ajaxCookieList

<?php
// Requests
if($_GET['action']){
    $action = $_GET['action'];
}
if($_GET['id']){
    $id = $_GET['id'];
}

// Some settings (you can chnage this when you call snippet like [[!ajaxCookieList? &cookieName=`wishlist`]])
$cookieTime = 3600;
$duration = time() + (int) $cookieTime;
$cookieName = 'favorites';
$parents = '6';
$tpl = 'popup.favorites.item';
$includeTVs = 'header.bgImage,franchise.logo,franchise.price,title,subtitle';

// Here we will be store our resource ids
$values = [];

// Let's check if we already have cookies and convert it to array
if(isset($_COOKIE[$cookieName])){
    $values = explode(',', $_COOKIE[$cookieName]);
}

// If user clicked add button
if($action == 'add'){
    // Check if we don't have this resource in array
    if(!in_array($id, $values)){
        $values[] = $id;
    }
}
// If user mistaked or changed his mind
if($action == 'remove'){
    $values = explode(',', $_COOKIE[$cookieName]);
    // If we have removing value in cookies
    if(in_array($id, $values)){
        // find it
        $index = array_search($id, $values);
        // delete it
        unset($values[$index]);
    }
}

// Separate with comma resources
$cookieValues = implode(',', $values);

// Now we will update cookies
setcookie($cookieName, $cookieValues, $duration, '/');

// Final result of cookies, like "1,2,3"
// We check if there any fresh values in our array and if not we grab data from cookie
$ids = isset($cookieValues) ? $cookieValues : $_COOKIE[$cookieName];

$result = array(
    'parents' => (!empty($ids)) ? $parents : '',
    'resources' => $ids,
    'tpl' => $tpl,
    'includeTVs' => $includeTVs,
    'prepareTVs' => '1',
    'hideContainers' => '1'
);

return $modx->runSnippet('pdoResources', $result);