private readonly ILogCleaner _self; // for unit testing private calls by the instance to itself
/// <summary>
/// </summary>
public LogCleaner()
{
_self = this;
_dateTimeProvider = new UniversalDateTime();
DirectoryCleaner = new DirectoryCleaner(new FileSystemOperations(new FileSystem()), _dateTimeProvider);
TaskRunner = new TaskRunner();
}
/// <summary>
/// call this to explicitly trigger a cleaning of the log directory
/// </summary>
public Task Cleanup()
{
var now = _dateTimeProvider.Now;
var cutoffDate = MaxFileAgeDays.HasValue ? (DateTime?)now.AddDays(-MaxFileAgeDays.Value) : null;
return(TaskRunner.Run(() => DirectoryCleaner.Clean(BasePath, FileExtension, cutoffDate, MaxDirectorySize), WaitType));
}
/// <summary>
/// true if the next logging call will trigger a cleaning of the log directory
/// </summary>
public bool IsDueForCleaning(DateTime now)
{
if (!LastCleaning.HasValue)
{
LastCleaning = DirectoryCleaner.GetLastCleaningTime(BasePath) ?? DateTime.MinValue;
}
return((now - LastCleaning.Value).TotalMinutes >= PeriodMinutes);
}
/// <summary>
/// meant for internal use only
/// </summary>
public void TryCleanup()
{
if (!(MaxFileAgeDays.HasValue || MaxDirectorySize.HasValue))
{
return;
}
if (string.IsNullOrWhiteSpace(FileExtension))
{
return;
}
var now = _dateTimeProvider.Now;
if (!_self.IsDueForCleaning(now))
{
return;
}
LastCleaning = DirectoryCleaner.UpdateLastCleaningTime(BasePath);
_self.Cleanup();
}
/// <summary>
/// Infers the file extension from the given log file
/// </summary>
public void InferFileExtension(string path)
{
FileExtension = DirectoryCleaner.GetFileExtension(path);
}