Refactor exports, remove legacy tests, and update packages

Replaced and optimized export functionality with new zip-based implementation for large files. Removed outdated test methods and improved test structure for better coverage and error handling. Updated dependencies to latest versions, including ClosedXML, Microsoft.AspNetCore.OpenApi.

Author: HaikAsatryan

src/FileExporter/Extensions/EnumerableExtensions.cs

@@ -133,40 +133,29 @@ public static ExportFile ToPdf<T>(this IEnumerable<T> data,
       return ReturnFileOrZippedVersion(datatable, files, MimeTypes.Pdf);
    }
 
-   public static ExportFile ToFileFormat<T>(this IEnumerable<T> data, ExportType type)
+   private static ExportFile CreateZip(string baseName, MimeTypes innerType, IReadOnlyList<byte[]> parts)
    {
-      return type switch
+      using var ms  = new MemoryStream();                      
+      using (var zip = new ZipArchive(ms, ZipArchiveMode.Create, leaveOpen: true))
       {
-         ExportType.Xlsx => data.ToXlsx(),
-         ExportType.Csv => data.ToCsv(),
-         ExportType.Pdf => data.ToPdf(),
-         _ => throw new ArgumentOutOfRangeException(nameof(type), type, null)
-      };
-   }
+         for (var i = 0; i < parts.Count; i++)
+         {
+            var entryName = parts.Count == 1
+               ? $"{baseName}{innerType.Extension}"          
+               : $"{baseName}_{i + 1}{innerType.Extension}"; 
 
-   private static ExportFile Zip(string fileName, MimeTypes mimeType, List<byte[]> files)
-   {
-      using var memoryStream = new MemoryStream();
-      using var archive = new ZipArchive(memoryStream, ZipArchiveMode.Create, true);
-      {
-      }
-      for (var i = 0; i < files.Count; i++)
-      {
-         var entry = archive.CreateEntry(fileName + Suffix(i), CompressionLevel.Optimal);
-         using var entryStream = entry.Open();
-         entryStream.Write(files[i], 0, files[i].Length);
-      }
+            var entry = zip.CreateEntry(entryName, CompressionLevel.Optimal);
 
-      archive.Dispose(); //don't delete this line otherwize file will be corrupted
-
-      return new ExportFile(fileName, MimeTypes.Zip, memoryStream.ToArray());
-
-      string Suffix(int index)
-      {
-         return files.Count == 1 ? $"{mimeType.Extension}" : $"_{index + 1}{mimeType.Extension}";
+            using var es = entry.Open();
+            es.Write(parts[i]);                               
+         }
       }
+
+      // no extra ToArray();  MemoryStream already owns the buffer we need
+      return new ExportFile($"{baseName}.zip", MimeTypes.Zip, ms.GetBuffer()[..(int)ms.Length]);
    }
 
+
    private static ExportFile ReturnFileOrZippedVersion<T>(DataTable<T> dataTable, List<byte[]> files, MimeTypes type)
    {
       if (files.Count == 1 && files.First()
@@ -175,6 +164,6 @@ private static ExportFile ReturnFileOrZippedVersion<T>(DataTable<T> dataTable, L
          return new ExportFile(dataTable.Name, type, files.First());
       }
 
-      return Zip(dataTable.Name, type, files);
+      return CreateZip(dataTable.Name, type, files);
    }
 }

src/FileExporter/FileExporter.csproj

@@ -8,13 +8,13 @@
         <Copyright>MIT</Copyright>
         <PackageIcon>Logo.jpg</PackageIcon>
         <PackageReadmeFile>Readme.md</PackageReadmeFile>
-        <Version>4.0.3</Version>
+        <Version>4.0.4</Version>
         <Company>PandaTech</Company>
         <Title>Model to File</Title>
         <PackageTags>Pandatech, lib, export, xlsx, csv, pdf</PackageTags>
         <Description>Export table data into xls, xlsx, csv, pdf formats</Description>
         <RepositoryUrl>https://github.com/PandaTechAM/be-lib-file-exporter</RepositoryUrl>
-        <PackageReleaseNotes>Cleanup</PackageReleaseNotes>
+        <PackageReleaseNotes>Refactor exports, remove legacy tests, and update packages</PackageReleaseNotes>
     </PropertyGroup>
 
     <ItemGroup>
@@ -38,8 +38,8 @@
     </ItemGroup>
 
     <ItemGroup>
-        <PackageReference Include="ClosedXML" Version="0.104.2" />
-        <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.4" />
+        <PackageReference Include="ClosedXML" Version="0.105.0" />
+        <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.5" />
         <PackageReference Include="PdfSharpCore" Version="1.3.67" />
     </ItemGroup>
 </Project>

test/FileExporter.Demo/FileExporter.Demo.csproj

@@ -7,7 +7,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.4"/>
+        <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.5" />
         <PackageReference Include="Swashbuckle.AspNetCore" Version="8.1.1"/>
     </ItemGroup>
 

test/FileExporter.Tests/AppDbContext.cs

@@ -22,7 +22,6 @@
     </ItemGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="9.0.4"/>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.13.0"/>
         <PackageReference Include="xunit" Version="2.9.3"/>
         <PackageReference Include="coverlet.collector" Version="6.0.4">