TC My Purchases

This operator enables the purchase history of a logged in user to be accessed in a product.tpl template to show different information to the user based on their order history.
This is primarily used to enabled downloadable purchases by using a template switch to show download links in place of the "add to cart" button for users who have already purchased the product.
Usage example:
Define the current users purchase list as an array in the full/product.tpl:

{def $my_buys = fetch(user, current_user)|my_purchases}

Put in download links if the current user has purchased the product:

{if and($my_buys|array_keys|contains($node.object.id), array('Pending', 'Delivered')|contains($my_buys[$node.object.id]) )}