Extract service code

TodoMinimal.WebApi/TodoService.cs

@@ -0,0 +1,56 @@
+using System.Text;
+
+public record TodoDTO(int? Order, string? Title, bool? Completed, string Url);
+
+public class TodoService {
+    private string baseUrl;
+    private TodoRepo repo;
+    public TodoService(string baseUrl, TodoRepo repo) {
+        this.baseUrl = baseUrl;
+        this.repo = repo;
+    }
+
+    public IEnumerable<TodoDTO> All() {
+        return repo.All().Select(MapTodo);
+    }
+
+    public TodoDTO Find(Guid id) {
+        return MapTodo(
+            repo.Find(id)
+        );
+    }
+
+    public TodoDTO Add(TodoDTO todo) {
+        return MapTodo(
+            repo.Add(new(
+                Guid.NewGuid(),
+                todo.Order ?? 0,
+                todo.Title ?? "default",
+                todo.Completed ?? false
+            ))
+        );
+    }
+
+    public void Clear() {
+        repo.Clear();
+    }
+
+    public TodoDTO Update(Guid id, TodoDTO todo) {
+        return MapTodo(
+            repo.Update(id, todo.Title, todo.Order, todo.Completed)
+        );
+    }
+
+    public void Delete(Guid id) {
+        repo.Delete(id);
+    }
+
+    private TodoDTO MapTodo(Todo todo) {
+        return new(
+        todo.Order,
+        todo.Title,
+        todo.Completed,
+        $"{baseUrl}/{todo.Id}"
+    );
+    }
+}