConfig
* @param array $limited_fields array of boolean indexed by the names of the fields
*/
protected function _getLimitingFields($whereConfig, &$limiting_fields)
{
if (!$whereConfig instanceof I2CE_MagicDataNode) {
I2CE::raiseError("Invalid where clause");
return;
}
if (!isset($whereConfig->operator)) {
return;
}
if ($whereConfig->operator == 'FIELD_LIMIT') {
//see if we have a valid field, if so add it to our list
$whereConfig->setIfIsSet($field, 'field');
if ($field && !in_array($field, $limiting_fields)) {
$limiting_fields[$field] = true;
}
} else {
if (in_array($whereConfig->operator, self::$operands)) {
//go down
if (!$whereConfig->is_parent('operand')) {
return;
}
foreach ($whereConfig->operand as $operand => $opConfig) {
$this->_getLimitingFields($opConfig, $limiting_fields);
}
}
}
//else do nothing
}