Ağır sepetlerde ekspres kargoyu gizleme

api_version = "2026-10"

[[extensions]]
name = "Hide express shipping for heavy carts"
handle = "hide-express-heavy-carts"
type = "function"

  [[extensions.targeting]]
  target = "cart.delivery-options.transform.run"
  input_query = "src/cart_delivery_options_transform_run.graphql"
  export = "cart-delivery-options-transform-run"

  [extensions.build]
  command = ""
  path = "dist/function.wasm"

query CartDeliveryOptionsTransformRunInput {
  cart {
    deliveryGroups {
      cartLines {
        quantity
        merchandise {
          __typename
          ... on ProductVariant {
            weight
            weightUnit
          }
        }
      }
      deliveryOptions {
        handle
        title
      }
    }
  }
  deliveryCustomization {
    metafield(namespace: "$app", key: "function-configuration") {
      jsonValue
    }
  }
}

// @ts-check

/**
 * @typedef {import("../generated/api").CartDeliveryOptionsTransformRunInput} CartDeliveryOptionsTransformRunInput
 * @typedef {import("../generated/api").CartDeliveryOptionsTransformRunResult} CartDeliveryOptionsTransformRunResult
 */

/** Settings stored as JSON in the customization's metafield. */
const DEFAULT_CONFIG = {
  // Total product weight per shipment, in kilograms, above which the options are hidden.
  maxWeightKg: 30,
  // Matched case-insensitively anywhere in the delivery option title.
  optionTitles: ["Express", "Ekspres"],
};

/** Kilograms per unit of Shopify's WeightUnit values. */
const KG_PER_UNIT = { GRAMS: 0.001, KILOGRAMS: 1, OUNCES: 0.028349523125, POUNDS: 0.45359237 };

/**
 * Product weight of one delivery group. Variants without a weight count as 0,
 * so missing data never hides an option by itself.
 * @param {CartDeliveryOptionsTransformRunInput["cart"]["deliveryGroups"][number]} group
 */
function groupWeightKg(group) {
  return group.cartLines.reduce((sum, line) => {
    if (line.merchandise.__typename !== "ProductVariant") return sum;
    const { weight, weightUnit } = line.merchandise;
    return sum + (weight ?? 0) * (KG_PER_UNIT[weightUnit] ?? 0) * line.quantity;
  }, 0);
}

/**
 * @param {CartDeliveryOptionsTransformRunInput} input
 * @returns {CartDeliveryOptionsTransformRunResult}
 */
export function cartDeliveryOptionsTransformRun(input) {
  const config = { ...DEFAULT_CONFIG, ...input.deliveryCustomization?.metafield?.jsonValue };
  const titles = config.optionTitles.map((title) => title.toLowerCase());

  // Each delivery group is a separate shipment, so weigh them one by one.
  const operations = input.cart.deliveryGroups
    .filter((group) => groupWeightKg(group) > config.maxWeightKg)
    .flatMap((group) => group.deliveryOptions)
    .filter((option) => titles.some((title) => (option.title ?? "").toLowerCase().includes(title)))
    .map((option) => ({ deliveryOptionHide: { deliveryOptionHandle: option.handle } }));

  return { operations };
}