package announcement

import "fmt"

type Service struct {
	repo *Repository
}

func NewService(repo *Repository) *Service {
	return &Service{repo: repo}
}

func (s *Service) GetAll() ([]Announcement, error) {
	return s.repo.FindAll()
}

func (s *Service) Create(title, content string) (*Announcement, error) {
	a := &Announcement{Title: title, Content: content}
	return a, s.repo.Create(a)
}

func (s *Service) Update(id uint, title, content string) (*Announcement, error) {
	a, err := s.repo.FindByID(id)
	if err != nil {
		return nil, fmt.Errorf("공지사항을 찾을 수 없습니다")
	}
	if title != "" {
		a.Title = title
	}
	if content != "" {
		a.Content = content
	}
	return a, s.repo.Save(a)
}

func (s *Service) Delete(id uint) error {
	if _, err := s.repo.FindByID(id); err != nil {
		return fmt.Errorf("공지사항을 찾을 수 없습니다")
	}
	return s.repo.Delete(id)
}