// add event id to event list
public async Task AddAnEvent(SummaryEventInfo eventInfo)
{
Console.WriteLine($"** AggregatorGrain AddAnEvent() for event id {eventInfo.id}, title {eventInfo.title}");
// ensure allevent List is constructed ok
if (State.allevents == null)
{
State.allevents = new List <SummaryEventInfo>();
}
// check to see if event already exists, and if so, removed, before inserting new event info
int index = State.allevents.FindIndex(item => item.id == eventInfo.id);
if (index >= 0)
{
State.allevents.RemoveAt(index);
}
// add this event key to our active list
State.allevents.Add(eventInfo);
Console.WriteLine($"** AggregatorGrain AddAnEvent() about to write WriteStateAsync for new event id {eventInfo.id}");
await base.WriteStateAsync();
return;
}
// create / update an event
// the system doesn't really distinguish between the two, just to keep the logic simple
// scenarios include changing the start or end date, changing the list of topics for that event, etc
public async Task Update(string title, string type, string start, string end, TopicApiData[] topics)
{
string id = this.GetPrimaryKeyString(); // rmember - the grain key is the event id
Console.WriteLine($"** EventGrain Update()for event id = {id}, with title {title}");
// update interal grain state
State.title = title;
State.type = type;
State.start = start;
State.end = end;
State.topics = topics;
State.feedback = new List <FeedbackGrainState>(); // lets clear all feedback, just to keep things simple
Console.WriteLine($"** EventGrain Update() about to write WriteStateAsync");
await base.WriteStateAsync();
// update aggregator about this new event
SummaryEventInfo eventInfo = new SummaryEventInfo();
eventInfo.id = id;
eventInfo.title = title;
eventInfo.start = start;
eventInfo.end = end;
IAggregatorGrain aggregator = GrainFactory.GetGrain <IAggregatorGrain>(Guid.Empty); // the aggregator grain is a singleton - Guid.Empty is convention to indicate this
//await aggregator.DeleteAnEvent(id);
await aggregator.AddAnEvent(eventInfo);
return;
}
