public async Task <TPrimaryKey> CreateAsync(IFormFileCollection attachments, PostDto dto)
{
var isPostingAllowed = await _banService.IsPostingAllowedAsync(dto.ThreadId, dto.UserIpAddress);
if (!isPostingAllowed.Item1)
{
throw new HttpResponseException(HttpStatusCode.Forbidden, isPostingAllowed.Item2);
}
else if (attachments == null)
{
return(await CreateAsync(dto, (post) =>
{
post.Thread = Context.Threads.FirstOrDefault(thread => thread.Id == dto.ThreadId);
}));
}
else
{
var postId = await CreateAsync(dto, (post) =>
{
post.Thread = Context.Threads.FirstOrDefault(thread => thread.Id == dto.ThreadId);
});
try
{
var containerName = dto.ThreadId.ToString();
if (string.IsNullOrWhiteSpace(containerName))
{
throw new Exception($"{nameof(containerName)} is null or whitespace");
}
foreach (var attachment in attachments)
{
string blobName;
var attachmentParentDto = _attachmentCategorizer.CreateAttachmentDto(attachment.FileName);
attachmentParentDto.PostId = postId;
attachmentParentDto.FileExtension = Path.GetExtension(attachment.FileName)?.TrimStart('.');
attachmentParentDto.FileName = Path.GetFileNameWithoutExtension(attachment.FileName);
attachmentParentDto.Size = attachment.Length;
attachmentParentDto.Hash = _cryptoService.HashHex(attachment.OpenReadStream());
if (attachmentParentDto is AudioDto audioDto)
{
blobName = (await _audioService.CreateAsync(audioDto, entity =>
{
entity.Post = Context.Posts.FirstOrDefault(post => post.Id == postId);
})).ToString();
}
else if (attachmentParentDto is PictureDto pictureDto)
{
if (_attachmentCategorizer.IsPictureExtensionSupported(pictureDto.FileExtension))
{
// generate thumbnail if such file extension is supported
var image = Image.Load(attachment.OpenReadStream());
pictureDto.Width = image.Width;
pictureDto.Height = image.Height;
blobName = (await _pictureService.CreateAsync(pictureDto, entity =>
{
entity.Post = Context.Posts.FirstOrDefault(post => post.Id == postId);
})).ToString();
var thumbnail = _thumbnailGenerator.GenerateThumbnail(
image,
_hikkabaConfiguration.ThumbnailsMaxWidth,
_hikkabaConfiguration.ThumbnailsMaxHeight);
await _storageProvider.SaveBlobStreamAsync(
containerName + Defaults.ThumbnailPostfix,
blobName,
thumbnail.Image);
}
else
{
// otherwise save the same image as thumbnail
blobName = (await _pictureService.CreateAsync(pictureDto, entity =>
{
entity.Post = Context.Posts.FirstOrDefault(post => post.Id == postId);
})).ToString();
await _storageProvider.SaveBlobStreamAsync(
containerName + Defaults.ThumbnailPostfix,
blobName,
attachment.OpenReadStream());
}
}
else if (attachmentParentDto is VideoDto videoDto)
{
blobName = (await _videoService.CreateAsync(videoDto, entity =>
{
entity.Post = Context.Posts.FirstOrDefault(post => post.Id == postId);
})).ToString();
}
else if (attachmentParentDto is DocumentDto documentDto)
{
blobName = (await _documentService.CreateAsync(documentDto, entity =>
{
entity.Post = Context.Posts.FirstOrDefault(post => post.Id == postId);
})).ToString();
}
else
{
throw new Exception($"Unknown attachment type: {attachmentParentDto.GetType().Name}");
}
if (string.IsNullOrWhiteSpace(blobName))
{
throw new Exception($"{nameof(blobName)} is null or whitespace");
}
await _storageProvider.SaveBlobStreamAsync(containerName, blobName, attachment.OpenReadStream());
}
}
catch (Exception ex)
{
_logger.LogError(ex + $" Post {postId} will be deleted.");
await DeleteAsync(postId);
throw;
}
return(postId);
}
}
private async Task CreateAttachmentsAsync(string containerName, Post postEntity, IFormFileCollection attachments)
{
foreach (var attachment in attachments)
{
var extension = Path.GetExtension(attachment.FileName)?.ToLowerInvariant()?.TrimStart('.');
var fileName = Path.GetFileNameWithoutExtension(attachment.FileName);
var fileNameWithExtension = fileName + "." + extension;
var attachmentParentDto = _attachmentCategorizer.CreateAttachmentDto(fileNameWithExtension);
attachmentParentDto.PostId = postEntity.Id;
attachmentParentDto.FileExtension = extension;
attachmentParentDto.FileName = fileName;
attachmentParentDto.Size = attachment.Length;
attachmentParentDto.Hash = _cryptoService.HashHex(attachment.OpenReadStream());
string blobName;
switch (attachmentParentDto)
{
case AudioDto audioDto:
{
var audioEntity = MapDtoToNewEntity <AudioDto, Audio>(audioDto);
audioEntity.Post = postEntity;
await _context.Audio.AddAsync(audioEntity);
await _context.SaveChangesAsync();
blobName = audioEntity.Id.ToString();
break;
}
case PictureDto pictureDto:
{
if (_attachmentCategorizer.IsPictureExtensionSupported(pictureDto.FileExtension))
{
using (var image = Image.Load(attachment.OpenReadStream()))
{
pictureDto.Width = image.Width;
pictureDto.Height = image.Height;
var pictureEntity = MapDtoToNewEntity <PictureDto, Picture>(pictureDto);
pictureEntity.Post = postEntity;
await _context.Pictures.AddAsync(pictureEntity);
await _context.SaveChangesAsync();
blobName = pictureEntity.Id.ToString();
// generate thumbnail
var thumbnail = _thumbnailGenerator.GenerateThumbnail(
image,
_hikkabaConfiguration.ThumbnailsMaxWidth,
_hikkabaConfiguration.ThumbnailsMaxHeight);
await _storageProvider.SaveBlobStreamAsync(containerName + Defaults.ThumbnailPostfix,
blobName,
thumbnail.Image);
}
}
else
{
var pictureEntity = MapDtoToNewEntity <PictureDto, Picture>(pictureDto);
pictureEntity.Post = postEntity;
await _context.Pictures.AddAsync(pictureEntity);
await _context.SaveChangesAsync();
blobName = pictureEntity.Id.ToString();
// save original image as thumbnail
await _storageProvider.SaveBlobStreamAsync(containerName + Defaults.ThumbnailPostfix,
blobName,
attachment.OpenReadStream());
}
break;
}
case VideoDto videoDto:
{
var videoEntity = MapDtoToNewEntity <VideoDto, Video>(videoDto);
videoEntity.Post = postEntity;
await _context.Video.AddAsync(videoEntity);
await _context.SaveChangesAsync();
blobName = videoEntity.Id.ToString();
break;
}
case DocumentDto documentDto:
{
var documentEntity = MapDtoToNewEntity <DocumentDto, Document>(documentDto);
documentEntity.Post = postEntity;
await _context.Documents.AddAsync(documentEntity);
await _context.SaveChangesAsync();
blobName = documentEntity.Id.ToString();
break;
}
default:
throw new Exception($"Unknown attachment type: {attachmentParentDto.GetType().Name}");
}
if (string.IsNullOrWhiteSpace(blobName))
{
throw new Exception($"{nameof(blobName)} is null or whitespace");
}
await _storageProvider.SaveBlobStreamAsync(containerName, blobName, attachment.OpenReadStream());
}
}