public CommonResult<IEnumerable<NewsData>> GetFiltered(NewsFilterRequest filterRequest)
{
var newsCollection = _newsProvider.GetAllWithoutContent();
if(filterRequest.Tags != null && filterRequest.Tags.Any())
{
newsCollection = FilterByTags(filterRequest, newsCollection);
}
if (filterRequest.Authors != null && filterRequest.Authors.Any())
{
newsCollection = FilterByAuthors(filterRequest, newsCollection);
}
if (filterRequest.Query.NotNullNorEmpty())
{
newsCollection = FilterByQuery(filterRequest, newsCollection);
}
if (newsCollection.Any())
{
return CommonResult<IEnumerable<NewsData>>.Success(newsCollection);
}
else
{
return CommonResult<IEnumerable<NewsData>>.Failure("Nie znaleziono newsów spełniających podane kryteria.");
}
}
private static IEnumerable<NewsData> FilterByAuthors(NewsFilterRequest filterRequest, IEnumerable<NewsData> newsCollection)
{
return newsCollection.Where(news => filterRequest.Authors.Contains(news.Author));
}
private static IEnumerable<NewsData> FilterByQuery(NewsFilterRequest filterRequest, IEnumerable<NewsData> newsCollection)
{
return newsCollection.Where(news => news.Title.ToLower().Contains(filterRequest.Query.ToLower()));
}
private static IEnumerable<NewsData> FilterByTags(NewsFilterRequest filterRequest, IEnumerable<NewsData> newsCollection)
{
return newsCollection.Where(news => filterRequest.Tags.All(x => news.Tags.Contains(x)));
}