public FollowAsset FollowUnfollowAsset(int assetId, FollowActionType followActionType)
{
var user = GetValidUser();
var asset = AssetBusiness.GetById(assetId);
if (!asset.Enabled)
{
throw new BusinessException("Invalid asset.");
}
var followAsset = FollowAssetBusiness.Create(user.Id, assetId, followActionType);
if (user.FollowedAssets != null)
{
if (followActionType == FollowActionType.Follow)
{
user.FollowedAssets.Add(assetId);
}
else
{
user.FollowedAssets.Remove(assetId);
}
SetUserToCache(user);
}
return(followAsset);
}
