Merx – Plugin to create online shops with Kirby 3

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Welcome on board Julien and thanks for using Merx and buying a license. Your shop, as you describe it, sounds very promising. I’m looking forward to seeing it live in action. I am pleased to hear that Merx’s intended flexibility seems to work for you (calculate shipping based on weight of goods).

Regarding your question: Maybe you don’t need the ww.merx.cart hook.

For merx.wagnerwagner.de/buy I update the cart via a merx-api/update-cart route when the country changes (Germans have to pay 19 % Vat). This country dropdown could be your pick up at the shop checkbox. So your cart-hook could be like this (untested):

'method' => 'post',
'pattern' => 'custom-api/update-cart',
'action' => function() {
  $cart = cart();
  if ((string)$_POST['pickup'] === 'on') {
    $cart->remove('shipping');
  } else {
    // … calculate shipping costs based on weight and/or $_POST['country']
    $shippingCosts = 12.99;
    $cart->add([
      'id' => 'shipping',
      'price' => $shippingCosts,
    ]);
  }
}

If you need the same functionality in the ww.merx.cart hook and in your update-cart route adding a method to your OrderPage class could be an option but I think it’s not the ideal solution. You can create a global function at config.php which should be available in the hook and the route.

I hope this helps a little. If you want, I can take a closer look at the code and your implementation.

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