public void Next()
{
string line = this.stream.ReadLine();
this.currentLineNumber++;
if (String.IsNullOrEmpty(line))
{
this.currentLine = null;
return;
}
string[] values = line.Split(';');
DateTimeOffset dt;
decimal bid;
if (!DateTimeOffset.TryParse(values[0], out dt))
{
return;
}
if (!Decimal.TryParse(values[1], NumberStyles.AllowDecimalPoint, CultureInfo.InvariantCulture, out bid))
{
return;
}
if (this.currentLine is null)
{
this.currentLine = new MarketDataDTO()
{
DateTime = dt,
Bid = bid,
};
}
else
{
this.currentLine.DateTime = dt;
this.currentLine.Bid = bid;
}
}
static void Main(string[] args)
{
List <IterableFileReader> streams = new List <IterableFileReader>();
streams.Add(new IterableFileReader("FILE1.csv"));
streams.Add(new IterableFileReader("FILE2.csv"));
streams.Add(new IterableFileReader("FILE3.csv"));
Dictionary <IterableFileReader, MarketDataDTO> streamsData = new Dictionary <IterableFileReader, MarketDataDTO>();
while (true)
{
if (streamsData.Count != streams.Count)
{
foreach (IterableFileReader stream in streams)
{
var line = stream.CurrentLine();
if (line is null)
{
stream.Next();
}
stream.Next();
line = stream.CurrentLine();
if (!streamsData.ContainsKey(stream))
{
streamsData.Add(stream, new MarketDataDTO
{
DateTime = line.DateTime,
Bid = line.Bid,
});
}
}
}
if (streamsData.Count == streams.Count)
{
List <KeyValuePair <IterableFileReader, MarketDataDTO> > list = streamsData.OrderByDescending(s => s.Value.DateTime).ToList();
KeyValuePair <IterableFileReader, MarketDataDTO> first = list.First();
var nextFirstLine = first.Key.CurrentLine();
if (nextFirstLine != null && nextFirstLine.DateTime == first.Value.DateTime)
{
first.Key.Next();
}
var dateTime = first.Value.DateTime;
list.RemoveAt(0);
foreach (var r in list)
{
var stream = r.Key;
MarketDataDTO currrentDataValue = r.Value;
DateTimeOffset currentDate = currrentDataValue.DateTime;
decimal currentBid = currrentDataValue.Bid;
if (currentDate > first.Value.DateTime)
{
continue; // если дата в стриме, больше чем самая большая дата, не обновляемся
}
var nextLine = stream.CurrentLine();
if (nextLine != null && currentDate == nextLine.DateTime)
{
stream.Next();
nextLine = stream.CurrentLine();
if (nextLine == null || nextLine.DateTime > first.Value.DateTime)
{
continue;
}
currrentDataValue.DateTime = nextLine.DateTime;
currrentDataValue.Bid = nextLine.Bid;
}
else
{
var nextFirst = first.Key.CurrentLine();
if (nextFirst != null && nextLine.DateTime > nextFirst.DateTime)
{
first.Value.DateTime = nextFirst.DateTime;
first.Value.Bid = nextFirst.Bid;
}
else
{
if (nextLine != null)
{
currrentDataValue.DateTime = nextLine.DateTime;
currrentDataValue.Bid = nextLine.Bid;
}
}
}
}
if (isAllStreamsEnded(streamsData))
{
foreach (var s in streamsData)
{
var stream = s.Key;
var val = s.Value;
var nextFirst = stream.CurrentLine();
Console.WriteLine("Next: {0}, {1}; Current: {2}, {3}", nextFirst?.DateTime, nextFirst?.Bid, val.DateTime, val.Bid);
}
Console.WriteLine("ended");
}
}
}
