public static IPaginal Validate(this IPaginal paginal)
{
if (paginal.Page < 1)
{
throw new ArgumentException("Page parameter must be great than 0");
}
if (paginal.Take < 1)
{
throw new ArgumentException("Take parameter must be great than 0");
}
return(paginal);
}
private static async Task <TPager> PaginateAsync <TPager, TElement>(IQueryable <TElement> query, IPaginal paginal, TPager pager)
where TPager : IPaginated <TElement>
{
pager.Pager = new Paginator(paginal.Page, paginal.Take, await query.CountAsync());
pager.Items = await query.Paginate(paginal).ToListAsync();
return(pager);
}
private static TPager Paginate <TPager, TElement>(IQueryable <TElement> query, IPaginal paginal, TPager pager)
where TPager : IPaginated <TElement>
{
pager.Pager = new Paginator(paginal.Page, paginal.Take, query.Count());
pager.Items = query.Paginate(paginal).ToList();
return(pager);
}
public static async Task <TPager> PaginateToAsync <TPager, TElement>(this IQueryable <TElement> query, IPaginal paginal, TPager pager)
where TPager : IPaginated <TElement>
=> await PaginateAsync(query, paginal, pager);
public static async Task <TPager> PaginateToAsync <TPager, TElement>(this IQueryable <TElement> query, IPaginal paginal)
where TPager : IPaginated <TElement>, new()
=> await PaginateAsync(query, paginal, new TPager());
public static TPager PaginateTo <TPager, TElement>(this IQueryable <TElement> query, IPaginal paginal, TPager pager)
where TPager : IPaginated <TElement>
=> Paginate(query, paginal, pager);
public static TPager PaginateTo <TPager, TElement>(this IQueryable <TElement> query, IPaginal paginal)
where TPager : IPaginated <TElement>, new()
=> Paginate(query, paginal, new TPager());
public static IQueryable <T> Paginate <T>(this IQueryable <T> query, IPaginal paginal)
{
paginal.Validate();
return(query.Skip(paginal.Skip()).Take(paginal.Take));
}
public static int Skip(this IPaginal paginal) => paginal.Take * (paginal.Page - 1);
