public TVShowsListViewModel RemoveAlreadySeenTvShows(TVShowsListViewModel potentiallyRecommendedTvShows, UserSeenTvShowListViewModel seenTvShows)
{
TVShowsListViewModel result = new TVShowsListViewModel();
result.TVShows = potentiallyRecommendedTvShows.TVShows.Where(tvShow => seenTvShows.UserSeenTvShows.All(seenTvShow => tvShow.Id != seenTvShow.TvShowId)).ToList();
return(result);
}
public TVShowsViewModel findMostFrequentTvShows(TVShowsListViewModel tvShows)
{
TVShowsViewModel tvShow = null;
tvShow = tvShows.TVShows.GroupBy(value => value.Id).OrderByDescending(group => group.Count()).SelectMany(group => group).First();
return(tvShow);
}
public TVShowsListViewModel CombineFoundTvShows(TVShowsListViewModel tvShowsWithFavoriteGenre, TVShowsListViewModel tvShowsWithFavoriteDirector, TVShowsListViewModel tvShowsWithFavoriteYears)
{
TVShowsListViewModel result = new TVShowsListViewModel();
result.TVShows = (tvShowsWithFavoriteGenre.TVShows.Concat(tvShowsWithFavoriteDirector.TVShows)).ToList().Concat(tvShowsWithFavoriteYears.TVShows).ToList();
return(result);
}
public TVShowsListViewModel LaunchBranchYear(UserSeenTvShowListViewModel userSeenTvShows, TVShowsListViewModel tvShows)
{
TVShowsListViewModel tvShowsWithFavoriteYears = new TVShowsListViewModel();
List <int> favoriteYears = findFavoriteYears(userSeenTvShows, tvShows);
tvShowsWithFavoriteYears = findtvShowsWithFavoriteYears(favoriteYears, tvShows);
return(tvShowsWithFavoriteYears);
}
public TVShowsListViewModel LaunchBranchDirector(UserSeenTvShowListViewModel userSeenTvShows, TVShowsListViewModel tvShows)
{
TVShowsListViewModel tvShowsWithFavoriteDirector = new TVShowsListViewModel();
List <string> favoriteDirector = findFavoriteDirector(userSeenTvShows, tvShows);
tvShowsWithFavoriteDirector = findtvShowsWithFavoriteDirectors(favoriteDirector, tvShows);
return(tvShowsWithFavoriteDirector);
}
public TVShowsListViewModel LaunchBranchGenre(UserSeenTvShowListViewModel userSeenTvShows, TVShowsListViewModel tvShows)
{
TVShowsListViewModel tvShowsWithFavoriteGenre = new TVShowsListViewModel();
List <string> favoriteGenre = findFavoriteGenre(userSeenTvShows, tvShows);
tvShowsWithFavoriteGenre = findtvShowsWithFavoriteGenre(favoriteGenre, tvShows);
return(tvShowsWithFavoriteGenre);
}
public bool checkIfAllTvShowsAreSeen(TVShowsListViewModel tvShows, UserSeenTvShowListViewModel userSeenTvShows)
{
if (tvShows.TVShows.Count == userSeenTvShows.UserSeenTvShows.Count)
{
return(true);
}
return(false);
}
public TVShowsListViewModel findtvShowsWithFavoriteGenre(List <string> favoriteGenres, TVShowsListViewModel tvShows)
{
TVShowsListViewModel foundTvShows = new TVShowsListViewModel();
foundTvShows.TVShows = (from tvShow in tvShows.TVShows
where favoriteGenres.Contains(tvShow.Genre) == true
select tvShow).ToList();
return(foundTvShows);
}
public TVShowsListViewModel findtvShowsWithFavoriteYears(List <int> favoriteYears, TVShowsListViewModel tvShows)
{
TVShowsListViewModel foundTvShows = new TVShowsListViewModel();
foundTvShows.TVShows = (from tvShow in tvShows.TVShows
where favoriteYears.Contains(tvShow.ReleaseYear) == true
select tvShow).ToList();
return(foundTvShows);
}
public TVShowsViewModel findRandomOrUnreleasedTvShow(TVShowsListViewModel tvShows)
{
if (tvShows.TVShows.Count() > 0)
{
var random = new Random();
TVShowsViewModel tvShow = null;
int index = random.Next(tvShows.TVShows.Count);
tvShow = tvShows.TVShows[index];
return(tvShow);
}
else
{
return(null);
}
}
public async Task <TVShowsListViewModel> GetAllTVShows()
{
try
{
var model = new TVShowsListViewModel()
{
TVShows = _mapper.Map <List <TVShowsViewModel> >(_context.TVShows)
};
return(model);
}
catch (Exception e)
{
throw e.InnerException;
}
}
public async Task <(TVShowsViewModel, string)> GetRecommededTvShowAsync(int userId)
{
TVShowsListViewModel tvShows;
UserSeenTvShowListViewModel userSeenTvShows;
(TVShowsViewModel, string)tvShowAndMessage;
TVShowsListViewModel newTvShows = new TVShowsListViewModel();
TVShowsListViewModel oldTvShows = new TVShowsListViewModel();
tvShows = await GetTvShowsAsync();
userSeenTvShows = await GetUserSeenTvShowsAsync(userId);
tvShowAndMessage.Item1 = null;
tvShowAndMessage.Item2 = "No information is given";
if (tvShows.TVShows.Count == 0)
{
tvShowAndMessage.Item2 = "No tv shows in data base.";
return(tvShowAndMessage);
}
if (userSeenTvShows.UserSeenTvShows.Count == 0)
{
tvShowAndMessage.Item2 = "Tv show watching history is empty. Showing random tv show!";
tvShowAndMessage.Item1 = findRandomOrUnreleasedTvShow(tvShows);
return(tvShowAndMessage);
}
oldTvShows.TVShows = tvShows.TVShows.Where(x => x.ReleaseYear <= DateTime.Now.Year).ToList();
newTvShows.TVShows = tvShows.TVShows.Where(x => x.ReleaseYear > DateTime.Now.Year).ToList();
bool areAllTvShowsSeen = checkIfAllTvShowsAreSeen(oldTvShows, userSeenTvShows);
if (areAllTvShowsSeen == false)
{
tvShowAndMessage.Item2 = "Not all released tv shows are seen!";
TVShowsListViewModel tvShowsWithFavoriteGenre = new TVShowsListViewModel();
TVShowsListViewModel tvShowsWithFavoriteDirector = new TVShowsListViewModel();
TVShowsListViewModel tvShowsWithFavoriteYears = new TVShowsListViewModel();
Parallel.Invoke(
() => tvShowsWithFavoriteGenre = LaunchBranchGenre(userSeenTvShows, tvShows),
() => tvShowsWithFavoriteDirector = LaunchBranchDirector(userSeenTvShows, tvShows),
() => tvShowsWithFavoriteYears = LaunchBranchYear(userSeenTvShows, tvShows)
);
TVShowsListViewModel foundTvShows = new TVShowsListViewModel();
foundTvShows = CombineFoundTvShows(tvShowsWithFavoriteGenre, tvShowsWithFavoriteDirector, tvShowsWithFavoriteYears);
foundTvShows = RemoveAlreadySeenTvShows(foundTvShows, userSeenTvShows);
if (foundTvShows.TVShows.Count > 0)
{
tvShowAndMessage.Item1 = findMostFrequentTvShows(foundTvShows);
}
else
{
tvShowAndMessage.Item2 = "All recommended tv shows are seen! No unreleased tv shows to show!";
tvShowAndMessage.Item1 = findRandomOrUnreleasedTvShow(newTvShows);
}
}
else
{
tvShowAndMessage.Item2 = "All tv shows are seen! No unreleased tv shows to show!";
//if (tvShows.)
tvShowAndMessage.Item1 = findRandomOrUnreleasedTvShow(newTvShows);
}
return(tvShowAndMessage);
}
public List <int> findFavoriteYears(UserSeenTvShowListViewModel userSeenTvShows, TVShowsListViewModel tvShows)
{
var seenTvShowsWithYears = (from objA in tvShows.TVShows
join objB in userSeenTvShows.UserSeenTvShows on objA.Id equals objB.TvShowId
select objA /*or objB*/).ToList();
var pairs = seenTvShowsWithYears.GroupBy(value => value.ReleaseYear).OrderByDescending(group => group.Count());
int modeCount = pairs.First().Count();
List <int> favoriteYears = pairs.Where(pair => pair.Count() == modeCount)
.Select(pair => pair.Key)
.ToList();
return(favoriteYears);
}
public List <string> findFavoriteGenre(UserSeenTvShowListViewModel userSeenTvShows, TVShowsListViewModel tvShows)
{
List <string> favoriteGenres = new List <string>();
var seenTvShowsWithGenres = (from objA in tvShows.TVShows
join objB in userSeenTvShows.UserSeenTvShows on objA.Id equals objB.TvShowId
select objA).ToList();
var pairs = seenTvShowsWithGenres.GroupBy(value => value.Genre).OrderByDescending(group => group.Count());
int modeCount = pairs.First().Count();
favoriteGenres = pairs.Where(pair => pair.Count() == modeCount).Select(pair => pair.Key).ToList();
return(favoriteGenres);
}
