// The MIT License
//
// Copyright (c) 2020 Temporal Technologies Inc.  All rights reserved.
//
// Copyright (c) 2020 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

package common

import (
	"time"
)

// TimeValue dereference time in a safe way.
func TimeValue(t *time.Time) time.Time {
	if t == nil {
		return time.Time{}
	}
	return *t
}

// DurationValue dereference duration in a safe way.
func DurationValue(d *time.Duration) time.Duration {
	if d == nil {
		return 0
	}
	return *d
}

// MinDurationPtr returns pointer to minimum duration.
func MinDurationPtr(d1 *time.Duration, d2 *time.Duration) *time.Duration {
	d1v, d2v := DurationValue(d1), DurationValue(d2)
	if d1v > d2v {
		return &d2v
	}
	return &d1v
}

// DurationPtr returns pointer to duration.
func DurationPtr(d time.Duration) *time.Duration {
	return &d
}