add layer 2-3-4 calculations

src/pages/dashboard/Content/Tariffs/cartCalcs.ts

@@ -1,5 +1,5 @@
 import { Cart } from "../../../../model/cart";
-import { Tariffs } from "../../../../model/tariff";
+import { SERVICE_LIST, Tariffs } from "../../../../model/tariff";
 import { User } from "../../../../model/user";
 
 
@@ -7,7 +7,7 @@ export function calcCartData(
     user: User,
     cartItems: Cart.CartItem[],
     discounts: Cart.AnyDiscount[],
-    privileges: Cart.Privilege[],
+    privileges: Tariffs.Privilege[],
     promocode?: Cart.Promocode,
 ): Cart.CartTotal {
     const cartTotal: Cart.CartTotal = {
@@ -20,6 +20,9 @@ export function calcCartData(
         },
     };
 
+    debugger;
+
+    // TODO layer 0
     for (const discount of discounts) {
         if (discount.conditionType !== "userType" || discount.condition.userType !== user.Type) continue;
 
@@ -35,6 +38,7 @@ export function calcCartData(
         return cartTotal;
     }
 
+    // TODO layer 1
     if (promocode) {
         for (const discount of discounts) {
             if (discount.conditionType !== "user" || discount.condition.user !== user.ID || discount.condition.coupon !== promocode.name) continue;
@@ -65,18 +69,7 @@ export function calcCartData(
 
         const tariff = cartItem.item;
 
-        const discountsForTariffService = discounts.filter((discount): discount is Cart.ServiceDiscount => (
-            discount.conditionType === "service" && discount.condition.service.id === tariff.service
-        ));
-        const maxValueServiceDiscount = discountsForTariffService.reduce((prev, current) => {
-            return current.condition.service.value > prev.condition.service.value ? current : prev;
-        });
-
-        cartItemTotal.totalPrice *= maxValueServiceDiscount.target.factor;
-        cartItemTotal.envolvedDiscounts.push(maxValueServiceDiscount._id);
-
-
-        const maxPrivilegeDiscount = findMaxApplicablePrivilegeDiscount(tariff, discounts);
+        const maxPrivilegeDiscount = findMaxApplicablePrivilegeDiscount(discounts, tariff);
         if (maxPrivilegeDiscount) {
             maxPrivilegeDiscount.target.products.forEach(product => {
                 if (product.productId === tariff.id) { // TODO productId - ид продукта(тариф или пакет тарифов) или привилегии? Если второе, то откуда берется привилегия?
@@ -87,29 +80,91 @@ export function calcCartData(
         }
 
         cartTotal.items.push(cartItemTotal);
-        cartTotal.totalPrice += cartItemTotal.totalPrice;
         cartTotal.priceByService[tariff.service] += cartItemTotal.totalPrice;
     }
 
+    // layer 2
+    SERVICE_LIST.forEach(service => {
+        const serviceDiscount = findMaxServiceDiscount(service, discounts, cartTotal);
+        if (serviceDiscount) cartTotal.priceByService[service] *= serviceDiscount.target.factor;
+
+        cartTotal.totalPrice += cartTotal.priceByService[service];
+    });
+
+    // layer 3
+    const cartPurchasesAmountDiscount = findMaxCartPurchasesAmountDiscount(discounts, cartTotal);
+    if (cartPurchasesAmountDiscount) cartTotal.totalPrice *= cartPurchasesAmountDiscount.factor;
+
+    // layer 4
+    const totalPurchasesAmountDiscount = findMaxPurchasesAmountDiscount(discounts, user);
+    if (totalPurchasesAmountDiscount) cartTotal.totalPrice *= totalPurchasesAmountDiscount.factor;
+
     return cartTotal;
 }
 
-function findMaxApplicablePrivilegeDiscount(
-    tariff: Tariffs.Tariff,
-    discounts: Cart.AnyDiscount[],
-): Cart.PrivilegeDiscount | null {
-    const applicablePrivilegeDiscounts = discounts.filter((discount): discount is Cart.PrivilegeDiscount => {
+function findMaxApplicablePrivilegeDiscount(discounts: Cart.AnyDiscount[], tariff: Tariffs.Tariff): Cart.PrivilegeDiscount | null {
+    const applicableDiscounts = discounts.filter((discount): discount is Cart.PrivilegeDiscount => {
         return discount.conditionType === "privilege" && tariff.amount >= discount.condition.privilege.value;
     });
 
-    if (!applicablePrivilegeDiscounts.length) return null;
+    if (!applicableDiscounts.length) return null;
 
-    const maxValueDiscount = applicablePrivilegeDiscounts.reduce(
+    const maxValueDiscount = applicableDiscounts.reduce(
         (prev, current) => current.condition.privilege.value > prev.condition.privilege.value ? current : prev
     );
 
     return maxValueDiscount;
-};
+}
+
+function findMaxCartPurchasesAmountDiscount(discounts: Cart.AnyDiscount[], cartTotal: Cart.CartTotal): Cart.CartPurchasesAmountDiscount | null {
+    const applicableDiscounts = discounts.filter((discount): discount is Cart.CartPurchasesAmountDiscount => {
+        return discount.conditionType === "cartPurchasesAmount" && discount.condition.cartPurchasesAmount >= cartTotal.totalPrice;
+    });
+
+    if (!applicableDiscounts.length) return null;
+
+    const maxValueDiscount = applicableDiscounts.reduce(
+        (prev, current) => current.condition.cartPurchasesAmount > prev.condition.cartPurchasesAmount ? current : prev
+    );
+
+    return maxValueDiscount;
+}
+
+function findMaxPurchasesAmountDiscount(discounts: Cart.AnyDiscount[], user: User): Cart.PurchasesAmountDiscount | null {
+    const applicableDiscounts = discounts.filter((discount): discount is Cart.PurchasesAmountDiscount => {
+        return discount.conditionType === "purchasesAmount" && discount.condition.purchasesAmount >= user.PurchasesAmount;
+    });
+
+    if (!applicableDiscounts.length) return null;
+
+    const maxValueDiscount = applicableDiscounts.reduce(
+        (prev, current) => current.condition.purchasesAmount > prev.condition.purchasesAmount ? current : prev
+    );
+
+    return maxValueDiscount;
+}
+
+function findMaxServiceDiscount(
+    service: Tariffs.ServiceType,
+    discounts: Cart.AnyDiscount[],
+    cartTotal: Cart.CartTotal
+): Cart.ServiceDiscount | null {
+    const discountsForTariffService = discounts.filter((discount): discount is Cart.ServiceDiscount => {
+        return (
+            discount.conditionType === "service" &&
+            discount.condition.service.id === service &&
+            discount.condition.service.value >= cartTotal.priceByService[service]
+        );
+    });
+
+    if (!discountsForTariffService.length) return null;
+
+    const maxValueDiscount = discountsForTariffService.reduce((prev, current) => {
+        return current.condition.service.value > prev.condition.service.value ? current : prev;
+    });
+
+    return maxValueDiscount;
+}
 
 function calcCartItemWithPromocode(
     cartItem: Cart.CartItem,
@@ -142,9 +197,7 @@ function calcCartItemWithPromocode(
     return cartItemTotal;
 }
 
-export function packTariffs(tariffs: Tariffs.Tariff[]): Tariffs.Package {
-    const id = Date.now().toString(); // TODO actual id
-    const name = "Package"; // TODO actual name
+export function packTariffs(tariffs: Tariffs.Tariff[], id: string, name: string): Tariffs.Package {
     const services: Tariffs.ServiceType[] = [];
     tariffs.forEach(tariff => {
         if (!services.includes(tariff.service)) services.push(tariff.service);