ARM-software/golang-utils

/*
 * Copyright (C) 2020-2022 Arm Limited or its affiliates and Contributors. All rights reserved.
 * SPDX-License-Identifier: Apache-2.0
 */
package filesystem

import (
    "fmt"
    "os"
    "time"

    fileTimes "github.com/djherbis/times"

    "github.com/ARM-software/golang-utils/utils/commonerrors"
)

func DetermineFileTimes(info os.FileInfo) (times FileTimeInfo, err error) {
    if info == nil {
        err = fmt.Errorf("no file information defined: %w", commonerrors.ErrUndefined)
        return
    }
    if info.Sys() == nil {
        times = newDefaultTimeInfo(info)
    } else {
        times = &genericTimeInfo{fileTimes.Get(info)}
    }
    return
}

type defaultTimeInfo struct {
    modTime time.Time
}

func (i *defaultTimeInfo) ModTime() time.Time {
    return i.modTime
}
func (i *defaultTimeInfo) AccessTime() time.Time {
    return time.Now()
}
func (i *defaultTimeInfo) ChangeTime() time.Time {
    return time.Now()
}
func (i *defaultTimeInfo) BirthTime() time.Time {
    return time.Now()
}
func (i *defaultTimeInfo) HasChangeTime() bool {
    return false
}
func (i *defaultTimeInfo) HasBirthTime() bool {
    return false
}

func (i *defaultTimeInfo) HasAccessTime() bool {
    return false
}

func newDefaultTimeInfo(f os.FileInfo) (info *defaultTimeInfo) {
    info = &defaultTimeInfo{}
    if f != nil {
        info.modTime = f.ModTime()
    }
    return
}

type genericTimeInfo struct {
    fileTimes.Timespec
}

func (i *genericTimeInfo) HasAccessTime() bool {
    return false
}