survey-webapp/SurveyBackend/SurveyBackend.API/Controllers/ExportController.cs

using Microsoft.AspNetCore.Mvc;
using SurveyLib.Tools.Tools;

namespace SurveyBackend.Controllers;

[ApiController]
[Route("api/export")]
public class ExportController
{
    private readonly TableExporter _tableExporter;

    public ExportController(TableExporter tableExporter)
    {
        _tableExporter = tableExporter;
    }

    [HttpGet("excel/{surveyId:int}")]
    public async Task<IActionResult> ExportSurveyById(int surveyId)
    {
        var fileBytes = await _tableExporter.ExportDataBySurveyIdAsync(surveyId);
        return new FileContentResult(fileBytes, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet")
        {
            FileDownloadName = $"survey_{surveyId}_{DateTime.UtcNow:yyyyMMdd_HHmmss}.xlsx"
        };
    }
}