lan
4d8f2ec997
Set up project files and add .gitignore to exclude local build/runtime artifacts. Made-with: Cursor
140 lines
3.5 KiB
Go
140 lines
3.5 KiB
Go
package service
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import (
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"carrot_bbs/internal/model"
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"carrot_bbs/internal/repository"
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"errors"
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"net/url"
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"strings"
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)
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var (
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ErrStickerAlreadyExists = errors.New("sticker already exists")
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ErrInvalidStickerURL = errors.New("invalid sticker url")
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)
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// StickerService 自定义表情服务接口
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type StickerService interface {
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// 获取用户的所有表情
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GetUserStickers(userID string) ([]model.UserSticker, error)
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// 添加表情
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AddSticker(userID string, url string, width, height int) (*model.UserSticker, error)
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// 删除表情
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DeleteSticker(userID string, stickerID string) error
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// 检查表情是否已存在
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CheckExists(userID string, url string) (bool, error)
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// 重新排序
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ReorderStickers(userID string, orders map[string]int) error
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// 获取用户表情数量
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GetStickerCount(userID string) (int64, error)
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}
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// stickerService 自定义表情服务实现
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type stickerService struct {
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stickerRepo repository.StickerRepository
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}
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// NewStickerService 创建自定义表情服务
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func NewStickerService(stickerRepo repository.StickerRepository) StickerService {
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return &stickerService{
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stickerRepo: stickerRepo,
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}
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}
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// GetUserStickers 获取用户的所有表情
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func (s *stickerService) GetUserStickers(userID string) ([]model.UserSticker, error) {
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stickers, err := s.stickerRepo.GetByUserID(userID)
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if err != nil {
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return nil, err
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}
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// 兼容历史脏数据：过滤本地文件 URI，避免客户端加载 file:// 报错
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filtered := make([]model.UserSticker, 0, len(stickers))
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for _, sticker := range stickers {
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if isValidStickerURL(sticker.URL) {
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filtered = append(filtered, sticker)
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}
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}
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return filtered, nil
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}
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// AddSticker 添加表情
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func (s *stickerService) AddSticker(userID string, url string, width, height int) (*model.UserSticker, error) {
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if !isValidStickerURL(url) {
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return nil, ErrInvalidStickerURL
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}
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// 检查是否已存在
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exists, err := s.stickerRepo.Exists(userID, url)
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if err != nil {
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return nil, err
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}
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if exists {
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return nil, ErrStickerAlreadyExists
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}
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// 获取当前数量用于设置排序
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count, err := s.stickerRepo.CountByUserID(userID)
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if err != nil {
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return nil, err
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}
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sticker := &model.UserSticker{
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UserID: userID,
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URL: url,
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Width: width,
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Height: height,
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SortOrder: int(count), // 新表情添加到末尾
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}
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if err := s.stickerRepo.Create(sticker); err != nil {
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return nil, err
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}
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return sticker, nil
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}
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func isValidStickerURL(raw string) bool {
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trimmed := strings.TrimSpace(raw)
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if trimmed == "" {
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return false
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}
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parsed, err := url.Parse(trimmed)
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if err != nil {
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return false
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}
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scheme := strings.ToLower(parsed.Scheme)
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return scheme == "http" || scheme == "https"
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}
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// DeleteSticker 删除表情
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func (s *stickerService) DeleteSticker(userID string, stickerID string) error {
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// 先检查表情是否属于该用户
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sticker, err := s.stickerRepo.GetByID(stickerID)
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if err != nil {
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return err
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}
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if sticker.UserID != userID {
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return errors.New("sticker not found")
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}
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return s.stickerRepo.Delete(stickerID)
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}
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// CheckExists 检查表情是否已存在
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func (s *stickerService) CheckExists(userID string, url string) (bool, error) {
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return s.stickerRepo.Exists(userID, url)
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}
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// ReorderStickers 重新排序
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func (s *stickerService) ReorderStickers(userID string, orders map[string]int) error {
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return s.stickerRepo.BatchUpdateSortOrder(userID, orders)
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}
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// GetStickerCount 获取用户表情数量
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func (s *stickerService) GetStickerCount(userID string) (int64, error) {
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return s.stickerRepo.CountByUserID(userID)
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}
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