From dd9105c2e4dec44fd9b71fb993e2a60513c13ddd Mon Sep 17 00:00:00 2001
From: Pavel_Sorokin <sorokin.zxcv@gmail.com>
Date: Mon, 7 Nov 2022 20:33:06 +0400
Subject: [PATCH] StreamWriter and StreamReader.

---
 Liner/Liner/MapsCollection.cs | 76 +++++++++++++++++++----------------
 1 file changed, 42 insertions(+), 34 deletions(-)

diff --git a/Liner/Liner/MapsCollection.cs b/Liner/Liner/MapsCollection.cs
index 09d4a38..2eed3e7 100644
--- a/Liner/Liner/MapsCollection.cs
+++ b/Liner/Liner/MapsCollection.cs
@@ -1,6 +1,8 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Linq;
+using System.Linq.Expressions;
 using System.Text;
 using System.Threading.Tasks;
 
@@ -53,12 +55,12 @@ namespace Liner
             {
                 File.Delete(filename);
             }
-            using (FileStream fs = new(filename, FileMode.Create))
+            using (StreamWriter sw = new(filename))
             {
-                WriteToFile($"MapsCollection{Environment.NewLine}", fs);
+                sw.Write($"MapsCollection{Environment.NewLine}");
                 foreach (var storage in _mapStorages)
                 {
-                    WriteToFile($"{storage.Key}{separatorDict}{storage.Value.GetData(separatorDict, separatorData)}{Environment.NewLine}", fs);
+                    sw.Write($"{storage.Key}{separatorDict}{storage.Value.GetData(separatorDict, separatorData)}{Environment.NewLine}");
                 }
             }
             return true;
@@ -70,39 +72,45 @@ namespace Liner
                 return false;
             }
             string bufferTextFromFile = "";
-            using (FileStream fs = new(filename, FileMode.Open))
+            using (StreamReader sr = new(filename))
             {
-                byte[] b = new byte[fs.Length];
-                UTF8Encoding temp = new(true);
-                while (fs.Read(b, 0, b.Length) > 0)
+                bool isFirst = true;
+                string str;
+                while ((str = sr.ReadLine()) != null) 
                 {
-                    bufferTextFromFile += temp.GetString(b);
-                }
-            }
-            var strs = bufferTextFromFile.Split(new char[] { '\n', '\r' }, StringSplitOptions.RemoveEmptyEntries);
-            if (!strs[0].Contains("MapsCollection"))
-            {
-                return false;
-            }
-            _mapStorages.Clear();
-            for (int i = 1; i < strs.Length; ++i)
-            {
-                var elem = strs[i].Split(separatorDict);
-                AbstractMap map = null;
-                switch (elem[1])
-                {
-                    case "SimpleMap":
-                        map = new SimpleMap();
-                        break;
-                    case "SeaMap":
-                        map=new SeaMap();
-                        break;
-                    case "SwampMap":
-                        map = new SwampMap();
-                        break;
-                }
-                _mapStorages.Add(elem[0], new MapWithSetShipsGeneric<IDrawingObject,AbstractMap>(_pictureWidth, _pictureHeight, map));
-                _mapStorages[elem[0]].LoadData(elem[2].Split(separatorData, StringSplitOptions.RemoveEmptyEntries));
+                    if (isFirst)
+                    {
+                        if (!str.Contains("MapsCollection"))
+                        {
+                            return false;
+                        }
+                        else
+                        {
+                            _mapStorages.Clear();
+                        }
+                        isFirst = false;
+                    }
+                    else 
+                    {
+                        var tempElem = str.Split(separatorDict);
+                        AbstractMap map = null;
+                        switch (tempElem[1])
+                        {
+                            case "SimpleMap":
+                                map = new SimpleMap();
+                                break;
+                            case "SeaMap":
+                                map = new SeaMap();
+                                break;
+                            case "SwampMap":
+                                map = new SwampMap();
+                                break;
+
+                        }
+                        _mapStorages.Add(tempElem[0], new MapWithSetShipsGeneric<IDrawingObject, AbstractMap>(_pictureWidth, _pictureHeight, map));
+                        _mapStorages[tempElem[0]].LoadData(tempElem[2].Split(separatorData, StringSplitOptions.RemoveEmptyEntries));
+                    }
+                } 
             }
             return true;
         }