MartinHeinz/blog-backend

package services

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

type postDAO interface {
    Get(id uint) (*models.Post, error)
    FindAll() []models.Post
    FindAllByTag(tagName string) []models.Post
}

type PostService struct {
    dao postDAO
}

// NewPostService creates a new PostService with the given post DAO.
func NewPostService(dao postDAO) *PostService {
    return &PostService{dao}
}

func (s *PostService) Get(id uint) (*models.Post, error) {
    return s.dao.Get(id)
}

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

func (s *PostService) FindAllByTag(tagName string) ([]models.Post, error) {
    posts := s.dao.FindAllByTag(tagName)
    err := fmt.Errorf("no posts found")
    if len(posts) > 0 {
        return posts, nil
    }
    return posts, err
}