Minimum sipariş tutarı zorunluluğu

api_version = "2026-10"

[[extensions]]
name = "Minimum order value"
handle = "minimum-order-value"
type = "function"

  [[extensions.targeting]]
  target = "cart.validations.generate.run"
  input_query = "src/cart_validations_generate_run.graphql"
  export = "cart-validations-generate-run"

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

query CartValidationsGenerateRunInput {
  buyerJourney {
    step
  }
  cart {
    cost {
      subtotalAmount {
        amount
      }
    }
  }
  presentmentCurrencyRate
  validation {
    metafield(namespace: "$app", key: "function-configuration") {
      jsonValue
    }
  }
}

// @ts-check

/**
 * @typedef {import("../generated/api").CartValidationsGenerateRunInput} CartValidationsGenerateRunInput
 * @typedef {import("../generated/api").CartValidationsGenerateRunResult} CartValidationsGenerateRunResult
 */

/** Settings stored as JSON in the validation's metafield. */
const DEFAULT_CONFIG = {
  // In the store's currency; converted to the customer's currency below.
  minimumAmount: 500,
  // {amount} is replaced with the converted minimum.
  message: "The minimum order value is {amount}. Add a few more items to check out.",
};

/** Errors about the cart as a whole show at the top of checkout and on the cart. */
const CART_TARGET = "$.cart";

/** @type {CartValidationsGenerateRunResult} */
const NO_ERRORS = { operations: [] };

/**
 * @param {CartValidationsGenerateRunInput} input
 * @returns {CartValidationsGenerateRunResult}
 */
export function cartValidationsGenerateRun(input) {
  // Let customers keep adding to the cart freely; enforce the rule from checkout on.
  if (input.buyerJourney.step === "CART_INTERACTION") return NO_ERRORS;

  const config = { ...DEFAULT_CONFIG, ...input.validation?.metafield?.jsonValue };
  // The cart is priced in the customer's currency; the minimum is set in the store's.
  const minimum = config.minimumAmount * Number(input.presentmentCurrencyRate);
  const subtotal = Number(input.cart.cost.subtotalAmount.amount);
  if (subtotal >= minimum) return NO_ERRORS;

  const message = config.message.replace("{amount}", minimum.toFixed(2));
  return { operations: [{ validationAdd: { errors: [{ message, target: CART_TARGET }] } }] };
}