first commit

Classes/FileUtil.cs

@@ -0,0 +1,62 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Security.Cryptography;
+
+namespace EFCDesk.Classes
+{
+    public static class FileUtil
+    {
+        public static bool IsFileReady(string path)
+        {
+            try
+            {
+                using var stream = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.None);
+                return stream.Length >= 0; // si abre sin excepción, está listo
+            }
+            catch
+            {
+                return false;
+            }
+        }
+
+        public static bool WaitAllFilesReady(IEnumerable<string> files, int perFileTimeoutSeconds)
+        {
+            var deadline = DateTime.UtcNow.AddSeconds(perFileTimeoutSeconds);
+            var pendientes = new HashSet<string>(files);
+
+            while (pendientes.Count > 0 && DateTime.UtcNow < deadline)
+            {
+                var listos = new List<string>();
+                foreach (var f in pendientes)
+                {
+                    if (File.Exists(f) && IsFileReady(f))
+                        listos.Add(f);
+                }
+                foreach (var ok in listos)
+                    pendientes.Remove(ok);
+
+                if (pendientes.Count == 0) return true;
+                Thread.Sleep(500);
+            }
+            return pendientes.Count == 0;
+        }
+
+        public static string? TryGetSHA1(string path)
+        {
+            try
+            {
+                using var fs = File.OpenRead(path);
+                using var sha1 = SHA1.Create();
+                var hash = sha1.ComputeHash(fs);
+                return BitConverter.ToString(hash).Replace("-", "");
+            }
+            catch
+            {
+                return null;
+            }
+        }
+    }
+}