private async Task AddHistoryToSecurities(Dictionary <Symbol, Security?> securities, HistoryFlags historyFlags, CancellationToken ct)
{
List <Security> secs = securities.Values.NotNull().ToList();
var dividendJobs = secs.Where(_ => historyFlags.HasFlag(HistoryFlags.DividendHistory))
.Select(sec => (sec, History.GetTicksAsync <DividendTick>(sec.Symbol, ct))).ToList();
var splitJobs = secs.Where(_ => historyFlags.HasFlag(HistoryFlags.SplitHistory))
.Select(sec => (sec, History.GetTicksAsync <SplitTick>(sec.Symbol, ct))).ToList();
var priceJobs = secs.Where(_ => historyFlags.HasFlag(HistoryFlags.PriceHistory))
.Select(sec => (sec, History.GetTicksAsync <PriceTick>(sec.Symbol, ct))).ToList();
List <Task> tasks = new();
tasks.AddRange(dividendJobs.Select(t => t.Item2));
tasks.AddRange(splitJobs.Select(t => t.Item2));
tasks.AddRange(priceJobs.Select(t => t.Item2));
await TaskExt.WhenAll(tasks).ConfigureAwait(false);
foreach (var(security, task) in dividendJobs)
{
security.DividendHistory = task.Result;
}
foreach (var(security, task) in splitJobs)
{
security.SplitHistory = task.Result;
}
foreach (var(security, task) in priceJobs)
{
security.PriceHistory = task.Result;
security.PriceHistoryBase = GetPriceHistoryBase(task.Result, security);
}
}
private async Task <IEnumerable <JsonElement> > GetElements(HashSet <Symbol> symbols, CancellationToken ct)
{
// start tasks
var tasks = GetUris(symbols).Select(u => MakeRequest(u, ct));
var responses = await TaskExt.WhenAll(tasks).ConfigureAwait(false);
return(responses.SelectMany(x => x).ToList());
}