101 lines
2.1 KiB
Go
101 lines
2.1 KiB
Go
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package z
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import (
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"os/user"
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"regexp"
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"strconv"
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"time"
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"errors"
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)
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const (
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TFAbsTwelveHour int = 0
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TFAbsTwentyfourHour int = 1
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TFRelHourMinute int = 2
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TFRelHourFraction int = 3
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)
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func TimeFormats() []string {
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return []string{
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`^\d{1,2}:\d{1,2}(am|pm)$`, // Absolute twelve hour format
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`^\d{1,2}:\d{1,2}$`, // Absolute twenty four hour format
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`^([+-])(\d{1,2}):(\d{1,2})$`, // Relative hour:minute format
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`^([+-])(\d{1,2})\.(\d{1,2})$`, // Relative hour.fraction format
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}
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}
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func GetCurrentUser() (string) {
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user, err := user.Current()
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if err != nil {
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return "unknown"
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}
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return user.Username
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}
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func GetTimeFormat(timeStr string) (int) {
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var matched bool
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var regerr error
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for timeFormatId, timeFormat := range TimeFormats() {
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matched, regerr = regexp.MatchString(timeFormat, timeStr)
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if regerr != nil {
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return -1
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}
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if matched == true {
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return timeFormatId
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}
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}
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return -1
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}
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func RelToTime(timeStr string, ftId int) (time.Time, error) {
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var re = regexp.MustCompile(TimeFormats()[ftId])
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gm := re.FindStringSubmatch(timeStr)
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if len(gm) < 4 {
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return time.Now(), errors.New("No match")
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}
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var hours int = 0
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var minutes int = 0
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if ftId == TFRelHourFraction {
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f, _ := strconv.ParseFloat(gm[2] + "." + gm[3], 32)
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minutes = int(f * 60.0)
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} else {
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hours, _ = strconv.Atoi(gm[2])
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minutes, _ = strconv.Atoi(gm[3])
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}
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var t time.Time
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switch gm[1] {
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case "+":
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t = time.Now().Local().Add(time.Hour * time.Duration(hours) + time.Minute * time.Duration(minutes))
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case "-":
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t = time.Now().Local().Add((time.Hour * time.Duration(hours) + time.Minute * time.Duration(minutes)) * -1)
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}
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return t, nil
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}
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func ParseTime(timeStr string) (time.Time, error) {
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tfId := GetTimeFormat(timeStr)
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switch tfId {
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case TFAbsTwelveHour:
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return time.Parse("3:04pm", timeStr)
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case TFAbsTwentyfourHour:
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return time.Parse("15:04", timeStr)
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case TFRelHourMinute, TFRelHourFraction:
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return RelToTime(timeStr, tfId)
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default:
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return time.Now(), errors.New("No match")
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}
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}
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