writefreely/auth.go

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package writefreely
// AuthenticateUser ensures a user with the given accessToken is valid. Call
// it before any operations that require authentication or optionally associate
// data with a user account.
// Returns an error if the given accessToken is invalid. Otherwise the
// associated user ID is returned.
func AuthenticateUser(db writestore, accessToken string) (int64, error) {
if accessToken == "" {
return 0, ErrNoAccessToken
}
userID := db.GetUserID(accessToken)
if userID == -1 {
return 0, ErrBadAccessToken
}
return userID, nil
}