feat: file metadata

CarManagerV3/Classes/Car.cs

@@ -178,22 +178,7 @@ namespace CarManagerV3
             try
             {
                 string[] parts = csv.Split(';');
-                // is part 7 a valid int? if not set it to 0 and log a warning.
+                System.Diagnostics.Debug.WriteLine(csv);
-                if (parts.Length == 7)
-                {
-                    Console.Error.WriteLine($"Warning: CSV string has only 7 fields, expected 8. Setting Order to 0. CSV: {csv}");
-                    if (!StateManager.askForMigration())
-                    {
-                        throw new Exception("User declined migration. Cannot parse CSV string with missing Order field.");
-                    }
-                    Array.Resize(ref parts, 8);
-                    parts[7] = "0";
-                }
-                else if (parts.Length != 8)
-                {
-                    throw new FormatException($"CSV string has {parts.Length} fields, expected 8. CSV: {csv}");
-                }
-
                 Car temp = new Car(parts[0], parts[1], parts[2], int.Parse(parts[3]), parts[4], int.Parse(parts[5]), decimal.Parse(parts[6]), int.Parse(parts[7]));
                 return temp;
             }

CarManagerV3/Classes/FileMeta.cs

@@ -0,0 +1,74 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using CarManagerV3.Manager;
+
+namespace CarManagerV3.Classes
+{
+    internal class FileMeta
+    {
+        private string version;
+        private DateTime lastModified;
+
+        public string Version { get { return version; } set { version = value; } }
+        public DateTime LastModified { get { return lastModified; } }
+
+        public FileMeta(string version)
+        {
+            this.version = version;
+            this.lastModified = DateTime.Now;
+        }
+
+        public static FileMeta FromCSV(string csv)
+        {
+            string[] parts = csv.Split(';');
+            if (parts.Length < 3)
+            {
+                throw new FormatException("CSV format is incorrect. Expected format: product;version;lastModified");
+            }
+            return new FileMeta(parts[1]) { lastModified = DateTime.Parse(parts[2]) };
+        }
+
+        public static FileMeta Generate()
+        {
+            string version = Updater.GetCurrentVersion();
+            return new FileMeta(version);
+        }
+
+        public static bool IsFileMeta(string csv)
+        {
+            return csv.StartsWith("CarManager3;");
+        }
+
+        public static bool IsOlderVersion(FileMeta meta)
+        {
+            string version = Updater.GetCurrentVersion();
+            return Updater.IsNewerVersion(version, meta.Version);
+        }
+
+        public static bool NeedsUpdate(FileMeta meta)
+        {
+            string version = Updater.GetCurrentVersion();
+            return Updater.IsNewerVersion(version, meta.Version) && FileUpdate.GetRequiredUpdates(meta.Version).Count > 0;
+        }
+
+        public void Modify()
+        {
+            lastModified = DateTime.Now;
+        }
+
+        public string ToCSV()
+        {
+            return $"CarManager3;{version};{lastModified}";
+        }
+
+        public override string ToString()
+        {
+            return $"File Version: {version}, Last Modified: {lastModified}";
+        }
+
+
+    }
+}

CarManagerV3/Classes/FileUpdate.cs

@@ -0,0 +1,102 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using CarManagerV3.Manager;
+
+namespace CarManagerV3.Classes
+{
+    internal class FileUpdate
+    {
+        public string version;
+        public bool needUpdate;
+        public Func<string, string> updateAction;
+
+        public static List<FileUpdate> GetUpdates()
+        {
+            return new List<FileUpdate>
+            {
+                new FileUpdate {
+                    version = "1.4.3.0",
+                    needUpdate = true,
+                    updateAction = (fileContent) =>
+                    {
+                        // Implement the logic to update the file content for version
+                        List<string> parts = fileContent.Split(";").ToList();
+                        parts[4] = "Black";
+                        return string.Join(";", parts);
+                    }
+                },
+                new FileUpdate {
+                    version = "1.4.4.0",
+                    needUpdate = false
+                }
+                // Add more FileUpdate instances for other versions as needed
+            };
+        }
+
+        public static List<FileUpdate> GetRequiredUpdates(string fromVersion)
+        {
+            string currentVersion = Updater.GetCurrentVersion();
+            // Get all updates whos version is greater than fromVersion
+            return GetUpdates().Where(update => string.Compare(update.version, fromVersion) > 0 && string.Compare(update.version, currentVersion) <= 0 && update.needUpdate && update.updateAction != null).ToList();
+        }
+
+        public static string ApplyUpdates(string fileContent, string fileVersion)
+        {
+            List<FileUpdate> updates = GetRequiredUpdates(fileVersion);
+            foreach (var update in updates)
+            {
+                if (update.needUpdate && update.updateAction != null)
+                {
+                    fileContent = update.updateAction(fileContent);
+                }
+            }
+            return fileContent;
+        }
+
+        public static List<string> ApplyUpdatesToALl(List<string> fileContents, string fileVersion)
+        {
+            List<FileUpdate> updates = GetRequiredUpdates(fileVersion);
+            List<string> updatedContents = new List<string>();
+            foreach (var content in fileContents)
+            {
+                string updatedContent = content;
+                foreach (var update in updates)
+                {
+                    if (update.needUpdate && update.updateAction != null)
+                    {
+                        updatedContent = update.updateAction(updatedContent);
+                    }
+                }
+                updatedContents.Add(updatedContent);
+            }
+            return updatedContents;
+        }
+
+
+        public static string PerformOldLegacyUpdate(string fileContent)
+        {
+            string[] parts = fileContent.Split(';');
+            // is part 7 a valid int? if not set it to 0 and log a warning.
+            if (parts.Length == 7)
+            {
+                Console.Error.WriteLine($"Warning: CSV string has only 7 fields, expected 8. Setting Order to 0. CSV: {fileContent}");
+                if (!StateManager.askForMigration())
+                {
+                    throw new Exception("User declined migration. Cannot parse CSV string with missing Order field.");
+                }
+                Array.Resize(ref parts, 8);
+                parts[7] = "0";
+                return string.Join(";", parts);
+            }
+            else if (parts.Length != 8)
+            {
+                throw new FormatException($"CSV string has {parts.Length} fields, expected 8. CSV: {fileContent}");
+            }
+            return fileContent;
+        }
+
+    }
+}

CarManagerV3/Forms/MainForm.Designer.cs

@@ -30,7 +30,7 @@
         {
             components = new System.ComponentModel.Container();
             System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(MainForm));
-            tableLayoutPanel1 = new System.Windows.Forms.TableLayoutPanel();
+            tlpWrapper = new System.Windows.Forms.TableLayoutPanel();
             flpCars = new System.Windows.Forms.FlowLayoutPanel();
             tlpControls = new System.Windows.Forms.TableLayoutPanel();
             btnNewCar = new System.Windows.Forms.Button();
@@ -53,35 +53,40 @@
             toolsToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             openWelcomeScreenToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             clearRecentFilesToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
-            imageList1 = new System.Windows.Forms.ImageList(components);
             aboutToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             checkForUpdatesToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             gitRepositoryToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
-            tableLayoutPanel1.SuspendLayout();
+            tableLayoutPanel2 = new System.Windows.Forms.TableLayoutPanel();
+            lblFileInfo = new System.Windows.Forms.Label();
+            imageList1 = new System.Windows.Forms.ImageList(components);
+            tlpWrapper.SuspendLayout();
             tlpControls.SuspendLayout();
             tlpSearch.SuspendLayout();
             ((System.ComponentModel.ISupportInitialize)pbxSearch).BeginInit();
             menuStrip1.SuspendLayout();
+            tableLayoutPanel2.SuspendLayout();
             SuspendLayout();
             // 
-            // tableLayoutPanel1
+            // tlpWrapper
             // 
-            tableLayoutPanel1.ColumnCount = 1;
+            tlpWrapper.ColumnCount = 1;
-            tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 100F));
+            tlpWrapper.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 100F));
-            tableLayoutPanel1.Controls.Add(flpCars, 0, 2);
+            tlpWrapper.Controls.Add(flpCars, 0, 2);
-            tableLayoutPanel1.Controls.Add(tlpControls, 0, 1);
+            tlpWrapper.Controls.Add(tlpControls, 0, 1);
-            tableLayoutPanel1.Controls.Add(menuStrip1, 0, 0);
+            tlpWrapper.Controls.Add(menuStrip1, 0, 0);
-            tableLayoutPanel1.Dock = System.Windows.Forms.DockStyle.Fill;
+            tlpWrapper.Controls.Add(tableLayoutPanel2, 0, 3);
-            tableLayoutPanel1.Location = new System.Drawing.Point(0, 0);
+            tlpWrapper.Dock = System.Windows.Forms.DockStyle.Fill;
-            tableLayoutPanel1.Margin = new System.Windows.Forms.Padding(3, 4, 3, 4);
+            tlpWrapper.Location = new System.Drawing.Point(0, 0);
-            tableLayoutPanel1.Name = "tableLayoutPanel1";
+            tlpWrapper.Margin = new System.Windows.Forms.Padding(3, 4, 3, 4);
-            tableLayoutPanel1.RowCount = 3;
+            tlpWrapper.Name = "tlpWrapper";
-            tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle());
+            tlpWrapper.RowCount = 4;
-            tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 50F));
+            tlpWrapper.RowStyles.Add(new System.Windows.Forms.RowStyle());
-            tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle());
+            tlpWrapper.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 50F));
-            tableLayoutPanel1.Size = new System.Drawing.Size(902, 653);
+            tlpWrapper.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 100F));
-            tableLayoutPanel1.TabIndex = 0;
+            tlpWrapper.RowStyles.Add(new System.Windows.Forms.RowStyle());
-            tableLayoutPanel1.Paint += tableLayoutPanel1_Paint;
+            tlpWrapper.Size = new System.Drawing.Size(902, 653);
+            tlpWrapper.TabIndex = 0;
+            tlpWrapper.Paint += tableLayoutPanel1_Paint;
             // 
             // flpCars
             // 
@@ -91,7 +96,7 @@
             flpCars.Location = new System.Drawing.Point(3, 82);
             flpCars.Margin = new System.Windows.Forms.Padding(3, 4, 3, 4);
             flpCars.Name = "flpCars";
-            flpCars.Size = new System.Drawing.Size(896, 567);
+            flpCars.Size = new System.Drawing.Size(896, 541);
             flpCars.TabIndex = 1;
             // 
             // tlpControls
@@ -292,14 +297,6 @@
             clearRecentFilesToolStripMenuItem.Text = "Clear recent files";
             clearRecentFilesToolStripMenuItem.Click += clearRecentFilesToolStripMenuItem_Click;
             // 
-            // imageList1
-            // 
-            imageList1.ColorDepth = System.Windows.Forms.ColorDepth.Depth32Bit;
-            imageList1.ImageStream = (System.Windows.Forms.ImageListStreamer)resources.GetObject("imageList1.ImageStream");
-            imageList1.TransparentColor = System.Drawing.Color.Transparent;
-            imageList1.Images.SetKeyName(0, "Icon_Search.png");
-            imageList1.Images.SetKeyName(1, "Icon_Add.png");
-            // 
             // aboutToolStripMenuItem
             // 
             aboutToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] { checkForUpdatesToolStripMenuItem, gitRepositoryToolStripMenuItem });
@@ -310,23 +307,57 @@
             // checkForUpdatesToolStripMenuItem
             // 
             checkForUpdatesToolStripMenuItem.Name = "checkForUpdatesToolStripMenuItem";
-            checkForUpdatesToolStripMenuItem.Size = new System.Drawing.Size(224, 26);
+            checkForUpdatesToolStripMenuItem.Size = new System.Drawing.Size(213, 26);
             checkForUpdatesToolStripMenuItem.Text = "Check for Updates";
             checkForUpdatesToolStripMenuItem.Click += checkForUpdatesToolStripMenuItem_Click;
             // 
             // gitRepositoryToolStripMenuItem
             // 
             gitRepositoryToolStripMenuItem.Name = "gitRepositoryToolStripMenuItem";
-            gitRepositoryToolStripMenuItem.Size = new System.Drawing.Size(224, 26);
+            gitRepositoryToolStripMenuItem.Size = new System.Drawing.Size(213, 26);
             gitRepositoryToolStripMenuItem.Text = "Git Repository";
             gitRepositoryToolStripMenuItem.Click += gitRepositoryToolStripMenuItem_Click;
             // 
+            // tableLayoutPanel2
+            // 
+            tableLayoutPanel2.AutoSize = true;
+            tableLayoutPanel2.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
+            tableLayoutPanel2.ColumnCount = 2;
+            tableLayoutPanel2.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle());
+            tableLayoutPanel2.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Absolute, 20F));
+            tableLayoutPanel2.Controls.Add(lblFileInfo, 0, 0);
+            tableLayoutPanel2.Dock = System.Windows.Forms.DockStyle.Bottom;
+            tableLayoutPanel2.Location = new System.Drawing.Point(3, 630);
+            tableLayoutPanel2.Name = "tableLayoutPanel2";
+            tableLayoutPanel2.RowCount = 1;
+            tableLayoutPanel2.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 100F));
+            tableLayoutPanel2.Size = new System.Drawing.Size(896, 20);
+            tableLayoutPanel2.TabIndex = 4;
+            // 
+            // lblFileInfo
+            // 
+            lblFileInfo.AutoSize = true;
+            lblFileInfo.ForeColor = System.Drawing.SystemColors.ActiveBorder;
+            lblFileInfo.Location = new System.Drawing.Point(3, 0);
+            lblFileInfo.Name = "lblFileInfo";
+            lblFileInfo.Size = new System.Drawing.Size(150, 20);
+            lblFileInfo.TabIndex = 0;
+            lblFileInfo.Text = "No File info available";
+            // 
+            // imageList1
+            // 
+            imageList1.ColorDepth = System.Windows.Forms.ColorDepth.Depth32Bit;
+            imageList1.ImageStream = (System.Windows.Forms.ImageListStreamer)resources.GetObject("imageList1.ImageStream");
+            imageList1.TransparentColor = System.Drawing.Color.Transparent;
+            imageList1.Images.SetKeyName(0, "Icon_Search.png");
+            imageList1.Images.SetKeyName(1, "Icon_Add.png");
+            // 
             // MainForm
             // 
             AutoScaleDimensions = new System.Drawing.SizeF(8F, 20F);
             AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
             ClientSize = new System.Drawing.Size(902, 653);
-            Controls.Add(tableLayoutPanel1);
+            Controls.Add(tlpWrapper);
             Icon = (System.Drawing.Icon)resources.GetObject("$this.Icon");
             MainMenuStrip = menuStrip1;
             Margin = new System.Windows.Forms.Padding(3, 4, 3, 4);
@@ -334,21 +365,23 @@
             Name = "MainForm";
             StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
             Text = "Carmanager 3";
-            tableLayoutPanel1.ResumeLayout(false);
+            tlpWrapper.ResumeLayout(false);
-            tableLayoutPanel1.PerformLayout();
+            tlpWrapper.PerformLayout();
             tlpControls.ResumeLayout(false);
             tlpSearch.ResumeLayout(false);
             tlpSearch.PerformLayout();
             ((System.ComponentModel.ISupportInitialize)pbxSearch).EndInit();
             menuStrip1.ResumeLayout(false);
             menuStrip1.PerformLayout();
+            tableLayoutPanel2.ResumeLayout(false);
+            tableLayoutPanel2.PerformLayout();
             ResumeLayout(false);
 
         }
 
         #endregion
 
-        private System.Windows.Forms.TableLayoutPanel tableLayoutPanel1;
+        private System.Windows.Forms.TableLayoutPanel tlpWrapper;
         private System.Windows.Forms.FlowLayoutPanel flpCars;
         private System.Windows.Forms.TableLayoutPanel tlpControls;
         private System.Windows.Forms.TextBox tbxSearch;
@@ -375,5 +408,7 @@
         private System.Windows.Forms.ToolStripMenuItem aboutToolStripMenuItem;
         private System.Windows.Forms.ToolStripMenuItem checkForUpdatesToolStripMenuItem;
         private System.Windows.Forms.ToolStripMenuItem gitRepositoryToolStripMenuItem;
+        private System.Windows.Forms.TableLayoutPanel tableLayoutPanel2;
+        private System.Windows.Forms.Label lblFileInfo;
     }
 }

CarManagerV3/Forms/MainForm.cs

@@ -4,6 +4,7 @@ using System.Data;
 using System.Linq;
 using System.Threading.Tasks;
 using System.Windows.Forms;
+using CarManagerV3.Classes;
 using CarManagerV3.Forms;
 using CarManagerV3.Manager;
 using CarManagerV3.Util;
@@ -265,6 +266,16 @@ namespace CarManagerV3
             flpCars.Refresh();
             flpCars.Invalidate();
             flpCars.Update();
+            refreshMeta();
+
+
+        }
+
+        private void refreshMeta()
+        {
+            FileMeta meta = SafeManager.GetFileMeta(filepath);
+            string version = Updater.GetCurrentVersion(true);
+            lblFileInfo.Text = $"Car Manager 3 v.{version}, " + meta.ToString();
         }
 
 
@@ -377,6 +388,7 @@ namespace CarManagerV3
             refreshCars(cars);
             SafeManager.SaveCars(filepath, cars);
             MessageBox.Show("File saved successfully.", "Save File", MessageBoxButtons.OK, MessageBoxIcon.Information);
+            refreshMeta();
         }
 
         private void saveAsToolStripMenuItem_Click(object sender, EventArgs e)

CarManagerV3/Forms/MainForm.resx

@@ -117,9 +117,6 @@
   <resheader name="writer">
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
-  <metadata name="menuStrip1.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
-    <value>17, 17</value>
-  </metadata>
   <assembly alias="System.Drawing" name="System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
   <data name="btnNewCar.Image" type="System.Drawing.Bitmap, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
     <value>
@@ -142,6 +139,9 @@
         VXs21p8MAVc2KdQAvwAAAABJRU5ErkJggg==
 </value>
   </data>
+  <metadata name="menuStrip1.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
+    <value>17, 17</value>
+  </metadata>
   <metadata name="imageList1.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
     <value>153, 17</value>
   </metadata>
@@ -150,15 +150,15 @@
         AAEAAAD/////AQAAAAAAAAAMAgAAAEZTeXN0ZW0uV2luZG93cy5Gb3JtcywgQ3VsdHVyZT1uZXV0cmFs
         LCBQdWJsaWNLZXlUb2tlbj1iNzdhNWM1NjE5MzRlMDg5BQEAAAAmU3lzdGVtLldpbmRvd3MuRm9ybXMu
         SW1hZ2VMaXN0U3RyZWFtZXIBAAAABERhdGEHAgIAAAAJAwAAAA8DAAAAYAQAAAJNU0Z0AUkBTAIBAQIB
-        AAGYAQABmAEAARQBAAEUAQAE/wEhAQAI/wFCAU0BNgcAATYDAAEoAwABUAMAARQDAAEBAQABIAYAARn/
+        AAGwAQABsAEAARQBAAEUAQAE/wEhAQAI/wFCAU0BNgcAATYDAAEoAwABUAMAARQDAAEBAQABIAYAARn/
         AP8AzAADCAEKAyMBMgMuAUYDFgEe/wAtAAMIAQoDIwEyAk8BTgGXAlYBVAGrAy4BRv8ALQADIwEyAk8B
         TgGXAf8BmQEzAf8DTgGWAyMBMiwAA10BzAT/9AADKAE8Ak8BTgGXAl8BWwHTA04BlgMjATIDCAEKLAAD
         XQHMBP/UAAMDAQQDDwETA0QBewJPAU4BlwNNAZIDQAFuAwYBBwMpAT0DTgGYAlsBWQHAAk8BTgGXAyMB
         MgMIAQowAANdAcwE/9AAAxMBGgMxAU0DRAF5AlwBWQHBAmEBXQHPAl0BWwHKAlcBVQG0Az8BbQNSAaMC
         WwFZAcADTgGYAygBPDgAA10BzAT/zAADAwEEAzEBTQJZAVcBvAJgAV0BzgNLAYwDQAFvA0ABbwNLAYwC
-        YAFdAc4BfAFtAVMB9AJTAVEBogMpAT08AANdAcwE/8wAAw8BEwNEAXkCYAFdAc4DBgEIBAIIAAQCAwYB
+        YAFdAc4BeAFoAVMB9AJTAVEBogMpAT08AANdAcwE/8wAAw8BEwNEAXkCYAFdAc4DBgEIBAIIAAQCAwYB
         CAJgAV0BzgM+AWsDBAEFKAADXQHMLP+4AANEAXkDWgG/A0sBjAQCEAAEAgNLAYwCWgFYAbcDQQFxKAAD
-        UgGjA10BzANdAcwDXQHMA10BzAOFAfUE/wNdAcwDXQHMA10BzANdAcwDXQHMuAACTwFOAZcCYAFdAc4D
+        UgGjA10BzANdAcwDXQHMA10BzAN/AfUE/wNdAcwDXQHMA10BzANdAcwDXQHMuAACTwFOAZcCYAFdAc4D
         QAFvGAADQAFvAl8BXAHLA04BlDwAA10BzAT/zAACTwFOAZcCYAFdAc4DQAFvGAADQAFvAl4BWwHNA04B
         ljwAA10BzAT/zAADRAF6AlsBWQHAA0sBjAQCEAAEAgNLAYwCWgFYAb0CRAFDAXc8AANdAcwE/8wAAw4B
         EgNEAXgCYAFdAc4DBgEIBAIIAAQCAwYBCAJgAV0BzgJDAUIBdQMMAQ88AANdAcwE/8wAAwMBBAMxAU0C

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
@@ -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;
+
+        }
     }
 }

CarManagerV3/Manager/StateManager.cs

@@ -2,6 +2,8 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Windows.Forms;
+using CarManagerV3.Classes;
+using CarManagerV3.Manager;
 
 namespace CarManagerV3
 {
@@ -139,13 +141,19 @@ namespace CarManagerV3
         /// This is to prevent multiple annoying popups if the user tries to open multiple files that require migration.
         /// </summary>
         /// <returns>True if the user has accepted to migrate the file, otherwise False</returns>
-        public static bool askForMigration()
+        public static bool askForMigration(FileMeta meta = null)
         {
             if (hasConfirmedMigration)
             {
                 return true;
             }
-            DialogResult result = MessageBox.Show("The file you are trying to open is in an older format. Do you want to attempt to migrate it to the new format? If you choose not to migrate, the file will not be opened.", "Migration Needed", MessageBoxButtons.YesNo, MessageBoxIcon.Warning);
+            string promptMessage = "The file you are trying to open is in an older format. Do you want to attempt to migrate it to the new format? If you choose not to migrate, the file will not be opened.";
+            if(meta != null)
+            {
+                int nUpdatesNeeded = FileUpdate.GetRequiredUpdates(meta.Version).Count;
+                promptMessage = $"The file you are trying to open is in an older format ({meta.Version}). It requires {nUpdatesNeeded} update(s) to be migrated to your Version ({Updater.GetCurrentVersion(true)}).\nDo you want to attempt to migrate it? If you choose not to migrate, the file will not be opened.";
+            }
+            DialogResult result = MessageBox.Show(promptMessage, "Migration Needed", MessageBoxButtons.YesNo, MessageBoxIcon.Warning);
             hasConfirmedMigration = result == DialogResult.Yes;
             return hasConfirmedMigration;
         }