private IDataResult <List <BookDetailDto> > CheckParametres(int writerId, int publisherId, int categoryId)
{
if (writerId > 0 && publisherId > 0 && categoryId > 0)
{
return(new SuccessDataResult <List <BookDetailDto> >(_bookDal.GetBooksByFilter(b => b.WriterId == writerId && b.PublisherId == publisherId && b.CategoryId == categoryId)));
}
else if (writerId > 0 && publisherId > 0)
{
return(new SuccessDataResult <List <BookDetailDto> >(_bookDal.GetBooksByFilter(b => b.WriterId == writerId && b.PublisherId == publisherId)));
}
else if (categoryId > 0 && publisherId > 0)
{
return(new SuccessDataResult <List <BookDetailDto> >(_bookDal.GetBooksByFilter(b => b.CategoryId == categoryId && b.PublisherId == publisherId)));
}
else if (categoryId > 0 && writerId > 0)
{
return(new SuccessDataResult <List <BookDetailDto> >(_bookDal.GetBooksByFilter(b => b.CategoryId == categoryId && b.WriterId == writerId)));
}
else if (publisherId > 0)
{
return(new SuccessDataResult <List <BookDetailDto> >(_bookDal.GetBooksByFilter(b => b.PublisherId == publisherId)));
}
else if (categoryId > 0)
{
return(new SuccessDataResult <List <BookDetailDto> >(_bookDal.GetBooksByFilter(b => b.CategoryId == categoryId)));
}
else if (writerId > 0)
{
return(new SuccessDataResult <List <BookDetailDto> >(_bookDal.GetBooksByFilter(b => b.WriterId == writerId)));
}
else if (writerId == 0 && categoryId == 0 && publisherId == 0)
{
return(new SuccessDataResult <List <BookDetailDto> >(_bookDal.GetBookDetailsDto()));
}
return(new ErrorDataResult <List <BookDetailDto> >(Messages.ParametersNotFound));
}