// 获取用户对一批对象是否喜欢的状态
// objids 两个值
func FindUserLikeObjects(uid, objtype int, objids ...int) (map[int]int, error) {
if len(objids) < 2 {
return nil, errors.New("参数错误")
}
littleId, greatId := objids[0], objids[1]
if littleId > greatId {
littleId, greatId = greatId, littleId
}
query := "uid=? AND objtype=? AND objid BETWEEN ? AND ?"
args := []interface{}{uid, objtype, littleId, greatId}
logger.Debugln("query:", query, ";args:", args)
likes, err := model.NewLike().Where(query, args...).FindAll()
if err != nil {
return nil, err
}
likeFlags := make(map[int]int, len(objids))
for _, like := range likes {
likeFlags[like.Objid] = like.Flag
}
return likeFlags, nil
}
// 某个用户是否已经喜欢某个对象
func HadLike(uid, objid, objtype int) int {
cond := fmt.Sprintf("uid=%d AND objid=%d AND objtype=%d", uid, objid, objtype)
like := model.NewLike()
err := like.Where(cond).Find("flag")
if err != nil {
logger.Errorln("like service HadLike error:", err)
return 0
}
return like.Flag
}
// 喜欢或取消喜欢
// objid 注册的喜欢对象
// uid 喜欢的人
func LikeObject(uid, objid, objtype, likeFlag int) error {
// 点喜欢，活跃度+3
go IncUserWeight("uid="+strconv.Itoa(uid), 3)
cond := fmt.Sprintf("uid=%d AND objid=%d AND objtype=%d", uid, objid, objtype)
like := model.NewLike()
err := like.Where(cond).Find()
if err != nil {
return err
}
// 之前喜欢过
if like.Uid != 0 {
// 再喜欢直接返回
if likeFlag == model.FLAG_LIKE {
return nil
}
// 取消喜欢
if likeFlag == model.FLAG_CANCEL {
err = like.Where(cond).Delete()
if err != nil {
return err
}
// 取消喜欢成功，更新对象的喜欢数
if liker, ok := likers[objtype]; ok {
go liker.UpdateLike(objid, -1)
}
return nil
}
return nil
}
like.Uid = uid
like.Objid = objid
like.Objtype = objtype
like.Flag = likeFlag
affectedRows, err := like.Insert()
if err != nil {
logger.Errorln("LikeObject service error:", err)
return err
}
// 喜欢成功
if affectedRows > 0 {
if liker, ok := likers[objtype]; ok {
go liker.UpdateLike(objid, 1)
}
}
// TODO: 给被喜欢对象所有者发系统消息
/*
ext := map[string]interface{}{
"objid": objid,
"objtype": objtype,
"cid": cid,
"uid": uid,
}
go SendSystemMsgTo(0, objtype, ext)
*/
return nil
}