Add TodoItem model and repository.

ServerManagement/Models/ToDoItem.cs

@@ -0,0 +1,10 @@
+namespace ServerManagement.Models
+{
+  public class ToDoItem
+  {
+    public int Id { get; set; }
+    public string Name { get; set; } = "";
+    public bool IsCompleted { get; set; }
+    public DateTime DateCompleted { get; set; }
+  }
+}

ServerManagement/Models/ToDoItemsRepository.cs

@@ -0,0 +1,66 @@
+namespace ServerManagement.Models
+{
+  public static class ToDoItemsRepository
+  {
+    private static List<ToDoItem> items = new List<ToDoItem>()
+    {
+      new ToDoItem { Id = 1, Name = "Update firmware of Brocade ICX 6430." },
+      new ToDoItem { Id = 2, Name = "Fix bug with missing icons on Windows server." },
+      new ToDoItem { Id = 3, Name = "Install Docker hub on Server D." },
+      new ToDoItem { Id = 4, Name = "Upgrade VM RAM." },
+      new ToDoItem { Id = 5, Name = "Investigate disk size of Debian server." },
+    };
+
+    public static void AddItem(ToDoItem item)
+    {
+      var maxId = items.Max(s => s.Id);
+      item.Id = (items.Count > 0) ? maxId + 1 : 1;
+      items.Add(item);      
+    }
+
+    public static List<ToDoItem> GetItems()
+    {
+      var sortedItems = items
+        .OrderBy(item => item.IsCompleted)
+        .ThenByDescending(item => item.Id)
+        .ToList();
+      return sortedItems;
+    }
+
+    public static ToDoItem? GetItemById(int id)
+    {
+      var item = items.FirstOrDefault(item => item.Id == id);
+      if (item != null)
+      {
+        return new ToDoItem { Id = item.Id, Name = item.Name };
+      }
+      return null;
+    }
+
+    public static void UpdateItem(int itemId, ToDoItem item)
+    {
+      if (itemId != item.Id) return;
+
+      var itemToUpdate = items.FirstOrDefault(item => item.Id == itemId);
+      if (itemToUpdate != null)
+      {
+        itemToUpdate.Name = item.Name;
+      }
+    }
+
+    public static void DeleteItem(int itemId)
+    {
+      var itemToDelete = items.FirstOrDefault(item => item.Id == itemId);
+      if (itemToDelete != null)
+      {
+        items.Remove(itemToDelete);
+      }
+    }
+
+    public static List<ToDoItem> SearchItems(string itemFilter)
+    {
+      return items.Where(item => item.Name.Contains(itemFilter, StringComparison.OrdinalIgnoreCase))
+                  .ToList();
+    }
+  }
+}