feat: file metadata

CarManagerV3/Manager/SafeManager.cs

@@ -3,6 +3,8 @@ using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using System.Windows.Forms;
+using CarManagerV3.Classes;
+using CarManagerV3.Manager;
 
 
 namespace CarManagerV3
@@ -56,7 +58,7 @@ namespace CarManagerV3
                 {
                     Directory.CreateDirectory(directory);
                 }
-                if(!folderOnly) InitializeFile(path);
+                if (!folderOnly) InitializeFile(path);
             }
             catch (Exception ex)
             {
@@ -95,6 +97,7 @@ namespace CarManagerV3
         {
             List<Car> cars = new List<Car>();
             List<string> failedLines = new List<string>();
+            FileMeta meta = null;
             bool isLegacy = false;
             try
             {
@@ -103,6 +106,27 @@ namespace CarManagerV3
                     string line;
                     while ((line = reader.ReadLine()) != null)
                     {
+                        if (FileMeta.IsFileMeta(line))
+                        {
+                            meta = FileMeta.FromCSV(line);
+                            if (meta != null)
+                            {
+                                if (FileMeta.NeedsUpdate(meta))
+                                {
+                                    if (!StateManager.askForMigration(meta))
+                                    {
+                                        MessageBox.Show($"The file you are trying to open is from an older version that is no longer supported. Please select a different file.\nRunning:{Updater.GetCurrentVersion()}, File:{meta.Version}", "Unsupported Version", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                                        throw new LegacyException();
+                                        //Environment.Exit(0);
+                                    }
+                                    else
+                                    {
+                                        isLegacy = true;
+                                    }
+                                }
+                            }
+                            continue;
+                        }
                         // Process the line
                         if (line == "") continue;
                         if (Car.isLegacyCsvString(line))
@@ -116,8 +140,10 @@ namespace CarManagerV3
                             else
                             {
                                 isLegacy = true;
+                                line = FileUpdate.PerformOldLegacyUpdate(line);
                             }
                         }
+                        if (isLegacy && meta != null) line = FileUpdate.ApplyUpdates(line, meta.Version);
                         Car tmp = Car.FromCsvString(line);
                         if (tmp == null)
                         {
@@ -166,6 +192,8 @@ namespace CarManagerV3
             {
                 using (StreamWriter writer = new StreamWriter(@path))
                 {
+                    FileMeta meta = FileMeta.Generate();
+                    writer.WriteLine(meta.ToCSV());
                     foreach (Car car in cars)
                     {
                         writer.WriteLine(car.ToCsvString());
@@ -285,5 +313,31 @@ namespace CarManagerV3
             }
         }
 
+
+        public static FileMeta GetFileMeta(string path)
+        {
+            try
+            {
+                using (StreamReader reader = new StreamReader(@path))
+                {
+                    string line;
+                    while ((line = reader.ReadLine()) != null)
+                    {
+                        if (FileMeta.IsFileMeta(line))
+                        {
+                            reader.Close();
+                            return FileMeta.FromCSV(line);
+                        }
+                    }
+                    reader.Close();
+                }
+            }
+            catch (Exception ex)
+            {
+                Console.Error.WriteLine($"Error getting file meta: {ex.Message}");
+            }
+            return null;
+
+        }
     }
 }