/// <summary>
/// Waits for an SMS activity to begin, then handles it.
/// </summary>
public async Task WaitSmsAsync(ILambdaContext context)
{
var startTime = DateTime.Now;
var timeAvailable = TimeSpan.FromMinutes(4);
using (var client = StepFunctionClientFactory.GetClient())
{
TimeSpan timeLeft;
do
{
context.Logger.LogLine("Polling GetActivityTask");
var arn = ServerlessConfig.WaitSmsResponseActivityArn;
var req = new GetActivityTaskRequest {
ActivityArn = arn
};
var result = await client.GetActivityTaskAsync(req).ConfigureAwait(false);
if (result.Input != null && result.TaskToken != null)
{
context.Logger.LogLine("Received token");
// get the current state for the activity
var state = JsonConvert.DeserializeObject <State>(result.Input);
// save the task token to the survey response and persist the current state
// so we can restore it later.
var surveyResponse = await _DataAccess.GetSurveyResponseAsync(Sanitizer.HashPhoneNumber(state.PhoneNumber))
.ConfigureAwait(false);
surveyResponse.TaskToken = result.TaskToken;
surveyResponse.SavedState = state;
await _DataAccess.SaveSurveyResponeAsync(surveyResponse).ConfigureAwait(false);
// ask the question -- do this last so that the current state is persisted with the task token
await AskQuestionAsync(state.PhoneNumber, Survey.GetQuestion(state.Question)).ConfigureAwait(false);
}
timeLeft = timeAvailable - (DateTime.Now - startTime);
} while (timeLeft.TotalMilliseconds >= 65000);
context.Logger.LogLine("Polling loop terminated");
}
}
