/// <summary>
/// Takes stream containing image and returns <see cref="Attachment" /> object.
/// This method doesn't compress image, it just calculates scaled dimensions
/// And saves the image.
/// </summary>
/// <param name="formFile"></param>
/// <param name="imageName"></param>
/// <param name="chatOrUserId"></param>
/// <param name="sender"></param>
/// <returns></returns>
public async Task <MessageAttachment> SaveMessagePicture(IFormFile formFile,
string imageName, string chatOrUserId, string sender)
{
try
{
using (var image = new MemoryStream())
{
formFile.CopyTo(image);
image.Seek(0, SeekOrigin.Begin);
var resultDimensions =
ImageScaling.GetScaledDimensions(image, MessageImageMaxWidth, MessageImageMaxHeight);
image.Seek(0, SeekOrigin.Begin);
var resized = ImageCompression.Resize(image, resultDimensions.Item1, resultDimensions.Item2);
var imageNameWithoutExt = Path.GetFileNameWithoutExtension(imageName);
var extension = Path.GetExtension(imageName);
imageName = imageName.Length > MaxFileNameLength
? imageNameWithoutExt.Substring(0, MaxFileNameLength - extension.Length) + extension
: imageName;
var resultPath = await SaveFile(formFile, resized, imageName, chatOrUserId, sender);
return(new MessageAttachment
{
AttachmentKind = AttachmentKind.Image,
AttachmentName = imageName,
ContentUrl = config["FileServer:Url"] + resultPath,
ImageHeight = resultDimensions.Item2,
ImageWidth = resultDimensions.Item1
});
}
}
catch (ArgumentException e)
{
logger.LogError(e, "While resizing an image.");
throw new Exception("Failed to upload this image.", e);
}
catch (Exception ex)
{
logger.LogError(ex, "While resizing an image.");
throw new Exception("Failed to upload this image.", ex);
}
}
/// <summary>
/// Returns new thumbnail url and full-sized image url.
/// </summary>
/// <param name="formFile"></param>
/// <param name="imageName"></param>
/// <param name="chatOrUserId"></param>
/// <param name="sender"></param>
/// <returns></returns>
public async Task <ValueTuple <string, string> > SaveProfileOrChatPicture(IFormFile formFile,
string imageName, string chatOrUserId, string sender)
{
try
{
using (var image = new MemoryStream())
{
formFile.CopyTo(image);
image.Seek(0, SeekOrigin.Begin);
var resized = ImageCompression.Resize(image, ThumbnailWidth, ThumbnailHeight);
resized.Seek(0, SeekOrigin.Begin);
image.Seek(0, SeekOrigin.Begin);
imageName = imageName.Length > MaxFileNameLength
? imageName.Substring(0, MaxFileNameLength)
: imageName;
var uncompressedFileName = await SaveFile(formFile, image, imageName, chatOrUserId, sender, FullSized);
var compressedFileName = await SaveFile(formFile, resized, imageName, chatOrUserId, sender, Compressed,
Path.GetDirectoryName(uncompressedFileName) + Path.DirectorySeparatorChar);
resized.Dispose();
return(new ValueTuple <string, string>(
config["FileServer:Url"] + compressedFileName,
config["FileServer:Url"] + uncompressedFileName));
}
}
catch (ArgumentException ex)
{
throw new Exception("Failed to upload this image.", ex);
}
catch (Exception ex)
{
throw new Exception("Failed to upload this image.", ex);
}
}
