/**
* Get the IDs of discussions which a user has read completely.
*
* @param \Flarum\Core\Models\User $user
* @return array
*/
public function getReadIds(User $user)
{
return Discussion::leftJoin('users_discussions', 'users_discussions.discussion_id', '=', 'discussions.id')->where('user_id', $user->id)->where('read_number', '<', 'last_post_number')->lists('id');
}
