Add duplicate path check

Commands/AddCommand.cs

@@ -1,3 +1,4 @@
+using System.Diagnostics.Contracts;
 using TBDel.Models;
 using TBDel.Services;
 
@@ -7,9 +8,6 @@ namespace TBDel.Commands
     {
         public static async Task AddEntry(string[] args)
         {
-            // TODO: Add duplicate path check
-            // TODO: Add support for multiple paths
-
             if (args.Length > 1)
             {
                 string workingDirectory = Directory.GetCurrentDirectory();
@@ -19,6 +17,12 @@ namespace TBDel.Commands
                 if (File.Exists(absolutePath))
                 {
                     Console.WriteLine($"Adding: {absolutePath}");
+                    if (await dbService.EtryExists(absolutePath))
+                    {
+                        Console.ForegroundColor = ConsoleColor.Yellow;
+                        Console.WriteLine("File already exists in the list - No actions performed.");
+                        return;
+                    }
                     var entry = new FileEntry { Id = GenerateUniqueId(dbService), Path = absolutePath, DateAdded = DateTime.Now };
                     if (await dbService.AddFileEntryAsync(entry))
                     {
@@ -38,6 +42,12 @@ namespace TBDel.Commands
                 else if (Directory.Exists(absolutePath))
                 {
                     Console.WriteLine($"Adding: {absolutePath}");
+                    if (await dbService.EtryExists(absolutePath))
+                    {
+                        Console.ForegroundColor = ConsoleColor.Yellow;
+                        Console.WriteLine("Folder already exists in the list - No actions performed.");
+                        return;
+                    }
                     var entry = new FolderEntry() { Id = GenerateUniqueId(dbService), Path = absolutePath, DateAdded = DateTime.Now };
                     if (await dbService.AddFolderEntryAsync(entry))
                     {

Program.cs

@@ -4,7 +4,6 @@ namespace TBDel
 {
     internal class Program
     {
-        // TODO: Add a command to show the Db path
         // TODO: Add a command to remove a file or folder only from the list
         static async Task Main(string[] args)
         {

Services/DbService.cs

@@ -106,6 +106,16 @@ namespace TBDel.Services
             return String.Empty;
         }
 
+        public async Task<bool> EtryExists(String path)
+        {
+            if (_fileCollection.Find(f => f.Path == path) is not null || _folderCollection.Find(f => f.Path == path) is not null)
+            {
+                return await Task.FromResult(true);
+            }
+            return await Task.FromResult(false);
+        }
+
+
     }
 
     public class DatabaseContent