Order products by two parameters [solved]

[grsinternet]

In PS 1.7.6 I need to order products by two parameters:
1. First goes products which are available in physical shop, then order the by price from low to high.
2. Then goes products which are NOT available in physical shop, then order the by price from low to high.

In which file I can write my own ORDER BY rule to overwrite PS standard?

SQL query should look like that in simple table ORDER BY `available` ASC, `price` ASC; But not sure in which Table I can find this or similar field to `available` (if stock>0)

Thanks!! 😊💜🙏

Edited November 12, 2020 by grsinternet (see edit history)

[musicmaster]

might it be the function getProducts() in classes/category.php?

[grsinternet]

I have find out this - new updated faceted search module has this function integrated - products which has available stock can be ordered first! So this problem has been solved!