feat: file metadata

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}";
+        }
+
+
+    }
+}