public void StartWatching(string fileName, string directoryPath)
{
// Read the file time stamp right now; we want to know if it changes between now
// and our ability to get the file watcher in place.
var originalFileTimeStamp = TryGetFileTimeStamp(fileName, directoryPath);
_taskQueue.ScheduleTask(nameof(DeferredFileWatcher) + "." + nameof(StartWatching), () =>
{
_fileWatcher.StartWatching(fileName, directoryPath);
var newFileTimeStamp = TryGetFileTimeStamp(fileName, directoryPath);
if (originalFileTimeStamp != newFileTimeStamp)
{
ChangeType changeType;
if (!originalFileTimeStamp.HasValue && newFileTimeStamp.HasValue)
{
changeType = ChangeType.FileCreated;
}
else if (originalFileTimeStamp.HasValue && !newFileTimeStamp.HasValue)
{
changeType = ChangeType.FileDeleted;
}
else
{
changeType = ChangeType.FileModified;
}
ConventionFileChanged?.Invoke(this,
new ConventionsFileChangeEventArgs(fileName, directoryPath, changeType));
}
}, CancellationToken.None);
}
void FileService_FileChanged(object sender, FileEventArgs e)
{
foreach (var file in e)
{
if (watchers.TryGetValue(file.FileName, out FileSystemWatcher watcher))
{
ConventionFileChanged?.Invoke(this, new ConventionsFileChangeEventArgs(watcher.Filter, watcher.Path, ChangeType.FileModified));
}
}
}
void FileService_FileChanged(object sender, FileEventArgs e)
{
lock (watchedFiles) {
foreach (var file in e)
{
if (watchedFiles.Contains(file.FileName))
{
ConventionFileChanged?.Invoke(this, new ConventionsFileChangeEventArgs(file.FileName.FileName, file.FileName.ParentDirectory, ChangeType.FileModified));
}
}
}
}
void FileService_FileRemoved(object sender, FileEventArgs e)
{
lock (watchedFiles) {
foreach (var file in e)
{
if (watchedFiles.Remove(file.FileName))
{
ConventionFileChanged?.Invoke(this, new ConventionsFileChangeEventArgs(file.FileName.FileName, file.FileName.ParentDirectory, ChangeType.FileDeleted));
WatchDirectories();
}
}
}
}
void FileService_FileRemoved(object sender, FileEventArgs e)
{
lock (watchers) {
foreach (var file in e)
{
if (watchers.TryGetValue(file.FileName, out FileSystemWatcher watcher))
{
ConventionFileChanged?.Invoke(this, new ConventionsFileChangeEventArgs(watcher.Filter, watcher.Path, ChangeType.FileDeleted));
watcher.Dispose();
watchers.Remove(file.FileName);
}
}
}
}
private Task OnConventionFileChanged(object sender, ConventionsFileChangeEventArgs arg)
{
return(ConventionFileChanged?.Invoke(this, arg) ?? Task.CompletedTask);
}
void OnChanged(object source, FileSystemEventArgs e)
{
var watcher = (FileSystemWatcher)source;
ConventionFileChanged?.Invoke(this, new ConventionsFileChangeEventArgs(watcher.Filter, watcher.Path, GetChangeType(e.ChangeType)));
}
private Task OnConventionFileChangedAsync(object sender, ConventionsFileChangeEventArgs arg) => ConventionFileChanged?.Invoke(this, arg) ?? Task.CompletedTask;
