public FileSubstitutionsProvider(string file, IFileLoader fileLoader)
{
Console.WriteLine($"New file substitution provider in {file} using {fileLoader} loader");
if (!File.Exists(file))
{
throw new FileNotFoundException($"File does not exist: {file}");
}
this.fileLoader = fileLoader;
this.file = file;
var fileName = Path.GetFileName(file);
var filePath = Path.GetDirectoryName(file);
watcher = new FileSystemWatcher(filePath, fileName);
var changeLock = new Object();
var lastChange = DateTime.Now;
watcher.Changed += async(object source, FileSystemEventArgs e) =>
{
if (this.OnSubstitutionsUpdated != null &&
DateTime.Now.Subtract(lastChange).TotalMilliseconds > 1100) // Sometimes 2 events get triggered for same change
{
lastChange = DateTime.Now;
Thread.Sleep(1000);
var substitutions = await fileLoader.loadFileAsync(file);
await OnSubstitutionsUpdated(substitutions);
}
};
watcher.EnableRaisingEvents = true;
}