lux/Lux.API/Controllers/FileController.cs

using EgwCoreLib.Lux.Data.Services;
using EgwMultiEngineManager.Data;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using NLog;
using System;
using System.Data;
using System.Diagnostics;
using System.Text;

namespace Lux.API.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class FileController : ControllerBase
    {
        #region Public Constructors

        /// <summary>
        /// Controller per gestione file (es download JWD)
        /// </summary>
        /// <param name="imgServ"></param>
        /// <param name="logger"></param>
        public FileController(DataLayerServices DLService, ImageCacheService imgServ, ILogger<ImageController> logger)
        {
            _imgService = imgServ;
            _DSService = DLService;
            _logger = logger;
        }

        #endregion Public Constructors

        #region Public Methods

#if false
        /// <summary>
        /// Chiamata GET: restituisce file PNG (da file o da cache)
        /// PUT: api/image/png/00000000-0000-0000-0000-000000000000
        /// </summary>
        /// <param name="id">id oggetto</param>
        /// <returns></returns>
        [HttpGet("png/{id}")]
        public async Task<IActionResult> png(string id)
        {
            Stopwatch sw = new Stopwatch();
            sw.Start();
            string base64Encoded = "";
            byte[] decodedBytes = new byte[0];
            // ...se ricevo percorso --> leggo jwd/svg cablato
            if (!string.IsNullOrEmpty(id))
            {
                // bonifica nome svg da
                base64Encoded = _imgService.LoadPng(id, EgwMultiEngineManager.Data.Constants.EXECENVIRONMENTS.BEAM);
                // converto base64
                decodedBytes = Convert.FromBase64String(base64Encoded);
            }
            sw.Stop();
            Log.Info($"pngString | {sw.Elapsed.TotalMilliseconds:N3} ms");
            //return Ok(decodedString);
            return File(decodedBytes, "image/png");
        }

        /// <summary>
        /// Chiamata GET: riceve Json in formato JwdDto, restituisce svg file
        /// GET: api/Jwd/svg/00000000-0000-0000-0000-000000000000
        /// </summary>
        /// <param name="id">id univoco img</param>
        /// <returns></returns>
        [HttpGet("svg/{id}")]
        public async Task<IActionResult> svgFileGet(string id)
        {
            Stopwatch sw = new Stopwatch();
            sw.Start();
            string filePath = Path.Combine("DemoImg", "AntaDoppia.svg");
            var svgContent = await System.IO.File.ReadAllTextAsync(filePath);
            var bytes = System.Text.Encoding.UTF8.GetBytes(svgContent);
            sw.Stop();
            _logger.LogInformation($"svgString | {sw.Elapsed.TotalMilliseconds:N3} ms");
            return File(bytes, "image/svg+xml");
        } 
#endif

        /// <summary>
        /// Chiamata GET: restituisce file di un determinato objType
        /// GET: api/file/POR.25.0000000E?env=WINDOW&type=POR
        /// GET: api/file/SOR.25.0000000E?env=WINDOW&type=SOR
        /// 
        /// nb: al momento solo window e file jwd
        /// </summary>
        /// <param name="id">uid oggetto</param>
        /// <param name="objType">tipologia oggetto (SOR/POR)</param>
        /// <param name="env">environment oggetto</param>
        /// <returns></returns>
        [HttpGet("{id}")]
        public async Task<IActionResult> porFile(string id, string objType = "SOR", Constants.EXECENVIRONMENTS env = Constants.EXECENVIRONMENTS.WINDOW)
        {
            Stopwatch sw = new Stopwatch();
            sw.Start();

            if (string.IsNullOrEmpty(id))
                return NotFound();

            // accetta SOLO env window...
            if (env != Constants.EXECENVIRONMENTS.WINDOW)
            {
                return BadRequest("Only Window env");
            }
            else
            {
                string mimeType = "txt";
                string fileName = id.Replace(".", "_").Replace(" ", "_").Replace(":", "_");
                byte[] bytes = new byte[0];
                // ...se ricevo percorso --> leggo jwd/svg cablato
                if (!string.IsNullOrEmpty(id))
                {
                    // se contiene i caratteri casuali x forzare reload --> li levo
                    if (id.Contains("-"))
                    {
                        id = id.Substring(0, id.IndexOf("-"));
                    }

                    // secondo del tipo + enivr decodifico valore corretto
                    switch (env)
                    {
                        case Constants.EXECENVIRONMENTS.NULL:
                            break;
                        case Constants.EXECENVIRONMENTS.WINDOW:
                            mimeType = "application/octet-stream";
                            fileName = $"{fileName}.jwd";
                            // recupero riga..
                            string jsonContent = "";// await _imgService.LoadSvgAsync(id, env);
                            // a seconda del tipo leggo da 2 aree db diverse...
                            if (objType == "POR")
                            {
                                var currPOR = await _DSService.OrderRowGetByUID(id);
                                jsonContent = currPOR?.SerStruct ?? "";
                            }
                            else if (objType == "SOR")
                            {
                                var currSOR = await _DSService.OfferRowGetByUID(id);
                                jsonContent = currSOR?.SerStruct ?? "";
                            }
                            // se NON vuoto --> converto byte stream...
                            if (!string.IsNullOrEmpty(jsonContent))
                            {
                                bytes = Encoding.UTF8.GetBytes(jsonContent);
                            }
                            break;
                        case Constants.EXECENVIRONMENTS.BEAM:
                        case Constants.EXECENVIRONMENTS.WALL:
                        case Constants.EXECENVIRONMENTS.CABINET:
                        default:
                            mimeType = "image/png";
                            string base64Encoded = _imgService.LoadPng(id, EgwMultiEngineManager.Data.Constants.EXECENVIRONMENTS.BEAM);
                            // converto base64
                            bytes = Convert.FromBase64String(base64Encoded);
                            break;
                    }
                }
                sw.Stop();
                Log.Info($"{mimeType} | {sw.Elapsed.TotalMilliseconds:N3} ms");
                return File(bytes, mimeType, fileName);
            }
        }



        #endregion Public Methods

        #region Private Fields

        private static Logger Log = LogManager.GetCurrentClassLogger();
        private readonly ILogger<ImageController> _logger;

        #endregion Private Fields

        #region Private Properties

        private ImageCacheService _imgService { get; set; }
        private DataLayerServices _DSService { get; set; }

        #endregion Private Properties
    }
}