MartinHeinz/blog-backend

package services

import (
    "fmt"
    "github.com/MartinHeinz/blog-backend/cmd/blog_backend/models"
)

type bookDAO interface {
    FindAll() []models.Book
}

type BookService struct {
    dao bookDAO
}

// NewBookService creates a new BookService with the given book DAO.
func NewBookService(dao bookDAO) *BookService {
    return &BookService{dao}
}

func (s *BookService) FindAll() ([]models.Book, error) {
    books := s.dao.FindAll()
    err := fmt.Errorf("no books found")
    if len(books) > 0 {
        return books, nil
    }
    return books, err
}