public override async Task <AggregateUserActivityResponse> AggregateUserActivity(AggregateUserActivityRequest request, ServerCallContext context)
{
var headers = context.RequestHeaders.SelectCustom();
var accounts = await dataFetcher.GetAccounts(headers, request.UserId);
var accountsIds = accounts.Select(a => a.Id).ToArray();
var data = new UserActivityRaportData
{
From = request.TimestampFrom.ToDateTime(),
To = request.TimestampTo.ToDateTime(),
Granularity = request.Granularity,
Accounts = accounts,
UserId = request.UserId
};
var parallelTasks = new List <Task>();
parallelTasks.Add(Task.Run(async() => data.Transactions = await dataFetcher.GetAccountsTransactions(headers, accountsIds, request.TimestampFrom, request.TimestampTo)));
parallelTasks.Add(Task.Run(async() =>
{
var paymentsAndLoans = await dataFetcher.GetPaymentsWithLoans(headers, accountsIds);
data.Payments = paymentsAndLoans.Payments;
data.Loans = paymentsAndLoans.Loans;
}));
parallelTasks.Add(Task.Run(async() => data.Cards = await dataFetcher.GetCards(headers, accountsIds)));
await Task.WhenAll(parallelTasks);
var report = ReportGenerator.AggregateUserActivity(data);
return(new AggregateUserActivityResponse {
Report = report
});
}
public static string AggregateUserActivity(UserActivityRaportData data)
{
var withTimestamps = data.Transactions.Select(t => new TransactionWithTimestamp {
Timestamp = t.Timestamp.ToDateTime(), Transaction = t
});
var accountsPortion = data.Accounts.SelectMany(a => AggregateUserAccountsTransactions(a, withTimestamps, data.Granularity)).ToArray();
var cardsTransactions = withTimestamps.Where(t => t.Transaction.CardId != null);
var cardsPortion = data.Cards.SelectMany(c => AggregateUserCardTransactions(c, cardsTransactions, data.Granularity)).ToArray();
var paymentsTransactions = withTimestamps.Where(t => t.Transaction.PaymentId != null);
var paymentsPortion = data.Payments.SelectMany(p => AggregateUserPaymentsTransactions(p, paymentsTransactions, data.Granularity)).ToArray();
var loansPortion = data.Loans.SelectMany(l => AggregateUserLoansTransactions(l, paymentsTransactions, data.Granularity)).ToArray();
return(ReportCsvSerializer.SerializerUserActivityReport(data, accountsPortion, cardsPortion, paymentsPortion, loansPortion));
}
public static string SerializerUserActivityReport(UserActivityRaportData data,
UserReportPortion[] accountsPortions,
UserReportPortion[] cardsPortions,
UserReportPortion[] paymentsPortions,
UserReportPortion[] loansPortions)
{
var sb = new StringBuilder();
sb.AppendLine($"Raport aktywności użytkownika; {data.UserId}");
sb.AppendLine($"Zakres od; {data.From?.ToString() ?? "-"}");
sb.AppendLine($"Zakres do; {data.To?.ToString() ?? "-"}");
sb.AppendLine($"Granularność; {data.Granularity}");
sb.WriteAccountsData(accountsPortions.ToArray());
sb.WriteCardsData(cardsPortions.ToArray());
sb.WritePaymentsData(paymentsPortions.ToArray());
sb.WriteLoansData(loansPortions.ToArray());
return(sb.ToString());
}
