public bool Overlaps(IRange <T> range)
{
return(this.Includes(range.Start) || this.Includes(range.End) || range.Includes(this.Start));
}
public int Write(CandleEvent[] candleEvents, string filePath, CancellationToken ct, IRange <NodaTime.Instant> allowedDateRange)
{
int eventsWrittenCount = 0;
Boolean newfile = false;
NodaTime.Instant lastTimestamp;
string dateTimePattern = "yyyy-MM-ddTHH:mm:ss";
if (File.Exists(filePath))
{ //if file exists read the time stamp of the last entry
string lastline = File.ReadLines(filePath, Encoding.UTF8).Last();
lastline = lastline.Substring(0, lastline.IndexOf(','));
lastTimestamp = ParseDateTime(lastline, dateTimePattern);
}
else
{ //if the file doesn't exist create one and add the header with information about file content
newfile = true;
string dirPath = Path.GetDirectoryName(filePath);
Directory.CreateDirectory(dirPath);
using (System.IO.StreamWriter file = new System.IO.StreamWriter(filePath, false))
{
file.Write("<date time>,<open price>,<high price>,<low price>,<close price>");
}
lastTimestamp = NodaTime.Instant.FromUnixTimeTicks(0);
}
string newLine = Environment.NewLine;
using (System.IO.StreamWriter file = new System.IO.StreamWriter(filePath, true))
{
foreach (var ce in candleEvents) //save all candle events to file
{
if (ct.IsCancellationRequested)
{
break; //if cancelled stop the loop
}
var candleTime = NodaTime.Instant.FromUnixTimeTicks(ce.Date);
if (candleTime > lastTimestamp && allowedDateRange.Includes(candleTime))
{
// the current event from candleEvents has later date then the last event
// already saved to a file AND
// the date is included in the allowedDateRange
string candleValue = ce.Value.ToString();
candleValue = candleValue.Replace(" ", "");
file.Write("{0}{1},{2}",
newLine,
candleTime.ToDateTime().ToString(dateTimePattern),
candleValue);
file.Flush();
eventsWrittenCount++;
lastTimestamp = candleTime;
}
}
}
if (ct.IsCancellationRequested)
{
if (newfile)
{
File.Delete(filePath); //if cancellation and file didn't exist before delete it entirely
}
else //if cancellation and file existed before delete appended lines
{
string [] filecontent = File.ReadAllLines(filePath);
Array.Resize(ref filecontent, filecontent.Length - eventsWrittenCount);
File.Delete(filePath); //delete file
File.WriteAllLines(filePath, filecontent); //recreate file with lines before program action
}
}
_log.DebugFormat("Finished writing to series, added: {0} events", eventsWrittenCount);
return(eventsWrittenCount);
}