public void Add(string filePath, string identifier)
{
if (_filePathsToMonitor.ContainsKey(filePath))
{
return; // file is already monitored
}
lock (_syncRoot)
{
_filePathsToMonitor.Add(filePath, identifier);
}
string folder = Path.GetDirectoryName(filePath);
if (folder != null)
{
lock (_syncRoot)
{
if (_fileWatchers.ContainsKey(folder))
{
return; // directory is already monitored
}
var fileSystemWatcher = new FileWatcher(folder, _filter, _throttle);
SubscribeToFileChanges(fileSystemWatcher);
if (IsMonitoring)
{
fileSystemWatcher.StartMonitoring();
}
_fileWatchers.Add(folder, fileSystemWatcher);
}
SubscribeToEvents();
}
}
private void SubscribeToFileChanges(FileWatcher fileWatcher)
{
IDisposable subscription = fileWatcher.Subscribe(FileHasChanged, FileMonitorGotAnError);
_subscriptions.Add(fileWatcher.Path, subscription);
}
