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using System.Diagnostics;
using Microsoft.AspNetCore.Mvc;
using PhotoEditor.Models;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.Processing;
using SixLabors.ImageSharp.Formats;
using SixLabors.ImageSharp.PixelFormats;
using SixLabors.ImageSharp.Advanced;
using Newtonsoft.Json;
namespace PhotoEditor.Controllers;
[ApiController]
[Route("api/[controller]")]
public class DynamicPhotoEditorController : BaseAPIController
{
private readonly ILogger<DynamicPhotoEditorController> _logger;
private Image _cachedImage = null;
public DynamicPhotoEditorController(ILogger<DynamicPhotoEditorController> logger)
{
_logger = logger;
}
[HttpPost]
[Route("EditImage")]
public IActionResult EditImage([FromBody]PhotoTransferRequestModel photoTransferRequestModel)
{
try {
this._cachedImage = Image.Load(Convert.FromBase64String(photoTransferRequestModel.Base64Blob));
_logger.LogTrace(0, "Loaded Image: {0}", this._cachedImage);
var actionMethod = this.GetType().GetMethod(photoTransferRequestModel.DynamicAction);
if (actionMethod == null) {
throw new Exception("Unable to find dynamic action: " + photoTransferRequestModel.DynamicAction);
}
var editParams = (object[])JsonConvert.DeserializeObject<object[]>(photoTransferRequestModel.Parameters);
if (photoTransferRequestModel.Types != null) {
for (int i = 0; i < photoTransferRequestModel.Types.Length; i++) {
editParams[i] = JsonConvert.DeserializeObject(JsonConvert.SerializeObject(editParams[i]),GetTypeByName(photoTransferRequestModel.Types[i]));
}
}
_logger.LogWarning(0, "Params: {0} Raw: {1}", editParams, photoTransferRequestModel.Parameters);
var transformedImage = (Image)actionMethod.Invoke(this, editParams);
var imageAsBase64 = ImageToBase64(transformedImage);
var retValue = new PhotoTransferResponseModel();
retValue.Base64Blob = imageAsBase64;
return Ok(retValue);
}
catch (Exception e) {
Console.WriteLine(e.ToString());
var retValue = new PhotoTransferResponseModel();
retValue.Error = e.Message;
return StatusCode(StatusCodes.Status500InternalServerError, retValue);
}
}
private Type GetTypeByName(String name) {
return AppDomain.CurrentDomain.GetAssemblies()
.Reverse()
.Select(assembly => assembly.GetType(name))
.FirstOrDefault(t => t != null);
}
public String ImageToBase64(Image image) {
using (var memoryStream = new MemoryStream())
{
var imageEncoder = image.Metadata.DecodedImageFormat;
image.SaveAsPng(memoryStream);
return Convert.ToBase64String(memoryStream.ToArray());
}
}
public Image GrayscaleImage(double amount) {
this._cachedImage.Mutate(m => m.Grayscale((float)amount));
return this._cachedImage;
}
public Image BlackWhiteImage() {
this._cachedImage.Mutate(m => m.BlackWhite());
return this._cachedImage;
}
public Image RotateImage(double degrees) {
this._cachedImage.Mutate(m => m.Rotate((float)degrees));
return this._cachedImage;
}
public Image InvertImage() {
this._cachedImage.Mutate(m => m.Invert());
return this._cachedImage;
}
public Image CropImage(RectangleStruct rect) {
this._cachedImage.Mutate(m => m.Crop(new Rectangle(rect.X, rect.Y, rect.W, rect.H)));
return this._cachedImage;
}
}
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