Anul 3 Semestrul 2

2025-07-03 20:56:38 +03:00
parent 184f3bd92e
commit 3b7fb85767
269 changed files with 20955 additions and 0 deletions
@@ -0,0 +1,68 @@
+using System;
+using System.Formats.Tar;
+using FileCompression.Interfaces;
+using FileCompression.Utils;
+
+namespace FileCompression.Services.Strategies;
+
+public class TarGzStrategy : ICompressionStrategy
+{
+    public void CompressFile(string sourcePath, string destinationPath, string basePath)
+    {
+        Console.WriteLine($"Compressing {sourcePath} to {destinationPath} using tar and gzip.");
+        string tempPath = Path.GetTempFileName();
+        using (var tempStream = new FileStream(tempPath, FileMode.Create, FileAccess.Write))
+        using (var tempWriter = new TarWriter(tempStream, TarEntryFormat.Pax))
+        {
+            // Copy existing entries to temp file
+            if (File.Exists(destinationPath))
+            {
+                using (var originalStream = new FileStream(destinationPath, FileMode.Open, FileAccess.Read))
+                using (var tarReader = new TarReader(originalStream, leaveOpen: false))
+                {
+                    TarEntry? entry;
+                    while ((entry = tarReader.GetNextEntry()) is not null)
+                    {
+                        tempWriter.WriteEntry(entry);
+                    }
+                }
+            }
+
+            // Add new entry
+            string entryName = ArchiveUtils.EntryFromPath(sourcePath.AsSpan(basePath.Length));
+            tempWriter.WriteEntry(sourcePath, entryName);
+        }
+
+        File.Copy(tempPath, destinationPath, overwrite: true);
+        File.Delete(tempPath);
+
+    }
+
+    public void CompressDirectory(string sourcePath, string destinationPath, string basePath)
+    {
+        Console.WriteLine($"Compressing {sourcePath} to {destinationPath} using tar and gzip.");
+        string tempPath = Path.GetTempFileName();
+        using (var tempStream = new FileStream(tempPath, FileMode.Create, FileAccess.Write))
+        using (var tempWriter = new TarWriter(tempStream, TarEntryFormat.Pax))
+        {
+            // Copy existing entries to temp file
+            if (File.Exists(destinationPath))
+            {
+                using (var originalStream = new FileStream(destinationPath, FileMode.Open, FileAccess.Read))
+                using (var tarReader = new TarReader(originalStream, leaveOpen: false))
+                {
+                    TarEntry? entry;
+                    while ((entry = tarReader.GetNextEntry()) is not null)
+                    {
+                        tempWriter.WriteEntry(entry);
+                    }
+                }
+            }
+
+            // Add new entry
+            string entryName = ArchiveUtils.EntryFromPath(sourcePath.AsSpan(basePath.Length), appendPathSeparator: true);
+            tempWriter.WriteEntry(sourcePath, entryName);
+        }
+
+    }
+}