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cloudreve/pkg/hashid/hash.go

71 lines
1.3 KiB

package hashid
import (
"errors"
"github.com/cloudreve/Cloudreve/v3/pkg/conf"
"github.com/speps/go-hashids"
)
// ID类型
const (
ShareID = iota // 分享
UserID // 用户
FileID // 文件ID
FolderID // 目录ID
TagID // 标签ID
PolicyID // 存储策略ID
SourceLinkID
)
var (
// ErrTypeNotMatch ID类型不匹配
ErrTypeNotMatch = errors.New("mismatched ID type.")
)
// HashEncode 对给定数据计算HashID
func HashEncode(v []int) (string, error) {
hd := hashids.NewData()
hd.Salt = conf.SystemConfig.HashIDSalt
h, err := hashids.NewWithData(hd)
if err != nil {
return "", err
}
id, err := h.Encode(v)
if err != nil {
return "", err
}
return id, nil
}
// HashDecode 对给定数据计算原始数据
func HashDecode(raw string) ([]int, error) {
hd := hashids.NewData()
hd.Salt = conf.SystemConfig.HashIDSalt
h, err := hashids.NewWithData(hd)
if err != nil {
return []int{}, err
}
return h.DecodeWithError(raw)
}
// HashID 计算数据库内主键对应的HashID
func HashID(id uint, t int) string {
v, _ := HashEncode([]int{int(id), t})
return v
}
// DecodeHashID 计算HashID对应的数据库ID
func DecodeHashID(id string, t int) (uint, error) {
v, _ := HashDecode(id)
if len(v) != 2 || v[1] != t {
return 0, ErrTypeNotMatch
}
return uint(v[0]), nil
}