54 lines
1.2 KiB
Go
54 lines
1.2 KiB
Go
// For more tutorials: https://blog.learngoprogramming.com
|
|
//
|
|
// Copyright © 2018 Inanc Gumus
|
|
// Learn Go Programming Course
|
|
// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
|
|
//
|
|
|
|
package main
|
|
|
|
import (
|
|
"strconv"
|
|
"time"
|
|
)
|
|
|
|
// timestamp stores, formats and automatically prints a timestamp: it's a stringer.
|
|
type timestamp struct {
|
|
// timestamp embeds a time, therefore it can be used as a time value.
|
|
// there is no need to convert a time value to a timestamp value.
|
|
time.Time
|
|
}
|
|
|
|
// String method makes the timestamp an fmt.stringer.
|
|
func (ts timestamp) String() string {
|
|
if ts.IsZero() {
|
|
return "unknown"
|
|
}
|
|
|
|
// Mon Jan 2 15:04:05 -0700 MST 2006
|
|
const layout = "2006/01"
|
|
return ts.Format(layout)
|
|
}
|
|
|
|
// toTimestamp returns a timestamp value depending on the type of `v`.
|
|
// toTimestamp was "book.format()" before.
|
|
func toTimestamp(v interface{}) timestamp {
|
|
var t int
|
|
|
|
switch v := v.(type) {
|
|
case int:
|
|
// book{title: "moby dick", price: 10, published: 118281600},
|
|
t = v
|
|
case string:
|
|
// book{title: "odyssey", price: 15, published: "733622400"},
|
|
t, _ = strconv.Atoi(v)
|
|
default:
|
|
// book{title: "hobbit", price: 25},
|
|
return timestamp{}
|
|
}
|
|
|
|
return timestamp{
|
|
Time: time.Unix(int64(t), 0),
|
|
}
|
|
}
|