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129 lines
3.9 KiB
Go
129 lines
3.9 KiB
Go
// Copyright 2015 Rick Beton. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package period
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import (
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"bytes"
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"fmt"
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"strings"
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"github.com/rickb777/plural"
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)
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// Format converts the period to human-readable form using the default localisation.
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func (period Period) Format() string {
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return period.FormatWithPeriodNames(PeriodYearNames, PeriodMonthNames, PeriodWeekNames, PeriodDayNames, PeriodHourNames, PeriodMinuteNames, PeriodSecondNames)
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}
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// FormatWithPeriodNames converts the period to human-readable form in a localisable way.
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func (period Period) FormatWithPeriodNames(yearNames, monthNames, weekNames, dayNames, hourNames, minNames, secNames plural.Plurals) string {
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period = period.Abs()
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parts := make([]string, 0)
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parts = appendNonBlank(parts, yearNames.FormatFloat(absFloat10(period.years)))
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parts = appendNonBlank(parts, monthNames.FormatFloat(absFloat10(period.months)))
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if period.days > 0 || (period.IsZero()) {
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if len(weekNames) > 0 {
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weeks := period.days / 70
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mdays := period.days % 70
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//fmt.Printf("%v %#v - %d %d\n", period, period, weeks, mdays)
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if weeks > 0 {
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parts = appendNonBlank(parts, weekNames.FormatInt(int(weeks)))
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}
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if mdays > 0 || weeks == 0 {
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parts = appendNonBlank(parts, dayNames.FormatFloat(absFloat10(mdays)))
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}
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} else {
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parts = appendNonBlank(parts, dayNames.FormatFloat(absFloat10(period.days)))
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}
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}
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parts = appendNonBlank(parts, hourNames.FormatFloat(absFloat10(period.hours)))
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parts = appendNonBlank(parts, minNames.FormatFloat(absFloat10(period.minutes)))
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parts = appendNonBlank(parts, secNames.FormatFloat(absFloat10(period.seconds)))
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return strings.Join(parts, ", ")
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}
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func appendNonBlank(parts []string, s string) []string {
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if s == "" {
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return parts
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}
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return append(parts, s)
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}
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// PeriodDayNames provides the English default format names for the days part of the period.
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// This is a sequence of plurals where the first match is used, otherwise the last one is used.
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// The last one must include a "%v" placeholder for the number.
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var PeriodDayNames = plural.FromZero("%v days", "%v day", "%v days")
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// PeriodWeekNames is as for PeriodDayNames but for weeks.
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var PeriodWeekNames = plural.FromZero("", "%v week", "%v weeks")
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// PeriodMonthNames is as for PeriodDayNames but for months.
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var PeriodMonthNames = plural.FromZero("", "%v month", "%v months")
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// PeriodYearNames is as for PeriodDayNames but for years.
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var PeriodYearNames = plural.FromZero("", "%v year", "%v years")
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// PeriodHourNames is as for PeriodDayNames but for hours.
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var PeriodHourNames = plural.FromZero("", "%v hour", "%v hours")
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// PeriodMinuteNames is as for PeriodDayNames but for minutes.
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var PeriodMinuteNames = plural.FromZero("", "%v minute", "%v minutes")
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// PeriodSecondNames is as for PeriodDayNames but for seconds.
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var PeriodSecondNames = plural.FromZero("", "%v second", "%v seconds")
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// String converts the period to ISO-8601 form.
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func (period Period) String() string {
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if period.IsZero() {
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return "P0D"
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}
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buf := &bytes.Buffer{}
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if period.Sign() < 0 {
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buf.WriteByte('-')
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}
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buf.WriteByte('P')
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if period.years != 0 {
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fmt.Fprintf(buf, "%gY", absFloat10(period.years))
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}
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if period.months != 0 {
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fmt.Fprintf(buf, "%gM", absFloat10(period.months))
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}
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if period.days != 0 {
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if period.days%70 == 0 {
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fmt.Fprintf(buf, "%gW", absFloat10(period.days/7))
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} else {
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fmt.Fprintf(buf, "%gD", absFloat10(period.days))
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}
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}
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if period.hours != 0 || period.minutes != 0 || period.seconds != 0 {
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buf.WriteByte('T')
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}
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if period.hours != 0 {
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fmt.Fprintf(buf, "%gH", absFloat10(period.hours))
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}
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if period.minutes != 0 {
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fmt.Fprintf(buf, "%gM", absFloat10(period.minutes))
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}
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if period.seconds != 0 {
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fmt.Fprintf(buf, "%gS", absFloat10(period.seconds))
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}
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return buf.String()
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}
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func absFloat10(v int16) float32 {
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f := float32(v) / 10
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if v < 0 {
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return -f
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}
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return f
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}
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