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 +1,72 @@
+using System;
+using FileCompression.Interfaces;
+using System.IO;
+using System.IO.Compression;
+using System.Collections.Generic;
+using FileCompression.Utils;
+
+namespace FileCompression.Services.Strategies;
+
+public class ZipStrategy : ICompressionStrategy
+{
+
+
+    public void CompressFile(string sourcePath, string destinationPath, string basePath)
+    {
+        Console.WriteLine($"Compressing file {sourcePath} to {destinationPath}");
+
+        using (Stream destination = new FileStream(destinationPath, FileMode.OpenOrCreate, FileAccess.ReadWrite))
+        {
+            using ZipArchive archive = new ZipArchive(destination, ZipArchiveMode.Update);
+            string entryName = ArchiveUtils.EntryFromPath(sourcePath.AsSpan(basePath.Length));
+            DoCreateEntryFromFile(archive, sourcePath, entryName, CompressionLevel.Optimal);
+        }
+    }
+
+    public void CompressDirectory(string sourcePath, string destinationPath, string basePath)
+    {
+        Console.WriteLine($"Compressing directory {sourcePath} to {destinationPath}");
+
+        using (Stream destination = new FileStream(destinationPath, FileMode.OpenOrCreate, FileAccess.ReadWrite))
+        {
+            using ZipArchive archive = new ZipArchive(destination, ZipArchiveMode.Update);
+            string entryName = ArchiveUtils.EntryFromPath(sourcePath.AsSpan(basePath.Length), appendPathSeparator: true);
+            archive.CreateEntry(entryName);
+        }
+    }
+
+    private ZipArchiveEntry DoCreateEntryFromFile(ZipArchive destination,
+                                                              string sourceFileName, string entryName, CompressionLevel? compressionLevel)
+    {
+        ArgumentNullException.ThrowIfNull(destination);
+        ArgumentNullException.ThrowIfNull(sourceFileName);
+        ArgumentNullException.ThrowIfNull(entryName);
+
+        // Checking of compressionLevel is passed down to DeflateStream and the IDeflater implementation
+        // as it is a pluggable component that completely encapsulates the meaning of compressionLevel.
+
+        // Argument checking gets passed down to FileStream's ctor and CreateEntry
+
+        using (FileStream fs = new FileStream(sourceFileName, FileMode.Open, FileAccess.Read, FileShare.Read, bufferSize: 0x1000, useAsync: false))
+        {
+            ZipArchiveEntry entry = compressionLevel.HasValue
+                                ? destination.CreateEntry(entryName, compressionLevel.Value)
+                                : destination.CreateEntry(entryName);
+
+            DateTime lastWrite = File.GetLastWriteTime(sourceFileName);
+
+            // If file to be archived has an invalid last modified time, use the first datetime representable in the Zip timestamp format
+            // (midnight on January 1, 1980):
+            if (lastWrite.Year < 1980 || lastWrite.Year > 2107)
+                lastWrite = new DateTime(1980, 1, 1, 0, 0, 0);
+
+            entry.LastWriteTime = lastWrite;
+
+            using (Stream es = entry.Open())
+                fs.CopyTo(es);
+
+            return entry;
+        }
+    }
+
+}