protected async Task <File> Handle(IFileCommand request, CancellationToken cancellationToken)
{
await this.Authorize();
using (var lockResult = await _lockService.GetFileLock(request.Id).LockAsync(0))
{
if (!lockResult.AcquiredLock)
{
throw new FileConflictException();
}
var file = await _db.Files.FindAsync(request.Id);
if (file == null)
{
throw new EntityNotFoundException <File>();
}
await this.PerformOperation(file);
await _db.SaveChangesAsync(cancellationToken);
}
return(await _fileQuery.ExecuteAsync(request.Id));
}
private async Task <FileUpdateResult> UpdateFile(Domain.Models.File dbFile, Domain.Models.File file)
{
var result = new FileUpdateResult();
result.LockResult = await _lockService.GetFileLock(dbFile.Id).LockAsync(0);
// Don't need to update or throw error if contents haven't changed
if (!dbFile.Content.Equals(file.Content))
{
if (!result.LockResult.AcquiredLock)
{
result.UnableToLock = true;
result.FileUpdated = false;
}
else if (dbFile.CanLock(_userId, _isAdmin))
{
dbFile.Content = file.Content;
dbFile.Save(
_userId,
_isAdmin,
bypassLock: true);
result.FileUpdated = true;
result.UnableToLock = false;
}
else
{
result.FileUpdated = false;
result.UnableToLock = true;
}
}
return(result);
}
