CartService

cartService

interface CartService {
  getCartItemsCount(): number;
  getLineItems(): CartLineItem[];
  addLineItem(
    productID: string,
    variantMetaID: string,
    qty: number,
    attributes?: Record<string, string>
  ): Promise<boolean>;
  updateLineItem(lineItemID: string, qty: number): void;
  removeLineItem(lineItemID: string): Promise<void>;
}

const count = cartService.getCartItemsCount();

const items = cartService.getLineItems();

interface CartLineItem {
  id: string;
  quantity: number;
  productID: string;
  product: Product | null;
  variantID: string;
  variant: ProductVariant | null;
  attributes: Record<string, string>;
  totalAmount: number;
  subtotalAmount: number;
  properties: Record<string, string>;
  requiresShipping: boolean;
  weight: number;
  weightUnit: string;
}

const added = await cartService.addLineItem(
  "gid://shopify/Product/123",
  "gid://shopify/ProductVariant/456",
  1,
  { source: "expresso" }
);

cartService.updateLineItem("line-item-id", 2);

await cartService.removeLineItem("line-item-id");