public async Task <OperationStatus> UploadPresentationForUser(string userId, UploadPresentationModel model)
{
var upList = await _context.UserPresentations.Where(userPresentation => userPresentation.UserId == userId)
.Include(userp => userp.Presentation).Where(userp => userp.Presentation.Name == model.Name).ToListAsync();
if (upList.Count > 0)
{
return(new OperationStatus {
ErrorMessageIfAny = OperationStatus.kPresentationWithSameNameExists
});
}
if (!_context.Categories.Any(c => c.Id == model.CategoryId))
{
return(new OperationStatus {
ErrorMessageIfAny = OperationStatus.kNoSuchCategoryWithId
});
}
var tagsForPresentationResult = await _tagsRepository.CreateOrGetTags(model.Tags);
if (tagsForPresentationResult.ErrorMessageIfAny != null)
{
return(tagsForPresentationResult);
}
var tagsForPresentation = tagsForPresentationResult.Value;
var currentPresentation = new Presentation
{
Name = model.Name,
Description = model.Description,
UserPresentations = new List <UserPresentation>(),
CategoryId = model.CategoryId,
PresentationTags = new List <PresentationTag>(),
IsPublic = model.IsPublic
};
var saveResult = await _filesRepository.SaveFile(model.SourceStream);
if (saveResult.ErrorMessageIfAny != null)
{
return(saveResult);
}
currentPresentation.FileID = saveResult.Value;
await _context.Presentations.AddAsync(currentPresentation);
foreach (var tag in tagsForPresentation)
{
var pt = new PresentationTag
{
Tag = tag,
Presentation = currentPresentation
};
tag.PresentationTags.Add(pt);
currentPresentation.PresentationTags.Add(pt);
}
var up = new UserPresentation
{
PresentationId = currentPresentation.Id,
UserId = userId
};
_context.UserPresentations.Add(up);
int rows = await _context.SaveChangesAsync();
if (rows > 0)
{
return(new OperationStatus());
}
return(new OperationStatus()
{
ErrorMessageIfAny = OperationStatus.kUnknownError
});
}
