Building Shipping Module Question

[skrillnet]

Could someone point me to where it decides what shipping modules to display? I need to setup a conditional statement that only displays an option when a database field is equal to "XXXX" or something else....you get the picture.

Anyway, where does it actually make this decision? I've found a couple variables that seem to decide what shipping methods are allowed, I am just not seeing where it actually constructs this var. Also, it seems to only hold the selected module, I need to catch it before then.

And since rereading that, now I'm confused, I hope someone can decipher what I'm trying to ask. Basically, where the heck does zen cart say, "oh yea use this and that, but not those" as far as shipping goes.

Thanks!

[Ajeh]

Let's say you want to test if any Products in the Cart are from master_categories_id 10 or 12 ...

If some exist, you want to turn OFF the Flat Rate flat shipping module ...

Add the code in RED to the file:
/includes/modules/shipping/flat.php

      // disable only when entire cart is free shipping
      if (zen_get_shipping_enabled($this->code)) {
        $this->enabled = ((MODULE_SHIPPING_FLAT_STATUS == 'True') ? true : false);
      }

// bof: add extra control
  // do not run unless in catalog
  if (!IS_ADMIN_FLAG) {
    // check the count of a specific field
    $chk_cat = 0;
    // check how many Products are in the cart for master_categories_id 10 and 12
    $chk_cat += $_SESSION['cart']->in_cart_check('master_categories_id','10');
    $chk_cat += $_SESSION['cart']->in_cart_check('master_categories_id','12');
    // if any are found turn off the shipping module
    if ($chk_cat > 0) {
      $this->enabled = false;
    }
  }
// eof: add extra control

      if ( ($this->enabled == true) && ((int)MODULE_SHIPPING_FLAT_ZONE > 0) ) {

There are lots of ways to customize shipping modules ...

[skrillnet]

OK, so I would need to add it to all shipping modules I need to include in this. Basically I am setting up so UPS shipping shows if a drop ship item is in the cart, and USPS shows if it is strictly items from the clients shop. But neither can show if the other is showing.

Thanks!

[Ajeh]

Yes, you can use the function in_cart_check in the shopping_cart class to test any field in the products table and see if any are in the cart ...

What are you going to do if you have 1 Product that uses UPS and 1 Product that uses USPS?

[skrillnet]

I don't have a good answer for that, but since the UPS rates are higher and most of the drop shippers use UPS, I figured on having it as a flag type variable, so that once it is flagged, it only shows UPS for the order, and disregards the items that would ship through USPS normally.

It isn't perfect, but the client is losing cash on almost every drop ship item, so this is what we have for now. He doesn't want to invest the time to build a module that breaks it all down and deals with all the eventualities.

[skrillnet]

One more quick question, is there a way to check a negative with that function? Or something built in that does this? Basically need something like this

$_SESSION['cart']->in_cart_check("some_column","!=0"); 

[skrillnet]

Changed the in_cart_check to accept a comparison variable too. Here is the edit if anyone is interested.

/zen_cart/includes/classes/shopping_cart.php

edit beginning of function to read this

  function in_cart_check($check_what, $check_value='1',[B] $operator = "=="[/B]) { 

Then edited further down in the function to handle what I needed it to, for more operators, more cases are needed.

      if($operator != "=="){
        switch($operator){
            case ">":
              if ($product_check->fields['check_it'] > $check_value) {
                $in_cart_check_qty += $this->contents[$products_id]['qty'];
              }
            break;
            case "<":
              if ($product_check->fields['check_it'] < $check_value) {
                $in_cart_check_qty += $this->contents[$products_id]['qty'];
              }
               break;
        }
      } else {
          if ($product_check->fields['check_it'] == $check_value) {
            $in_cart_check_qty += $this->contents[$products_id]['qty'];
          }
      } 

And it needs to replace this

          if ($product_check->fields['check_it'] == $check_value) {
            $in_cart_check_qty += $this->contents[$products_id]['qty'];
          } 

If there is a better way to do this, let me know. Now, I just run the check you suggested, change the operator to greater than, and I'm good to go.

Thanks for the help!

[skrillnet]

and in the first block take out the bold bbcode tags....

[RodG]

If there is a better way to do this, let me know.

Nice code!

Cheers
Rod