Override notify mail address when certain products are ordered

<?php
// Map a product (or its parent product, for variants) to the
// recipient email address that should receive the admin notification
// when that product is in the order. Replace the example ids and
// addresses with yours, or add as many rows as you need.
$override_map = array(
    42 => 'sales-team-a@example.com',
    99 => 'sales-team-b@example.com',
);

if(!empty($data) && !empty($data->cart->products) && !empty($data->customer)) {
    foreach($data->cart->products as $p) {
        $pid     = isset($p->product_id) ? (int)$p->product_id : 0;
        $ppid    = isset($p->product_parent_id) ? (int)$p->product_parent_id : 0;
        $to      = isset($override_map[$pid]) ? $override_map[$pid]
                 : (($ppid && isset($override_map[$ppid])) ? $override_map[$ppid] : null);
        if($to !== null) {
            // Full replacement of the recipient. If you would rather
            // ADD to the configured admin emails instead of replacing
            // them, do:
            //   $current = (array)$data->customer->user_email;
            //   $current[] = $to;
            //   $data->customer->user_email = $current;
            $data->customer->user_email = $to;
            break;
        }
    }
}
?>

<?php
// Map a category id to the recipient email address that should
// receive the admin notification when any product in that category
// is in the order. Add more rows here if you want to handle several
// categories with different recipients.
$category_override_map = array(
    41 => 'category-41-team@example.com',
);

if(!empty($data) && !empty($data->cart->products) && !empty($data->customer)) {
    // Collect both the variant id and its parent product id, since
    // categories in HikaShop are typically assigned on the main
    // product, not on each variant.
    $product_ids = array();
    foreach($data->cart->products as $p) {
        if(!empty($p->product_id))
            $product_ids[(int)$p->product_id] = (int)$p->product_id;
        if(!empty($p->product_parent_id))
            $product_ids[(int)$p->product_parent_id] = (int)$p->product_parent_id;
    }

    if(!empty($product_ids)) {
        $db = JFactory::getDBO();
        $db->setQuery(
            'SELECT DISTINCT category_id FROM ' . hikashop_table('product_category') .
            ' WHERE product_id IN (' . implode(',', $product_ids) . ')'
        );
        $order_categories = array_map('intval', (array)$db->loadColumn());

        foreach($category_override_map as $catId => $to) {
            if(in_array((int)$catId, $order_categories, true)) {
                // Full replacement of the recipient. If you would rather ADD
                // to the configured admin emails instead of replacing them, do:
                //   $current = (array)$data->customer->user_email;
                //   $current[] = $to;
                //   $data->customer->user_email = $current;
                $data->customer->user_email = $to;
                break;
            }
        }
    }
}
?>