/**
* Translate expression to xpath
*
* @param string $expression
* @return string
*/
public function convertToXpath($expression)
{
if (!is_string($expression)) {
throw new \InvalidArgumentException('Expect expression to be the type of string. Given: ' . gettype($expression));
}
$expression = trim($expression);
if (empty($expression)) {
throw new \InvalidArgumentException('Expect not empty expression');
}
if ($expression === '.') {
return $expression;
}
if (strpos($expression, './') === 0) {
return $expression;
}
$firstChar = substr($expression, 0, 1);
if (in_array($firstChar, ['/', '('])) {
return $expression;
}
return $this->cssTranslator->convertToXpath($expression);
}
/**
* @param string $expression
* @return string
*/
private function convertExpression($expression)
{
return $this->expressionTranslator->convertToXpath($expression);
}
