Backend\Modules\Location\Actions\Add::validateForm PHP Method

    private function validateForm()
    {
        if ($this->frm->isSubmitted()) {
            $this->frm->cleanupFields();
            // validate fields
            $this->frm->getField('title')->isFilled(BL::err('TitleIsRequired'));
            $this->frm->getField('street')->isFilled(BL::err('FieldIsRequired'));
            $this->frm->getField('number')->isFilled(BL::err('FieldIsRequired'));
            $this->frm->getField('zip')->isFilled(BL::err('FieldIsRequired'));
            $this->frm->getField('city')->isFilled(BL::err('FieldIsRequired'));
            if ($this->frm->isCorrect()) {
                // build item
                $item['language'] = BL::getWorkingLanguage();
                $item['title'] = $this->frm->getField('title')->getValue();
                $item['street'] = $this->frm->getField('street')->getValue();
                $item['number'] = $this->frm->getField('number')->getValue();
                $item['zip'] = $this->frm->getField('zip')->getValue();
                $item['city'] = $this->frm->getField('city')->getValue();
                $item['country'] = $this->frm->getField('country')->getValue();
                // define coordinates
                $coordinates = BackendLocationModel::getCoordinates($item['street'], $item['number'], $item['city'], $item['zip'], $item['country']);
                // define latitude and longitude
                $item['lat'] = $coordinates['latitude'];
                $item['lng'] = $coordinates['longitude'];
                // insert the item
                $item['id'] = BackendLocationModel::insert($item);
                // everything is saved, so redirect to the overview
                if ($item['lat'] && $item['lng']) {
                    // trigger event
                    BackendModel::triggerEvent($this->getModule(), 'after_add', array('item' => $item));
                }
                // redirect
                $this->redirect(BackendModel::createURLForAction('Edit') . '&id=' . $item['id'] . '&report=added&var=' . rawurlencode($item['title']));
            }
        }
    }