public async Task PublishAsync(EventMessage message, CancellationToken ct = default)
{
if (string.IsNullOrWhiteSpace(message.AppId))
{
return;
}
if (string.IsNullOrWhiteSpace(message.Topic))
{
await logStore.LogAsync(message.AppId, Texts.Events_NoTopic, ct);
return;
}
if (string.IsNullOrWhiteSpace(message.TemplateCode) && message.Formatting?.HasSubject() != true)
{
await logStore.LogAsync(message.AppId, Texts.Events_NoSubjectOrTemplateCode, ct);
return;
}
var count = 0;
await foreach (var subscription in GetSubscriptions(message).WithCancellation(ct))
{
if (count == 0)
{
if (!string.IsNullOrWhiteSpace(message.TemplateCode))
{
var template = await templateStore.GetAsync(message.AppId, message.TemplateCode, ct);
if (template != null && !template.IsAutoCreated)
{
message.Formatting = template.Formatting;
if (template.Settings != null && template.Settings.Count > 0)
{
var settings = new NotificationSettings();
settings.OverrideBy(template.Settings);
settings.OverrideBy(message.Settings);
message.Settings = settings;
}
}
}
if (message.Formatting?.HasSubject() != true)
{
await logStore.LogAsync(message.AppId, string.Format(Texts.Template_NoSubject, message.TemplateCode), ct);
return;
}
message.Formatting = message.Formatting.Format(message.Properties);
try
{
await eventStore.InsertAsync(message, ct);
}
catch (UniqueConstraintException)
{
await logStore.LogAsync(message.AppId, Texts.Events_AlreadyProcessed, ct);
break;
}
}
var userEventMessage = CreateUserEventMessage(message, subscription);
await userEventProducer.ProduceAsync(subscription.UserId, userEventMessage);
count++;
}
if (count > 0)
{
var counterMap = CounterMap.ForNotification(ProcessStatus.Attempt, count);
var counterKey = CounterKey.ForEvent(message);
await counters.CollectAsync(counterKey, counterMap, ct);
}
else
{
await logStore.LogAsync(message.AppId, Texts.Events_NoSubscriber, ct);
}
}
private Task StoreCountersAsync(CounterKey key, CounterMap counterValues)
{
return(counters.CollectAsync(key, counterValues));
}
public async Task PublishAsync(EventMessage @event,
CancellationToken ct)
{
using (var activity = Telemetry.Activities.StartActivity("HandleUserEvent"))
{
log.LogInformation("Received event for app {appId} with ID {id} to topic {topic}.",
@event.AppId,
@event.Id,
@event.Topic);
if (string.IsNullOrWhiteSpace(@event.AppId))
{
log.LogInformation("Received invalid event with ID {id} to topic {topic}: No app id found.",
@event.Id,
@event.Topic);
return;
}
if (string.IsNullOrWhiteSpace(@event.Topic))
{
await logStore.LogAsync(@event.AppId, Texts.Events_NoTopic);
return;
}
if (string.IsNullOrWhiteSpace(@event.TemplateCode) && @event.Formatting?.HasSubject() != true)
{
await logStore.LogAsync(@event.AppId, Texts.Events_NoSubjectOrTemplateCode);
return;
}
var count = 0;
await foreach (var subscription in GetSubscriptions(@event, ct))
{
ct.ThrowIfCancellationRequested();
if (count == 0)
{
var templateCode = (string?)null;
if (@event.TemplateVariants?.Count > 0)
{
var random = randomizer.NextDouble();
var propability = 0d;
foreach (var(key, value) in @event.TemplateVariants)
{
propability += value;
if (random <= propability)
{
templateCode = key;
break;
}
}
}
if (string.IsNullOrWhiteSpace(templateCode))
{
templateCode = @event.TemplateCode;
}
if (!string.IsNullOrWhiteSpace(templateCode))
{
var template = await templateStore.GetAsync(@event.AppId, templateCode, ct);
if (template?.IsAutoCreated == false)
{
if (@event.Formatting != null)
{
@event.Formatting = template.Formatting.MergedWith(@event.Formatting);
}
else
{
@event.Formatting = template.Formatting;
}
@event.Settings = ChannelSettings.Merged(template.Settings, @event.Settings);
}
}
if (@event.Formatting?.HasSubject() != true)
{
await logStore.LogAsync(@event.AppId, string.Format(CultureInfo.InvariantCulture, Texts.Template_NoSubject, templateCode));
return;
}
if (@event.Properties != null)
{
@event.Formatting = @event.Formatting.Format(@event.Properties);
}
try
{
await eventStore.InsertAsync(@event, ct);
}
catch (UniqueConstraintException)
{
await logStore.LogAsync(@event.AppId, Texts.Events_AlreadyProcessed);
break;
}
}
var userEventMessage = CreateUserEventMessage(@event, subscription);
if (activity != null)
{
userEventMessage.UserEventActivity = activity.Context;
}
await ProduceAsync(subscription, userEventMessage);
count++;
}
if (count > 0)
{
var counterMap = CounterMap.ForNotification(ProcessStatus.Attempt, count);
var counterKey = CounterKey.ForEvent(@event);
await counters.CollectAsync(counterKey, counterMap, ct);
}
else
{
await logStore.LogAsync(@event.AppId, Texts.Events_NoSubscriber);
}
log.LogInformation("Processed event for app {appId} with ID {id} to topic {topic}.",
@event.AppId,
@event.Id,
@event.Topic);
}
}
private Task StoreCountersAsync(CounterKey key, CounterMap counterValues,
CancellationToken ct)
{
return(counters.CollectAsync(key, counterValues, ct));
}