public async Task <ActionResult <StudyContent> > PostStudyContent(StudyContent studyContent)
        {
            _context.StudyDB.Add(studyContent);
            await _context.SaveChangesAsync();

            return(CreatedAtAction("GetStudyContent", new { id = studyContent.GUID }, studyContent));
        }
        public async Task <ActionResult <StudyContent> > GetStudyContent(Guid id)
        {
            var studyContent = await _context.StudyDB.FindAsync(id);

            try
            {
                if (id == null)
                {
                    return(BadRequest());
                }

                string txtPath   = Environment.CurrentDirectory + "/Data/" + id + ".json";
                string studyFile = FileReader(txtPath);

                if (studyFile == null)
                {
                    return(NotFound());
                }
                StudyContent sc = JsonConvert.DeserializeObject <StudyContent>(studyFile);
                return(Ok(sc));
            }
            catch (Exception ex)
            {
                return(StatusCode(500, ex));
            }
        }
        public async Task <IActionResult> PutStudyContent(Guid id, StudyContent studyContent)
        {
            if (id != studyContent.GUID)
            {
                return(BadRequest());
            }

            _context.Entry(studyContent).State = EntityState.Modified;

            try
            {
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!StudyContentExists(id))
                {
                    return(NotFound());
                }
                else
                {
                    throw;
                }
            }

            return(NoContent());
        }