feat: add lesson

src/main/java/aplp/backend/lms/course/domain/entities/Course.java

@@ -1,5 +1,6 @@
 package aplp.backend.lms.course.domain.entities;
 
+import aplp.backend.core.common.entity.BaseEntity;
 import jakarta.persistence.*;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
@@ -18,31 +19,11 @@ import java.time.Instant;
 @Getter
 @Setter
 @NoArgsConstructor
-public class Course {
-
-    @Id
-    @GeneratedValue(strategy = GenerationType.IDENTITY)
-    private Long id;
+public class Course extends BaseEntity {
 
     @Column(nullable = false, length = 200)
     private String title;
 
     @Column(length = 1000)
     private String description;
-
-    @CreatedBy
-    @Column(name = "created_by", updatable = false)
-    private Long createdBy;
-
-    @LastModifiedBy
-    @Column(name = "updated_by")
-    private Long updatedBy;
-
-    @CreatedDate
-    @Column(name = "created_at", nullable = false, updatable = false)
-    private Instant createdAt;
-
-    @LastModifiedDate
-    @Column(name = "updated_at", nullable = false)
-    private Instant updatedAt;
 }

src/main/java/aplp/backend/lms/lesson/api/controller/LessonController.java

@@ -0,0 +1,48 @@
+package aplp.backend.lms.lesson.api.controller;
+
+import aplp.backend.lms.lesson.application.dtos.LessonReqDto;
+import aplp.backend.lms.lesson.application.dtos.LessonResDto;
+import aplp.backend.lms.lesson.application.services.LessonService;
+import jakarta.validation.Valid;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/api/lessons")
+@RequiredArgsConstructor
+public class LessonController {
+
+    private final LessonService lessonService;
+
+    @GetMapping
+    public List<LessonResDto> getAll() {
+        return lessonService.getAll();
+    }
+
+    @GetMapping("/{id}")
+    public LessonResDto getById(@PathVariable Long id) {
+        return lessonService.getById(id);
+    }
+
+    @PostMapping
+    @ResponseStatus(HttpStatus.CREATED)
+    public LessonResDto create(@Valid @RequestBody LessonReqDto request) {
+        return lessonService.create(request);
+    }
+
+    @PutMapping("/{id}")
+    public LessonResDto update(
+            @PathVariable Long id,
+            @Valid @RequestBody LessonReqDto request) {
+        return lessonService.update(id, request);
+    }
+
+    @DeleteMapping("/{id}")
+    @ResponseStatus(HttpStatus.NO_CONTENT)
+    public void delete(@PathVariable Long id) {
+        lessonService.delete(id);
+    }
+}

src/main/java/aplp/backend/lms/lesson/application/dtos/LessonReqDto.java

@@ -0,0 +1,17 @@
+package aplp.backend.lms.lesson.application.dtos;
+
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.Size;
+
+public record LessonReqDto(
+        @NotBlank(message = "Lesson code is required")
+        @Size(max = 50, message = "Lesson code must not exceed 50 characters")
+        String lessonCode,
+
+        @NotBlank(message = "Lesson name is required")
+        @Size(max = 200, message = "Lesson name must not exceed 200 characters")
+        String lessonName,
+
+        @Size(max = 1000, message = "Description must not exceed 1000 characters")
+        String description
+) {}

src/main/java/aplp/backend/lms/lesson/application/dtos/LessonResDto.java

@@ -0,0 +1,25 @@
+package aplp.backend.lms.lesson.application.dtos;
+
+import aplp.backend.lms.lesson.domain.entities.Lesson;
+
+import java.time.LocalDateTime;
+
+public record LessonResDto(
+        Long id,
+        String lessonCode,
+        String lessonName,
+        String description,
+        LocalDateTime createdAt,
+        LocalDateTime updatedAt
+) {
+    public static LessonResDto from(Lesson lesson) {
+        return new LessonResDto(
+                lesson.getId(),
+                lesson.getLessonCode(),
+                lesson.getLessonName(),
+                lesson.getDescription(),
+                lesson.getCreatedAt(),
+                lesson.getUpdatedAt()
+        );
+    }
+}

src/main/java/aplp/backend/lms/lesson/application/mappers/LessonMapper.java

@@ -0,0 +1,20 @@
+package aplp.backend.lms.lesson.application.mappers;
+
+import aplp.backend.lms.lesson.application.dtos.LessonReqDto;
+import aplp.backend.lms.lesson.application.dtos.LessonResDto;
+import aplp.backend.lms.lesson.domain.entities.Lesson;
+import org.mapstruct.Mapper;
+import org.mapstruct.MappingTarget;
+
+@Mapper(componentModel = "spring")
+public interface LessonMapper {
+
+    LessonResDto toResponse(Lesson lesson);
+
+    Lesson toEntity(LessonReqDto request);
+
+    void updateEntity(
+            LessonReqDto request,
+            @MappingTarget Lesson lesson
+    );
+}

src/main/java/aplp/backend/lms/lesson/application/services/LessonService.java

@@ -0,0 +1,52 @@
+package aplp.backend.lms.lesson.application.services;
+
+import aplp.backend.core.common.exception.ResourceNotFoundException;
+import aplp.backend.lms.lesson.application.dtos.LessonReqDto;
+import aplp.backend.lms.lesson.application.dtos.LessonResDto;
+import aplp.backend.lms.lesson.application.mappers.LessonMapper;
+import aplp.backend.lms.lesson.domain.entities.Lesson;
+import aplp.backend.lms.lesson.domain.repositories.LessonRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+@RequiredArgsConstructor
+public class LessonService {
+
+    private final LessonRepository lessonRepository;
+    private final LessonMapper lessonMapper;
+
+    public List<LessonResDto> getAll() {
+        return lessonRepository.findAll()
+                .stream()
+                .map(LessonResDto::from)
+                .toList();
+    }
+
+    public LessonResDto getById(Long id) {
+        Lesson lesson = lessonRepository.findById(id)
+                .orElseThrow(() -> new ResourceNotFoundException("Lesson not found"));
+
+        return LessonResDto.from(lesson);
+    }
+
+    public LessonResDto create(LessonReqDto request) {
+        Lesson lesson = lessonMapper.toEntity(request);
+        return lessonMapper.toResponse(lessonRepository.save(lesson));
+    }
+
+    public LessonResDto update(Long id, LessonReqDto request) {
+        Lesson lesson = lessonRepository.findById(id)
+                .orElseThrow(() -> new ResourceNotFoundException("Lesson not found"));
+
+        lessonMapper.updateEntity(request, lesson);
+
+        return lessonMapper.toResponse(lessonRepository.save(lesson));
+    }
+
+    public void delete(Long id) {
+        lessonRepository.deleteById(id);
+    }
+}

src/main/java/aplp/backend/lms/lesson/domain/entities/Lesson.java

@@ -0,0 +1,26 @@
+package aplp.backend.lms.lesson.domain.entities;
+
+import aplp.backend.core.common.entity.BaseEntity;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Table;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Entity
+@Table(name = "lessons")
+@Getter
+@Setter
+@NoArgsConstructor
+public class Lesson extends BaseEntity {
+
+    @Column(name = "lesson_code", nullable = false, length = 50, unique = true)
+    private String lessonCode;
+
+    @Column(name = "lesson_name", nullable = false, length = 200)
+    private String lessonName;
+
+    @Column(length = 1000)
+    private String description;
+}

src/main/java/aplp/backend/lms/lesson/domain/repositories/LessonRepository.java

@@ -0,0 +1,19 @@
+package aplp.backend.lms.lesson.domain.repositories;
+
+import aplp.backend.lms.lesson.domain.entities.Lesson;
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
+import java.util.Optional;
+
+@Repository
+public interface LessonRepository {
+
+    Optional<Lesson> findById(Long id);
+
+    List<Lesson> findAll();
+
+    Lesson save(Lesson lesson);
+
+    void deleteById(Long id);
+}

src/main/java/aplp/backend/lms/lesson/infrastructure/persistence/LessonJpaRepository.java

@@ -0,0 +1,9 @@
+package aplp.backend.lms.lesson.infrastructure.persistence;
+
+import aplp.backend.lms.lesson.domain.entities.Lesson;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface LessonJpaRepository extends JpaRepository<Lesson, Long> {
+}

src/main/java/aplp/backend/lms/lesson/infrastructure/persistence/LessonRepositoryImpl.java

@@ -0,0 +1,35 @@
+package aplp.backend.lms.lesson.infrastructure.persistence;
+
+import aplp.backend.lms.lesson.domain.entities.Lesson;
+import aplp.backend.lms.lesson.domain.repositories.LessonRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
+import java.util.Optional;
+
+@Repository
+@RequiredArgsConstructor
+public class LessonRepositoryImpl implements LessonRepository {
+    private final LessonJpaRepository repository;
+
+    @Override
+    public Optional<Lesson> findById(Long id) {
+        return repository.findById(id);
+    }
+
+    @Override
+    public List<Lesson> findAll() {
+        return repository.findAll();
+    }
+
+    @Override
+    public Lesson save(Lesson lesson) {
+        return repository.save(lesson);
+    }
+
+    @Override
+    public void deleteById(Long id) {
+        repository.deleteById(id);
+    }
+}

src/main/resources/db/migration/V2__course_audit_columns.sql

@@ -1,7 +0,0 @@
--- Flyway Migration V2: Add audit columns to courses
-
-ALTER TABLE courses
-    ADD COLUMN IF NOT EXISTS created_by BIGINT,
-    ADD COLUMN IF NOT EXISTS updated_by BIGINT,
-    ADD COLUMN IF NOT EXISTS created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
-    ADD COLUMN IF NOT EXISTS updated_at TIMESTAMPTZ NOT NULL DEFAULT now();

src/main/resources/db/migration/V2__lesson_module.sql

@@ -0,0 +1,14 @@
+-- Flyway Migration V3: Create lessons table
+
+CREATE TABLE IF NOT EXISTS lessons (
+    id BIGSERIAL PRIMARY KEY,
+    lesson_code VARCHAR(50) NOT NULL UNIQUE,
+    lesson_name VARCHAR(200) NOT NULL,
+    description VARCHAR(1000),
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    created_by VARCHAR(255),
+    updated_by VARCHAR(255),
+    deleted_at TIMESTAMPTZ,
+    deleted_by VARCHAR(255)
+);