riversong code showcase

Source/Riversong/Game/EditTools/RoadTool.cs

@@ -0,0 +1,50 @@
+using Cysharp.Threading.Tasks;
+using Unity.Mathematics;
+
+namespace DanieleMarotta.RiversongCodeShowcase
+{
+    public class RoadTool : DragTool
+    {
+        private IEditToolValidatorService _validator;
+
+        private IRoadFactory _roadFactory;
+
+        public RoadTool(IServiceLocator serviceLocator) : base(serviceLocator)
+        {
+        }
+
+        protected override DeletedGameObjectsFilter DeletedGameObjectsFilter => DeletedGameObjectsFilter.RawResources;
+
+        public override async UniTask InitializeAsync()
+        {
+            await base.InitializeAsync();
+
+            _validator = ServiceLocator.GetService<IEditToolValidatorService>();
+            _roadFactory = ServiceLocator.GetService<IRoadFactory>();
+        }
+
+        protected override bool Validate(ref int2 startTile, ref int2 endTile)
+        {
+            var dx = endTile.x - startTile.x;
+            var dy = endTile.y - startTile.y;
+
+            if (math.abs(dx) >= math.abs(dy))
+                endTile = new int2(endTile.x, startTile.y);
+            else
+                endTile = new int2(startTile.x, endTile.y);
+
+            return _validator.DoCommonValidation(new TileRect(startTile, endTile), BlockReason.CannotBuildRoad) == EditToolValidationResult.Success;
+        }
+
+        protected override void UpdateAffectedTiles(bool isValid, int2 startTile, int2 endTile)
+        {
+            var type = isValid ? TileHighlightType.ValidTile : TileHighlightType.InvalidTile;
+            foreach (var tile in TileRange.From(startTile, endTile)) AffectedTiles.Add((tile, type));
+        }
+
+        protected override void DoTool(int2 startTile, int2 endTile)
+        {
+            _roadFactory.CreateRoad(startTile, endTile);
+        }
+    }
+}