/// <summary>
/// Конструктор.
/// </summary>
/// <param name="source">Источник.</param>
/// <param name="query">Запрос.</param>
/// <param name="sortPosts">Сортировать посты.</param>
public FilteredPostCollection(IPostCollectionViewModel source, IPostCollectionSearchQuery query, bool sortPosts = true)
{
if (source == null) throw new ArgumentNullException(nameof(source));
if (query == null) throw new ArgumentNullException(nameof(query));
Source = source;
Query = query;
MergeAndSortPosts = sortPosts;
Source.PostsUpdated += SourceOnPostsUpdated;
SetPosts();
}
/// <summary>
/// Получить отфильтрованный список постов.
/// </summary>
/// <param name="src">Список постов.</param>
/// <param name="query">Запрос.</param>
/// <param name="sortPosts">Сортировать посты.</param>
/// <returns>Результат.</returns>
public static IFilteredPostCollection FilterPosts(this IPostCollectionViewModel src, IPostCollectionSearchQuery query, bool sortPosts = true)
{
return new FilteredPostCollection(src, query, sortPosts);
}
/// <summary>
/// Найти пост.
/// </summary>
/// <param name="src">Спиок постов.</param>
/// <param name="query">Запрос.</param>
/// <returns>Результат.</returns>
public static IPostViewModel FindPost(this IPostCollectionViewModel src, IPostCollectionSearchQuery query)
{
return src.Posts.FirstOrDefault(query.Filter);
}
