MartinHeinz/blog-backend

package services

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

type tagDAO interface {
    FindAll(id uint) []models.Tag
}

type TagService struct {
    dao tagDAO
}

// NewTagService creates a new TagService with the given tag DAO.
func NewTagService(dao tagDAO) *TagService {
    return &TagService{dao}
}

func (s *TagService) FindAll(postId uint) ([]models.Tag, error) {
    tags := s.dao.FindAll(postId)
    err := fmt.Errorf("no tags found for post_id: %v", postId)
    if len(tags) > 0 {
        return tags, nil
    }
    return tags, err
}