43 lines
867 B
Go
43 lines
867 B
Go
// Copyright (c) Mainflux
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// SPDX-License-Identifier: Apache-2.0
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// Package ulid provides a ULID identity provider.
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package ulid
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import (
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"time"
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"github.com/mainflux/mainflux"
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"github.com/mainflux/mainflux/pkg/errors"
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"github.com/oklog/ulid/v2"
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mathrand "math/rand"
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)
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// ErrGeneratingID indicates error in generating ULID.
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var ErrGeneratingID = errors.New("generating id failed")
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var _ mainflux.IDProvider = (*ulidProvider)(nil)
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type ulidProvider struct {
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entropy *mathrand.Rand
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}
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// New instantiates a ULID provider.
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func New() mainflux.IDProvider {
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seed := time.Now().UnixNano()
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source := mathrand.NewSource(seed)
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return &ulidProvider{
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entropy: mathrand.New(source),
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}
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}
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func (up *ulidProvider) ID() (string, error) {
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id, err := ulid.New(ulid.Timestamp(time.Now()), up.entropy)
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if err != nil {
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return "", err
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}
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return id.String(), nil
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}
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