36 lines
1.1 KiB
TypeScript
36 lines
1.1 KiB
TypeScript
import { CartData, Discount } from "../../model";
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import { findDiscountFactor } from "./findDiscountFactor";
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export function applyCartDiscount(
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cartData: CartData,
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discounts: Discount[],
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) {
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const cartDiscount = findCartDiscount(cartData.priceAfterDiscounts, discounts);
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if (!cartDiscount) return;
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cartData.priceAfterDiscounts *= findDiscountFactor(cartDiscount);
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cartData.allAppliedDiscounts.push(cartDiscount);
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cartData.appliedCartPurchasesDiscount = cartDiscount;
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}
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export function findCartDiscount(
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cartPurchasesAmount: number,
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discounts: Discount[],
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): Discount | null {
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const applicableDiscounts = discounts.filter(discount => {
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return (
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discount.Layer === 3 &&
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cartPurchasesAmount >= discount.Condition.CartPurchasesAmount
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);
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});
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if (!applicableDiscounts.length) return null;
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const maxValueDiscount = applicableDiscounts.reduce((prev, current) => {
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return current.Condition.CartPurchasesAmount > prev.Condition.CartPurchasesAmount ? current : prev;
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});
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return maxValueDiscount;
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}
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