feat: cart discount

package.json

@@ -1,5 +1,5 @@
 {
-  "version": "0.26.3",
+  "version": "0.27.0",
   "license": "MIT",
   "main": "dist/index.js",
   "typings": "dist/index.d.ts",

src/modules/commerce/cart/index.ts

@@ -1,6 +1,11 @@
 import { ClientType } from '../../../index';
-import { ADD_TO_CART_MUTATION, CLEAR_CART_MUTATION, GET_CART_QUERY } from '../../../mutations';
-import { CartData, CartItemData, CartItemInput } from '../../../types/commerce';
+import {
+  ADD_TO_CART_MUTATION,
+  CLEAR_CART_MUTATION,
+  GET_CART_QUERY,
+  CART_DISCOUNT_CODES_UPDATE
+} from '../../../mutations';
+import { CartData, CartDataDiscount, CartItemData, CartItemInput } from '../../../types/commerce';
 
 export class Cart {
   constructor(protected client: ClientType) { }
@@ -10,7 +15,7 @@ export class Cart {
       mutation: ADD_TO_CART_MUTATION,
       variables: { input },
     });
-  
+
     return response.data;
   }
 
@@ -29,4 +34,13 @@ export class Cart {
 
     return response.data;
   }
-}
+
+  public async updateDiscountCodes(discountCodes: string[]): Promise<CartDataDiscount> {
+    const response = await this.client.mutate({
+      mutation: CART_DISCOUNT_CODES_UPDATE,
+      variables: { discountCodes },
+    });
+
+    return response.data;
+  }
+}

src/mutations/commerce.mutation.ts

@@ -97,3 +97,19 @@ export const GET_CART_QUERY = gql`
     }
   }
 `;
+
+export const CART_DISCOUNT_CODES_UPDATE = gql`
+  mutation($discountCodes: [String!]!) {
+    cartDiscountCodesUpdate(discountCodes: $discountCodes) {
+      id
+      total
+      items {
+        id
+        name
+        price
+        quantity
+        attributes
+      }
+    }
+  }
+`;

src/types/commerce.ts

@@ -105,6 +105,20 @@ export interface CartData {
   };
 }
 
+export interface CartDataDiscount {
+  cartDiscountCodesUpdate: {
+    id: string;
+    total: number;
+    items: {
+      id: number;
+      name: string;
+      price: number;
+      quantity: number;
+      attributes: string;
+    }[];
+  };
+}
+
 export interface OrderItemInput {
   input: {
     cartId: 'default';

test/cart.test.ts

@@ -14,4 +14,33 @@ describe('Test the Commerce', () => {
         expect(getCart.cart.id).toBeDefined();
         expect(getCart.cart.items).toBeInstanceOf(Array);
     });
+
+    it('updates discount codes in cart', async () => {
+        const client = getClient();
+        const cart = client.cart;
+
+        // Test adding discount codes
+        const updatedCart = await cart.updateDiscountCodes(['TEST_CODE']);
+        expect(updatedCart).toBeDefined();
+        expect(updatedCart.cartDiscountCodesUpdate.id).toBeDefined();
+        expect(updatedCart.cartDiscountCodesUpdate.items).toBeInstanceOf(Array);
+
+        // Optional: Test clearing discount codes
+        const clearedCart = await cart.updateDiscountCodes([]);
+        expect(clearedCart).toBeDefined();
+        expect(clearedCart.cartDiscountCodesUpdate.id).toBeDefined();
+    });
+
+    // Optional: Test error case
+    it('handles invalid discount codes', async () => {
+        const client = getClient();
+        const cart = client.cart;
+
+        try {
+            await cart.updateDiscountCodes(['INVALID_CODE']);
+        } catch (error) {
+            expect(error).toBeDefined();
+            // Add more specific error checks based on your API's error response
+        }
+    });
 });