Activate Waitlist feature in products listing

Hi,

There is an option for that, you don't need to modify anything.

Edit the menu item of that listing in the Joomla menu manager (or via HikaShop > Display > Menus), open the "Products Options" tab and set the option "Waitlist button" to Yes. If the listing comes from a HikaShop products module instead, the same option is in the options of that module.

Two conditions must also be met for the button to actually show on a product of the listing:
- the option "Activate Waitlist feature" in HikaShop > System > Configuration > Features must be on. If you set it to "on a per product basis", the waitlist option must also be turned on in each product
- the product must be out of stock, as the waitlist button replaces the add to cart button