Availability Hash Tables

Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Newtonsoft.Json.Linq;

namespace AvailabilityMatrix
{
    class Program
    {
        static void Main(string[] args)
        {
            var jsonString = "{\"3263\": [\"OMF\", \"LDF\", \"LDB\"],\"3227\": [\"OMF\", \"LDF\"],\"3401\": [\"OMF\"],\"3428\": [\"OMF\", \"OMB\"]}";

            Dictionary<string, List<string>> colorToType, typeToColor;

            GetAvailabilityDictionaries(jsonString, out colorToType, out typeToColor);

            var fakeFullyShotType = "OMF";
            var fakeDisplayColor = "3227";

            if (colorToType.ContainsKey(fakeDisplayColor) && colorToType[fakeDisplayColor].Contains(fakeFullyShotType))
            {
                Console.WriteLine("Image exists for color {0}, type {1}", fakeDisplayColor, fakeFullyShotType);
            }
        }

        public static void GetAvailabilityDictionaries(string jsonString, out Dictionary<string, List<string>> colorToType,
            out Dictionary<string, List<string>> typeToColor)
        {
            colorToType = new Dictionary<string, List<string>>();
            typeToColor = new Dictionary<string, List<string>>();
            var colors = new List<string>();

            var json = JObject.Parse(jsonString);

            foreach (var color in json.Children())
            {
                var colorId = color.Path;
                colors.Add(colorId);

                var typesList = new List<string>();

                typesList.AddRange(color.Values().Select(c => c.Value<string>()));

                colorToType.Add(colorId, typesList);

                foreach (var type in typesList)
                {
                    if (typeToColor.ContainsKey(type))
                    {
                        var currentList = typeToColor[type];
                        if (!currentList.Contains(colorId))
                        {
                            currentList.Add(colorId);
                        }

                    }
                    else
                    {
                        typeToColor.Add(type, new List<string>() { colorId });
                    }
                }
            }
        }
    }
}