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repository.go
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/
repository.go
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package factorial
import (
"github.com/gofrs/uuid"
"golang.org/x/oauth2"
)
// TokenRepository interface will be used for persist
// our oauth token
type TokenRepository interface {
SaveToken(id uuid.UUID, t *oauth2.Token) error
UpdateToken(id uuid.UUID, t *oauth2.Token) error
GetToken(id uuid.UUID) (*oauth2.Token, error)
}
// tokenRefresher implements oauth2.TokenSource
// with a custom repository
type tokenRefresher struct {
repo TokenRepository
id uuid.UUID
provider *OAuthProvider
}
// NewTokenSource will build a new token source with the given criteria
func NewTokenSource(repo TokenRepository, id uuid.UUID, provider *OAuthProvider) oauth2.TokenSource {
return &tokenRefresher{
repo: repo,
id: id,
provider: provider,
}
}
// Token method is the custom implementation of the refresh token process using
// a token repo as a base
func (t *tokenRefresher) Token() (*oauth2.Token, error) {
token, err := t.repo.GetToken(t.id)
if err != nil {
return nil, err
}
if !token.Valid() {
token, err := t.provider.RefreshToken(token)
if err != nil {
return nil, err
}
if err = t.repo.UpdateToken(t.id, token); err != nil {
return nil, err
}
return token, nil
}
return token, nil
}