public bool RemoveImageById(Guid imageId)
{
if (imageId == null)
{
throw new ArgumentNullException("image id is null");
}
foreach (var userId in relationsDAL.GetUsersIdsByImageId(imageId).ToArray())
{
relationsDAL.RemoveRelation(userId, imageId);
}
return(imagesDAL.RemoveImageById(imageId));
}
public bool RemoveUserById(Guid userId)
{
if (userId == null)
{
throw new ArgumentNullException("user id is null");
}
foreach (var awardId in relationsDAL.GetImagesIdsByUserId(userId).ToArray())
{
relationsDAL.RemoveRelation(userId, awardId);
}
return(usersDAL.RemoveUserById(userId));
}
public bool RemoveImageFromUser(Guid userId, Guid imageId)
{
if (userId == null || imageId == null)
{
throw new ArgumentNullException("one of the relation ids are null");
}
if (!IsRelationExist(userId, imageId))
{
throw new ArgumentException("one of the ids are incorrect, user or award doesn't exist");
}
foreach (var user in GetUsersByImage(imageId))
{
if (user.Id == userId)
{
return(relationsDAL.RemoveRelation(userId, imageId));
}
}
return(false);
}
