Добавлено сохранение в файл и загрузка из файла в MapsCollection

SelfPropelledArtilleryUnit/MapsCollection.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics.Tracing;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
@@ -14,6 +15,9 @@ namespace Artilleries
         private readonly int _pictureWidth;
         private readonly int _pictureHeight;
 
+        private readonly char separatorDict = '|';
+        private readonly char separatorData = ';';
+
         public MapsCollection(int pictureWidth, int pictureHeight)
         {
             _mapsStorage = new Dictionary<string, MapWithSetArtilleriesGeneric<DrawingObjectArtillery, AbstractMap>>();
@@ -44,5 +48,66 @@ namespace Artilleries
                 return _mapsStorage.ContainsKey(index) ? _mapsStorage[index] : null;
             }
         }
+
+        public bool SaveData(string filename)
+        {
+            if (File.Exists(filename))
+            {
+                File.Delete(filename);
+            }
+
+            using (FileStream fs = new FileStream(filename, FileMode.Create))
+            using (StreamWriter sw = new StreamWriter(fs, Encoding.UTF8))
+            {
+                sw.WriteLine("MapsCollection");
+                foreach (var storage in _mapsStorage)
+                {
+                    sw.WriteLine($"{storage.Key}{separatorDict}{storage.Value.GetData(separatorDict, separatorData)}");
+                }
+            }
+
+            return true;
+        }
+
+        public bool LoadData(string filename)
+        {
+            if (!File.Exists(filename))
+            {
+                return false;
+            }
+
+            using (FileStream fs = new FileStream(filename, FileMode.Open))
+            using (StreamReader sr = new StreamReader(fs, Encoding.UTF8))
+            {
+                string current_line = sr.ReadLine();
+
+                if (current_line == null || !current_line.Contains("MapsCollection"))
+                {
+                    return false;
+                }
+
+                _mapsStorage.Clear();
+                while ((current_line = sr.ReadLine()) != null)
+                {
+                    var elements = current_line.Split(separatorDict);
+                    AbstractMap map = null;
+
+                    switch (elements[1])
+                    {
+                        case "SimpleMap":
+                            map = new SimpleMap();
+                            break;
+                        case "ForestMap":
+                            map = new ForestMap();
+                            break;
+                    }
+
+                    _mapsStorage.Add(elements[0], new MapWithSetArtilleriesGeneric<DrawingObjectArtillery, AbstractMap>(_pictureWidth, _pictureHeight, map));
+                    _mapsStorage[elements[0]].LoadData(elements[2].Split(separatorData, StringSplitOptions.RemoveEmptyEntries));
+                }
+
+                return true;
+            }
+        }
     }
 }