riversong code showcase

Source/Riversong/Game/Unlocks/UnlocksState.cs

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+using System.Collections.Generic;
+
+namespace DanieleMarotta.RiversongCodeShowcase
+{
+    public class UnlocksState
+    {
+        private Dictionary<int, int> _buildingUnlockLookup = new();
+
+        public HashSet<int> Unlocked { get; } = new();
+
+        public HashSet<int> UnlockedBuildings { get; } = new();
+
+        public HashSet<int> TeasedBuildings { get; } = new();
+
+        public void AddBuildingUnlock(BuildingDefinition building, int unlockId)
+        {
+            _buildingUnlockLookup.Add(building.RuntimeId, unlockId);
+        }
+
+        public bool TryGetBuildingUnlock(BuildingDefinition building, out int unlockId)
+        {
+            return _buildingUnlockLookup.TryGetValue(building.RuntimeId, out unlockId);
+        }
+    }
+}