/// <summary>
/// Create and open a new file logger for the given hub.
/// </summary>
/// <param name="hub">The hub to log messages from.</param>
/// <param name="path">The path to the folder to place log files in.</param>
/// <param name="saveOld">If old log files should be kept.</param>
public FileLogger(EventHub hub, string path = "./logs", bool saveOld = true)
: base(hub)
{
string filename = Path.Combine(path, "latest.log");
var fileInfo = new FileInfo(filename);
// Create directory, if needed
if (fileInfo == null || !fileInfo.Exists)
{
Directory.CreateDirectory(Path.GetDirectoryName(filename) ?? path);
fileInfo = new FileInfo(filename);
}
// Save old file, if needed
if (saveOld && fileInfo.Exists)
{
fileInfo.MoveTo(fileInfo.FullName.Replace("latest", fileInfo.CreationTime.ToString("yyMMdd_HHmmss")));
}
// Open the file
_writer = new StreamWriter(File.Open(filename, FileMode.Create, FileAccess.Write, FileShare.Read),
encoding: Encoding.UTF8, leaveOpen: false);
FilePath = (_writer.BaseStream as FileStream) !.Name;
// Write initial file contents
_writer.Write($"Log opened - {DateTime.Now.ToString("G")}\n\n");
_writer.Flush();
}
protected LogListener(EventHub hub)
{
Subscription = hub.Subscribe <LogEvent>(HandleLogEvent);
}