/// <summary>
/// Parses the connection string and resolves the filename by using rolling period.
/// </summary>
/// <param name="connectionString">Connection string to bre parsed</param>
/// <param name="period">Period</param>
/// <param name="date">Date</param>
/// <returns></returns>
public static string GetFilename(string connectionString, RollingPeriod period, DateTime date)
{
if (period == RollingPeriod.Never)
{
return(connectionString);
}
var c = ConnectionStringParser.Parse(connectionString);
var fullpath = c["filename"];
var filename = Path.GetFileName(fullpath);
var extension = Path.GetExtension(filename);
var file = Path.GetFileNameWithoutExtension(filename);
var folderPart = Path.GetDirectoryName(fullpath) ?? ("." + Path.DirectorySeparatorChar);
var dateFormat = "yyyy-MM-dd-HHmm";
switch (period)
{
case RollingPeriod.HalfHour:
case RollingPeriod.Quarterly:
var itv = period == RollingPeriod.Quarterly ? 15 : 30;
var dateMinutes = date.Minute / itv * itv;
date = date.AddMinutes(-date.Minute).AddMinutes(dateMinutes);
break;
case RollingPeriod.Weekly:
case RollingPeriod.Daily:
dateFormat = "yyyy-MM-dd";
break;
case RollingPeriod.Monthly:
dateFormat = "yyyy-MM";
break;
case RollingPeriod.Hourly:
dateFormat = "yyyy-MM-dd-HH";
break;
default:
throw new InvalidOperationException($"period cannot be parsed: {period}");
}
file = file + "_" + date.ToString(dateFormat);
c["filename"] = Path.Combine(folderPart, $"{file}{extension}");
return(ConnectionStringParser.Create(c));
}
