Servicio-Impresion-Web-Local/Controllers/PrinterController.cs

using Microsoft.AspNetCore.Mvc;
using Spire.Pdf;
using System.Drawing.Printing;
using System.Net;
using System.Net.Sockets;
using System.Text;
namespace printservice.Controllers
{

    public class PrintTextRequest
    {
        public required string PrinterIp { get; set; }
        public required string Text { get; set; }
    }


    [ApiController]
    [Route("api/printer")]
    public class PrinterController : ControllerBase
    {
        private readonly ILogger<PrinterController> _logger;
        public PrinterController(ILogger<PrinterController> logger)

        {
            _logger = logger;
        }

        [HttpGet("list")]
        public IActionResult GetPrinters()
        {
            try
            {
                // Obtener la lista de impresoras instaladas
                var printers = PrinterSettings.InstalledPrinters.Cast<string>().ToList();
                if (printers.Count == 0)
                {
                    return NotFound("No se encontraron impresoras instaladas.");
                }
                return Ok(printers);
            }
            catch (Exception ex)
            {

                _logger.LogError(ex, "Error al obtener la lista de impresoras.");
                return StatusCode(500, "Error interno del servidor al listar impresoras.");
            }
        }

        [HttpGet("get-local-ip")]
        public IActionResult GetLocalIP()
        {
            var hostName = Dns.GetHostName();// Nombre de la PC
            var localIP = Dns.GetHostAddresses(hostName)
                .Where(ip => ip.AddressFamily == AddressFamily.InterNetwork)//Obtener solo IPv4
                .Select(ip => ip.ToString());
            return Ok(new
            {
                machineName = hostName,
                localIPs = localIP
            });
        }

        [HttpPost("open-drawer")]
        public IActionResult OpenDrawer([FromBody] string printerIp)
        {
            try
            {
                using (var client = new TcpClient(printerIp, 9100)) // Puerto común para impresoras ESC/POS
                using (var stream = client.GetStream())
                {
                    // Comando para abrir la gaveta
                    byte[] command = new byte[] { 0x1B, 0x70, 0x00, 0x19, 0xFA };
                    stream.Write(command, 0, command.Length);
                }
                return Ok("Gaveta abierta correctamente.");
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error al abrir la gaveta: {Message}", ex.Message);
                return StatusCode(500, "Error interno del servidor al abrir la gaveta.");
            }
        }

        [HttpPost("print-text")]
        public IActionResult PrintText([FromBody] PrintTextRequest request)
        {
            try
            {
                using (var client = new TcpClient(request.PrinterIp, 9100)) // Puerto común para impresoras ESC/POS
                using (var stream = client.GetStream())
                {
                    byte[] textBytes = Encoding.ASCII.GetBytes(request.Text + "\n");
                    stream.Write(textBytes, 0, textBytes.Length);
                }
                return Ok("Texto enviado a imprimir correctamente.");
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error al imprimir texto.");
                return StatusCode(500, "Error interno del servidor al imprimir texto.");
            }
        }

        [HttpPost("print-ticket")]
        public IActionResult PrintTicket(IFormFile file, [FromForm] string printerName)
        {
            try
            {
                if (file == null || file.Length == 0)
                {
                    return BadRequest("No se envió ningún archivo.");
                }
                if (string.IsNullOrEmpty(printerName))
                {
                    return BadRequest("No se ingreso nombre de impresora");
                }
                // Guardar temporalmente el archivo
                var tempFilePath = Path.Combine(Path.GetTempPath(), $"{Guid.NewGuid()}.pdf ");
                using (var stream = new FileStream(tempFilePath, FileMode.Create))
                {
                    file.CopyTo(stream);
                }
                // Cargar el PDF
                var pdfDocument = new PdfDocument();
                pdfDocument.LoadFromFile(tempFilePath);
                // Configurar la impresora
                pdfDocument.PrintSettings.PrinterName = printerName;
                pdfDocument.PrintSettings.SelectPageRange(1, pdfDocument.Pages.Count);
                pdfDocument.PrintSettings.SelectSinglePageLayout(Spire.Pdf.Print.PdfSinglePageScalingMode.FitSize);
                // Enviar a imprimir
                pdfDocument.Print();
                // Liberar recursos
                pdfDocument.Close();
                // Eliminar el archivo temporal
                System.IO.File.Delete(tempFilePath);
                return Ok("PDF enviado a imprimir correctamente.");

            }
            catch (Exception ex)
            {

                return StatusCode(500, $"Error al imprimir el PDF: {ex.Message}");
            }
        }

        [HttpPost("cut-paper")]
        public IActionResult CutPaper([FromBody] string printerIp)
        {
            try
            {
                using (var client = new TcpClient(printerIp, 9100)) // Puerto común para impresoras ESC/POS
                using (var stream = client.GetStream())
                {
                    // Comando para cortar papel
                    byte[] cutCommand = new byte[] { 0x1D, 0x69 }; // Comando ESC/POS para cortar papel
                    stream.Write(cutCommand, 0, cutCommand.Length);
                }
                return Ok("Papel cortado correctamente.");
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error al cortar papel.");
                return StatusCode(500, "Error interno del servidor al cortar papel.");
            }
        }


    }
}