public async Task ReceiveAsync(IContext context)
{
switch (context.Message)
{
case Started _:
await persistence.RecoverStateAsync();
break;
case GetItems msg:
context.Respond(new ShoppingListDto
{
Items = State.Items
.Skip((msg.PageNumber - 1) * msg.PageSize)
.Take(msg.PageSize)
.Select(i => new ShoppingListItemDto
{
Name = i.Name,
Quantity = i.Quantity
}),
Count = State.Items.Count
});
break;
case GetItem msg:
context.Respond(State.GetItemByName(msg.Name));
break;
case AddItem msg:
{
var @event = new ItemAdded(msg.Name, msg.Quantity);
await persistence.PersistEventAsync(@event)
.ContinueWith(t => persistence.PersistSnapshotAsync(State))
.ContinueWith(t => context.Respond(@event));
}
break;
case UpdateQuantity msg:
{
var @event = new QuantityUpdated(msg.Name, msg.Quantity);
await persistence.PersistEventAsync(@event)
.ContinueWith(t => persistence.PersistSnapshotAsync(State))
.ContinueWith(t => context.Respond(@event));
}
break;
case RemoveItem msg:
{
var @event = new ItemRemoved(msg.Name);
await persistence.PersistEventAsync(@event)
.ContinueWith(t => persistence.PersistSnapshotAsync(State))
.ContinueWith(t => context.Respond(@event));
}
break;
}
}
public void OnUpdateQuantity()
{
// alert any observers
QuantityUpdated?.Invoke(_quantity);
}
