/// <summary>
/// Get List of Movie by search params
/// </summary>
/// <param name="q">match title</param>
/// <param name="genre">match genre</param>
/// <param name="year">match year</param>
/// <param name="rating">match rating</param>
/// <param name="actorId">match Actor ID</param>
/// <param name="offset">page offset</param>
/// <param name="limit">page size</param>
/// <returns>List of Movie</returns>
public Task <IEnumerable <Movie> > GetMoviesAsync(string q, string genre, int year = 0, double rating = 0.0, string actorId = "", int offset = 0, int limit = 100)
{
List <Movie> res = new List <Movie>();
int skip = 0;
bool add = false;
// Use the year or Genre search if possible
if ((year > 0 || !string.IsNullOrWhiteSpace(genre)) &&
!(year > 0 && !string.IsNullOrWhiteSpace(genre)) &&
string.IsNullOrWhiteSpace(q) &&
rating == 0 &&
string.IsNullOrWhiteSpace(actorId) &&
offset == 0)
{
// search by year only
if (year > 0)
{
if (YearIndex.ContainsKey(year))
{
foreach (Movie m in YearIndex[year])
{
res.Add(m);
if (res.Count >= limit)
{
break;
}
}
}
}
// search by Genre only
else if (!string.IsNullOrWhiteSpace(genre))
{
genre = genre.ToLowerInvariant().Trim();
if (GenreIndex.ContainsKey(genre))
{
foreach (Movie m in GenreIndex[genre])
{
if (res.Count < limit)
{
res.Add(m);
}
else
{
break;
}
}
}
}
}
// search by other and/or multiple criteria
else
{
foreach (Movie m in Movies)
{
if ((string.IsNullOrWhiteSpace(q) || m.TextSearch.Contains(q, StringComparison.OrdinalIgnoreCase)) &&
(string.IsNullOrWhiteSpace(genre) || m.Genres.Contains(genre, StringComparer.OrdinalIgnoreCase)) &&
(year < 1 || m.Year == year) &&
(rating <= 0 || m.Rating >= rating))
{
add = true;
if (!string.IsNullOrWhiteSpace(actorId))
{
add = false;
actorId = actorId.Trim().ToLowerInvariant();
foreach (Role a in m.Roles)
{
if (a.ActorId == actorId)
{
add = true;
break;
}
}
}
if (add)
{
if (skip >= offset)
{
res.Add(m);
if (res.Count >= limit)
{
break;
}
}
else
{
skip++;
}
}
}
}
}
return(Task <IEnumerable <Movie> > .Factory.StartNew(() => { return res; }));
}
/// <summary>
/// Initializes a new instance of the <see cref="InMemoryDal"/> class.
/// </summary>
public InMemoryDal()
{
JsonSerializerOptions settings = new JsonSerializerOptions
{
PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
};
if (Actors?.Count == null)
{
// load the data from the json file
Actors = JsonSerializer.Deserialize <List <Actor> >(File.ReadAllText("data/actors.json"), settings);
// sort by Name
Actors.Sort(Actor.NameCompare);
}
if (ActorsIndex.Count == 0)
{
// Loads an O(1) dictionary for retrieving by ID
// Could also use a binary search to reduce memory usage
foreach (Actor a in Actors)
{
ActorsIndex.Add(a.ActorId, a);
}
}
if (Movies?.Count == null)
{
// load the data from the json file
Movies = JsonSerializer.Deserialize <List <Movie> >(File.ReadAllText("data/movies.json"), settings);
// sort by Title
Movies.Sort(Movie.TitleCompare);
}
string ge;
if (MoviesIndex.Count == 0)
{
foreach (Movie m in Movies)
{
// Loads an O(1) dictionary for retrieving by ID
// Could also use a binary search to reduce memory usage
MoviesIndex.Add(m.MovieId, m);
// Add to by year dictionary
if (!YearIndex.ContainsKey(m.Year))
{
YearIndex.Add(m.Year, new List <Movie>());
}
YearIndex[m.Year].Add(m);
// Add to by Genre dictionary
foreach (string g in m.Genres)
{
ge = g.ToLowerInvariant().Trim();
if (!GenreIndex.ContainsKey(ge))
{
GenreIndex.Add(ge, new List <Movie>());
}
GenreIndex[ge].Add(m);
}
}
}
if (Genres.Count == 0)
{
// load the data from the json file
List <Genre> list = JsonSerializer.Deserialize <List <Genre> >(File.ReadAllText("data/genres.json"), settings);
// Convert Genre object to List<string> per API spec
foreach (Genre g in list)
{
Genres.Add(g.Name);
}
Genres.Sort();
}
}
public InMemoryDal()
{
JsonSerializerSettings settings = new JsonSerializerSettings
{
ContractResolver = new DefaultContractResolver {
NamingStrategy = new CamelCaseNamingStrategy()
},
};
// load the data from the json files
Actors = JsonConvert.DeserializeObject <List <Actor> >(File.ReadAllText("data/actors.json"), settings);
// sort by Name
Actors.Sort(Actor.NameCompare);
// Loads an O(1) dictionary for retrieving by ID
// Could also use a binary search to reduce memory usage
foreach (Actor a in Actors)
{
ActorsIndex.Add(a.ActorId, a);
}
Movies = JsonConvert.DeserializeObject <List <Movie> >(File.ReadAllText("data/movies.json"), settings);
// sort by Title
Movies.Sort(Movie.TitleCompare);
string ge;
foreach (Movie m in Movies)
{
// Loads an O(1) dictionary for retrieving by ID
// Could also use a binary search to reduce memory usage
MoviesIndex.Add(m.MovieId, m);
// Create a dictionary by year
if (!YearIndex.ContainsKey(m.Year))
{
YearIndex.Add(m.Year, new List <Movie>());
}
YearIndex[m.Year].Add(m);
// Create a dictionary by Genre
foreach (string g in m.Genres)
{
ge = g.ToLowerInvariant().Trim();
if (!GenreIndex.ContainsKey(ge))
{
GenreIndex.Add(ge, new List <Movie>());
}
GenreIndex[ge].Add(m);
}
}
List <dynamic> list = JsonConvert.DeserializeObject <List <dynamic> >(File.ReadAllText("data/genres.json"), settings);
// Convert Genre object to List<string> per API spec
Genres = new List <string>();
foreach (dynamic g in list)
{
Genres.Add(g["genre"].Value);
}
Genres.Sort();
}