Added saving of buildings

Assets/Scripts/Game/Buildings/BuildingManager.cs

@@ -1,10 +1,17 @@
 using System.Collections.Generic;
+using JetBrains.Annotations;
+using UnityEngine.Scripting;
 using UnityEngine;
+using System;
+using System.IO;
+using System.Linq;
 
 namespace Fruitomation.Game
 {
     public class BuildingManager : MonoBehaviour
     {
+        [SerializeField] private BuildingRegistry Registry;
+        
         private class BuildingInfo
         {
             public BuildingInfo(Building b, RectTransform rt)
@@ -17,33 +24,108 @@ namespace Fruitomation.Game
             public RectTransform Rect { get; }
         }
 
+        [Serializable] private class SerializedBuilding
+        {
+            [SerializeField, Preserve, UsedImplicitly] public Vector2Int GridPosition;
+            [SerializeField, Preserve, UsedImplicitly] public Vector2Int Position;
+            [SerializeField, Preserve, UsedImplicitly] public string PrefabName;
+            [SerializeField, Preserve, UsedImplicitly] public bool IsFlipped;
+
+            public SerializedBuilding(Vector2Int gridPosition, Vector2Int pos, string name, bool flipped)
+            {
+                GridPosition = gridPosition;
+                IsFlipped = flipped;
+                PrefabName = name;
+                Position = pos;
+            }
+        }
+
+        [Serializable] private class SerializedBuildings
+        {
+            [SerializeField, Preserve, UsedImplicitly] private SerializedBuilding[] Buildings;
+            public SerializedBuilding[] Get() => Buildings;
+
+            public SerializedBuildings(List<SerializedBuilding> buildings) =>
+                Buildings = buildings.ToArray();
+        }
+        
+        private static string Filepath => Path.Combine(Application.persistentDataPath, "buildings.json");
+
         private bool[,] InhabitedCells { get; } = new bool[96, 49];
         private List<Building> Buildings { get; } = new();
-        
+
+        private void Start()
+        {
+            if (!File.Exists(Filepath))
+            {
+                return;
+            }
+
+            string json = File.ReadAllText(Filepath);
+            SerializedBuilding[] buildings = JsonUtility.FromJson<SerializedBuildings>(json).Get();
+
+            foreach (SerializedBuilding building in buildings)
+            {
+                GameObject prefab = Registry.GetBuildingOf(building.PrefabName);
+                GameObject go = Instantiate(prefab, transform);
+
+                BuildingInfo info = new
+                (
+                    go.GetComponent<Building>(),
+                    go.GetComponent<RectTransform>()
+                );
+                
+                info.Rect.transform.localScale = new Vector3(building.IsFlipped ? -1f : 1f, 1f, 1f);
+                info.Rect.sizeDelta = info.Building.SizeOnGrid * 40;
+                info.Rect.anchoredPosition = building.Position;
+                go.name = $"{building.PrefabName}";
+                
+                info.Building.Init(this, building.GridPosition, building.Position, building.IsFlipped);
+                Buildings.Add(info.Building);
+            }
+        }
+
+        private void OnDestroy()
+        {
+            Debug.Log($"Buildings: [{Buildings.Count}]");
+
+            List<SerializedBuilding> serialized = Buildings.Select(building => new SerializedBuilding
+                (
+                    building.GridPosition,
+                    building.Position,
+                    building.name,
+                    building.IsFlipped
+                )
+            ).ToList();
+
+            string json = JsonUtility.ToJson(new SerializedBuildings(serialized), false);
+            File.WriteAllText(Filepath, json);
+        }
+
         public void RemoveBuilding(Building building) => Buildings.Remove(building);
 
-        public bool AddBuildingAt(Vector2Int position, GameObject prefab, bool isFlipped)
+        public bool AddBuildingAt(Vector2Int position, BuildingRegistry.BuildingInfo building, bool isFlipped)
         {
             //
-            GameObject go = Instantiate(prefab, transform);
+            GameObject go = Instantiate(building.Prefab, transform);
             BuildingInfo info = new
             (
                 go.GetComponent<Building>(),
                 go.GetComponent<RectTransform>()
             );
-            
-            info.Building.SetManager(this);
+            go.name = $"{building.Name}";
 
             Vector2Int p0 = position * 40;
             Vector2Int p1 = p0 + new Vector2Int(20, 100);
 
             Vector2Int g0 = position + new Vector2Int(48, 24);
 
-            Vector2 off0 = info.Building.SizeOnGrid - Vector2.one;
-            Vector2 off1 = off0 * 20;
+            Vector2Int off0 = info.Building.SizeOnGrid - Vector2Int.one;
+            Vector2Int off1 = off0 * 20;
+            Vector2Int p2 = p1 + off1;
 
             info.Rect.sizeDelta = info.Building.SizeOnGrid * 40;
-            info.Rect.anchoredPosition = p1 + off1;
+            info.Rect.anchoredPosition = p2;
             
             info.Rect.transform.localScale = new Vector3(isFlipped ? -1f : 1f, 1f, 1f);
 
@@ -65,7 +147,9 @@ namespace Fruitomation.Game
                 InhabitedCells[x, y] = true;
             }
 
+            info.Building.Init(this, g0, p2, isFlipped);
             Buildings.Add(info.Building);
+            
             return true;
         }
     }