Convert-it/Areas/AudioTools/Controllers/SpeechToTextController.cs

using Microsoft.AspNetCore.Mvc;
using Convert_It_Online.Services;
using Microsoft.AspNetCore.Localization;
using Microsoft.Extensions.Localization;
using System.IO;

namespace Convert_It_Online.Areas.AudioTools.Controllers
{
    [Area("AudioTools")]
    [Route("{culture}/[area]/[controller]")]
    [Route("[area]/[controller]")] 
    public class SpeechToTextController : Controller
    {
        private readonly IAudioTranscriptionService _transcriptionService;
        private readonly ILogger<SpeechToTextController> _logger;
        private readonly IStringLocalizer<SharedResource> _localizer;

        public SpeechToTextController(IAudioTranscriptionService transcriptionService, 
                                    ILogger<SpeechToTextController> logger,
                                    IStringLocalizer<SharedResource> localizer)
        {
            _transcriptionService = transcriptionService;
            _logger = logger;
            _localizer = localizer;
        }

        private void SetViewBag()
        {
            ViewBag.HomeLink = _localizer["HomeLink"];
            ViewBag.TextMenuTitle = _localizer["TextMenuTitle"];
            ViewBag.DocumentMenuTitle = _localizer["DocumentMenuTitle"];
            ViewBag.ImageMenuTitle = _localizer["ImageMenuTitle"];
            ViewBag.CaseConverterTitle = _localizer["CaseConverterTitle"];
            ViewBag.PdfToTextTitle = _localizer["PdfToTextTitle"];
            ViewBag.PdfBarcodeTitle = _localizer["PdfBarcodeTitle"];
            ViewBag.JpgToWebpTitle = _localizer["JpgToWebpTitle"];
            ViewBag.HeicToJpgTitle = _localizer["HeicToJpgTitle"];
            ViewBag.FooterText = _localizer["FooterText"];
            ViewBag.About = _localizer["About"];
            ViewBag.Contact = _localizer["Contact"];
            ViewBag.Terms = _localizer["Terms"];
        }

        [HttpGet]
        public IActionResult Index()
        {
            SetViewBag();
            return View();
        }

        [HttpPost]
        public async Task<IActionResult> Transcribe(IFormFile audioFile)
        {
            SetViewBag();
            if (audioFile == null || audioFile.Length == 0)
            {
                ViewBag.Error = "Por favor, selecione um arquivo de áudio.";
                return View("Index");
            }

            var culture = HttpContext.Features.Get<IRequestCultureFeature>()?.RequestCulture.UICulture.Name ?? "pt-BR";
            var tempPath = Path.GetTempFileName();

            try
            {
                using (var stream = new FileStream(tempPath, FileMode.Create))
                {
                    await audioFile.CopyToAsync(stream);
                }

                var transcription = await _transcriptionService.TranscribeAsync(tempPath, culture);
                ViewBag.Result = transcription;
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Erro no controller ao transcrever.");
                ViewBag.Error = "Erro ao processar o áudio. Verifique se o formato é suportado.";
            }
            finally
            {
                if (System.IO.File.Exists(tempPath)) System.IO.File.Delete(tempPath);
            }

            return View("Index");
        }

        [HttpPost("HandleShare")]
        public async Task<IActionResult> HandleShare(IFormFile audio)
        {
            // O Android via Share Target costuma enviar como 'audio' ou 'file'
            return await Transcribe(audio);
        }
    }
}