Sendex snippet for ajaxFrom

subscribeMe.php

<?php
/** @var array $scriptProperties */
/** @var Sendex $Sendex */
$Sendex = $modx->getService('sendex','Sendex',$modx->getOption('sendex_core_path',null,$modx->getOption('core_path').'components/sendex/').'model/sendex/',$scriptProperties);
if (!($Sendex instanceof Sendex)) return '';

if (empty($tplSubscribeAuth)) {$tplSubscribeAuth = 'tpl.Sendex.subscribe.auth';}
if (empty($tplSubscribeGuest)) {$tplSubscribeGuest = 'tpl.Sendex.subscribe.guest';}
if (empty($tplUnsubscribe)) {$tplUnsubscribe = 'tpl.Sendex.unsubscribe';}
if (empty($tplActivate)) {$tplActivate = 'tpl.Sendex.activate';}
if (empty($linkTTL)) {$linkTTL = 1800;}

if (empty($id) || !$newsletter = $modx->getObject('sxNewsletter', $id)) {
	return $modx->lexicon('sendex_newsletter_err_ns');
}

/** @var sxNewsletter $newsletter */
if (!$newsletter->active && empty($showInactive)) {
	return $modx->lexicon('sendex_newsletter_err_disabled');
}

$placeholders = $newsletter->toArray();
$placeholders['message'] = '';
$placeholders['error'] = 0;
if ($modx->user->isAuthenticated($modx->context->key)) {
	$placeholders = array_merge(
		$modx->user->toArray(),
		$modx->user->Profile->toArray(),
		$placeholders
	);
}

$isAuthenticated = $modx->user->isAuthenticated($modx->context->key);

if (!empty($_REQUEST['sx_action'])) {
	$isAjax = isset($_SERVER['HTTP_X_REQUESTED_WITH']) && $_SERVER['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest';

	$params = $_GET;
	unset($params[$modx->getOption('request_param_alias')]);
	unset($params[$modx->getOption('request_param_id')]);

	switch ($_REQUEST['sx_action']) {
		case 'subscribe':
			if ($isAuthenticated && $modx->user->id) {
				if (!$response = $newsletter->Subscribe($modx->user->id)) {
					$placeholders['message'] = $modx->lexicon('sendex_subscribe_err_email_wrong');
					$placeholders['error'] = 1;
				}
			}
			elseif (!empty($_REQUEST['email'])) {
				$email = htmlentities(strip_tags(urldecode($_REQUEST['email'])));
				$_SESSION['subscriber_email'] = $email;
				$response = $newsletter->checkEmail($email, $modx->user->id, $linkTTL);
				if ($response === true) {
					$placeholders['message'] = $modx->lexicon('sendex_subscribe_err_already');
				}
				elseif ($response === false) {
					$placeholders['message'] = $modx->lexicon('sendex_subscribe_err_email_wrong');
					$placeholders['error'] = 1;
				}
				else {
					$params['hash'] = $response;
					$params['sx_action'] = 'confirm';
					$placeholders['link'] = $modx->makeUrl($modx->resource->id, $modx->context->key, $params, 'full');
					$placeholders['email_body'] = $modx->getChunk($tplActivate, $placeholders);
					$response = $Sendex->sendEmail($email, $placeholders);
					if ($response !== true) {
						$placeholders['message'] = $modx->lexicon('sendex_subscribe_err_email_send');
						$placeholders['error'] = 1;
					} else {
					    $params['sx_subscribed'] = 1;
					}
				}
			}
			else {
				$placeholders['message'] = $modx->lexicon('sendex_subscribe_err_email_ns');
				$placeholders['error'] = 1;
			}
			unset($params['email'], $params['hash']);
			break;
		case 'confirm':
			if (!empty($_REQUEST['hash'])) {
				$response = $newsletter->confirmEmail($_REQUEST['hash']);
				$params['sx_confirmed'] = 1;
				unset($params['hash']);
			}
			break;
		case 'unsubscribe':
			if (!empty($_REQUEST['code'])) {
				$response = $newsletter->unSubscribe($_REQUEST['code']);
				$params['sx_unsubscribed'] = 1;
				unset($_SESSION['subscriber_email']);
			}
			unset($params['code']);
			break;
	}

	unset($params['sx_action']);
	if (!$isAjax && empty($placeholders['message'])) {
		$modx->sendRedirect($modx->makeUrl($modx->resource->id, $modx->context->key, $params, 'full'));
	}
}

if ($isAuthenticated && $id = $newsletter->isSubscribed($modx->user->id)) {
	if ($subscriber = $modx->getObject('sxSubscriber', $id)) {
		$placeholders = array_merge($subscriber->toArray(), $placeholders);
	}
	$output = $modx->getChunk($tplUnsubscribe, $placeholders);
}
else {
	$output = $isAuthenticated
		? $modx->getChunk($tplSubscribeAuth, $placeholders)
		: $modx->getChunk($tplSubscribeGuest, $placeholders);
}

if (!empty($isAjax)) {
	@session_write_close();
	//exit($output);
	exit(json_encode(array(
	    'success' => !(isset($placeholders['error']) && $placeholders['error']),
	    'message' => $placeholders['message'],
    )));
}
else {
	return $output;
}