/**
* @param ISurveyStep $current_step
* @param ISurveyQuestionTemplate $question
* @param array $static_rules
* @param FormField $field
*/
public function apply(ISurveyStep $current_step, ISurveyQuestionTemplate $question, array $static_rules, FormField $field)
{
if (count($static_rules)) {
foreach ($static_rules as $id => $info) {
$q = $info['question'];
$values = $info['values'];
$operator = $info['operator'];
$visibility = $info['visibility'];
$default = $info['default'];
$boolean_operator = $info['boolean_operator'];
$initial_condition = $info['initial_condition'];
$answer = $current_step->survey()->findAnswerByQuestion($q);
if (is_null($answer)) {
continue;
}
//checks the condition
switch ($operator) {
case 'Equal':
foreach ($values as $vid) {
if ($boolean_operator === 'And') {
$initial_condition &= strpos($answer->value(), $vid) !== false;
} else {
$initial_condition |= strpos($answer->value(), $vid) !== false;
}
}
break;
case 'Not-Equal':
foreach ($values as $vid) {
if ($boolean_operator === 'And') {
$initial_condition &= strpos($answer->value(), $vid) === false;
} else {
$initial_condition |= strpos($answer->value(), $vid) === false;
}
}
break;
}
//visibility
switch ($visibility) {
case 'Visible':
if (!$initial_condition) {
$field->addExtraClass('hidden');
// if not visible clean it
$field->setValue('');
} else {
$field->removeExtraClass('hidden');
}
break;
case 'Not-Visible':
if ($initial_condition) {
$field->addExtraClass('hidden');
// if not visible clean it
$field->setValue('');
} else {
$field->removeExtraClass('hidden');
}
break;
}
// set the default value set on the rule
if (!empty($default)) {
$field->setValue($default);
if ($question instanceof IMultiValueQuestionTemplate) {
$value_template = $question->getValueByValue($default);
if (!is_null($value_template)) {
$field->setValue($value_template->getIdentifier());
}
}
}
}
}
}