public ViewResult Archive(ArchiveFilter filter = ArchiveFilter.Alphabet)
{
ArchiveArticlesViewModel model = new ArchiveArticlesViewModel(null, null)
{
Filter = filter,
};
List <ArticleTitle> articles = articleRepository.GetArticlesTitles();
model.ArticlesGroups = ArticleService.GroupArticles(articles, filter);
return(View(model));
}
public static List <ArticleTitleGroup> GroupArticles(List <ArticleTitle> articles, ArchiveFilter filter)
{
if (articles == null)
{
throw new ArgumentNullException("articles");
}
List <ArticleTitleGroup> articlesGroups = new List <ArticleTitleGroup>();
if (articles.Count() == 0)
{
return(articlesGroups);
}
if (filter == ArchiveFilter.Alphabet)
{
var grouped = articles
.GroupBy(x => x.Title[0])
.OrderBy(x => x.Key)
.ToList();
foreach (var group in grouped)
{
articlesGroups.Add(new ArticleTitleGroup
{
Articles = group.ToList(),
GroupName = group.Key.ToString(),
});
}
}
else if (filter == ArchiveFilter.Date)
{
var grouped = articles
.OrderByDescending(x => x.CreationDate)
.GroupBy(x => x.CreationDate.Year)
.ToList();
foreach (var group in grouped)
{
articlesGroups.Add(new ArticleTitleGroup
{
Articles = group.ToList(),
GroupName = group.Key.ToString(),
});
}
}
return(articlesGroups);
}