GetCartForSession.cs

[FunctionName("GetCartForSession")]
public static async Task<IActionResult> RunAsync(
    [HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = "cart/{id}")] HttpRequestMessage req,
    Guid id,
    [DurableClient] IDurableClient client,
    ILogger log)
{
    if (id == Guid.Empty)
    {
        return (ActionResult) new BadRequestObjectResult("The ID is required");
    }
 
    var entityId = new EntityId(nameof(ShoppingCartEntity), id.ToString());
 
    var stateResponse = await client.ReadEntityStateAsync<ShoppingCartEntity>(entityId);
 
    if (!stateResponse.EntityExists)
    {
        return (ActionResult) new NotFoundObjectResult("No cart with this id");
    }
 
    var response = stateResponse.EntityState.GetCartItems();
 
    return (ActionResult) new OkObjectResult(response.Result);
}