async Task <GangState <TStateData> > RehydrateAsync <TStateData>(
string gangId, TStateData initial
)
where TStateData : class
{
var data = initial;
var version = 0U;
var keys = await _eventStore.TryGetIndexedKeys(gangId);
foreach (var key in keys)
{
var e = await GetEventAsync(key);
if (++version != e.Audit.Version)
{
throw new GangStateVersionException(version, e.Audit);
}
var method = GangState <TStateData> .ApplyMethods[e.Data.GetType()];
data = method(data, e.Data);
}
return(GangState.Create(data, version));
}
public static async Task <string> TryGetIndexedKeyAsync <TData>(
this IGangStore <TData> store,
object value
)
{
var keys = await store
.TryGetIndexedKeys(value);
return(keys.FirstOrDefault());
}