TouchyTickets/TouchyTickets/SaveHandler.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Numerics;
using Newtonsoft.Json;

namespace TouchyTickets {
    public static class SaveHandler {

        public static readonly JsonSerializer Serializer = JsonSerializer.Create(new JsonSerializerSettings {
            TypeNameHandling = TypeNameHandling.Auto,
            Formatting = Formatting.Indented
        });
        private const int SaveVersion = 3;

        public static void Save(GameImpl game) {
            var file = GetSaveFile(true);
            using (var stream = new JsonTextWriter(file.CreateText())) {
                var data = new SaveData {
                    SaveVersion = SaveVersion,
                    Tickets = game.Tickets,
                    LastUpdate = game.LastUpdate,
                    Map = game.Map,
                    Stars = game.Stars,
                    TimesRestarted = game.TimesRestarted,
                    Upgrades = game.AppliedUpgrades.Select(u => u.Name).ToList(),
                    TutorialStep = game.Tutorial.CurrentStep,
                    ReadAnalyticsInfo = game.ReadAnalyticsInfo
                };
                Serializer.Serialize(stream, data);
            }
        }

        public static bool Load(GameImpl game) {
            var file = GetSaveFile(false);
            if (!file.Exists)
                return false;
            SaveData data;
            using (var stream = new JsonTextReader(file.OpenText()))
                data = Serializer.Deserialize<SaveData>(stream);

            game.Tickets = data.Tickets;
            game.LastUpdate = data.LastUpdate;
            game.Map = data.Map.Copy();
            game.Stars = data.Stars;
            game.TimesRestarted = data.TimesRestarted;
            game.AppliedUpgrades.Clear();
            foreach (var name in data.Upgrades)
                game.AppliedUpgrades.Add(Upgrade.Upgrades[name]);
            game.Tutorial.CurrentStep = data.TutorialStep;
            game.ReadAnalyticsInfo = data.ReadAnalyticsInfo;

            // version 1 had smaller maps
            if (data.SaveVersion <= 1) {
                game.Map = game.Map.Copy(20, 20);
                foreach (var upgrade in game.AppliedUpgrades.Intersect(Upgrade.MapSize))
                    upgrade.OnApplied();
            }
            // new tutorial additions need to be forced
            if (data.SaveVersion <= 2) {
                if (game.Tutorial.CurrentStep > 4)
                    game.Tutorial.CurrentStep = 4;
            }

            return true;
        }

        public static DirectoryInfo GetGameDirectory(bool create) {
            var path = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
            var dir = new DirectoryInfo(Path.Combine(path, "TouchyTickets"));
            if (!dir.Exists && create)
                dir.Create();
            return dir;
        }

        private static FileInfo GetSaveFile(bool create) {
            return new FileInfo(Path.Combine(GetGameDirectory(create).FullName, "Save"));
        }

    }

    public class SaveData {

        public int SaveVersion;
        public BigInteger Tickets;
        public DateTime LastUpdate;
        public ParkMap Map;
        public int Stars;
        public int TimesRestarted;
        public List<string> Upgrades;
        public int TutorialStep;
        public bool ReadAnalyticsInfo;

    }
}