OpenRA.Map.ComputeUID C# (CSharp) Method

        public static string ComputeUID(IReadOnlyPackage package)
        {
            // UID is calculated by taking an SHA1 of the yaml and binary data
            var requiredFiles = new[] { "map.yaml", "map.bin" };
            var contents = package.Contents.ToList();
            foreach (var required in requiredFiles)
                if (!contents.Contains(required))
                    throw new FileNotFoundException("Required file {0} not present in this map".F(required));

            using (var ms = new MemoryStream())
            {
                foreach (var filename in contents)
                    if (filename.EndsWith(".yaml") || filename.EndsWith(".bin") || filename.EndsWith(".lua"))
                        using (var s = package.GetStream(filename))
                            s.CopyTo(ms);

                // Take the SHA1
                ms.Seek(0, SeekOrigin.Begin);
                using (var csp = SHA1.Create())
                    return new string(csp.ComputeHash(ms).SelectMany(a => a.ToString("x2")).ToArray());
            }
        }

        public void LoadMap(string map, IReadOnlyPackage package, MapClassification classification, MapGrid mapGrid, string oldMap)
        {
            IReadOnlyPackage mapPackage = null;

            try
            {
                using (new Support.PerfTimer(map))
                {
                    mapPackage = package.OpenPackage(map, modData.ModFiles);
                    if (mapPackage != null)
                    {
                        var uid = Map.ComputeUID(mapPackage);
                        previews[uid].UpdateFromMap(mapPackage, package, classification, modData.Manifest.MapCompatibility, mapGrid.Type);

                        if (oldMap != uid)
                        {
                            MapUpdated(oldMap, uid);
                        }
                    }
                }
            }
            catch (Exception e)
            {
                mapPackage?.Dispose();
                Console.WriteLine("Failed to load map: {0}", map);
                Console.WriteLine("Details: {0}", e);
                Log.Write("debug", "Failed to load map: {0}", map);
                Log.Write("debug", "Details: {0}", e);
            }
        }