(feat): finish simple backend

todo-workspace/backend/src/main/java/com/hepia/backend/controller/TodoController.java

 package com.hepia.backend.controller;
 
+import com.hepia.backend.domain.Todo;
+import com.hepia.backend.repository.TodoRepository;
 import lombok.RequiredArgsConstructor;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+import static org.springframework.http.HttpStatus.CREATED;
 
 @RestController
 @RequestMapping("/todos")
 @RequiredArgsConstructor
 public class TodoController {
+    private final TodoRepository todoRepository;
 
     @GetMapping
-    public String getTodos() {
-        return "Hello World!";
+    public ResponseEntity<List<Todo>> getAll() {
+        List<Todo> todos = todoRepository.findAll();
+        return ResponseEntity.ok(todos);
+    }
+
+    @PostMapping
+    public ResponseEntity<Todo> create(@RequestBody Todo todo) {
+        Todo saved = todoRepository.save(todo);
+        return ResponseEntity.status(CREATED).body(saved);
+    }
+
+    @DeleteMapping("/{id}")
+    public ResponseEntity<Void> delete(@PathVariable Long id) {
+        todoRepository.deleteById(id);
+        return ResponseEntity.noContent().build();
     }
 }

todo-workspace/backend/src/main/java/com/hepia/backend/domain/entity/TodoEntity.java → todo-workspace/backend/src/main/java/com/hepia/backend/domain/Todo.java

-package com.hepia.backend.domain.entity;
+package com.hepia.backend.domain;
 
 import jakarta.persistence.*;
 import lombok.*;
+import org.hibernate.annotations.CreationTimestamp;
 
 @Entity
-@Getter
-@Setter
-@Builder
+@Table(name = "todos")
+@Data
 @AllArgsConstructor
 @NoArgsConstructor
-@Table(name = "todos")
-public class TodoEntity {
+@Builder
+public class Todo {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
+
     private String name;
+
     private boolean completed;
+
+    @CreationTimestamp
     private String createdAt;
 }

todo-workspace/backend/src/main/java/com/hepia/backend/domain/model/Todo.java

-package com.hepia.backend.domain.model;
-
-import lombok.*;
-
-import java.time.LocalDateTime;
-
-@Getter
-@Setter
-@Builder
-@AllArgsConstructor
-@NoArgsConstructor
-public class Todo {
-    private Long id;
-    private String name;
-    private boolean completed;
-    private LocalDateTime createdAt;
-}

todo-workspace/backend/src/main/java/com/hepia/backend/repository/TodoRepository.java

+package com.hepia.backend.repository;
+
+import com.hepia.backend.domain.Todo;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface TodoRepository extends JpaRepository<Todo, Long> {}