todo/src/main/java/ru/kamask/pet/todo/TodoApp.java

@@ -2,29 +2,25 @@ package ru.kamask.pet.todo;
 
 import ru.kamask.pet.todo.model.SimpleTask;
 import ru.kamask.pet.todo.repo.InMemoryTaskRepository;
+import ru.kamask.pet.todo.service.TaskService;
 
 public class TodoApp {
 
     public static void main(String[] args) {
-        var repo = new InMemoryTaskRepository();
+        var service = new TaskService(new InMemoryTaskRepository());
 
-        repo.save(new SimpleTask("Задача номер один"));
-        repo.save(new SimpleTask("Задача номер два"));
-        repo.save(new SimpleTask("Задача номер три"));
-        repo.save(new SimpleTask("Задача номер четыре"));
+        service.create("Задача номер один");
+        service.create("Задача номер два");
+        service.create("Задача номер три");
+        service.create("Задача номер четыре");
 
-        System.out.println(repo.findAll());
+        System.out.println(service.list());
 
-        var taskOption = repo.findById(2);
-        if (taskOption.isPresent()) {
-            SimpleTask task = (SimpleTask) taskOption.get();
-            task.markAsCompleted();
-            var data = task.data();
-            System.out.println(data);
-        }
+        service.complete(2);
+        service.getById(2).ifPresent(task -> System.out.println(((SimpleTask) task).data()));
 
-        repo.delete(1);
-        System.out.println(repo.findAll());
+        service.remove(3);
+        System.out.println(service.list());
     }
 
 }

todo/src/main/java/ru/kamask/pet/todo/service/TaskService.java

@@ -0,0 +1,41 @@
+package ru.kamask.pet.todo.service;
+
+import java.util.List;
+import java.util.Optional;
+
+import ru.kamask.pet.todo.model.Task;
+import ru.kamask.pet.todo.model.SimpleTask;
+import ru.kamask.pet.todo.repo.TaskRepository;
+
+public class TaskService {
+    private final TaskRepository repo;
+
+    public TaskService(TaskRepository repo) {
+        this.repo = repo;
+    }
+
+    public void create(String title) {
+        repo.save(new SimpleTask(title));
+    }
+
+    public Optional<Task> getById(int id) {
+        return repo.findById(id);
+    }
+
+    public boolean complete(int id) {
+        var taskOpt = repo.findById(id);
+        if (taskOpt.isPresent()) {
+            taskOpt.get().markAsCompleted();
+            return true;
+        }
+        return false;
+    }
+
+    public List<Task> list() {
+        return repo.findAll();
+    }
+
+    public void remove(int id) {
+        repo.delete(id);
+    }
+}