protected function compareField($field1, $operator, $field2, $error = null)
{
$operators = array('==' => 'equal to', '!=' => 'different to', '<=' => 'equal or lower than', '<' => 'lower than', '>=' => 'equal or greater than', '>' => 'greater than');
$bad_field_1 = !isset($this->fields[$field1]);
$bad_operator = !isset($operators[$operator]);
$bad_field_2 = !isset($this->fields[$field2]);
if ($bad_field_1) {
FormErrors::compareFieldNotExists($field1, $field1, $field2);
}
if ($bad_operator) {
FormErrors::compareOperatorNotExists($operator, $field1, $field2);
}
if ($bad_field_2) {
FormErrors::compareFieldNotExists($field2, $field1, $field2);
}
if (!$bad_field_1 && !$bad_operator && !$bad_field_2) {
if ($error === null) {
$error = sprintf(_("The field %s must be %s %s."), $field1, _($operators[$operator]), $field2);
}
$this->compare[] = array($field1, $operator, $field2, $error);
}
}
