/*
Copyright 2016 The Kubernetes Authors All rights reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package timeconv

import (
	"time"

	"github.com/golang/protobuf/ptypes/timestamp"
)

// Now creates a timestamp.Timestamp representing the current time.
func Now() *timestamp.Timestamp {
	return Timestamp(time.Now())
}

// Timestamp converts a time.Time to a protobuf *timestamp.Timestamp.
func Timestamp(t time.Time) *timestamp.Timestamp {
	return &timestamp.Timestamp{
		Seconds: t.Unix(),
		Nanos:   int32(t.Nanosecond()),
	}
}

// Time converts a protobuf *timestamp.Timestamp to a time.Time.
func Time(ts *timestamp.Timestamp) time.Time {
	return time.Unix(ts.Seconds, int64(ts.Nanos))
}

// Format formats a *timestamp.Timestamp into a string.
//
// This follows the rules for time.Time.Format().
func Format(ts *timestamp.Timestamp, layout string) string {
	return Time(ts).Format(layout)
}

// String formats the timestamp into a user-friendly string.
//
// Currently, this uses the 'time.ANSIC' format string, but there is no guarantee
// that this will not change.
//
// This is a convenience function for formatting timestamps for user display.
func String(ts *timestamp.Timestamp) string {
	return Format(ts, time.ANSIC)
}
