Add remove-completed command, to remove completed items from a give…

src/Todo.CLI/Commands/RemoveCompletedCommand.cs

@@ -0,0 +1,23 @@
+using System;
+using System.CommandLine;
+using Todo.CLI.Handlers;
+
+namespace Todo.CLI.Commands;
+
+public class RemoveCompletedCommand : Command
+{
+    private static readonly Argument<string> ListNameArgument = new("list-name", "The name of the list from where to remove completed items.")
+    {
+        Arity = ArgumentArity.ExactlyOne
+    };
+
+
+    public RemoveCompletedCommand(IServiceProvider serviceProvider) : base("remove-completed")
+    {
+        Description = "Removes completed items from a list.";
+
+        Add(ListNameArgument);
+
+        this.SetHandler(RemoveCompletedCommandHandler.Create(serviceProvider), ListNameArgument);
+    }
+}

src/Todo.CLI/Commands/TodoCommand.cs

@@ -23,5 +23,6 @@ public TodoCommand(IServiceProvider serviceProvider)
         Add(new ListCommand(serviceProvider));
         Add(new CompleteCommand(serviceProvider));
         Add(new RemoveCommand(serviceProvider));
+        Add(new RemoveCompletedCommand(serviceProvider));
     }
 }

src/Todo.CLI/Handlers/RemoveCompletedCommandHandler.cs

@@ -0,0 +1,57 @@
+using System.Collections.Generic;
+
+namespace Todo.CLI.Handlers;
+
+using System;
+using System.Linq;
+using System.Threading.Tasks;
+using Core.Model;
+using Core.Repository;
+using Microsoft.Extensions.DependencyInjection;
+
+public class RemoveCompletedCommandHandler
+{
+    public static Func<string, Task> Create(IServiceProvider serviceProvider)
+    {
+        return (listName) => Execute(serviceProvider, listName);
+    }
+
+    private static async Task Execute(IServiceProvider sp, string listName)
+    {
+        if (!string.IsNullOrWhiteSpace(listName))
+        {
+            var listRepo = sp.GetRequiredService<ITodoListRepository>();
+            var list = await listRepo.GetByNameAsync(listName);
+            if (list?.Id is null)
+                Console.WriteLine($"No list found with the name '{listName}'.");
+            else
+            {
+                var itemRepo = sp.GetRequiredService<ITodoItemRepository>();
+
+
+                list.Tasks = (await itemRepo.ListByListIdAsync(list.Id, true)).ToList();
+                while(list.Tasks.Any(t => t.IsCompleted)){
+                  DeleteItems(itemRepo, list.Tasks.Where(t => t.IsCompleted));
+                  list.Tasks = (await itemRepo.ListByListIdAsync(list.Id, true)).ToList();
+                }
+            }
+
+            return;
+        }
+
+        Console.WriteLine("No list name provided.");
+    }
+
+
+    private static void DeleteItems(ITodoItemRepository todoItemRepository, IEnumerable<TodoItem> selectedItems)
+    {
+
+        foreach (var item in selectedItems)
+        {
+            Console.WriteLine($"Attempt to delete `{item.Subject}`");
+            todoItemRepository.DeleteAsync(item).GetAwaiter().GetResult();
+        }
+
+        Console.Clear();
+    }
+}