mirror of
https://github.com/gravitational/teleport.git
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76 lines
2.2 KiB
Go
76 lines
2.2 KiB
Go
/*
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* Teleport
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* Copyright (C) 2023 Gravitational, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package utils
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import (
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"time"
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"github.com/jonboulle/clockwork"
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"google.golang.org/protobuf/types/known/timestamppb"
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)
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// TimeFromProto converts a protobuf Timestamp to a Go time.Time, preserving
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// the zero value across the conversion boundary (standard go/proto timestamp
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// conversion doesn't preserve "zeroness").
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func TimeFromProto(t *timestamppb.Timestamp) time.Time {
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// use the zero time to represent the nil timestamp. note that this is conceptually distinct
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// from using t.GetSeconds() == 0 && t.GetNanos() == 0. a timstampb that happens to be created
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// targeting the unix epoch isn't necessarily equivalent to a zero go timestamp, since the zero
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// value for the go timestamp isn't the unix epoch.
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if t == nil {
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return time.Time{}
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}
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return t.AsTime()
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}
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// TimeIntoProto converts a Go time.Time to a protobuf Timestamp, preserving
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// the zero value across the conversion boundary (standard go/proto timestamp
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// conversion doesn't preserve "zeroness").
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func TimeIntoProto(t time.Time) *timestamppb.Timestamp {
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if t.IsZero() {
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return nil
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}
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return timestamppb.New(t)
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}
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// MinTTL selects the smallest non-zero duration from a and b.
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func MinTTL(a, b time.Duration) time.Duration {
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if a == 0 {
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return b
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}
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if b == 0 {
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return a
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}
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if a < b {
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return a
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}
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return b
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}
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// ToTTL converts expiration time to TTL duration
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// relative to current time as provided by clock
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func ToTTL(c clockwork.Clock, tm time.Time) time.Duration {
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now := c.Now().UTC()
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if tm.IsZero() || tm.Before(now) {
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return 0
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}
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return tm.Sub(now)
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}
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