todo/src/main/java/ru/kamask/pet/todo/cli/ListCommand.java

@@ -4,7 +4,6 @@ import java.util.List;
 import java.util.Optional;
 
 import ru.kamask.pet.todo.model.SimpleTask;
-import ru.kamask.pet.todo.model.Task;
 import ru.kamask.pet.todo.service.TaskService;
 
 public class ListCommand implements Command {
@@ -28,7 +27,7 @@ public class ListCommand implements Command {
         return String.format(templateUsage, name(), "Список всех задач.");
     }
 
-    String formatWithTable(List<Task> tasks, String msgIfEmpty) {
+    String formatWithTable(List<SimpleTask> tasks, String msgIfEmpty) {
         String template = "%-2s | %-30s | %s\n";
         var res = new StringBuilder(String.format(template, "ID", "Название задачи", "Статус"));
         res.append("-".repeat(50) + "\n");
@@ -36,8 +35,8 @@ public class ListCommand implements Command {
         if (tasks.size() == 0)
             return res.append("\n" + msgIfEmpty).toString();
 
-        for (Task task : tasks) {
-            SimpleTask.Data data = ((SimpleTask) task).data();
+        for (SimpleTask task : tasks) {
+            SimpleTask.Data data = task.data();
             res.append(String.format(template, data.id(), data.title(), data.done() ? "выполнено" : "не выполнено"));
         }
 

todo/src/main/java/ru/kamask/pet/todo/repo/InMemoryTaskRepository.java

@@ -6,23 +6,23 @@ import java.util.List;
 import java.util.Map;
 import java.util.Optional;
 
-import ru.kamask.pet.todo.model.Task;
+import ru.kamask.pet.todo.model.SimpleTask;
 
 public class InMemoryTaskRepository implements TaskRepository {
-    private Map<Integer, Task> storage = new HashMap<>();
+    private Map<Integer, SimpleTask> storage = new HashMap<>();
 
     @Override
-    public void save(Task task) {
+    public void save(SimpleTask task) {
         storage.put(task.id(), task);
     }
 
     @Override
-    public Optional<Task> findById(int id) {
+    public Optional<SimpleTask> findById(int id) {
         return Optional.ofNullable(storage.get(id));
     }
 
     @Override
-    public List<Task> findAll() {
+    public List<SimpleTask> findAll() {
         return new ArrayList<>(storage.values());
     }
 

todo/src/main/java/ru/kamask/pet/todo/repo/Repository.java

@@ -0,0 +1,14 @@
+package ru.kamask.pet.todo.repo;
+
+import java.util.List;
+import java.util.Optional;
+
+import ru.kamask.pet.todo.model.Identifiable;
+
+public interface Repository<T extends Identifiable> {
+    void save(T obj);
+    Optional<T> findById(int id);
+    List<T> findAll();
+    void delete(int id);
+    boolean has(int id);
+}

todo/src/main/java/ru/kamask/pet/todo/repo/TaskRepository.java

@@ -1,18 +1,5 @@
 package ru.kamask.pet.todo.repo;
 
-import java.util.List;
-import java.util.Optional;
+import ru.kamask.pet.todo.model.SimpleTask;
 
-import ru.kamask.pet.todo.model.Task;
-
-public interface TaskRepository {
-    void save(Task task);
-
-    Optional<Task> findById(int id);
-
-    List<Task> findAll();
-
-    void delete(int id);
-
-    boolean has(int id);
-}
+public interface TaskRepository extends Repository<SimpleTask> {}

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

@@ -3,7 +3,6 @@ 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;
 
@@ -18,7 +17,7 @@ public class TaskService {
         repo.save(new SimpleTask(title));
     }
 
-    public Optional<Task> getById(int id) {
+    public Optional<SimpleTask> getById(int id) {
         return repo.findById(id);
     }
 
@@ -31,7 +30,7 @@ public class TaskService {
         return false;
     }
 
-    public List<Task> list() {
+    public List<SimpleTask> list() {
         return repo.findAll();
     }
 
@@ -43,9 +42,9 @@ public class TaskService {
         return repo.has(id);
     }
 
-    public List<Task> search(String query) {
+    public List<SimpleTask> search(String query) {
         return repo.findAll().stream()
-                .filter(task -> ((SimpleTask) task).data().title().contains(query))
+                .filter(task -> task.data().title().contains(query))
                 .toList();
     }
 }