printer-api/Controllers/PrinterController.cs

using System.ComponentModel;
using System.Text.Json;
using ESCPOS_NET;
using Microsoft.AspNetCore.Mvc;

[ApiController]
[Route("/api/printer")]
public class PrinterController : Controller
{
	private readonly PrinterService _printer;
	private readonly ILogger _logger;

	public PrinterController(ILogger<PrinterController> logger, PrinterService printer)
	{
		_printer = printer;
		_logger = logger;
	}

	[Route("name")]
	[HttpGet]
	public ActionResult<string> GetName()
	{
		return _printer.GetName();
	}

	[Route("status")]
	[HttpGet]
	public ActionResult<PrinterStatusEventArgs> GetStatus()
	{
		return _printer.GetStatus();
	}

	[Route("print")]
	[HttpPost]
	public ActionResult Print([FromBody] JsonElement[] body)
	{
		var instructions = new List<BaseInstruction>();
		foreach (var instruction in body)
		{
			BaseInstruction? parsedInstruction = null;

			switch (instruction.GetProperty("type").GetString())
			{
				case "text":
					parsedInstruction = instruction.Deserialize<TextInstruction>();
					break;
				case "barcode":
					parsedInstruction = instruction.Deserialize<BarcodeInstruction>();
					break;
				default:
					return BadRequest();
			}

			if (parsedInstruction == null)
			{
				return BadRequest();
			}

			instructions.Add(parsedInstruction);
		}
		_printer.Print(instructions);
		return Ok();
	}
}