private static void WatchFaces(string directory, bool debug, Machine machine)
{
var lastSeen = new Dictionary <string, DateTime>();
var repeatTime = double.Parse(config["faceRepeatSeconds"]);
var watcher = new FileSystemWatcher(directory)
{
IncludeSubdirectories = true, EnableRaisingEvents = true
};
var wait = new EventWaitHandle(false, EventResetMode.AutoReset);
string imagePath = null;
watcher.Created += (_, e) =>
{
imagePath = e.FullPath;
wait.Set();
if (debug)
{
Console.WriteLine($"Image: {imagePath}");
}
};
(new Thread(new ThreadStart(() =>
{
while (true)
{
wait.WaitOne();
if (debug)
{
Console.WriteLine($"Face reco {imagePath}");
}
byte[] image = null;
var attempt = 3;
do
{
try
{
image = File.ReadAllBytes(imagePath);
break;
}
catch (Exception)
{
Thread.Sleep(100); // file lock
}
} while (attempt-- > 0);
if (image != null)
{
foreach (var f in faces.RecoFaces(image, debug))
{
if (debug)
{
Console.WriteLine($"Recognized {f}");
}
var last = lastSeen.ContainsKey(f) ? lastSeen[f] : DateTime.MinValue;
if ((DateTime.Now - last).TotalSeconds > repeatTime)
{
var key = $"faceGreeting.{f}";
var cmd = config.ContainsKey(key) ? config[key] : config["faceGreeting.default"];
machine.Execute(String.Format(cmd, f));
}
else
{
if (debug)
{
Console.WriteLine(" Already seen recently...");
}
}
lastSeen[f] = DateTime.Now;
}
}
}
}))
{
IsBackground = true
}).Start();
}