public (CounterValueModel model, Version version) Load(IEventstore es, CounterValue query)
{
var counters = es.Replay(typeof(Incremented), typeof(Decremented)).Aggregate(
new Dictionary <string, int>(),
(dict, e) => {
switch (e)
{
case Incremented i:
if (dict.ContainsKey(i.CounterId) is false)
{
dict[i.CounterId] = 0;
}
dict[i.CounterId] += 1;
break;
case Decremented d:
dict[d.CounterId] -= 1;
break;
}
return(dict);
});
var model = new CounterValueModel();
counters.TryGetValue(query.CounterId, out model.Value);
return(model, null);
}
public CounterValue.Result Project(CounterValue query, CounterValueModel model)
=> new CounterValue.Result
{
CounterId = query.CounterId, Value = model.Value
};
