src/main/java/org/example/manager/CourseManager.java - dev - dmuruz/Course_Service

src/main/java/org/example/manager/CourseManager.java
62 строки2 KB
Danil Muruz
MVP
24 апр 2025, 09:39
24 апр 2025, 09:3916b1c45
package org.example.manager;

import org.example.dao.CourseRepository;
import org.example.dao.LessonRepository;
import org.example.dto.CourseDTO;
import org.example.model.Course;
import org.example.model.Lesson;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Optional;

@Service
public class CourseManager {

    @Autowired
    private CourseRepository courseRepository;

    @Autowired
    private LessonRepository lessonRepository;

    public Course createCourse(CourseDTO courseDTO) {
        Course course = new Course();
        course.setName(courseDTO.getName());
        course.setDescription(courseDTO.getDescription());
        course.setOrderNum(courseDTO.getOrderNum());
        return courseRepository.save(course);
    }

    public List<Course> getAllCourses() {
        return courseRepository.findAll();
    }

    public Optional<Course> getCourseById(Long id) {
        return courseRepository.findById(id);
    }

    public Course updateCourse(Long id, CourseDTO courseDTO) {
        Optional<Course> optCourse = courseRepository.findById(id);
        if (optCourse.isPresent()) {
            Course course = optCourse.get();
            course.setName(courseDTO.getName());
            course.setDescription(courseDTO.getDescription());
            course.setOrderNum(courseDTO.getOrderNum());
            return courseRepository.save(course);
        }
        throw new RuntimeException("Курс не найден с id: " + id);
    }

    public void deleteCourse(Long id) {
        courseRepository.deleteById(id);
    }

    public List<Lesson> getLessonsByCourseId(Long courseId) {
        Optional<Course> course = courseRepository.findById(courseId);
        if (course.isPresent()) {
            return lessonRepository.findByCourse(course.get());
        }
        throw new RuntimeException("Курс не найден с id: " + courseId);
    }
}