added unzip and showprogress in console in the utils

src/TensorFlowHub/TensorFlowHub.csproj

@@ -9,5 +9,6 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="NumSharp" Version="0.10.4" />
+    <PackageReference Include="sharpcompress" Version="0.23.0" />
   </ItemGroup>
 </Project>

src/TensorFlowHub/Utils.cs

@@ -3,8 +3,12 @@ using System.IO;
 using System.Collections.Generic;
 using System.Net;
 using System.Text;
+using System.Threading;
 using System.Threading.Tasks;
 using NumSharp;
+using SharpCompress;
+using SharpCompress.Common;
+using SharpCompress.Readers;
 
 namespace Tensorflow.Hub
 {
@@ -32,5 +36,72 @@ namespace Tensorflow.Hub
                 await wc.DownloadFileTaskAsync(url, Path.Combine(dirSaveTo, fileName));
             }
         }
+
+        public static void Unzip<TDataSet>(this IModelLoader<TDataSet> modelLoader, string zipFile, string saveTo)
+            where TDataSet : IDataSet
+        {
+            if (!Path.IsPathRooted(saveTo))
+                saveTo = Path.Combine(AppContext.BaseDirectory, saveTo);
+
+            if (!Directory.Exists(saveTo))
+                Directory.CreateDirectory(saveTo);
+
+            using (var stream = File.OpenRead(zipFile))
+            using (var reader = ReaderFactory.Open(stream))
+            {
+                while (reader.MoveToNextEntry())
+                {
+                    if (!reader.Entry.IsDirectory)
+                    {
+                        reader.WriteEntryToDirectory(saveTo, new ExtractionOptions()
+                        {
+                            ExtractFullPath = true,
+                            Overwrite = true
+                        });
+                    }
+                }
+            }
+        }
+
+        public static async Task UnzipAsync<TDataSet>(this IModelLoader<TDataSet> modelLoader, string zipFile, string saveTo)
+            where TDataSet : IDataSet
+        {
+            await Task.Run(() => modelLoader.Unzip(zipFile, saveTo));
+        }
+
+        public static async Task ShowProgressInConsole(this Task task)
+        {
+            var cts = new CancellationTokenSource();
+            var showProgressTask = ShowProgressInConsole(cts);
+            
+            try
+            {
+                await task;
+            }
+            finally
+            {
+                cts.Cancel();
+            }            
+        }
+
+        private static async Task ShowProgressInConsole(CancellationTokenSource cts)
+        {
+            var cols = 0;
+
+            while (!cts.IsCancellationRequested)
+            {
+                await Task.Delay(1000);
+                Console.Write(".");
+                cols++;
+
+                if (cols >= 50)
+                {
+                    cols = 0;
+                    Console.WriteLine();
+                }
+            }
+
+            Console.WriteLine();
+        }
     }
 }