public async Task <IEnumerable <DishPreviewDto> > GetDishesByIngredients(FilterRequest filterRequest)
{
var dishComparer = GenericEqualityComparer <Dish> .GetEqualityComparer((d1, d2) => d1.Id == d2.Id, d => d.Id);
var query = (await(filterRequest.IncludeIngredients?.Any() ?? false
? _unitOfWork.Dishes.GetByIngredientsAsync(filterRequest.IncludeIngredients)
: _unitOfWork.Dishes.GetDishesWithIngredientsCategoriesAndRatingsAsync(null, null))).AsQueryable();
query = query.Where(d => d.Name.IndexOf(filterRequest.Name, StringComparison.InvariantCultureIgnoreCase) != -1);
query = filterRequest.ExcludeIngredients?.Any() ?? false
? query.Except(await _unitOfWork.Dishes.GetByIngredientsAsync(filterRequest.ExcludeIngredients), dishComparer)
: query;
query = filterRequest.IncludeIngredients?.Any() ?? false
? query.Where(
res => res.DishIngredients.Select(di => di.IngredientId)
.Intersect(filterRequest.IncludeIngredients)
.Count()
/ (double)filterRequest.IncludeIngredients.Count()
>= 0.5)
: query;
return(query.Select(_mapper.Map <Dish, DishPreviewDto>)
.ToList());
}
