add not tested table creation

SurveyLib.Tools/SurveyLib.Tools.csproj

@@ -0,0 +1,17 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net8.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\SurveyLib.Core\SurveyLib.Core.csproj" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <PackageReference Include="ClosedXML" Version="0.105.0" />
+    </ItemGroup>
+
+</Project>

SurveyLib.Tools/Tools/TableExporter.cs

@@ -0,0 +1,48 @@
+using ClosedXML.Excel;
+using SurveyLib.Core.Services;
+using SurveyLib.Core.Tools;
+
+namespace SurveyLib.Tools.Tools;
+
+public class TableExporter : IDataExporter
+{
+    private readonly ISurveyService _surveyService;
+    private readonly IQuestionService _questionService;
+
+    public TableExporter(ISurveyService surveyService, IQuestionService questionService)
+    {
+        _surveyService = surveyService;
+        _questionService = questionService;
+    }
+
+    public async Task<byte[]> ExportDataBySurveyIdAsync(int surveyId)
+    {
+        var survey = await _surveyService.GetSurveyAsync(surveyId);
+        var questions = await _questionService.GetQuestionsBySurveyIdAsync(surveyId);
+
+        using var workbook = new XLWorkbook();
+        var ws = workbook.Worksheets.Add("Sheet1");
+        ws.Cell(1, 1).Value = "Title";
+        ws.Cell(1, 2).Value = survey.Title;
+
+        ws.Cell(2, 1).Value = "Description";
+        ws.Cell(2, 2).Value = survey.Description;
+
+        ws.Cell(3, 1).Value = "Created At";
+        ws.Cell(3, 2).Value = DateTime.UtcNow;
+
+        ws.Cell(4, 1).Value = "Completed By";
+        ws.Cell(4, 2).Value = "Finished At";
+
+        var column = 3;
+        foreach (var question in questions)
+        {
+            ws.Cell(4, column).Value = question.Title;
+            column++;
+        }
+
+        using var stream = new MemoryStream();
+        workbook.SaveAs(stream);
+        return stream.ToArray();
+    }
+}