private static void Quality(MagickImage image, ImageParameters parameters)
{
if (!(parameters.Quality is null))
{
image.Quality = parameters.Quality.Value;
}
}
private ActionResult IllegalCrop(ImageParameters parameters)
{
var caption = $"Acceptable crops:\n{string.Join("\n", Configuration.Crops.Select(m => $"{m.Name}"))}";
var image = ImageController.GetCaption(caption);
this.Response.RegisterForDispose(image);
ImageController.Resize(image, parameters);
return(this.BadRequest(image));
}
private ActionResult NotFound(ImageParameters parameters)
{
var image = ImageController.GetCaption("Not found");
this.Response.RegisterForDispose(image);
ImageController.Crop(image, parameters, new ImageDetails(3797 / 2, 5315 / 2));
ImageController.Resize(image, parameters);
ImageController.Quality(image, parameters);
return(this.NotFound(image));
}
private static void Download(ImageParameters parameters, HttpContext context)
{
if (parameters.Download)
{
var mapping = Configuration.PhotoMappings.Single(row => row.MediaType == parameters.MediaType);
var extension = mapping.Extension;
var fileName = string.Format("{0}.{1}", parameters.Id, extension);
var disposition = new ContentDispositionHeaderValue("attachment")
{
FileName = fileName
};
context.Response.Headers[HeaderNames.ContentDisposition] = disposition.ToString();
}
}
private async Task <ActionResult> Process(ImageParameters parameters)
{
var details = await ImageDetails.GetById(parameters.Id);
var image = await ImageController.GetImage(parameters.Id);
this.Response.RegisterForDispose(image);
ImageController.Crop(image, parameters, details);
ImageController.Resize(image, parameters);
ImageController.Quality(image, parameters);
ImageController.Metadata(image, details);
return(this.Ok(image));
}
public async Task <ActionResult> Get(ImageParameters parameters)
{
try
{
return(await this.Process(parameters));
}
catch (ImageNotFoundException)
{
return(this.NotFound(parameters));
}
catch (UnkownCropException)
{
return(this.IllegalCrop(parameters));
}
}
private static void Resize(MagickImage image, ImageParameters parameters)
{
if (parameters.Width is null && parameters.Height is null)
{
return;
}
var size = new MagickGeometry(
parameters.Width.GetValueOrDefault(image.Width),
parameters.Height.GetValueOrDefault(image.Height));
image.ColorSpace = ColorSpace.RGB;
image.Scale(size);
image.RePage();
image.ColorSpace = ColorSpace.sRGB;
}
private static void Crop(MagickImage image, ImageParameters parameters, ImageDetails details)
{
if (parameters.Crop is null)
{
return;
}
var crop = Configuration.Crops.SingleOrDefault(c => c.Name == parameters.Crop);
if (crop.Name is null)
{
throw new UnkownCropException();
}
var x = 1;
if (!(crop.OffsetX is null))
{
x = details.CenterX - crop.OffsetX.Value;
}
image.Crop(x, details.CenterY - crop.OffsetY, crop.Width, crop.Height);
}
