public override async Task <AggregateOverallResponse> AggregateOverall(AggregateOverallRequest request, ServerCallContext context)
{
var headers = context.RequestHeaders.SelectCustom();
Transaction[] transactions;
switch (request.Subject)
{
case ReportSubject.Cards:
transactions = await dataFetcher.GetCardsTransactions(headers, request.TimestampFrom, request.TimestampTo);
break;
case ReportSubject.Loans:
transactions = await dataFetcher.GetLoansTransactions(headers, request.TimestampFrom, request.TimestampTo);
break;
case ReportSubject.Payments:
transactions = await dataFetcher.GetPaymentsTransactions(headers, request.TimestampFrom, request.TimestampTo);
break;
case ReportSubject.Transactions:
transactions = await dataFetcher.GetTransactions(headers, request.TimestampFrom, request.TimestampTo);
break;
default:
throw new InvalidOperationException("Unknown subject of report.");
}
var data = new OverallReportData
{
From = request.TimestampFrom.ToDateTime(),
To = request.TimestampTo.ToDateTime(),
Granularity = request.Granularity,
Subject = request.Subject,
Aggregations = request.Aggregations.ToArray(),
Transactions = transactions
};
var report = ReportGenerator.AggregateOverall(data);
return(new AggregateOverallResponse {
Report = report
});
}
public static string AggregateOverall(OverallReportData data)
{
var withTimestamps = data.Transactions.Select(t => new TransactionWithTimestamp {
Timestamp = t.Timestamp.ToDateTime(), Transaction = t
});
var periods = GroupByPeriods(data.Granularity, withTimestamps);
var portions = new List <OverallReportPortion>();
foreach (var period in periods)
{
foreach (var aggregation in data.Aggregations)
{
var value = Aggregate(period, aggregation);
portions.Add(new OverallReportPortion {
Period = period.Key, Value = value, Aggregation = aggregation
});
}
}
return(ReportCsvSerializer.SerializerOverallReport(data, portions.ToArray()));
}
public static string SerializerOverallReport(OverallReportData data, OverallReportPortion[] portions)
{
var sb = new StringBuilder();
sb.AppendLine($"Raport całościowy dla; {data.Subject}");
sb.AppendLine($"Zakres od; {data.From?.ToString() ?? "-"}");
sb.AppendLine($"Zakres do; {data.To?.ToString() ?? "-"}");
sb.AppendLine($"Granularność; {data.Granularity}");
var groupedPortions = portions.GroupBy(p => p.Period);
var ordered = groupedPortions.OrderBy(p => p.Key);
foreach (var portion in ordered)
{
sb.AppendLine(portion.Key);
foreach (var aggregation in portion)
{
sb.WriteAggragation(portion.Key, aggregation.Value, aggregation.Aggregation);
}
}
return(sb.ToString());
}
