public async Task UploadFile()

in src/AIHub/Controllers/DocumentComparisonController.cs [103:145]
37 lines of code
6 McCabe index (conditional complexity)

    public async Task<IActionResult> UploadFile()
    {

        List<IFormFile> documentFiles = Request.Form.Files.ToList();

        // pre-validations
        if (documentFiles == null || !documentFiles.Count.Equals(2))
        {
            ViewBag.Message = "You must upload exactly two documents";
            return View("DocumentComparison", model);
        }

        foreach (var documentFile in documentFiles)
        {
            if (CheckImageExtension(documentFile.FileName.ToString()))
            {
                ViewBag.Message = "You must upload pdf documents only";
                return View("DocumentComparison", model);
            }
        }

        string[] urls = new string[2];
        string[] tabNames = new string[2];
        for (int i = 0; i < documentFiles.Count; i++)
        {
            string url = documentFiles[i].FileName.ToString();
            url = url.Replace(" ", "");
            tabNames[i] = url;
            BlobClient blobClient = containerClient.GetBlobClient(url);
            var httpHeaders = new BlobHttpHeaders
            {
                ContentType = "application/pdf",
            };
            await blobClient.UploadAsync(documentFiles[i].OpenReadStream(), new BlobUploadOptions { HttpHeaders = httpHeaders });
            urls[i] = blobClient.Uri.ToString();
        }

        // Call EvaluateImage with the url
        await DocumentComparison(urls, tabNames, Request.Form["prompt"].ToString());
        ViewBag.Waiting = null;

        return Ok(model);
    }