public void CreateLike(Like like)
{
if(like == null)
{
throw new ArgumentNullException("like");
}
dbContext.Likes.Add(like);
}
public void UpdateLike(Like like)
{
if(like == null)
{
throw new ArgumentNullException("like");
}
var existLike = dbContext.Likes.FirstOrDefault(x => x.LikeId == like.LikeId);
if(existLike == null)
{
throw new InvalidDataException("this like doesn't exist in current data base");
}
CopyLikeProperties(like,existLike);
}
private void CopyLikeProperties(Like fromLike, Like toLike)
{
if(fromLike == null)
{
throw new ArgumentNullException("fromLike");
}
if (toLike == null)
{
throw new ArgumentNullException("toLike");
}
toLike.CreateDate = fromLike.CreateDate;
toLike.PresentationId = fromLike.PresentationId;
toLike.UserId = fromLike.UserId;
}
public void DeleteLike(Like like)
{
if(like == null)
{
throw new ArgumentNullException("like");
}
var existLike = dbContext.Likes.FirstOrDefault(x => x.LikeId == like.LikeId);
if(existLike == null)
{
throw new InvalidDataException("this like doesn't exist in the current data base");
}
dbContext.Likes.Remove(existLike);
}
