public async Task <IEnumerable <BookRent> > GetBookRentsAsync(BookRentFilterViewModel bookRentFilterViewModel)
{
var filters = new List <Expression <Func <BookRent, bool> > >();
if (!string.IsNullOrEmpty(bookRentFilterViewModel.BookFilter))
{
Expression <Func <BookRent, bool> > bookFilterExp = x =>
x.Book.Title.Contains(bookRentFilterViewModel.BookFilter) ||
x.Book.Author.Contains(bookRentFilterViewModel.BookFilter);
filters.Add(bookFilterExp);
}
if (!string.IsNullOrEmpty(bookRentFilterViewModel.NameFilter))
{
Expression <Func <BookRent, bool> > nameFilterExp = x =>
x.Customer.LastName.Contains(bookRentFilterViewModel.NameFilter) ||
x.Customer.FirstName.Contains(bookRentFilterViewModel.NameFilter) ||
x.Customer.Patronymic.Contains(bookRentFilterViewModel.NameFilter);
filters.Add(nameFilterExp);
}
if (bookRentFilterViewModel.RentStatusFilter != RentStatusEnum.All)
{
Expression <Func <BookRent, bool> > statusFilterExp;
if (bookRentFilterViewModel.RentStatusFilter == RentStatusEnum.InRent)
{
statusFilterExp = x => x.FactEndRent == null;
}
else
{
// RentStatusEnum.RentExpired
statusFilterExp = x => x.PlanEndRent < DateTime.Now && x.FactEndRent == null;
}
filters.Add(statusFilterExp);
}
IQueryable <BookRent> query = _bookRent.GetAll();
if (filters.Count > 0)
{
Expression <Func <BookRent, bool> > resultFilter = filters.OrTheseFiltersTogether();
return(await query.Where(resultFilter).ToListAsync());
}
return(await query.ToListAsync());
}
public async Task <IActionResult> List(BookRentFilterViewModel bookRentFilterViewModel) => Ok(await _bookRentService.GetBookRentsAsync(bookRentFilterViewModel));