105 lines
2.6 KiB
Go
105 lines
2.6 KiB
Go
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package iso8601
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import (
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"errors"
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"regexp"
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)
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//Duration of iso8601
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type Duration struct {
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years string //= number of years
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months string //= number of months
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days string //= number of days
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// Time section
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hours string //= the number of hours
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minutes string //= the number of minutes
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seconds string //= the number of seconds
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}
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//NewDuration return duration
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func NewDuration(years, months, days, hours, minutes, seconds string) (*Duration, error) {
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// Pattern for Years, Months, Days, Hours and Minutes components
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pattern1 := "^$|[0-9]+"
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// Pattern for Seconds component
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pattern2 := "^$|[0-9]+(\\.[0-9]+)?"
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matched, err := regexp.MatchString(pattern1, years)
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if err != nil {
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return nil, err
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} else if !matched {
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return nil, errors.New("years value = " + years + " does not match pattern " + pattern1)
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}
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matched, err = regexp.MatchString(pattern1, months)
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if err != nil {
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return nil, err
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} else if !matched {
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return nil, errors.New("months value = " + months + " does not match pattern " + pattern1)
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}
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matched, err = regexp.MatchString(pattern1, days)
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if err != nil {
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return nil, err
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} else if !matched {
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return nil, errors.New("months value = " + days + " does not match pattern " + pattern1)
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}
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matched, err = regexp.MatchString(pattern1, hours)
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if err != nil {
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return nil, err
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} else if !matched {
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return nil, errors.New("months value = " + hours + " does not match pattern " + pattern1)
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}
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matched, err = regexp.MatchString(pattern1, minutes)
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if err != nil {
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return nil, err
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} else if !matched {
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return nil, errors.New("months value = " + minutes + " does not match pattern " + pattern1)
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}
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matched, err = regexp.MatchString(pattern2, seconds)
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if err != nil {
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return nil, err
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} else if !matched {
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return nil, errors.New("years value = " + seconds + " does not match pattern " + pattern2)
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}
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return &Duration{years: years, months: months, hours: hours, days: days, minutes: minutes, seconds: seconds}, nil
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}
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//ISO8601Duration to string
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func (duration Duration) ISO8601Duration() string {
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var result string
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result += "P" // time duration designator
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//years
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if duration.years != "" {
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result += duration.years + "Y"
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}
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if duration.months != "" {
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result += duration.months + "M"
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}
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if duration.days != "" {
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result += duration.days + "D"
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}
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if duration.hours != "" && duration.minutes != "" && duration.seconds != "" {
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result += "T"
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if duration.hours != "" {
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result += duration.hours + "H"
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}
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if duration.minutes != "" {
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result += duration.minutes + "M"
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}
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if duration.seconds != "" {
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result += duration.seconds + "S"
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}
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}
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if len(result) == 1 {
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result += "T0S"
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}
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return result
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}
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