Here some code from HikaMarket which uses the 4 triggers.
In your case, the 2 first triggers are useful (because you don't have any kind of validation).
Code:
class plgHikashopMarket extends JPlugin {
public function onCheckoutStepList(&$list) {
$list['plg.market.terms'] = 'HikaMarket ' . JText::_('HIKASHOP_CHECKOUT_TERMS');
}
public function onCheckoutStepDisplay($layoutName, &$html, &$view) {
if($layoutName == 'plg.market.terms') {
$params = new stdClass();
$params->view = $view;
$js = null;
$html .= hikamarket::getLayout('checkoutmarket', 'terms', $params, $js);
}
}
public function onBeforeCheckoutStep($controllerName, &$go_back, $original_go_back, &$controller) {
}
public function onAfterCheckoutStep($controllerName, &$go_back, $original_go_back, &$controller) {
if($controllerName == 'plg.market.terms') {
$checkoutClass = hikamarket::get('class.checkout');
$checkoutClass->afterCheckoutStep($controllerName, $go_back, $original_go_back, $controller);
}
}
}
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