Prestashop - out of stock list - prestashop

Question

I have a prestashop shop, when I sell t-shirts. Every t-shirt have several sizes (combinations), i.e. M, L, XL etc.
In blocklayered filter there are two filters: "Available" and "Out of stock" products, but they behave weirdly: "out of stock" filter shows products, that have 0 quantity in one/several sizes.
How can I modify this to show on "out of stock" list only products, that have no items available in ALL available sizes.
What I mean is when a t-shirt have 3 items in size M, but 0 in size L, I do not want it to show on "Out of stock" list.
The second thing is - how can I hide products, that are truly "out of stock" (no items in all combinations) from default category list page? What I want to achieve is that on category pages we have "Archive" tab, which should show products that used to be available in shop, but they are not anymore.
I use PS 1.6.1.9

Answer 1

Open www/themes/yourtheme/product-list (Dont forget to backup)
Search for
{assign var='nbLi' value=$products|#count}
Right below add
{foreach from=$products item=product name=products}
{if ($product.quantity <= 0)}
{$nbLi=$nbLi-1}
{/if}
{/foreach}
Search for
{foreach from=$products item=product name=products}
Right below add
{if ($product.quantity > 0)}
Search for
{/foreach}
Right above add
{/if}
Replace all instances of
$smarty.foreach.products.total
and
$smarty.foreach.products.iteration
with
$nbLi
This question was anwsered by MEG Venture in the prestashop forum.
https://www.prestashop.com/forums/topic/537182-disable-out-of-stock-product-from-listing-only/

Answer 2

There is a function in StockAvailable.php core class of PrestaShop that can be used to find the actual quantity of any option of a product.
StockAvailable::getQuantityAvailableByProduct()
You can simply run through a loop for every option of a product and find the quantity for all options and mark the product out of stock only if any option is not available.