private IQueryable <Book> Filter(BookPaginationParams bookParams)
{
return(FindByExpression(book =>
(book.publishDate >= bookParams.MinDateTime) &&
(book.publishDate <= bookParams.MaxDateTime) &&
((bookParams.minPrice == null || book.Price >= bookParams.minPrice)) &&
((bookParams.maxPrice == null || book.Price <= bookParams.maxPrice)) &&
(bookParams.BookCategories == null || bookParams.BookCategories.Where(b => b.Equals(book.Category)).Any()) &&
(string.IsNullOrEmpty(bookParams.AuthorId) || book.AuthorId == bookParams.AuthorId)));
}
public static BookPaginationParams ConvertToBookPagination(this BookPaginationParams _params, HttpContext context)
{
_params.Pagenumber = int.Parse(context.Request.Headers["PageNumber"]);
_params.Pagesize = int.Parse(context.Request.Headers["PageSize"]);
_params.MinDateTime = DateTime.Parse(context.Request.Headers["minDateTime"]);
_params.MaxDateTime = DateTime.Parse(context.Request.Headers["maxDateTime"]);
_params.BookCategories = context.Request.Headers["BookCategories"].Select(item => (BookCategoryEnum)int.Parse(item)).ToList();
_params.maxPrice = int.Parse(context.Request.Headers["maxPrice"]);
_params.minPrice = int.Parse(context.Request.Headers["minPrice"]);
return(_params);
}
public async Task <PagedList <Book> > GetBooksPerPage(BookPaginationParams pageParams)
{
var filteredSource = Filter(pageParams).Include(b => b.Imgs).Include(b => b.Author);
return(await PagedList <Book> .ToPagedList(filteredSource, pageParams.Pagenumber, pageParams.Pagesize));
}
