/// <summary>
/// filters the list of films based on the provided parameters using custom filters
/// </summary>
/// <param name="films"></param>
/// <param name="parameters">contains parameters required for filtering</param>
/// <returns></returns>
public FilmListServiceDto Filter(List <Film> films, FilmListServiceDto parameters)
{
var result = new List <Film>();
_filtersTypes.FilterByQuery(parameters.QuerySearch, films, result);
_filtersTypes.FilterByGenre(parameters.Genres, films, result);
_filtersTypes.FilterByCountry(parameters.Countries, films, result);
parameters.Films = result;
return(parameters);
}
/// <summary>
/// returns list of films based on provided parameters
/// </summary>
/// <param name="filmListParametersDto">contains parameters required to filter/sort list of films</param>
/// <returns></returns>
public FilmListServiceDto GetFilms(FilmListServiceDto filmListParametersDto)
{
var filmsFromDb = _unitOfWork.Films.GetAll();
if (!ListOfFilterParameters.CheckParameters(filmListParametersDto))
{
filmListParametersDto.MaxPageNumber = GetMaxPageNumber(filmsFromDb.Count, filmListParametersDto.PageSize);
filmListParametersDto.Films = _pagination.PerformPagination(filmsFromDb, filmListParametersDto);
return filmListParametersDto;
}
var result = _filmFiler.Filter(filmsFromDb, filmListParametersDto);
result.MaxPageNumber = GetMaxPageNumber(result.Films.Count, filmListParametersDto.PageSize);
result.Films = _pagination.PerformPagination(result.Films, filmListParametersDto);
return result;
}
//Add additional methods to check the if statement here
public static bool CheckParameters(FilmListServiceDto parameters)
{
return(CheckGenres(parameters) || CheckCountries(parameters) || CheckSearch(parameters));
}
private static bool CheckSearch(FilmListServiceDto parameters)
{
return(!string.IsNullOrWhiteSpace(parameters.QuerySearch));
}
private static bool CheckCountries(FilmListServiceDto parameters)
{
return(parameters.Countries.Any());
}
private static bool CheckGenres(FilmListServiceDto parameters)
{
return(parameters.Genres.Any());
}
public List <Film> PerformPagination(List <Film> films, FilmListServiceDto parameters)
{
films = films.Skip(parameters.PageSize * (parameters.PageNumber - 1)).Take(parameters.PageSize).ToList();
return(films);
}
