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