Managing State in Flutter Using BLoC Pattern/

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Solution: Implementing the Shopping Cart

Solution: Implementing the Shopping Cart

View the solution of implementing the shopping cart functionality.

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Implementing ShoppingCartCubit

To implement the ShoppingCartCubit, we can use the functions provided to us by the ShoppingCart model.

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// inside lib\cubits\shopping_cart\shopping_cart_cubit.dart
void addItemToCart(ShoppingCartItem item) {
  ShoppingCart updatedCart = state.shoppingCart.copyWith();
  updatedCart.addItem(item);
  emit(ShoppingCartUpdated(updatedCart));
}
void removeItemFromCart(ShoppingCartItem item) {
  ShoppingCart updatedCart = state.shoppingCart.copyWith();
  updatedCart.removeItem(item);
  emit(ShoppingCartUpdated(updatedCart));
}
void clearCart() {
  ShoppingCart updatedCart = state.shoppingCart.copyWith();
  updatedCart.clear();
  emit(ShoppingCartUpdated(updatedCart));
}

In all of these functions, we use the respective functions provided to us in the ShoppingCart model. Therefore, for addItemToCart(), we use the addItem() function (line 4); for removeItemFromCart(), we use the removeItem() function (line 10); and for clearCart(), we use the clear() function (line 16). ...

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