additional functions to asynchronously load data MSP Boot Camp 2013

MoviesDataSource-additional.cs

public static async Task LoadLocalDataAsync()
{
    // Retrieve recipe data from Recipes.txt
    var file = await Package.Current.InstalledLocation.GetFileAsync("Assets\\movies.json");
    var result = await FileIO.ReadTextAsync(file);

    // Parse the JSON recipe data
    var movies = JsonArray.Parse(result);

    // Convert the JSON objects into RecipeDataItems and RecipeDataGroups
    CreateMoviesDataAndGroups(movies);
}

private static void CreateMoviesDataAndGroups(JsonArray array)
{
    foreach (var item in array)
    {
        var obj = item.GetObject();
        MovieDataItem movie = null;
        MovieDataYear group = null;

        string uniqueId, title, description, contentRating, posterImagePath;
        uniqueId = title = description = contentRating = posterImagePath = string.Empty;
        DateTime datePublished = new DateTime();
        int duration = 0;
        string[] genres = new string[0];

        foreach (var key in obj.Keys)
        {
            IJsonValue val;
            if (!obj.TryGetValue(key, out val))
                continue;

            switch (key)
            {
                case "name":
                    title = val.GetString();
                    break;
                case "description":
                    description = val.GetString();
                    break;
                case "contentRating":
                    contentRating = val.GetString();
                    break;
                case "duration":
                    JsonValueType type = val.ValueType;
                    
                    if(type != JsonValueType.Number){
                        duration = 0;
                    }
                    break;
                case "genres":
                    string genresValue = val.GetString();
                    genres = genresValue.Split();
                    break;
                case "datePublished":
                    string dateValue = val.GetString();
                    DateTime date = DateTime.Parse(dateValue);
                    datePublished = date;
                    break;
                case "poster":
                    posterImagePath = val.GetString();
                    break;
            }
        }

        uniqueId = "Movie-" + title.Replace(" ", "-").Trim();

        var groupKey = datePublished.Year;
        group = _sampleDataSource.AllGroups.FirstOrDefault(c => c.Value.Equals(groupKey));

        if (group == null)
        {
            group = new MovieDataYear("Year-" + groupKey, groupKey.ToString(), groupKey);
            _sampleDataSource.AllGroups.Add(group);
        }

        movie = new MovieDataItem(uniqueId, title, description, genres,
            contentRating, datePublished, group,
            new TimeSpan(duration), posterImagePath);

        group.Items.Add(movie);
    }
}