First commit for private source control. Older commits available on Github.

Assets/Scripts/Game/Puzzles/ChapterOne/Fountain/FountainGemSlot.cs

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+using BriarQueen.Data.Identifiers;
+using BriarQueen.Framework.Managers.Levels.Data;
+using BriarQueen.Framework.Managers.Player.Data;
+using Cysharp.Threading.Tasks;
+
+namespace BriarQueen.Game.Puzzles.ChapterOne.Fountain
+{
+    public class FountainGemSlot : BaseItem
+    {
+        private FountainGemBasePuzzle _puzzle;
+
+        private readonly string _firstPieceKey = ItemIDs.Get(ItemKey.Sapphire);
+        private readonly string _secondPieceKey = ItemIDs.Get(ItemKey.Emerald);
+        private readonly string _thirdPieceKey = ItemIDs.Get(ItemKey.Ruby);
+
+        public override string InteractableName => "Hole";
+
+        public void Initialize(FountainGemBasePuzzle puzzle)
+        {
+            _puzzle = puzzle;
+        }
+
+        public override UniTask OnInteract(ItemDataSo item = null)
+        {
+            if (_puzzle == null || item == null || _puzzle.IsCompleted)
+            {
+                return UniTask.CompletedTask;
+            }
+            
+            if (!CheckEmptyHands())
+                return  UniTask.CompletedTask;
+
+            var itemID = item.UniqueID;
+            if (!IsValidGem(itemID))
+            {
+                return UniTask.CompletedTask;
+            }
+
+            _puzzle.TryInsertGem(item);
+            return UniTask.CompletedTask;
+        }
+
+        private bool IsValidGem(string itemID)
+        {
+            return itemID == _firstPieceKey ||
+                   itemID == _secondPieceKey ||
+                   itemID == _thirdPieceKey;
+        }
+    }
+}