Comment ICommentsService.CreateComment(Comment comment)
{
// Validate the stars quantity (range 1-5)
if (comment.Stars < 1 || comment.Stars > 5)
{
throw new AlreadyExistsException("The valid star range is between 1 and 5");
}
// Validating that it's the only comment for the idea
var newComment = _commentsRepository.GetCommentGivenAnUserAndAnIdea(comment.GivenBy, comment.GivenTo);
if (newComment != null)
{
throw new AlreadyExistsException("This user has already commented on this idea");
}
// Validating that Comment is posted to ideas of a different user.
var idea = _ideasRepository.GetIdeaById(comment.GivenTo);
if (idea != null)
{
if (comment.GivenBy == idea.ProposedBy)
{
throw new AlreadyExistsException("Comment can only be posted to ideas that were not created by the same user");
}
}
// Increasing +1 the number of Comments in Ideas
if (idea != null)
{
if (!_ideasRepository.IncreaseNumberOfComments(idea.Id))
{
throw new NotFoundException("Cannot find idea");
}
}
// Update the average of stars ----------------------------------------------------------------
if (idea != null)
{
long newAverageOfStars = _commentsRepository.GetNewAverageRegardingTheCurrentComment(idea.Id, comment.Stars);
if (!_ideasRepository.UpdateAverageStars(idea.Id, newAverageOfStars))
{
throw new NotFoundException("Cannot find idea");
}
}
// --------------------------------------------------------------------------------------------
newComment = _commentsRepository.CreateComment(comment);
return(newComment);
}