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// Copyright 2015 Rick Beton. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// This tool prints equivalences between the string representation and the internal numerical
// representation for dates and clocks.
package main
import (
"fmt"
"os"
"strconv"
"github.com/rickb777/date"
"github.com/rickb777/date/clock"
"golang.org/x/text/language"
"golang.org/x/text/message"
)
func usage() {
fmt.Printf("Usage: %s [-t] number | date | time\n\n", os.Args[0])
fmt.Printf(" -t: terse output\n")
fmt.Printf(" date: [+-]yyyy/mm/dd | yyyy.mm.dd | dd/mm/yyyy | dd.mm.yyyy\n")
fmt.Printf(" time: e.g. 11:15:20 | 2:45pm | 1:15:10.101\n")
os.Exit(0)
}
var titled = false
var terse = false
var success = false
var printer = message.NewPrinter(language.English)
func sprintf(num interface{}) string {
if terse {
return fmt.Sprintf("%d", num)
} else {
return printer.Sprintf("%d", num)
}
}
func title() {
if !terse && !titled {
titled = true
fmt.Printf("%-15s %-15s %-15s %s\n", "input", "number", "clock", "date")
fmt.Printf("%-15s %-15s %-15s %s\n", "-----", "------", "-----", "----")
}
}
func printArg(arg string) {
i, err := strconv.ParseInt(arg, 10, 64)
if err == nil {
title()
d := date.NewOfDays(date.PeriodOfDays(i))
c := clock.Clock(i)
fmt.Printf("%-15s %-15s %-15s %-12s %s\n", arg, sprintf(i), c, d, d.Weekday())
success = true
return
}
d, e1 := date.AutoParse(arg)
if e1 == nil {
title()
fmt.Printf("%-15s %-15s %15s %-12s %s\n", arg, sprintf(d.DaysSinceEpoch()), "", d, d.Weekday())
success = true
}
c, err := clock.Parse(arg)
if err == nil {
title()
fmt.Printf("%-15s %-15s %s\n", arg, sprintf(c), c)
success = true
}
}
func main() {
argsWithoutProg := os.Args[1:]
if len(argsWithoutProg) == 0 {
usage()
}
if len(argsWithoutProg) > 0 && argsWithoutProg[0] == "-t" {
terse = true
argsWithoutProg = argsWithoutProg[1:]
}
for _, arg := range argsWithoutProg {
printArg(arg)
}
if !success {
usage()
}
if titled {
fmt.Printf("\n# dates are counted using days since Thursday 1st Jan 1970\n")
fmt.Printf("# clock operates via milliseconds since midnight\n")
}
}
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