// file name: post_domain_service.go
package domainservice

import (
	"bbs-backend/api/request"
	"bbs-backend/common/errcode"
	"bbs-backend/dal/dao"
	"bbs-backend/dal/model"
)

func CreatePostDomainService(post *model.Post) error {
	// 验证帖子内容
	if post.Title == "" {
		return errcode.ErrInvalidTitle
	}
	if post.Content == "" {
		return errcode.ErrInvalidContent
	}

	// 创建帖子
	err := dao.CreatePost(post)
	if err != nil {
		return errcode.ErrInternalServerError
	}

	return nil
}

func GetPostDomainService(postID uint) (*model.Post, error) {
	post, err := dao.GetPostByID(postID)
	if err != nil {
		return nil, errcode.ErrInternalServerError
	}

	return post, nil
}

func GetPostsDomainService(req request.GetPostsRequest) ([]*model.Post, error) {
	posts, err := dao.GetPosts(req)
	if err != nil {
		return nil, errcode.ErrInternalServerError
	}

	return posts, nil
}