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dex/user/util.go

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2015-08-18 05:57:27 +05:30
package user
import (
"encoding/base64"
"encoding/json"
)
// nextPageToken exists solely for JSON marshaling/unmarshaling nextPage params.
// It is not exported because we want nextPageTokens to be opaque and not rely
// on any specific encoding. However, because this encoding happens to be useful
// for both the in-mem and DB repo, we export the {Encode,Decode}NextPageToken
// functions.
type nextPageToken struct {
Filter UserFilter
MaxResults int
Offset int
}
func EncodeNextPageToken(filter UserFilter, maxResults int, offset int) (string, error) {
tok := nextPageToken{
Filter: filter,
MaxResults: maxResults,
Offset: offset,
}
b, err := json.Marshal(&tok)
if err != nil {
return "", err
}
enc := base64.URLEncoding.EncodeToString(b)
return enc, nil
}
func DecodeNextPageToken(tok string) (UserFilter, int, int, error) {
b, err := base64.URLEncoding.DecodeString(tok)
if err != nil {
return UserFilter{}, 0, 0, err
}
var npt nextPageToken
err = json.Unmarshal(b, &npt)
if err != nil {
return UserFilter{}, 0, 0, err
}
return npt.Filter, npt.MaxResults, npt.Offset, nil
}