WP Import Function Editor - Using PHP to assign product categories

Question

I inherited a website which uses WP Import to create/update products in woocommerce and whilst some of the imports are done using the category mapping within the setup, quite a lot of it is done via the Function Editor and php.

Unfortunately, I know almost nothing about how it works so I'm looking for some help please.

The outcome I am looking for is that the import is first assigned a category based on the $category mapping, and then via the $productname if it contains keywords.

I know enough to see that the below, a condensed snippet of the php, is splitting up these two ideas into separate functions. Meaning within the import I have to call a different function depending on whether I want to check product name or category.

If anyone can help me combine these into one function, where I can build out category mapping based on import category followed by product name I would really appreciate it.

function join_categories($backupcategory, $category)
{
    $formattedCurrentCat = strtoupper($category);
    $newCat2 = $category;
    
    if (strpos($formattedCurrentCat, "SOMETHING ABSOLUTELY RIDICULOUS"))
    {
        $newCat2 = "Test Category";
    }
else if (strpos($formattedCurrentCat, "SHIRTS > pale green"))
{
$newCat2 = "SHIRTS > GREEN";
}
else if (strpos($formattedCurrentCat, "SHIRTS > navy blue"))
{
$newCat2 = "SHIRTS > BLUE";
}
    else
    {
        $newCat2 = $backupcategory;
    }
    //return $newCat2;
    $newCat2 = explode( ">", $newCat2 );
    array_walk( $newCat2, 'trim' );
    return array_pop( $newCat2 );
}

function map_categories($productname, $real_category)
{
    $formattedCurrentCat = strtoupper($productname);
    $newCat = $productname;
    
    if (strpos($formattedCurrentCat, "green shirt"))
    {
        $newCat = "SHIRTS > GREEN";
    }
    else if (strpos($formattedCurrentCat, "blue shirt")
        || (strpos($formattedCurrentCat, "blue") && strpos($formattedCurrentCat, "shirt")))
    {
        $newCat = "SHIRTS > BLUE";
    }
    else if (strpos($formattedCurrentCat, "shirt"))
    {
        $newCat = "SHIRTS";
    }
    else
    {
        $newCat = "Other > Misc";
    }
    //return $newCat;
    $newCat = explode( ">", $newCat );
    array_walk( $newCat, 'trim' );
    return array_pop( $newCat );
}

Sorry if this is all poorly worded, I'm new to php.