public IActionResult Get(string file, int width, int height, string backgroundColour = null,
string watermark = null, string fileType = "png")
{
try
{
var criteriaBuilder = ImageCriteria.NewBuilder()
.SetSize(width, height)
.SetImageFormat(ParseFormat(fileType));
if (backgroundColour != null)
{
criteriaBuilder.SetBackgroundColour(backgroundColour);
}
if (watermark != null)
{
criteriaBuilder.SetWatermark(watermark);
}
var criteria = criteriaBuilder.Build(file);
var imageBytes = _imageFetcher.Fetch(criteria);
return(File(imageBytes, criteria.Format.MimeType()));
} catch (ArgumentException ex)
{
return(BadRequest(new { errorMessage = ex.Message }));
} catch (Exception ex)
{
_logger.LogError("Failed to fetch image " + ex.Message);
return(StatusCode(500));
}
}
public void TestRGBCriteria()
{
var criteria = ImageCriteria.NewBuilder()
.SetBackgroundColour("255,0,0")
.Build("test.pdf");
Assert.AreEqual(ImageFormat.Png, criteria.Format);
Assert.AreEqual(Tuple.Create(255, 0, 0), criteria.RGBBackgroundColour);
}
public void TestDefaultCriteria()
{
var criteria = ImageCriteria.NewBuilder()
.Build("test.pdf");
Assert.AreEqual("test.pdf", criteria.File);
Assert.AreEqual(ImageFormat.Png, criteria.Format);
Assert.AreEqual(null, criteria.RGBBackgroundColour);
}
public void TestInvalidCriteriaThrowsException()
{
Assert.Throws <ArgumentException>(() => ImageCriteria.NewBuilder()
.SetBackgroundColour(""));
Assert.Throws <ArgumentException>(() => ImageCriteria.NewBuilder()
.SetSize(100000, 1000000));
Assert.Throws <ArgumentException>(() => ImageCriteria.NewBuilder()
.SetSize(-1, -20));
}
public MainViewModel()
{
Criteria = new ImageCriteria();
Images = new ObservableCollection<Image>();
}
