public static IEnumerable <T> Paginate <T>(this IEnumerable <T> queryable, int page, int count)
{
ContractUtil.IsInRange(page, 1);
ContractUtil.IsInRange(count, 1);
return(queryable.Skip((page - 1) * count).Take(count));
}
/// <summary>
/// Retrieve the posts that will be show to a given user.
/// </summary>
/// <param name="user">An user.</param>
/// <param name="page">The page number.</param>
/// <param name="count">The posts count.</param>
/// <returns></returns>
public IList <Post> GetPosts(User user, int page = 1, int count = 10)
{
ContractUtil.NotNull(user);
ContractUtil.IsInRange(page, 1);
ContractUtil.IsInRange(count, 1);
var postRepository = _unitOfWork.Posts;
return(user.Friends.SelectMany(postRepository.FindPostsTo)
.Where(post => post.IsPersonal)
.Concat(postRepository.FindPostsTo(user))
.OrderByDescending(post => post.Date)
.Paginate(page, count)
.ToList());
}