Этап 2. Класс MapsCollection

DoubleDeckerBus/DoubleDeckerBus/MapsCollection.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DoubleDeckerBus
+{
+    internal class MapsCollection
+    {
+        readonly Dictionary<string, MapWithSetBusesGeneric<DrawningObjectBus, AbstractMap>> _mapStorages;
+
+        public List<string> Keys => _mapStorages.Keys.ToList();
+
+        private readonly int _pictureWidth;
+
+        private readonly int _pictureHeight;
+
+        public MapsCollection(int pictureWidth, int pictureHeight)
+        {
+            _mapStorages = new Dictionary<string, MapWithSetBusesGeneric<DrawningObjectBus, AbstractMap>>();
+            _pictureWidth = pictureWidth;
+            _pictureHeight = pictureHeight;
+        }
+
+        public void AddMap(string name, AbstractMap map)
+        {
+            if (Keys.Contains(name)) return;
+            _mapStorages.Add(name, new MapWithSetBusesGeneric<DrawningObjectBus, AbstractMap>(_pictureWidth, _pictureHeight, map));
+        }
+
+        public void DelMap(string name)
+        {
+            _mapStorages.Remove(name);
+        }
+
+        public MapWithSetBusesGeneric<DrawningObjectBus, AbstractMap> this[string ind]
+        {
+            get
+            {
+                _mapStorages.TryGetValue(ind, out var result);
+                return result;
+            }
+        }
+    }
+}